{"id":69104,"date":"2026-01-31T05:05:14","date_gmt":"2026-01-30T21:05:14","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/69104.html"},"modified":"2026-01-31T05:05:14","modified_gmt":"2026-01-30T21:05:14","slug":"utf-8%e4%b8%8eutf8mb4-%e7%9a%84%e8%b7%9f%e8%84%9a","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/69104.html","title":{"rendered":"UTF-8\u4e0eUTF8MB4 \u7684\u201c\u8ddf\u811a\u201c"},"content":{"rendered":"

\u4e00\u3001\u6838\u5fc3\u76f8\u540c\u70b9<\/h4>\n
  • Unicode \u5b9e\u73b0\u57fa\u7840 \u4e24\u8005\u5747\u4e3a Unicode \u5b57\u7b26\u96c6\u7684\u5b9e\u73b0\u65b9\u6848，\u517c\u5bb9 ASCII \u7f16\u7801（0-127 \u7801\u4f4d），\u82f1\u6587\u548c\u6570\u5b57\u5b58\u50a8\u65b9\u5f0f\u76f8\u540c \u3002<\/li>\n
  • \u53d8\u957f\u7f16\u7801\u673a\u5236 \u5747\u91c7\u7528 1-4 \u5b57\u8282\u52a8\u6001\u7f16\u7801\u5b57\u7b26，\u6839\u636e\u5b57\u7b26\u590d\u6742\u5ea6\u5206\u914d\u5b58\u50a8\u7a7a\u95f4 \u3002<\/li>\n
    \n

    \u4e8c\u3001\u5173\u952e\u5dee\u5f02<\/h4>\n\n\u5bf9\u6bd4\u7ef4\u5ea6UTF8 (MySQL \u5b9e\u9645\u4e3a UTF8MB3)UTF8MB4<\/tr>\n\n\n\n\n\n
    \u652f\u6301\u5b57\u7b26\u8303\u56f4<\/td>\n\u4ec5\u57fa\u672c\u591a\u8bed\u8a00\u5e73\u9762（BMP），0x0000-0xFFFF（\u5982\u5e38\u89c1\u6c49\u5b57）<\/td>\n\u5168\u90e8 Unicode \u5b57\u7b26（0x0000-0x10FFFF），\u5305\u62ec Emoji😊\u3001\u751f\u50fb\u5b57（𠀁）\u3001\u6570\u5b66\u7b26\u53f7\u7b49<\/td>\n<\/tr>\n
    \u6700\u5927\u5b57\u8282\/\u5b57\u7b26<\/td>\n3 \u5b57\u8282<\/td>\n4 \u5b57\u8282<\/td>\n<\/tr>\n
    \u5b58\u50a8\u7a7a\u95f4<\/td>\n\u66f4\u8282\u7701\u7a7a\u95f4（\u4e2d\u6587\u5360 3 \u5b57\u8282）<\/td>\n\u53ef\u80fd\u591a\u5360\u7528 33% \u7a7a\u95f4（\u90e8\u5206\u5b57\u7b26\u9700 4 \u5b57\u8282）<\/td>\n<\/tr>\n
    MySQL \u5386\u53f2\u95ee\u9898<\/td>\n\u65e9\u671f\u522b\u540d "utf8"，\u5b9e\u4e3a\u9609\u5272\u7248 UTF8MB3<\/td>\n\u771f\u6b63\u7684\u5b8c\u6574 UTF-8 \u5b9e\u73b0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    📌 \u6ce8：MySQL \u4e2d utf8 \u5b9e\u4e3a utf8mb3 \u7684\u522b\u540d，\u672a\u6765\u7248\u672c\u5c06\u9010\u6b65\u5e9f\u5f03\u5e76\u6307\u5411 utf8mb423\u3002<\/p>\n

    \n

    \u4e09\u3001\u4f7f\u7528\u573a\u666f\u9009\u62e9<\/h4>\n
      <\/ul>\n
      1. \u793e\u4ea4\u5e94\u7528\u5b58\u50a8Emoji\u8868\u60c5<\/h5>\n
        \n
      • \u95ee\u9898：\u7528\u6237\u6635\u79f0\u6216\u8bc4\u8bba\u4e2d\u5305\u542bEmoji\u65f6，MySQL\u7684utf8（\u5b9e\u9645\u4e3autf8mb3）\u65e0\u6cd5\u5b58\u50a84\u5b57\u8282\u5b57\u7b26，\u5bfc\u81f4\u63d2\u5165\u5931\u8d25\u6216\u4e71\u7801\u3002<\/li>\n
      • \u89e3\u51b3\u65b9\u6848：\u5c06\u6570\u636e\u5e93\u5b57\u7b26\u96c6\u6539\u4e3autf8mb4，\u4f8b\u5982\u5fae\u4fe1\u3001\u5fae\u535a\u7b49\u5e73\u53f0\u5747\u91c7\u7528\u6b64\u65b9\u6848\u652f\u6301\u8868\u60c5\u7b26\u53f7\u3002<\/li>\n<\/ul>\n
        2. \u591a\u8bed\u8a00\u7cfb\u7edf\u517c\u5bb9\u751f\u50fb\u5b57<\/h5>\n
          \n
        • \u6848\u4f8b：\u653f\u5e9c\u7cfb\u7edf\u9700\u5b58\u50a8\u751f\u50fb\u6c49\u5b57（\u5982\u201c𠀁\u201d）\u6216\u5c11\u6570\u6c11\u65cf\u6587\u5b57（\u5982\u85cf\u6587），utf8\u4ec5\u652f\u6301\u57fa\u672c\u591a\u8bed\u8a00\u5e73\u9762（BMP），\u800cutf8mb4\u53ef\u8986\u76d6\u5168\u90e8Unicode\u5b57\u7b26\u3002<\/li>\n
        • \u7ed3\u679c：\u8fc1\u79fb\u81f3utf8mb4\u540e，\u751f\u50fb\u5b57\u663e\u793a\u6b63\u5e38，\u907f\u514d\u6570\u636e\u622a\u65ad\u3002<\/li>\n<\/ul>\n
          3. \u5386\u53f2\u6570\u636e\u8fc1\u79fb\u95ee\u9898<\/h5>\n
            \n
          • \u573a\u666f：\u65e7\u7cfb\u7edf\u5347\u7ea7\u65f6，\u539futf8\u8868\u65e0\u6cd5\u517c\u5bb9\u65b0\u589eUnicode\u5b57\u7b26（\u59822023\u5e74\u53d1\u5e03\u7684Emoji）\u3002<\/li>\n
          • \u64cd\u4f5c：\u901a\u8fc7ALTER TABLE\u8f6c\u6362\u5b57\u7b26\u96c6，\u5e76\u8c03\u6574\u7d22\u5f15\u957f\u5ea6（\u56e0utf8mb4\u53ef\u80fd\u89e6\u53d1768\u5b57\u8282\u7d22\u5f15\u9650\u5236\u3002<\/li>\n<\/ul>\n
            \u4f18\u5148\u9009\u62e9 UTF8MB4 \u7684\u60c5\u51b5<\/h5>\n
          • \u5b58\u50a8 Emoji \u6216\u7279\u6b8a\u7b26\u53f7 \u2192 \u793e\u4ea4\u5e94\u7528\u6635\u79f0\u3001\u8bc4\u8bba\u5185\u5bb9\u3001\u804a\u5929\u8bb0\u5f55\u9700\u652f\u6301\u8868\u60c5\u7b26\u53f7 \u3002<\/li>\n
          • \u591a\u8bed\u8a00\u6df7\u5408\u73af\u5883 \u2192 \u9700\u5904\u7406\u7f55\u89c1\u6c49\u5b57（\u5982𠙶）\u3001\u85cf\u6587\u3001\u963f\u62c9\u4f2f\u53d8\u4f53\u5b57\u7b26\u7b49 \u3002<\/li>\n
          • \u672a\u6765\u517c\u5bb9\u6027\u8981\u6c42\u9ad8 \u2192 \u907f\u514d\u56e0\u65b0\u589e Unicode \u5b57\u7b26（\u5982\u65b0 Emoji）\u5bfc\u81f4\u6570\u636e\u5199\u5165\u5931\u8d25 \u3002<\/li>\n
            \u53ef\u8003\u8651 UTF8 (UTF8MB3) \u7684\u60c5\u51b5<\/h5>\n
              \n
            • \u7eaf\u6587\u672c\u5b58\u50a8：\u4ec5\u542b\u57fa\u7840\u6c49\u5b57\u3001\u82f1\u6587\u3001\u6570\u5b57\u7684\u7cfb\u7edf（\u5982\u5185\u90e8\u7ba1\u7406\u7cfb\u7edf）\u3002<\/li>\n
            • \u5b58\u50a8\u654f\u611f\u578b\u573a\u666f：\u6d77\u91cf\u6587\u672c\u5b58\u50a8\u4e14\u4e25\u683c\u9650\u5236\u7a7a\u95f4，\u4e14\u786e\u8ba4\u65e0\u9700\u7279\u6b8a\u5b57\u7b26\u652f\u6301 \u3002<\/li>\n<\/ul>\n
              \n

              \u56db\u3001\u6027\u80fd\u4e0e\u517c\u5bb9\u6027\u6ce8\u610f\u4e8b\u9879<\/h4>\n
            • \u6392\u5e8f\u89c4\u5219\u9009\u62e9\n
                \n
              • utf8mb4_general_ci：\u7b80\u5355\u89c4\u5219，\u6027\u80fd\u5feb，\u9002\u5408\u82f1\u6587\u4e3a\u4e3b\u573a\u666f \u3002<\/li>\n
              • utf8mb4_unicode_ci：\u4e25\u683c\u9075\u5faa Unicode \u6392\u5e8f，\u591a\u8bed\u8a00\u652f\u6301\u66f4\u7cbe\u51c6（\u63a8\u8350\u9ed8\u8ba4\u4f7f\u7528）\u3002<\/li>\n<\/ul>\n<\/li>\n
              • \u7d22\u5f15\u4e0e\u5b57\u6bb5\u4f18\u5316\n
                  \n
                • \u4f7f\u7528 VARCHAR \u66ff\u4ee3 CHAR，\u907f\u514d\u5b9a\u957f\u5b57\u6bb5\u6d6a\u8d39\u7a7a\u95f4 \u3002<\/li>\n
                • \u7d22\u5f15\u957f\u5ea6\u9650\u5236：\u82e5\u5b57\u6bb5\u9700\u7d22\u5f15，\u9700\u6ce8\u610f 4 \u5b57\u8282\u5b57\u7b26\u53ef\u80fd\u89e6\u53d1\u7d22\u5f15\u957f\u5ea6\u9650\u5236（\u5982 VARCHAR(255) \u53ef\u80fd\u9700\u964d\u4e3a VARCHAR(191)）\u3002<\/li>\n<\/ul>\n<\/li>\n
                  \n

                  \u4e94\u3001MySQL \u5347\u7ea7\u5b9e\u8df5\u6b65\u9aa4<\/h4>\n

                  — 1. \u4fee\u6539\u6570\u636e\u5e93\u9ed8\u8ba4\u5b57\u7b26\u96c6
                  \nALTER DATABASE `db_name`
                  \n CHARACTER SET = utf8mb4
                  \n COLLATE = utf8mb4_unicode_ci;<\/p>\n

                  — 2. \u8f6c\u6362\u73b0\u6709\u8868\u7f16\u7801
                  \nALTER TABLE `table_name`
                  \n CONVERT TO CHARACTER SET utf8mb4
                  \n COLLATE utf8mb4_unicode_ci;<\/p>\n

                  — 3. \u8c03\u6574\u8fde\u63a5\u914d\u7f6e（\u5982 JDBC）
                  \njdbc:mysql:\/\/host\/db?useUnicode=true&characterEncoding=utf8mb4 <\/p>\n

                  \u26a0\ufe0f \u6ce8\u610f：\u5347\u7ea7\u524d\u9700\u786e\u4fdd MySQL \u22655.5.3，\u5e76\u5907\u4efd\u6570\u636e \u3002<\/p>\n

                  \n

                  \u516d\u3001\u603b\u7ed3\u5efa\u8bae<\/h4>\n
                    \n
                  • \u65b0\u9879\u76ee\u4e00\u5f8b\u4f7f\u7528 UTF8MB4：\u89c4\u907f\u5b57\u7b26\u517c\u5bb9\u98ce\u9669，\u9002\u914d\u672a\u6765\u6269\u5c55 \u3002<\/li>\n
                  • \u65e7\u7cfb\u7edf\u6309\u9700\u5347\u7ea7：\u82e5\u51fa\u73b0 Emoji \u4e71\u7801\u6216\u5b58\u50a8\u9519\u8bef，\u6309\u4e0a\u8ff0\u6b65\u9aa4\u8fc1\u79fb \u3002<\/li>\n
                  • \u5168\u5c40\u7f16\u7801\u7edf\u4e00：\u786e\u4fdd\u5e94\u7528\u5c42\u3001\u6570\u636e\u5e93\u3001\u6587\u4ef6\u5b58\u50a8\u5747\u4f7f\u7528 UTF8MB4，\u907f\u514d\u4e71\u7801 \u3002<\/li>\n<\/ul>\n

                    \u6ca1\u770b\u591f\u7684，\u627e\u4e86\u4e09\u7bc7\u6280\u672f\u7ec6\u8282\u53ef\u7eed\u4e0a： – UTF-8 \u7f16\u7801\u539f\u7406\u4e0e\u5b58\u50a8\u4f18\u5316 – MySQL \u5b57\u7b26\u96c6\u6f14\u8fdb\u53f2 – \u6392\u5e8f\u89c4\u5219\u6027\u80fd\u5bf9\u6bd4\u5b9e\u6d4b<\/p>\n","protected":false},"excerpt":{"rendered":"

                    \u4e00\u3001\u6838\u5fc3\u76f8\u540c\u70b9
                    \nUnicode \u5b9e\u73b0\u57fa\u7840 \u4e24\u8005\u5747\u4e3a Unicode \u5b57\u7b26\u96c6\u7684\u5b9e\u73b0\u65b9\u6848，\u517c\u5bb9 ASCII \u7f16\u7801（0-127 \u7801\u4f4d），\u82f1\u6587\u548c\u6570\u5b57\u5b58\u50a8\u65b9\u5f0f\u76f8\u540c \u3002\u53d8\u957f\u7f16\u7801\u673a\u5236 \u5747\u91c7\u7528 1-4 \u5b57\u8282\u52a8\u6001\u7f16\u7801\u5b57\u7b26，\u6839\u636e\u5b57\u7b26\u590d\u6742\u5ea6\u5206\u914d\u5b58\u50a8\u7a7a\u95f4 \u3002 \u4e8c\u3001\u5173\u952e\u5dee\u5f02
                    \n\u5bf9\u6bd4\u7ef4\u5ea6UTF8 (MySQL \u5b9e\u9645\u4e3a UTF8MB3)UTF8MB4\u652f\u6301\u5b57\u7b26\u8303\u56f4\u4ec5\u57fa\u672c\u591a\u8bed\u8a00\u5e73\u9762（BMP），0x<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[125],"topic":[],"class_list":["post-69104","post","type-post","status-publish","format-standard","hentry","category-server","tag-125"],"yoast_head":"\nUTF-8\u4e0eUTF8MB4 \u7684\u201c\u8ddf\u811a\u201c - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/69104.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"UTF-8\u4e0eUTF8MB4 \u7684\u201c\u8ddf\u811a\u201c - 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