{"id":76956,"date":"2026-02-23T17:05:41","date_gmt":"2026-02-23T09:05:41","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/76956.html"},"modified":"2026-02-23T17:05:41","modified_gmt":"2026-02-23T09:05:41","slug":"java-%e4%b8%ad%e9%97%b4%e4%bb%b6%ef%bc%9aelasticsearch-%e8%81%9a%e5%90%88%e6%9f%a5%e8%af%a2%ef%bc%88terms-max-min-%e8%81%9a%e5%90%88%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/76956.html","title":{"rendered":"Java \u4e2d\u95f4\u4ef6\uff1aElasticsearch \u805a\u5408\u67e5\u8be2\uff08Terms\/Max\/Min \u805a\u5408\uff09"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260223090539-699c18635206e.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p>&#x1f44b; \u5927\u5bb6\u597d&#xff0c;\u6b22\u8fce\u6765\u5230\u6211\u7684\u6280\u672f\u535a\u5ba2&#xff01; &#x1f4da; \u5728\u8fd9\u91cc&#xff0c;\u6211\u4f1a\u5206\u4eab\u5b66\u4e60\u7b14\u8bb0\u3001\u5b9e\u6218\u7ecf\u9a8c\u4e0e\u6280\u672f\u601d\u8003&#xff0c;\u529b\u6c42\u7528\u7b80\u5355\u7684\u65b9\u5f0f\u8bb2\u6e05\u695a\u590d\u6742\u7684\u95ee\u9898\u3002 &#x1f3af; \u672c\u6587\u5c06\u56f4\u7ed5Java\u4e2d\u95f4\u4ef6\u8fd9\u4e2a\u8bdd\u9898\u5c55\u5f00&#xff0c;\u5e0c\u671b\u80fd\u4e3a\u4f60\u5e26\u6765\u4e00\u4e9b\u542f\u53d1\u6216\u5b9e\u7528\u7684\u53c2\u8003\u3002 &#x1f331; \u65e0\u8bba\u4f60\u662f\u521a\u5165\u95e8\u7684\u65b0\u624b&#xff0c;\u8fd8\u662f\u6b63\u5728\u8fdb\u9636\u7684\u5f00\u53d1\u8005&#xff0c;\u5e0c\u671b\u4f60\u90fd\u80fd\u6709\u6240\u6536\u83b7&#xff01;<\/p>\n<hr \/>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>Java \u4e2d\u95f4\u4ef6&#xff1a;Elasticsearch \u805a\u5408\u67e5\u8be2&#xff08;Terms\/Max\/Min \u805a\u5408&#xff09; &#x1f4ca;<\/li>\n<li>\n<ul>\n<li>\u4ec0\u4e48\u662f Elasticsearch \u805a\u5408&#xff1f;&#x1f50d;<\/li>\n<li>\u51c6\u5907\u5de5\u4f5c&#xff1a;\u73af\u5883\u642d\u5efa\u4e0e\u4f9d\u8d56\u914d\u7f6e \u2699\ufe0f<\/li>\n<li>\n<ul>\n<li>1. Elasticsearch \u670d\u52a1<\/li>\n<li>2. Java \u9879\u76ee\u4f9d\u8d56<\/li>\n<li>\n<ul>\n<li>\u65b9\u6848\u4e00&#xff1a;\u4f7f\u7528 High Level REST Client&#xff08;\u9002\u7528\u4e8e 7.x&#xff09;<\/li>\n<li>\u65b9\u6848\u4e8c&#xff1a;\u4f7f\u7528\u65b0\u7248 Java API Client&#xff08;\u63a8\u8350\u7528\u4e8e 8.x&#xff09;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u6570\u636e\u6a21\u578b\u8bbe\u8ba1&#xff1a;\u6a21\u62df\u7535\u5546\u8ba2\u5355 &#x1f6d2;<\/li>\n<li>\n<ul>\n<li>\u521b\u5efa\u7d22\u5f15&#xff08;Java API Client \u793a\u4f8b&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>Terms \u805a\u5408&#xff1a;\u6309\u7c7b\u522b\u5206\u7ec4\u7edf\u8ba1 &#x1f4e6;<\/li>\n<li>\n<ul>\n<li>\u805a\u5408\u539f\u7406<\/li>\n<li>Java \u5b9e\u73b0&#xff08;Java API Client&#xff09;<\/li>\n<li>\u8f93\u51fa\u7ed3\u679c<\/li>\n<li>\u9ad8\u7ea7\u7528\u6cd5&#xff1a;\u6392\u5e8f\u4e0e\u5927\u5c0f\u63a7\u5236<\/li>\n<\/ul>\n<\/li>\n<li>Max\/Min \u805a\u5408&#xff1a;\u6c42\u6781\u503c &#x1f4c8;<\/li>\n<li>\n<ul>\n<li>\u573a\u666f\u793a\u4f8b<\/li>\n<li>Java \u5b9e\u73b0&#xff08;\u5355\u72ec\u4f7f\u7528&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>\u7ec4\u5408\u805a\u5408&#xff1a;Terms &#043; Max\/Min&#xff08;\u5b50\u805a\u5408&#xff09;&#x1f517;<\/li>\n<li>\n<ul>\n<li>\u805a\u5408\u7ed3\u6784\u56fe\u89e3<\/li>\n<li>Java \u5b9e\u73b0&#xff08;\u5b50\u805a\u5408&#xff09;<\/li>\n<li>\u8f93\u51fa\u7ed3\u679c<\/li>\n<\/ul>\n<\/li>\n<li>\u4f7f\u7528 High Level REST Client \u7684\u5b9e\u73b0&#xff08;\u517c\u5bb9 7.x&#xff09;&#x1f504;<\/li>\n<li>\u6027\u80fd\u4f18\u5316\u4e0e\u6ce8\u610f\u4e8b\u9879 \u26a1<\/li>\n<li>\n<ul>\n<li>1. \u907f\u514d\u9ad8\u57fa\u6570\u5b57\u6bb5\u7684 Terms \u805a\u5408<\/li>\n<li>2. \u5408\u7406\u8bbe\u7f6e &#096;size&#096;<\/li>\n<li>3. \u4f7f\u7528 &#096;docvalue_fields&#096; \u63d0\u5347\u6027\u80fd<\/li>\n<li>4. \u907f\u514d\u5728 Text \u5b57\u6bb5\u4e0a\u805a\u5408<\/li>\n<li>5. \u76d1\u63a7\u805a\u5408\u8017\u65f6<\/li>\n<\/ul>\n<\/li>\n<li>\u5b9e\u9645\u5e94\u7528\u573a\u666f\u4e3e\u4f8b &#x1f30d;<\/li>\n<li>\n<ul>\n<li>\u573a\u666f\u4e00&#xff1a;\u7528\u6237\u884c\u4e3a\u5206\u6790<\/li>\n<li>\u573a\u666f\u4e8c&#xff1a;IoT \u8bbe\u5907\u76d1\u63a7<\/li>\n<li>\u573a\u666f\u4e09&#xff1a;\u91d1\u878d\u98ce\u63a7<\/li>\n<\/ul>\n<\/li>\n<li>\u9519\u8bef\u6392\u67e5\u4e0e\u5e38\u89c1\u95ee\u9898 \u274c<\/li>\n<li>\n<ul>\n<li>Q1: \u805a\u5408\u8fd4\u56de\u7a7a\u7ed3\u679c&#xff1f;<\/li>\n<li>Q2: Max\/Min \u8fd4\u56de null&#xff1f;<\/li>\n<li>Q3: Terms \u805a\u5408\u7ed3\u679c\u4e0d\u5168&#xff1f;<\/li>\n<li>Q4: \u5ba2\u6237\u7aef\u62a5 &#096;CoercionException&#096;&#xff1f;<\/li>\n<\/ul>\n<\/li>\n<li>\u6269\u5c55&#xff1a;\u4e0e\u5176\u4ed6\u805a\u5408\u7ec4\u5408\u4f7f\u7528 &#x1f9e9;<\/li>\n<li>\u603b\u7ed3\u4e0e\u5c55\u671b &#x1f3af;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Java \u4e2d\u95f4\u4ef6&#xff1a;Elasticsearch \u805a\u5408\u67e5\u8be2&#xff08;Terms\/Max\/Min \u805a\u5408&#xff09; &#x1f4ca;<\/h2>\n<p>\u5728\u73b0\u4ee3\u5206\u5e03\u5f0f\u7cfb\u7edf\u548c\u5927\u6570\u636e\u5e94\u7528\u4e2d&#xff0c;Elasticsearch \u5df2\u7ecf\u6210\u4e3a\u4e0d\u53ef\u6216\u7f3a\u7684\u641c\u7d22\u4e0e\u5206\u6790\u5f15\u64ce\u3002\u5b83\u4e0d\u4ec5\u63d0\u4f9b\u5f3a\u5927\u7684\u5168\u6587\u68c0\u7d22\u80fd\u529b&#xff0c;\u8fd8\u901a\u8fc7\u5176\u7075\u6d3b\u800c\u9ad8\u6548\u7684\u805a\u5408&#xff08;Aggregation&#xff09;\u529f\u80fd&#xff0c;\u652f\u6301\u5bf9\u6d77\u91cf\u6570\u636e\u8fdb\u884c\u591a\u7ef4\u5ea6\u7edf\u8ba1\u3001\u5206\u7ec4\u3001\u6307\u6807\u8ba1\u7b97\u7b49\u64cd\u4f5c\u3002\u5bf9\u4e8e Java \u5f00\u53d1\u8005\u800c\u8a00&#xff0c;\u638c\u63e1 Elasticsearch \u7684\u805a\u5408\u67e5\u8be2\u673a\u5236&#xff0c;\u5c24\u5176\u662f Terms \u805a\u5408\u3001Max \u805a\u5408 \u548c Min \u805a\u5408&#xff0c;\u662f\u6784\u5efa\u9ad8\u6027\u80fd\u6570\u636e\u5206\u6790\u5e73\u53f0\u7684\u5173\u952e\u6280\u80fd\u3002<\/p>\n<p>\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8 Elasticsearch \u805a\u5408\u67e5\u8be2\u7684\u6838\u5fc3\u6982\u5ff5&#xff0c;\u5e76\u7ed3\u5408 Java \u5ba2\u6237\u7aef&#xff08;High Level REST Client \u53ca\u65b0\u7248 Java API Client&#xff09;\u63d0\u4f9b\u5b8c\u6574\u7684\u4ee3\u7801\u793a\u4f8b&#xff0c;\u5e2e\u52a9\u4f60\u4ece\u96f6\u5f00\u59cb\u7406\u89e3\u5e76\u5b9e\u73b0\u8fd9\u4e9b\u805a\u5408\u64cd\u4f5c\u3002\u65e0\u8bba\u4f60\u662f\u521d\u5b66\u8005\u8fd8\u662f\u6709\u4e00\u5b9a\u7ecf\u9a8c\u7684\u5f00\u53d1\u8005&#xff0c;\u90fd\u80fd\u4ece\u4e2d\u83b7\u5f97\u5b9e\u7528\u7684\u77e5\u8bc6\u548c\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n<hr \/>\n<h3>\u4ec0\u4e48\u662f Elasticsearch \u805a\u5408&#xff1f;&#x1f50d;<\/h3>\n<p>Elasticsearch \u805a\u5408\u662f\u4e00\u79cd\u5bf9\u641c\u7d22\u7ed3\u679c\u8fdb\u884c\u5206\u7ec4\u3001\u7edf\u8ba1\u548c\u5206\u6790\u7684\u673a\u5236\u3002\u5b83\u7c7b\u4f3c\u4e8e SQL \u4e2d\u7684 GROUP BY\u3001MAX()\u3001MIN() \u7b49\u64cd\u4f5c&#xff0c;\u4f46\u529f\u80fd\u66f4\u5f3a\u5927\u3001\u6027\u80fd\u66f4\u9ad8&#xff0c;\u5c24\u5176\u9002\u5408\u5904\u7406\u975e\u7ed3\u6784\u5316\u6216\u534a\u7ed3\u6784\u5316\u6570\u636e\u3002<\/p>\n<p>\u805a\u5408\u5206\u4e3a\u4e09\u5927\u7c7b&#xff1a;<\/p>\n<li>Bucket Aggregations&#xff08;\u6876\u805a\u5408&#xff09;&#xff1a;\u5c06\u6587\u6863\u5206\u7ec4\u5230\u4e0d\u540c\u7684\u201c\u6876\u201d\u4e2d&#xff0c;\u5982\u6309\u5b57\u6bb5\u503c\u5206\u7ec4&#xff08;Terms&#xff09;\u3001\u6309\u6570\u503c\u8303\u56f4\u5206\u7ec4&#xff08;Range&#xff09;\u3001\u6309\u65f6\u95f4\u95f4\u9694\u5206\u7ec4&#xff08;Date Histogram&#xff09;\u7b49\u3002<\/li>\n<li>Metric Aggregations&#xff08;\u6307\u6807\u805a\u5408&#xff09;&#xff1a;\u5bf9\u6587\u6863\u4e2d\u7684\u6570\u503c\u5b57\u6bb5\u8fdb\u884c\u8ba1\u7b97&#xff0c;\u5982\u6c42\u6700\u5927\u503c&#xff08;Max&#xff09;\u3001\u6700\u5c0f\u503c&#xff08;Min&#xff09;\u3001\u5e73\u5747\u503c&#xff08;Avg&#xff09;\u3001\u603b\u548c&#xff08;Sum&#xff09;\u7b49\u3002<\/li>\n<li>Pipeline Aggregations&#xff08;\u7ba1\u9053\u805a\u5408&#xff09;&#xff1a;\u5bf9\u5176\u4ed6\u805a\u5408\u7684\u7ed3\u679c\u8fdb\u884c\u4e8c\u6b21\u8ba1\u7b97&#xff0c;\u5982\u79fb\u52a8\u5e73\u5747\u3001\u5bfc\u6570\u7b49\u3002<\/li>\n<p>\u672c\u6587\u91cd\u70b9\u805a\u7126\u4e8e Terms&#xff08;\u6876\u805a\u5408&#xff09; \u4e0e Max\/Min&#xff08;\u6307\u6807\u805a\u5408&#xff09; \u7684\u7ec4\u5408\u4f7f\u7528&#xff0c;\u8fd9\u662f\u5b9e\u9645\u4e1a\u52a1\u4e2d\u6700\u5e38\u89c1\u7684\u573a\u666f\u4e4b\u4e00\u3002<\/p>\n<p>&#x1f4a1; \u5c0f\u77e5\u8bc6&#xff1a;\u805a\u5408\u64cd\u4f5c\u662f\u5728\u67e5\u8be2\u9636\u6bb5\u4e4b\u540e\u6267\u884c\u7684&#xff0c;\u56e0\u6b64\u4f60\u53ef\u4ee5\u5148\u901a\u8fc7 query \u8fc7\u6ee4\u51fa\u611f\u5174\u8da3\u7684\u6587\u6863&#xff0c;\u518d\u5bf9\u8fd9\u4e9b\u6587\u6863\u8fdb\u884c\u805a\u5408\u5206\u6790\u3002<\/p>\n<hr \/>\n<h3>\u51c6\u5907\u5de5\u4f5c&#xff1a;\u73af\u5883\u642d\u5efa\u4e0e\u4f9d\u8d56\u914d\u7f6e \u2699\ufe0f<\/h3>\n<p>\u5728\u5f00\u59cb\u7f16\u7801\u524d&#xff0c;\u6211\u4eec\u9700\u8981\u786e\u4fdd\u5f00\u53d1\u73af\u5883\u5df2\u6b63\u786e\u914d\u7f6e\u3002<\/p>\n<h4>1. Elasticsearch \u670d\u52a1<\/h4>\n<p>\u9996\u5148&#xff0c;\u786e\u4fdd\u672c\u5730\u6216\u8fdc\u7a0b\u5df2\u8fd0\u884c Elasticsearch \u670d\u52a1&#xff08;\u5efa\u8bae 7.x \u6216 8.x \u7248\u672c&#xff09;\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u68c0\u67e5\u670d\u52a1\u662f\u5426\u6b63\u5e38&#xff1a;<\/p>\n<p><span class=\"token function\">curl<\/span> http:\/\/localhost:9200<\/p>\n<p>\u5e94\u8fd4\u56de\u7c7b\u4f3c\u5982\u4e0b JSON \u54cd\u5e94&#xff1a;<\/p>\n<p><span class=\"token punctuation\">{<\/span><br \/>\n  <span class=\"token string-property property\">&#034;name&#034;<\/span> <span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;node-1&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string-property property\">&#034;cluster_name&#034;<\/span> <span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;elasticsearch&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token string-property property\">&#034;version&#034;<\/span> <span class=\"token operator\">:<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token string-property property\">&#034;number&#034;<\/span> <span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;8.9.0&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token operator\">&#8230;<\/span><br \/>\n  <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>2. Java \u9879\u76ee\u4f9d\u8d56<\/h4>\n<p>\u6211\u4eec\u4ee5 Maven \u9879\u76ee\u4e3a\u4f8b\u3002\u6839\u636e\u4f60\u4f7f\u7528\u7684 Elasticsearch \u7248\u672c&#xff0c;\u9009\u62e9\u5bf9\u5e94\u7684\u5ba2\u6237\u7aef&#xff1a;<\/p>\n<h5>\u65b9\u6848\u4e00&#xff1a;\u4f7f\u7528 High Level REST Client&#xff08;\u9002\u7528\u4e8e 7.x&#xff09;<\/h5>\n<p>\u26a0\ufe0f \u6ce8\u610f&#xff1a;Elasticsearch \u5b98\u65b9\u5df2\u5728 8.0 \u540e\u5f03\u7528 High Level REST Client&#xff0c;\u63a8\u8350\u65b0\u9879\u76ee\u4f7f\u7528 Java API Client\u3002<\/p>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>dependency<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>groupId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>org.elasticsearch.client<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>groupId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>artifactId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>elasticsearch-rest-high-level-client<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>artifactId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>version<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>7.17.10<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>version<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>dependency<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<h5>\u65b9\u6848\u4e8c&#xff1a;\u4f7f\u7528\u65b0\u7248 Java API Client&#xff08;\u63a8\u8350\u7528\u4e8e 8.x&#xff09;<\/h5>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>dependency<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>groupId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>co.elastic.clients<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>groupId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>artifactId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>elasticsearch-java<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>artifactId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>version<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>8.9.0<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>version<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>dependency<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>dependency<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>groupId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>com.fasterxml.jackson.core<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>groupId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>artifactId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>jackson-databind<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>artifactId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>version<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>2.15.2<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>version<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>dependency<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>&#x1f517; \u5b98\u65b9\u6587\u6863\u53c2\u8003&#xff1a;Elasticsearch Java API Client<\/p>\n<p>\u672c\u6587\u5c06\u540c\u65f6\u63d0\u4f9b\u4e24\u79cd\u5ba2\u6237\u7aef\u7684\u4ee3\u7801\u793a\u4f8b&#xff0c;\u4f46\u91cd\u70b9\u8bb2\u89e3\u65b0\u7248 Java API Client&#xff0c;\u56e0\u5176\u66f4\u73b0\u4ee3\u3001\u7c7b\u578b\u5b89\u5168\u4e14\u9762\u5411\u672a\u6765\u3002<\/p>\n<hr \/>\n<h3>\u6570\u636e\u6a21\u578b\u8bbe\u8ba1&#xff1a;\u6a21\u62df\u7535\u5546\u8ba2\u5355 &#x1f6d2;<\/h3>\n<p>\u4e3a\u4e86\u6f14\u793a\u805a\u5408\u67e5\u8be2&#xff0c;\u6211\u4eec\u8bbe\u8ba1\u4e00\u4e2a\u7b80\u5355\u7684\u7535\u5546\u8ba2\u5355\u7d22\u5f15 orders&#xff0c;\u5305\u542b\u4ee5\u4e0b\u5b57\u6bb5&#xff1a;<\/p>\n<table>\n<tr>\u5b57\u6bb5\u540d\u7c7b\u578b\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>orderId<\/td>\n<td>keyword<\/td>\n<td>\u8ba2\u5355 ID<\/td>\n<\/tr>\n<tr>\n<td>customerId<\/td>\n<td>keyword<\/td>\n<td>\u5ba2\u6237 ID<\/td>\n<\/tr>\n<tr>\n<td>productName<\/td>\n<td>text \/ keyword<\/td>\n<td>\u5546\u54c1\u540d\u79f0<\/td>\n<\/tr>\n<tr>\n<td>category<\/td>\n<td>keyword<\/td>\n<td>\u5546\u54c1\u7c7b\u522b&#xff08;\u5982 \u201cElectronics\u201d, \u201cBooks\u201d&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>price<\/td>\n<td>double<\/td>\n<td>\u5546\u54c1\u4ef7\u683c<\/td>\n<\/tr>\n<tr>\n<td>orderDate<\/td>\n<td>date<\/td>\n<td>\u4e0b\u5355\u65f6\u95f4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6211\u4eec\u5c06\u63d2\u5165\u51e0\u6761\u6d4b\u8bd5\u6570\u636e&#xff1a;<\/p>\n<p><span class=\"token punctuation\">{<\/span> <span class=\"token string-property property\">&#034;orderId&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;O001&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;customerId&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;C100&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;productName&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;iPhone 14&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;category&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;Electronics&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;price&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">999.0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;orderDate&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;2023-10-01T10:00:00Z&#034;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token string-property property\">&#034;orderId&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;O002&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;customerId&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;C101&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;productName&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;MacBook Pro&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;category&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;Electronics&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;price&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">2499.0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;orderDate&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;2023-10-02T11:30:00Z&#034;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token string-property property\">&#034;orderId&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;O003&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;customerId&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;C100&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;productName&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;Effective Java&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;category&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;Books&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;price&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">45.0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;orderDate&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;2023-10-03T09:15:00Z&#034;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token string-property property\">&#034;orderId&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;O004&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;customerId&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;C102&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;productName&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;iPad Air&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;category&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;Electronics&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;price&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">599.0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;orderDate&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;2023-10-04T14:20:00Z&#034;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">{<\/span> <span class=\"token string-property property\">&#034;orderId&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;O005&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;customerId&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;C101&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;productName&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;Clean Code&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;category&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;Books&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;price&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token number\">40.0<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string-property property\">&#034;orderDate&#034;<\/span><span class=\"token operator\">:<\/span> <span class=\"token string\">&#034;2023-10-05T16:45:00Z&#034;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u521b\u5efa\u7d22\u5f15&#xff08;Java API Client \u793a\u4f8b&#xff09;<\/h4>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token namespace\">co<span class=\"token punctuation\">.<\/span>elastic<span class=\"token punctuation\">.<\/span>clients<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">ElasticsearchClient<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">co<span class=\"token punctuation\">.<\/span>elastic<span class=\"token punctuation\">.<\/span>clients<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>indices<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">CreateIndexRequest<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">co<span class=\"token punctuation\">.<\/span>elastic<span class=\"token punctuation\">.<\/span>clients<span class=\"token punctuation\">.<\/span>transport<span class=\"token punctuation\">.<\/span>endpoints<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">BooleanResponse<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">createOrdersIndex<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ElasticsearchClient<\/span> client<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">BooleanResponse<\/span> response <span class=\"token operator\">&#061;<\/span> client<span class=\"token punctuation\">.<\/span><span class=\"token function\">indices<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">create<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        <span class=\"token class-name\">CreateIndexRequest<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">of<\/span><span class=\"token punctuation\">(<\/span>c <span class=\"token operator\">-&gt;<\/span> c<br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">index<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;orders&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">mappings<\/span><span class=\"token punctuation\">(<\/span>m <span class=\"token operator\">-&gt;<\/span> m<br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">properties<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;orderId&#034;<\/span><span class=\"token punctuation\">,<\/span> p <span class=\"token operator\">-&gt;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">keyword<\/span><span class=\"token punctuation\">(<\/span>k <span class=\"token operator\">-&gt;<\/span> k<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">properties<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;customerId&#034;<\/span><span class=\"token punctuation\">,<\/span> p <span class=\"token operator\">-&gt;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">keyword<\/span><span class=\"token punctuation\">(<\/span>k <span class=\"token operator\">-&gt;<\/span> k<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">properties<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;productName&#034;<\/span><span class=\"token punctuation\">,<\/span> p <span class=\"token operator\">-&gt;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">text<\/span><span class=\"token punctuation\">(<\/span>t <span class=\"token operator\">-&gt;<\/span> t<span class=\"token punctuation\">.<\/span><span class=\"token function\">fields<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;keyword&#034;<\/span><span class=\"token punctuation\">,<\/span> f <span class=\"token operator\">-&gt;<\/span> f<span class=\"token punctuation\">.<\/span><span class=\"token function\">keyword<\/span><span class=\"token punctuation\">(<\/span>k <span class=\"token operator\">-&gt;<\/span> k<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">properties<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;category&#034;<\/span><span class=\"token punctuation\">,<\/span> p <span class=\"token operator\">-&gt;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">keyword<\/span><span class=\"token punctuation\">(<\/span>k <span class=\"token operator\">-&gt;<\/span> k<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">properties<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">,<\/span> p <span class=\"token operator\">-&gt;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">double_<\/span><span class=\"token punctuation\">(<\/span>d <span class=\"token operator\">-&gt;<\/span> d<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">properties<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;orderDate&#034;<\/span><span class=\"token punctuation\">,<\/span> p <span class=\"token operator\">-&gt;<\/span> p<span class=\"token punctuation\">.<\/span><span class=\"token function\">date<\/span><span class=\"token punctuation\">(<\/span>d <span class=\"token operator\">-&gt;<\/span> d<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Index created: &#034;<\/span> <span class=\"token operator\">&#043;<\/span> response<span class=\"token punctuation\">.<\/span><span class=\"token function\">acknowledged<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<h3>Terms \u805a\u5408&#xff1a;\u6309\u7c7b\u522b\u5206\u7ec4\u7edf\u8ba1 &#x1f4e6;<\/h3>\n<p>Terms \u805a\u5408\u662f\u6700\u5e38\u7528\u7684\u6876\u805a\u5408&#xff0c;\u5b83\u6839\u636e\u5b57\u6bb5\u7684\u552f\u4e00\u503c\u5bf9\u6587\u6863\u8fdb\u884c\u5206\u7ec4\u3002\u4f8b\u5982&#xff0c;\u6211\u4eec\u53ef\u4ee5\u6309 category \u5b57\u6bb5\u5c06\u8ba2\u5355\u5206\u4e3a \u201cElectronics\u201d \u548c \u201cBooks\u201d \u4e24\u7c7b\u3002<\/p>\n<h4>\u805a\u5408\u539f\u7406<\/h4>\n<p>Terms \u805a\u5408\u4f1a\u904d\u5386\u6240\u6709\u6587\u6863&#xff0c;\u63d0\u53d6\u6307\u5b9a\u5b57\u6bb5\u7684\u503c&#xff0c;\u7136\u540e\u5c06\u76f8\u540c\u503c\u7684\u6587\u6863\u5f52\u5165\u540c\u4e00\u4e2a\u201c\u6876\u201d\u3002\u6bcf\u4e2a\u6876\u5305\u542b&#xff1a;<\/p>\n<ul>\n<li>key&#xff1a;\u5b57\u6bb5\u503c&#xff08;\u5982 \u201cElectronics\u201d&#xff09;<\/li>\n<li>doc_count&#xff1a;\u8be5\u503c\u51fa\u73b0\u7684\u6587\u6863\u6570\u91cf<\/li>\n<\/ul>\n<h4>Java \u5b9e\u73b0&#xff08;Java API Client&#xff09;<\/h4>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token namespace\">co<span class=\"token punctuation\">.<\/span>elastic<span class=\"token punctuation\">.<\/span>clients<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span><\/span>_types<span class=\"token punctuation\">.<\/span>aggregations<span class=\"token punctuation\">.<\/span>TermsAggregation<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">co<span class=\"token punctuation\">.<\/span>elastic<span class=\"token punctuation\">.<\/span>clients<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>core<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">SearchRequest<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">co<span class=\"token punctuation\">.<\/span>elastic<span class=\"token punctuation\">.<\/span>clients<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>core<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">SearchResponse<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">co<span class=\"token punctuation\">.<\/span>elastic<span class=\"token punctuation\">.<\/span>clients<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span><\/span>_types<span class=\"token punctuation\">.<\/span>aggregations<span class=\"token punctuation\">.<\/span>StringTermsBucket<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">termsAggregationByCategory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ElasticsearchClient<\/span> client<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">SearchRequest<\/span> request <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">SearchRequest<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">of<\/span><span class=\"token punctuation\">(<\/span>s <span class=\"token operator\">-&gt;<\/span> s<br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">index<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;orders&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ \u4e0d\u8fd4\u56de\u5177\u4f53\u6587\u6863&#xff0c;\u53ea\u8fd4\u56de\u805a\u5408\u7ed3\u679c<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;categories&#034;<\/span><span class=\"token punctuation\">,<\/span> a <span class=\"token operator\">-&gt;<\/span> a<br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">terms<\/span><span class=\"token punctuation\">(<\/span>t <span class=\"token operator\">-&gt;<\/span> t<br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;category&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ \u6700\u591a\u8fd4\u56de10\u4e2a\u6876<\/span><br \/>\n            <span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">SearchResponse<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Void<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> response <span class=\"token operator\">&#061;<\/span> client<span class=\"token punctuation\">.<\/span><span class=\"token function\">search<\/span><span class=\"token punctuation\">(<\/span>request<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Void<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">var<\/span> categories <span class=\"token operator\">&#061;<\/span> response<span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;categories&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">sterms<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">StringTermsBucket<\/span> bucket <span class=\"token operator\">:<\/span> categories<span class=\"token punctuation\">.<\/span><span class=\"token function\">buckets<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">array<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Category: &#034;<\/span> <span class=\"token operator\">&#043;<\/span> bucket<span class=\"token punctuation\">.<\/span><span class=\"token function\">key<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;, Count: &#034;<\/span> <span class=\"token operator\">&#043;<\/span> bucket<span class=\"token punctuation\">.<\/span><span class=\"token function\">docCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u8f93\u51fa\u7ed3\u679c<\/h4>\n<p>Category: Electronics, Count: 3<br \/>\nCategory: Books, Count: 2<\/p>\n<h4>\u9ad8\u7ea7\u7528\u6cd5&#xff1a;\u6392\u5e8f\u4e0e\u5927\u5c0f\u63a7\u5236<\/h4>\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b&#xff0c;Terms \u805a\u5408\u6309 doc_count \u964d\u5e8f\u6392\u5217\u3002\u4f60\u4e5f\u53ef\u4ee5\u6309\u5b57\u6bcd\u987a\u5e8f\u6392\u5e8f&#xff1a;<\/p>\n<p><span class=\"token punctuation\">.<\/span><span class=\"token function\">terms<\/span><span class=\"token punctuation\">(<\/span>t <span class=\"token operator\">-&gt;<\/span> t<br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;category&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token function\">order<\/span><span class=\"token punctuation\">(<\/span>o <span class=\"token operator\">-&gt;<\/span> o<span class=\"token punctuation\">.<\/span><span class=\"token function\">key<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">SortOrder<span class=\"token punctuation\">.<\/span>Asc<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ \u6309 key \u5347\u5e8f<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<p>&#x1f4cc; \u6ce8\u610f&#xff1a;size \u53c2\u6570\u63a7\u5236\u8fd4\u56de\u7684\u6876\u6570\u91cf&#xff0c;\u9ed8\u8ba4\u4e3a 10\u3002\u82e5\u9700\u8fd4\u56de\u66f4\u591a&#xff0c;\u53ef\u589e\u5927\u8be5\u503c&#xff0c;\u4f46\u4f1a\u5f71\u54cd\u6027\u80fd\u3002<\/p>\n<hr \/>\n<h3>Max\/Min \u805a\u5408&#xff1a;\u6c42\u6781\u503c &#x1f4c8;<\/h3>\n<p>Max \u805a\u5408\u548c Min \u805a\u5408\u5c5e\u4e8e\u6307\u6807\u805a\u5408&#xff0c;\u7528\u4e8e\u8ba1\u7b97\u6570\u503c\u5b57\u6bb5\u7684\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\u3002<\/p>\n<h4>\u573a\u666f\u793a\u4f8b<\/h4>\n<ul>\n<li>\u627e\u51fa\u6700\u8d35\u7684\u5546\u54c1&#xff08;Max price&#xff09;<\/li>\n<li>\u627e\u51fa\u6700\u4fbf\u5b9c\u7684\u5546\u54c1&#xff08;Min price&#xff09;<\/li>\n<\/ul>\n<h4>Java \u5b9e\u73b0&#xff08;\u5355\u72ec\u4f7f\u7528&#xff09;<\/h4>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">maxMinPriceAggregation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ElasticsearchClient<\/span> client<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">SearchRequest<\/span> request <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">SearchRequest<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">of<\/span><span class=\"token punctuation\">(<\/span>s <span class=\"token operator\">-&gt;<\/span> s<br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">index<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;orders&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;max_price&#034;<\/span><span class=\"token punctuation\">,<\/span> a <span class=\"token operator\">-&gt;<\/span> a<span class=\"token punctuation\">.<\/span><span class=\"token function\">max<\/span><span class=\"token punctuation\">(<\/span>m <span class=\"token operator\">-&gt;<\/span> m<span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;min_price&#034;<\/span><span class=\"token punctuation\">,<\/span> a <span class=\"token operator\">-&gt;<\/span> a<span class=\"token punctuation\">.<\/span><span class=\"token function\">min<\/span><span class=\"token punctuation\">(<\/span>m <span class=\"token operator\">-&gt;<\/span> m<span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">SearchResponse<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Void<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> response <span class=\"token operator\">&#061;<\/span> client<span class=\"token punctuation\">.<\/span><span class=\"token function\">search<\/span><span class=\"token punctuation\">(<\/span>request<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Void<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">Double<\/span> maxPrice <span class=\"token operator\">&#061;<\/span> response<span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;max_price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">value<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">Double<\/span> minPrice <span class=\"token operator\">&#061;<\/span> response<span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;min_price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">min<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">value<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Max Price: &#034;<\/span> <span class=\"token operator\">&#043;<\/span> maxPrice<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 2499.0<\/span><br \/>\n    <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Min Price: &#034;<\/span> <span class=\"token operator\">&#043;<\/span> minPrice<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ 40.0<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<h3>\u7ec4\u5408\u805a\u5408&#xff1a;Terms &#043; Max\/Min&#xff08;\u5b50\u805a\u5408&#xff09;&#x1f517;<\/h3>\n<p>\u771f\u5b9e\u4e1a\u52a1\u4e2d&#xff0c;\u6211\u4eec\u5f80\u5f80\u9700\u8981\u5728\u5206\u7ec4\u7684\u57fa\u7840\u4e0a\u8ba1\u7b97\u6bcf\u7ec4\u7684\u6781\u503c\u3002\u4f8b\u5982&#xff1a;<\/p>\n<p>\u201c\u6bcf\u4e2a\u5546\u54c1\u7c7b\u522b\u7684\u6700\u9ad8\u4ef7\u683c\u548c\u6700\u4f4e\u4ef7\u683c\u662f\u591a\u5c11&#xff1f;\u201d<\/p>\n<p>\u8fd9\u5c31\u9700\u8981\u7528\u5230 \u5b50\u805a\u5408&#xff08;Sub-Aggregation&#xff09;&#xff1a;\u5728 Terms \u805a\u5408\u7684\u6bcf\u4e2a\u6876\u5185&#xff0c;\u518d\u5d4c\u5957 Max \u548c Min \u805a\u5408\u3002<\/p>\n<h4>\u805a\u5408\u7ed3\u6784\u56fe\u89e3<\/h4>\n<p>  #mermaid-svg-koIivI0Ga7JlZ3pK{font-family:\\&#8221;trebuchet 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.flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-koIivI0Ga7JlZ3pK rect.text{fill:none;stroke-width:0;}#mermaid-svg-koIivI0Ga7JlZ3pK .icon-shape,#mermaid-svg-koIivI0Ga7JlZ3pK .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-koIivI0Ga7JlZ3pK .icon-shape p,#mermaid-svg-koIivI0Ga7JlZ3pK .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-koIivI0Ga7JlZ3pK .icon-shape rect,#mermaid-svg-koIivI0Ga7JlZ3pK .image-shape rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-koIivI0Ga7JlZ3pK .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-koIivI0Ga7JlZ3pK .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-koIivI0Ga7JlZ3pK :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Search Query<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Terms Aggregation on &#039;category&#039;<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Bucket: Electronics<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Bucket: Books<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Max Aggregation on &#039;price&#039;<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Min Aggregation on &#039;price&#039;<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Max Aggregation on &#039;price&#039;<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Min Aggregation on &#039;price&#039;<\/p>\n<p><\/span><\/p>\n<h4>Java \u5b9e\u73b0&#xff08;\u5b50\u805a\u5408&#xff09;<\/h4>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">termsWithMaxMinAggregation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">ElasticsearchClient<\/span> client<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">SearchRequest<\/span> request <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">SearchRequest<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">of<\/span><span class=\"token punctuation\">(<\/span>s <span class=\"token operator\">-&gt;<\/span> s<br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">index<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;orders&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;categories&#034;<\/span><span class=\"token punctuation\">,<\/span> a <span class=\"token operator\">-&gt;<\/span> a<br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">terms<\/span><span class=\"token punctuation\">(<\/span>t <span class=\"token operator\">-&gt;<\/span> t<span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;category&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;max_price&#034;<\/span><span class=\"token punctuation\">,<\/span> aa <span class=\"token operator\">-&gt;<\/span> aa<span class=\"token punctuation\">.<\/span><span class=\"token function\">max<\/span><span class=\"token punctuation\">(<\/span>m <span class=\"token operator\">-&gt;<\/span> m<span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;min_price&#034;<\/span><span class=\"token punctuation\">,<\/span> aa <span class=\"token operator\">-&gt;<\/span> aa<span class=\"token punctuation\">.<\/span><span class=\"token function\">min<\/span><span class=\"token punctuation\">(<\/span>m <span class=\"token operator\">-&gt;<\/span> m<span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">SearchResponse<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">Void<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> response <span class=\"token operator\">&#061;<\/span> client<span class=\"token punctuation\">.<\/span><span class=\"token function\">search<\/span><span class=\"token punctuation\">(<\/span>request<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Void<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">var<\/span> categories <span class=\"token operator\">&#061;<\/span> response<span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;categories&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">sterms<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">StringTermsBucket<\/span> bucket <span class=\"token operator\">:<\/span> categories<span class=\"token punctuation\">.<\/span><span class=\"token function\">buckets<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">array<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> category <span class=\"token operator\">&#061;<\/span> bucket<span class=\"token punctuation\">.<\/span><span class=\"token function\">key<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Double<\/span> maxPrice <span class=\"token operator\">&#061;<\/span> bucket<span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;max_price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">value<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Double<\/span> minPrice <span class=\"token operator\">&#061;<\/span> bucket<span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;min_price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">min<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">value<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Category: %s, Max Price: %.2f, Min Price: %.2f%n&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                          category<span class=\"token punctuation\">,<\/span> maxPrice<span class=\"token punctuation\">,<\/span> minPrice<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u8f93\u51fa\u7ed3\u679c<\/h4>\n<p>Category: Electronics, Max Price: 2499.00, Min Price: 599.00<br \/>\nCategory: Books, Max Price: 45.00, Min Price: 40.00<\/p>\n<p>\u2705 \u8fd9\u6b63\u662f\u6211\u4eec\u60f3\u8981\u7684&#xff1a;\u6bcf\u4e2a\u7c7b\u522b\u5185\u90e8\u7684\u4ef7\u683c\u6781\u503c\u3002<\/p>\n<hr \/>\n<h3>\u4f7f\u7528 High Level REST Client \u7684\u5b9e\u73b0&#xff08;\u517c\u5bb9 7.x&#xff09;&#x1f504;<\/h3>\n<p>\u867d\u7136\u5b98\u65b9\u63a8\u8350\u4f7f\u7528\u65b0\u7248\u5ba2\u6237\u7aef&#xff0c;\u4f46\u8bb8\u591a\u8001\u9879\u76ee\u4ecd\u5728\u4f7f\u7528 High Level REST Client\u3002\u4ee5\u4e0b\u662f\u7b49\u6548\u5b9e\u73b0&#xff1a;<\/p>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>action<span class=\"token punctuation\">.<\/span>search<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">SearchRequest<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>action<span class=\"token punctuation\">.<\/span>search<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">SearchResponse<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>client<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">RequestOptions<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>client<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">RestHighLevelClient<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>search<span class=\"token punctuation\">.<\/span>aggregations<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">AggregationBuilders<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>search<span class=\"token punctuation\">.<\/span>aggregations<span class=\"token punctuation\">.<\/span>bucket<span class=\"token punctuation\">.<\/span>terms<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Terms<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>search<span class=\"token punctuation\">.<\/span>aggregations<span class=\"token punctuation\">.<\/span>metrics<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Max<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>elasticsearch<span class=\"token punctuation\">.<\/span>search<span class=\"token punctuation\">.<\/span>aggregations<span class=\"token punctuation\">.<\/span>metrics<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Min<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">termsWithMaxMin_HLRC<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">RestHighLevelClient<\/span> client<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">IOException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">SearchRequest<\/span> searchRequest <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">SearchRequest<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;orders&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">SearchSourceBuilder<\/span> sourceBuilder <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">SearchSourceBuilder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    sourceBuilder<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6784\u5efa Terms \u805a\u5408&#xff0c;\u5e76\u6dfb\u52a0\u5b50\u805a\u5408<\/span><br \/>\n    sourceBuilder<span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregation<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        <span class=\"token class-name\">AggregationBuilders<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">terms<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;categories&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;category&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">subAggregation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">AggregationBuilders<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">max<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;max_price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">subAggregation<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">AggregationBuilders<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">min<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;min_price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    searchRequest<span class=\"token punctuation\">.<\/span><span class=\"token function\">source<\/span><span class=\"token punctuation\">(<\/span>sourceBuilder<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">SearchResponse<\/span> response <span class=\"token operator\">&#061;<\/span> client<span class=\"token punctuation\">.<\/span><span class=\"token function\">search<\/span><span class=\"token punctuation\">(<\/span>searchRequest<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">RequestOptions<\/span><span class=\"token punctuation\">.<\/span>DEFAULT<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token class-name\">Terms<\/span> categories <span class=\"token operator\">&#061;<\/span> response<span class=\"token punctuation\">.<\/span><span class=\"token function\">getAggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;categories&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Terms<span class=\"token punctuation\">.<\/span>Bucket<\/span> bucket <span class=\"token operator\">:<\/span> categories<span class=\"token punctuation\">.<\/span><span class=\"token function\">getBuckets<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> category <span class=\"token operator\">&#061;<\/span> bucket<span class=\"token punctuation\">.<\/span><span class=\"token function\">getKeyAsString<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Max<\/span> maxPrice <span class=\"token operator\">&#061;<\/span> bucket<span class=\"token punctuation\">.<\/span><span class=\"token function\">getAggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;max_price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">Min<\/span> minPrice <span class=\"token operator\">&#061;<\/span> bucket<span class=\"token punctuation\">.<\/span><span class=\"token function\">getAggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">get<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;min_price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Category: %s, Max: %.2f, Min: %.2f%n&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                          category<span class=\"token punctuation\">,<\/span> maxPrice<span class=\"token punctuation\">.<\/span><span class=\"token function\">getValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> minPrice<span class=\"token punctuation\">.<\/span><span class=\"token function\">getValue<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>&#x1f517; \u66f4\u591a\u5173\u4e8e High Level REST Client \u7684\u4fe1\u606f&#xff0c;\u8bf7\u53c2\u8003 Elasticsearch 7.x Java REST Client \u6587\u6863<\/p>\n<hr \/>\n<h3>\u6027\u80fd\u4f18\u5316\u4e0e\u6ce8\u610f\u4e8b\u9879 \u26a1<\/h3>\n<p>\u805a\u5408\u67e5\u8be2\u867d\u7136\u5f3a\u5927&#xff0c;\u4f46\u5728\u5927\u6570\u636e\u91cf\u4e0b\u53ef\u80fd\u5e26\u6765\u6027\u80fd\u6311\u6218\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5b9e\u8df5&#xff1a;<\/p>\n<h4>1. \u907f\u514d\u9ad8\u57fa\u6570\u5b57\u6bb5\u7684 Terms \u805a\u5408<\/h4>\n<p>\u5982\u679c\u5bf9 customerId&#xff08;\u5047\u8bbe\u6709\u767e\u4e07\u7ea7\u552f\u4e00\u503c&#xff09;\u505a Terms \u805a\u5408&#xff0c;\u4f1a\u5bfc\u81f4\u5185\u5b58\u7206\u70b8\u3002\u6b64\u65f6\u5e94&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528 composite \u805a\u5408\u8fdb\u884c\u5206\u9875<\/li>\n<li>\u6216\u9650\u5236 size \u5e76\u914d\u5408 include\/exclude \u8fc7\u6ee4<\/li>\n<\/ul>\n<h4>2. \u5408\u7406\u8bbe\u7f6e size<\/h4>\n<p>\u9ed8\u8ba4 size&#061;10&#xff0c;\u82e5\u4e1a\u52a1\u9700\u8981\u66f4\u591a\u6876&#xff0c;\u9010\u6b65\u589e\u52a0&#xff0c;\u907f\u514d\u4e00\u6b21\u6027\u62c9\u53d6\u8fc7\u591a\u3002<\/p>\n<h4>3. \u4f7f\u7528 docvalue_fields \u63d0\u5347\u6027\u80fd<\/h4>\n<p>\u786e\u4fdd\u805a\u5408\u5b57\u6bb5\u542f\u7528\u4e86 doc_values&#xff08;\u9ed8\u8ba4\u5f00\u542f&#xff09;&#xff0c;\u8fd9\u662f\u5217\u5f0f\u5b58\u50a8&#xff0c;\u4e13\u4e3a\u805a\u5408\u4f18\u5316\u3002<\/p>\n<h4>4. \u907f\u514d\u5728 Text \u5b57\u6bb5\u4e0a\u805a\u5408<\/h4>\n<p>Text \u5b57\u6bb5\u7528\u4e8e\u5168\u6587\u68c0\u7d22&#xff0c;\u4e0d\u53ef\u76f4\u63a5\u805a\u5408\u3002\u5e94\u4f7f\u7528 .keyword \u5b50\u5b57\u6bb5&#xff08;\u5982 productName.keyword&#xff09;\u3002<\/p>\n<h4>5. \u76d1\u63a7\u805a\u5408\u8017\u65f6<\/h4>\n<p>\u901a\u8fc7 Kibana \u6216 _nodes\/stats API \u76d1\u63a7\u805a\u5408\u8bf7\u6c42\u7684 CPU \u548c\u5185\u5b58\u4f7f\u7528\u3002<\/p>\n<hr \/>\n<h3>\u5b9e\u9645\u5e94\u7528\u573a\u666f\u4e3e\u4f8b &#x1f30d;<\/h3>\n<h4>\u573a\u666f\u4e00&#xff1a;\u7528\u6237\u884c\u4e3a\u5206\u6790<\/h4>\n<ul>\n<li>\u6309 userType&#xff08;\u666e\u901a\/\u4f1a\u5458&#xff09;\u5206\u7ec4&#xff0c;\u7edf\u8ba1\u6bcf\u6b21\u4f1a\u8bdd\u7684\u6700\u957f\/\u6700\u77ed\u505c\u7559\u65f6\u95f4&#xff08;Max\/Min sessionDuration&#xff09;<\/li>\n<\/ul>\n<h4>\u573a\u666f\u4e8c&#xff1a;IoT \u8bbe\u5907\u76d1\u63a7<\/h4>\n<ul>\n<li>\u6309 deviceId \u5206\u7ec4&#xff0c;\u627e\u51fa\u6bcf\u53f0\u8bbe\u5907\u4eca\u65e5\u7684\u6700\u9ad8\/\u6700\u4f4e\u6e29\u5ea6&#xff08;Max\/Min temperature&#xff09;<\/li>\n<\/ul>\n<h4>\u573a\u666f\u4e09&#xff1a;\u91d1\u878d\u98ce\u63a7<\/h4>\n<ul>\n<li>\u6309 transactionType \u5206\u7ec4&#xff0c;\u8bc6\u522b\u6bcf\u7c7b\u4ea4\u6613\u7684\u6700\u5927\/\u6700\u5c0f\u91d1\u989d&#xff0c;\u7528\u4e8e\u5f02\u5e38\u68c0\u6d4b<\/li>\n<\/ul>\n<p>&#x1f4ca; \u8fd9\u4e9b\u573a\u666f\u90fd\u53ef\u901a\u8fc7 Terms &#043; Max\/Min \u5b50\u805a\u5408 \u4f18\u96c5\u5b9e\u73b0\u3002<\/p>\n<hr \/>\n<h3>\u9519\u8bef\u6392\u67e5\u4e0e\u5e38\u89c1\u95ee\u9898 \u274c<\/h3>\n<h4>Q1: \u805a\u5408\u8fd4\u56de\u7a7a\u7ed3\u679c&#xff1f;<\/h4>\n<ul>\n<li>\u68c0\u67e5\u5b57\u6bb5\u662f\u5426\u5b58\u5728\u4e14\u7c7b\u578b\u6b63\u786e&#xff08;\u5982 price \u662f\u5426\u4e3a double&#xff09;<\/li>\n<li>\u786e\u8ba4\u7d22\u5f15\u4e2d\u6709\u6570\u636e&#xff1a;GET \/orders\/_search<\/li>\n<li>\u786e\u4fdd\u672a\u88ab query \u8fc7\u6ee4\u6389\u6240\u6709\u6587\u6863<\/li>\n<\/ul>\n<h4>Q2: Max\/Min \u8fd4\u56de null&#xff1f;<\/h4>\n<ul>\n<li>\u5b57\u6bb5\u503c\u5168\u4e3a null \u6216 missing<\/li>\n<li>\u5b57\u6bb5\u7c7b\u578b\u4e0d\u5339\u914d&#xff08;\u5982\u5b57\u7b26\u4e32\u65e0\u6cd5\u6c42\u6781\u503c&#xff09;<\/li>\n<\/ul>\n<h4>Q3: Terms \u805a\u5408\u7ed3\u679c\u4e0d\u5168&#xff1f;<\/h4>\n<ul>\n<li>\u9ed8\u8ba4 size&#061;10&#xff0c;\u589e\u52a0 size \u6216\u4f7f\u7528 composite \u805a\u5408\u5206\u9875<\/li>\n<\/ul>\n<h4>Q4: \u5ba2\u6237\u7aef\u62a5 CoercionException&#xff1f;<\/h4>\n<ul>\n<li>\u5b57\u6bb5\u6620\u5c04\u4e0e\u5b9e\u9645\u6570\u636e\u7c7b\u578b\u4e0d\u4e00\u81f4&#xff0c;\u68c0\u67e5 mapping<\/li>\n<\/ul>\n<hr \/>\n<h3>\u6269\u5c55&#xff1a;\u4e0e\u5176\u4ed6\u805a\u5408\u7ec4\u5408\u4f7f\u7528 &#x1f9e9;<\/h3>\n<p>Terms \u805a\u5408\u53ef\u4e0e\u591a\u79cd\u805a\u5408\u7ec4\u5408&#xff0c;\u5f62\u6210\u590d\u6742\u5206\u6790&#xff1a;<\/p>\n<p>  #mermaid-svg-wFfundElaBMd3XJ8{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-wFfundElaBMd3XJ8 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-wFfundElaBMd3XJ8 .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-wFfundElaBMd3XJ8 .error-icon{fill:#552222;}#mermaid-svg-wFfundElaBMd3XJ8 .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-wFfundElaBMd3XJ8 .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-wFfundElaBMd3XJ8 .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-wFfundElaBMd3XJ8 .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-wFfundElaBMd3XJ8 .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-wFfundElaBMd3XJ8 .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-wFfundElaBMd3XJ8 .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-wFfundElaBMd3XJ8 .marker{fill:#333333;stroke:#333333;}#mermaid-svg-wFfundElaBMd3XJ8 .marker.cross{stroke:#333333;}#mermaid-svg-wFfundElaBMd3XJ8 svg{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-wFfundElaBMd3XJ8 p{margin:0;}#mermaid-svg-wFfundElaBMd3XJ8 .label{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;color:#333;}#mermaid-svg-wFfundElaBMd3XJ8 .cluster-label text{fill:#333;}#mermaid-svg-wFfundElaBMd3XJ8 .cluster-label span{color:#333;}#mermaid-svg-wFfundElaBMd3XJ8 .cluster-label span p{background-color:transparent;}#mermaid-svg-wFfundElaBMd3XJ8 .label text,#mermaid-svg-wFfundElaBMd3XJ8 span{fill:#333;color:#333;}#mermaid-svg-wFfundElaBMd3XJ8 .node rect,#mermaid-svg-wFfundElaBMd3XJ8 .node circle,#mermaid-svg-wFfundElaBMd3XJ8 .node ellipse,#mermaid-svg-wFfundElaBMd3XJ8 .node polygon,#mermaid-svg-wFfundElaBMd3XJ8 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-wFfundElaBMd3XJ8 .rough-node .label text,#mermaid-svg-wFfundElaBMd3XJ8 .node .label text,#mermaid-svg-wFfundElaBMd3XJ8 .image-shape .label,#mermaid-svg-wFfundElaBMd3XJ8 .icon-shape .label{text-anchor:middle;}#mermaid-svg-wFfundElaBMd3XJ8 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-wFfundElaBMd3XJ8 .rough-node .label,#mermaid-svg-wFfundElaBMd3XJ8 .node .label,#mermaid-svg-wFfundElaBMd3XJ8 .image-shape .label,#mermaid-svg-wFfundElaBMd3XJ8 .icon-shape .label{text-align:center;}#mermaid-svg-wFfundElaBMd3XJ8 .node.clickable{cursor:pointer;}#mermaid-svg-wFfundElaBMd3XJ8 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-wFfundElaBMd3XJ8 .arrowheadPath{fill:#333333;}#mermaid-svg-wFfundElaBMd3XJ8 .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-wFfundElaBMd3XJ8 .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-wFfundElaBMd3XJ8 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-wFfundElaBMd3XJ8 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-wFfundElaBMd3XJ8 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-wFfundElaBMd3XJ8 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-wFfundElaBMd3XJ8 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-wFfundElaBMd3XJ8 .cluster text{fill:#333;}#mermaid-svg-wFfundElaBMd3XJ8 .cluster span{color:#333;}#mermaid-svg-wFfundElaBMd3XJ8 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-wFfundElaBMd3XJ8 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-wFfundElaBMd3XJ8 rect.text{fill:none;stroke-width:0;}#mermaid-svg-wFfundElaBMd3XJ8 .icon-shape,#mermaid-svg-wFfundElaBMd3XJ8 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-wFfundElaBMd3XJ8 .icon-shape p,#mermaid-svg-wFfundElaBMd3XJ8 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-wFfundElaBMd3XJ8 .icon-shape rect,#mermaid-svg-wFfundElaBMd3XJ8 .image-shape rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-wFfundElaBMd3XJ8 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-wFfundElaBMd3XJ8 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-wFfundElaBMd3XJ8 :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"edgeLabel\"><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Terms on category<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Avg price<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Sum sales<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Top Hits: \u6700\u8d35\u5546\u54c1\u8be6\u60c5<\/p>\n<p><\/span><\/p>\n<p>         <span class=\"nodeLabel\"><\/p>\n<p>Cardinality: \u552f\u4e00\u5ba2\u6237\u6570<\/p>\n<p><\/span><\/p>\n<p>\u4f8b\u5982&#xff0c;\u83b7\u53d6\u6bcf\u4e2a\u7c7b\u522b\u4e2d\u6700\u8d35\u5546\u54c1\u7684\u5b8c\u6574\u4fe1\u606f&#xff1a;<\/p>\n<p><span class=\"token punctuation\">.<\/span><span class=\"token function\">aggregations<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;top_expensive&#034;<\/span><span class=\"token punctuation\">,<\/span> aa <span class=\"token operator\">-&gt;<\/span> aa<br \/>\n    <span class=\"token punctuation\">.<\/span><span class=\"token function\">topHits<\/span><span class=\"token punctuation\">(<\/span>t <span class=\"token operator\">-&gt;<\/span> t<br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>s <span class=\"token operator\">-&gt;<\/span> s<span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span>f <span class=\"token operator\">-&gt;<\/span> f<span class=\"token punctuation\">.<\/span><span class=\"token function\">field<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;price&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">order<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">SortOrder<span class=\"token punctuation\">.<\/span>Desc<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><\/p>\n<hr \/>\n<h3>\u603b\u7ed3\u4e0e\u5c55\u671b &#x1f3af;<\/h3>\n<p>\u901a\u8fc7\u672c\u6587&#xff0c;\u6211\u4eec\u6df1\u5165\u5b66\u4e60\u4e86 Elasticsearch \u4e2d Terms \u805a\u5408\u3001Max \u805a\u5408 \u548c Min \u805a\u5408 \u7684\u6838\u5fc3\u6982\u5ff5\u4e0e Java \u5b9e\u73b0\u3002\u5173\u952e\u8981\u70b9\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\u2705 Terms \u805a\u5408\u7528\u4e8e\u5206\u7ec4&#xff0c;Max\/Min \u7528\u4e8e\u6c42\u6781\u503c<\/li>\n<li>\u2705 \u901a\u8fc7\u5b50\u805a\u5408\u5b9e\u73b0\u5728\u5206\u7ec4\u5185\u8ba1\u7b97\u6307\u6807<\/li>\n<li>\u2705 \u638c\u63e1\u65b0\u7248 Java API Client \u4e0e\u65e7\u7248 High Level REST Client \u7684\u5199\u6cd5<\/li>\n<li>\u2705 \u4e86\u89e3\u6027\u80fd\u4f18\u5316\u4e0e\u5e38\u89c1\u9677\u9631<\/li>\n<\/ul>\n<p>Elasticsearch \u7684\u805a\u5408\u80fd\u529b\u8fdc\u4e0d\u6b62\u4e8e\u6b64\u3002\u968f\u7740\u4f60\u5bf9 Histogram\u3001Date Histogram\u3001Percentiles\u3001Scripted Metric 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