{"id":54582,"date":"2025-08-13T08:19:51","date_gmt":"2025-08-13T00:19:51","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/54582.html"},"modified":"2025-08-13T08:19:51","modified_gmt":"2025-08-13T00:19:51","slug":"%e4%bd%bf%e7%94%a8mycat%e8%bf%9b%e8%a1%8c%e5%88%86%e8%a1%a8%e5%88%86%e5%ba%93%e7%9a%84%e8%af%a6%e7%bb%86%e6%ad%a5%e9%aa%a4","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/54582.html","title":{"rendered":"\u4f7f\u7528MyCat\u8fdb\u884c\u5206\u8868\u5206\u5e93\u7684\u8be6\u7ec6\u6b65\u9aa4"},"content":{"rendered":"<h4>1. \u73af\u5883\u51c6\u5907<\/h4>\n<h5>1.1 \u5b89\u88c5MySQL<\/h5>\n<p>\u51c6\u59073\u4e2aMySQL\u5b9e\u4f8b&#xff08;\u53ef\u4ee5\u662f\u5355\u673a\u591a\u5b9e\u4f8b\u6216\u4e0d\u540c\u670d\u52a1\u5668&#xff09;&#xff1a;<\/p>\n<ul>\n<li>192.168.1.100:3306 (db1)<\/li>\n<li>192.168.1.101:3306 (db2)<\/li>\n<li>192.168.1.102:3306 (db3)<\/li>\n<\/ul>\n<h5>1.2 \u5b89\u88c5MyCat<\/h5>\n<p><span class=\"token comment\"># \u4e0b\u8f7dMyCat 1.6<\/span><br \/>\n<span class=\"token function\">wget<\/span> http:\/\/dl.mycat.org.cn\/1.6-RELEASE\/Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz<br \/>\n<span class=\"token function\">tar<\/span> -zxvf Mycat-server-1.6-RELEASE-*.tar.gz<br \/>\n<span class=\"token builtin class-name\">cd<\/span> mycat<\/p>\n<h4>2. \u521b\u5efa\u7269\u7406\u5e93\u548c\u8868<\/h4>\n<p>\u5728\u6bcf\u4e2aMySQL\u5b9e\u4f8b\u6267\u884c&#xff1a;<\/p>\n<p><span class=\"token comment\">&#8212; \u521b\u5efa\u6570\u636e\u5e93<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">DATABASE<\/span> <span class=\"token keyword\">IF<\/span> <span class=\"token operator\">NOT<\/span> <span class=\"token keyword\">EXISTS<\/span> db1 <span class=\"token keyword\">DEFAULT<\/span> <span class=\"token keyword\">CHARSET<\/span> utf8mb4<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">DATABASE<\/span> <span class=\"token keyword\">IF<\/span> <span class=\"token operator\">NOT<\/span> <span class=\"token keyword\">EXISTS<\/span> db2 <span class=\"token keyword\">DEFAULT<\/span> <span class=\"token keyword\">CHARSET<\/span> utf8mb4<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">DATABASE<\/span> <span class=\"token keyword\">IF<\/span> <span class=\"token operator\">NOT<\/span> <span class=\"token keyword\">EXISTS<\/span> db3 <span class=\"token keyword\">DEFAULT<\/span> <span class=\"token keyword\">CHARSET<\/span> utf8mb4<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">&#8212; \u521b\u5efa\u5206\u8868&#xff08;\u4ee5\u8ba2\u5355\u8868\u4e3a\u4f8b&#xff09;<\/span><br \/>\n<span class=\"token keyword\">USE<\/span> db1<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_0<span class=\"token punctuation\">&#096;<\/span> <span class=\"token punctuation\">(<\/span><br \/>\n  <span class=\"token punctuation\">&#096;<\/span>id<span class=\"token punctuation\">&#096;<\/span> <span class=\"token keyword\">BIGINT<\/span> <span class=\"token keyword\">AUTO_INCREMENT<\/span> <span class=\"token keyword\">PRIMARY<\/span> <span class=\"token keyword\">KEY<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token punctuation\">&#096;<\/span>user_id<span class=\"token punctuation\">&#096;<\/span> <span class=\"token keyword\">BIGINT<\/span> <span class=\"token operator\">NOT<\/span> <span class=\"token boolean\">NULL<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token punctuation\">&#096;<\/span>amount<span class=\"token punctuation\">&#096;<\/span> <span class=\"token keyword\">DECIMAL<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">NOT<\/span> <span class=\"token boolean\">NULL<\/span><span class=\"token punctuation\">,<\/span><br \/>\n  <span class=\"token punctuation\">&#096;<\/span>create_time<span class=\"token punctuation\">&#096;<\/span> <span class=\"token keyword\">DATETIME<\/span> <span class=\"token keyword\">DEFAULT<\/span> <span class=\"token keyword\">CURRENT_TIMESTAMP<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_1<span class=\"token punctuation\">&#096;<\/span> <span class=\"token operator\">LIKE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_0<span class=\"token punctuation\">&#096;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">USE<\/span> db2<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_2<span class=\"token punctuation\">&#096;<\/span> <span class=\"token operator\">LIKE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_0<span class=\"token punctuation\">&#096;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_3<span class=\"token punctuation\">&#096;<\/span> <span class=\"token operator\">LIKE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_0<span class=\"token punctuation\">&#096;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">USE<\/span> db3<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_4<span class=\"token punctuation\">&#096;<\/span> <span class=\"token operator\">LIKE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_0<span class=\"token punctuation\">&#096;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">CREATE<\/span> <span class=\"token keyword\">TABLE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_5<span class=\"token punctuation\">&#096;<\/span> <span class=\"token operator\">LIKE<\/span> <span class=\"token punctuation\">&#096;<\/span>t_order_0<span class=\"token punctuation\">&#096;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>3. MyCat\u914d\u7f6e<\/h4>\n<h5>3.1 \u914d\u7f6eserver.xml<\/h5>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token namespace\">mycat:<\/span>server<\/span> <span class=\"token attr-name\"><span class=\"token namespace\">xmlns:<\/span>mycat<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>http:\/\/io.mycat\/<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>user<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>root<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">defaultAccount<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>true<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>property<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>password<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>123456<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>property<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>property<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>schemas<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>order_db<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>property<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>user<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span><span class=\"token namespace\">mycat:<\/span>server<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<h5>3.2 \u914d\u7f6eschema.xml<\/h5>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token namespace\">mycat:<\/span>schema<\/span> <span class=\"token attr-name\"><span class=\"token namespace\">xmlns:<\/span>mycat<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>http:\/\/io.mycat\/<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n  <span class=\"token comment\">&lt;!&#8211; \u903b\u8f91\u5e93 &#8211;&gt;<\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>schema<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>order_db<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">checkSQLschema<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>false<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">sqlMaxLimit<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>100<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token comment\">&lt;!&#8211; \u5206\u8868\u914d\u7f6e &#8211;&gt;<\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>table<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>t_order<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">dataNode<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>dn1,dn2,dn3<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">rule<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>mod-long<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>schema<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>  <span class=\"token comment\">&lt;!&#8211; \u6570\u636e\u8282\u70b9 &#8211;&gt;<\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>dataNode<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>dn1<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">dataHost<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>host1<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">database<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>db1<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>dataNode<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>dn2<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">dataHost<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>host2<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">database<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>db2<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>dataNode<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>dn3<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">dataHost<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>host3<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">database<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>db3<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span><\/p>\n<p>  <span class=\"token comment\">&lt;!&#8211; \u7269\u7406\u4e3b\u673a\u914d\u7f6e &#8211;&gt;<\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>dataHost<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>host1<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">maxCon<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>1000<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">minCon<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>10<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">balance<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>0<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">writeType<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>0<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">dbType<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>mysql<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">dbDriver<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>native<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>heartbeat<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>select user()<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>heartbeat<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>writeHost<\/span> <span class=\"token attr-name\">host<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>hostM1<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">url<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>192.168.1.100:3306<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">user<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>root<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">password<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>mysql123<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>dataHost<\/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>dataHost<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>host2<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">maxCon<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>1000<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">minCon<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>10<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">balance<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>0<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">writeType<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>0<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">dbType<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>mysql<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">dbDriver<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>native<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>heartbeat<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>select user()<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>heartbeat<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>writeHost<\/span> <span class=\"token attr-name\">host<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>hostM2<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">url<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>192.168.1.101:3306<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">user<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>root<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">password<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>mysql123<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>dataHost<\/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>dataHost<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>host3<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">maxCon<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>1000<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">minCon<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>10<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">balance<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>0<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">writeType<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>0<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">dbType<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>mysql<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">dbDriver<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>native<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>heartbeat<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>select user()<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>heartbeat<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>writeHost<\/span> <span class=\"token attr-name\">host<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>hostM3<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">url<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>192.168.1.102:3306<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">user<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>root<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">password<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>mysql123<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>dataHost<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span><span class=\"token namespace\">mycat:<\/span>schema<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<h5>3.3 \u914d\u7f6erule.xml<\/h5>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token namespace\">mycat:<\/span>rule<\/span> <span class=\"token attr-name\"><span class=\"token namespace\">xmlns:<\/span>mycat<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>http:\/\/io.mycat\/<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>tableRule<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>mod-long<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>rule<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n      <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>columns<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>user_id<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>columns<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n      <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>algorithm<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>mod-long<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>algorithm<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>rule<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>tableRule<\/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>function<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>mod-long<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">class<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>io.mycat.route.function.PartitionByMod<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token comment\">&lt;!&#8211; \u5206\u7247\u6570\u91cf &#8211;&gt;<\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>property<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>count<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span>3<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>property<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n  <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>function<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span><span class=\"token namespace\">mycat:<\/span>rule<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<h4>4. \u542f\u52a8MyCat<\/h4>\n<p>.\/bin\/mycat start<br \/>\n<span class=\"token function\">tail<\/span> -f logs\/mycat.log  <span class=\"token comment\"># \u67e5\u770b\u542f\u52a8\u65e5\u5fd7<\/span><\/p>\n<h4>5. Java\u4ee3\u7801\u793a\u4f8b<\/h4>\n<h5>5.1 Maven\u4f9d\u8d56<\/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>mysql<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>mysql-connector-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>8.0.28<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>5.2 \u8fde\u63a5\u914d\u7f6e<\/h5>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">MyCatDataSource<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">String<\/span> URL <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;jdbc:mysql:\/\/localhost:8066\/order_db?useSSL&#061;false&amp;serverTimezone&#061;UTC&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">String<\/span> USER <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;root&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">String<\/span> PASSWORD <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;123456&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token class-name\">Connection<\/span> <span class=\"token function\">getConnection<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">throws<\/span> <span class=\"token class-name\">SQLException<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token class-name\">DriverManager<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getConnection<\/span><span class=\"token punctuation\">(<\/span>URL<span class=\"token punctuation\">,<\/span> USER<span class=\"token punctuation\">,<\/span> PASSWORD<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<h5>5.3 \u63d2\u5165\u6570\u636e<\/h5>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderDAO<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">insertOrder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Long<\/span> userId<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">BigDecimal<\/span> amount<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> sql <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;INSERT INTO t_order (user_id, amount) VALUES (?, ?)&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Connection<\/span> conn <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">MyCatDataSource<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getConnection<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n             <span class=\"token class-name\">PreparedStatement<\/span> pstmt <span class=\"token operator\">&#061;<\/span> conn<span class=\"token punctuation\">.<\/span><span class=\"token function\">prepareStatement<\/span><span class=\"token punctuation\">(<\/span>sql<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>            pstmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">setLong<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> userId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            pstmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">setBigDecimal<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> amount<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            pstmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">executeUpdate<\/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;Order inserted for user: &#034;<\/span> <span class=\"token operator\">&#043;<\/span> userId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">SQLException<\/span> e<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            e<span class=\"token punctuation\">.<\/span><span class=\"token function\">printStackTrace<\/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><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>5.4 \u67e5\u8be2\u6570\u636e<\/h5>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderQuery<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">findByUserId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Long<\/span> userId<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">String<\/span> sql <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;SELECT * FROM t_order WHERE user_id &#061; ?&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">try<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Connection<\/span> conn <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">MyCatDataSource<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getConnection<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n             <span class=\"token class-name\">PreparedStatement<\/span> pstmt <span class=\"token operator\">&#061;<\/span> conn<span class=\"token punctuation\">.<\/span><span class=\"token function\">prepareStatement<\/span><span class=\"token punctuation\">(<\/span>sql<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>            pstmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">setLong<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> userId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\">ResultSet<\/span> rs <span class=\"token operator\">&#061;<\/span> pstmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">executeQuery<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>rs<span class=\"token punctuation\">.<\/span><span class=\"token function\">next<\/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\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;ID: %d, User: %d, Amount: %.2f%n&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                    rs<span class=\"token punctuation\">.<\/span><span class=\"token function\">getLong<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;id&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                    rs<span class=\"token punctuation\">.<\/span><span class=\"token function\">getLong<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;user_id&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n                    rs<span class=\"token punctuation\">.<\/span><span class=\"token function\">getBigDecimal<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;amount&#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 keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">SQLException<\/span> e<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            e<span class=\"token punctuation\">.<\/span><span class=\"token function\">printStackTrace<\/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><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>6. \u6d4b\u8bd5\u9a8c\u8bc1<\/h4>\n<h5>6.1 \u63d2\u5165\u6d4b\u8bd5\u6570\u636e<\/h5>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Main<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token class-name\">OrderDAO<\/span> dao <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">OrderDAO<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u63d2\u516510\u6761\u6570\u636e<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">long<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            dao<span class=\"token punctuation\">.<\/span><span class=\"token function\">insertOrder<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">BigDecimal<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;100.00&#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><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h5>6.2 \u9a8c\u8bc1\u5206\u7247<\/h5>\n<p>\u8fde\u63a5MyCat\u7aef\u53e3\u67e5\u770b\u6570\u636e\u5206\u5e03&#xff1a;<\/p>\n<p>mysql -uroot -p123456 -h127.0.0.1 -P8066 -Dorder_db<\/p>\n<p>\u6267\u884c\u67e5\u8be2&#xff1a;<\/p>\n<p><span class=\"token comment\">&#8212; \u67e5\u770b\u603b\u6570\u636e<\/span><br \/>\n<span class=\"token keyword\">SELECT<\/span> <span class=\"token function\">COUNT<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">FROM<\/span> t_order<span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">&#8212; \u67e5\u770b\u5177\u4f53\u5206\u7247<\/span><br \/>\n<span class=\"token keyword\">EXPLAIN<\/span> <span class=\"token keyword\">SELECT<\/span> <span class=\"token operator\">*<\/span> <span class=\"token keyword\">FROM<\/span> t_order <span class=\"token keyword\">WHERE<\/span> user_id <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>7. \u6ce8\u610f\u4e8b\u9879<\/h4>\n<li>\u5168\u5c40\u5e8f\u5217&#xff1a;\u9700\u8981\u914d\u7f6e\u5168\u5c40\u81ea\u589eID&#xff0c;\u63a8\u8350\u4f7f\u7528\u96ea\u82b1\u7b97\u6cd5\u6216\u6570\u636e\u5e93\u5e8f\u5217<\/li>\n<li>\u8de8\u5206\u7247\u67e5\u8be2&#xff1a;\u907f\u514d\u4e0d\u5e26\u5206\u7247\u952e\u7684\u67e5\u8be2&#xff0c;\u4f1a\u5bfc\u81f4\u5168\u5206\u7247\u626b\u63cf<\/li>\n<li>\u4e8b\u52a1&#xff1a;MyCat\u652f\u6301\u5f31XA\u4e8b\u52a1&#xff0c;\u4f46\u6027\u80fd\u8f83\u4f4e&#xff0c;\u5efa\u8bae\u4e1a\u52a1\u5c42\u5904\u7406<\/li>\n<li>\u6269\u5bb9&#xff1a;\u589e\u52a0\u5206\u7247\u9700\u8981\u6570\u636e\u8fc1\u79fb&#xff0c;\u5efa\u8bae\u63d0\u524d\u505a\u597d\u5bb9\u91cf\u89c4\u5212<\/li>\n<h4>8. \u6269\u5bb9\u65b9\u6848<\/h4>\n<p>\u5f53\u9700\u8981\u6269\u5c55\u52306\u4e2a\u5206\u7247\u65f6&#xff1a;<\/p>\n<li>\u65b0\u589e3\u4e2aMySQL\u5b9e\u4f8b<\/li>\n<li>\u4fee\u6539rule.xml\u4e2d\u7684count&#061;6<\/li>\n<li>\u91cd\u65b0\u5206\u914d\u6570\u636e&#xff08;\u9700\u8981\u8fc1\u79fb\u5de5\u5177\u5982mysqldump\u6216\u81ea\u7814\u811a\u672c&#xff09;<\/li>\n<p>\u8fd9\u4e2a\u793a\u4f8b\u5c55\u793a\u4e86MyCat\u7684\u5b8c\u6574\u5206\u5e93\u5206\u8868\u5b9e\u73b0&#xff0c;\u5b9e\u9645\u751f\u4ea7\u73af\u5883\u9700\u8981\u6839\u636e\u4e1a\u52a1\u7279\u70b9\u8c03\u6574\u5206\u7247\u7b56\u7565\u548c\u914d\u7f6e\u53c2\u6570\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb802\u6b21\uff0c\u70b9\u8d5e16\u6b21\uff0c\u6536\u85cf9\u6b21\u3002\u8fd9\u4e2a\u793a\u4f8b\u5c55\u793a\u4e86MyCat\u7684\u5b8c\u6574\u5206\u5e93\u5206\u8868\u5b9e\u73b0\uff0c\u5b9e\u9645\u751f\u4ea7\u73af\u5883\u9700\u8981\u6839\u636e\u4e1a\u52a1\u7279\u70b9\u8c03\u6574\u5206\u7247\u7b56\u7565\u548c\u914d\u7f6e\u53c2\u6570\u3002<\/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":[99],"topic":[],"class_list":["post-54582","post","type-post","status-publish","format-standard","hentry","category-server","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u4f7f\u7528MyCat\u8fdb\u884c\u5206\u8868\u5206\u5e93\u7684\u8be6\u7ec6\u6b65\u9aa4 - \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\/54582.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4f7f\u7528MyCat\u8fdb\u884c\u5206\u8868\u5206\u5e93\u7684\u8be6\u7ec6\u6b65\u9aa4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb802\u6b21\uff0c\u70b9\u8d5e16\u6b21\uff0c\u6536\u85cf9\u6b21\u3002\u8fd9\u4e2a\u793a\u4f8b\u5c55\u793a\u4e86MyCat\u7684\u5b8c\u6574\u5206\u5e93\u5206\u8868\u5b9e\u73b0\uff0c\u5b9e\u9645\u751f\u4ea7\u73af\u5883\u9700\u8981\u6839\u636e\u4e1a\u52a1\u7279\u70b9\u8c03\u6574\u5206\u7247\u7b56\u7565\u548c\u914d\u7f6e\u53c2\u6570\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/54582.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-13T00:19:51+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/54582.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/54582.html\",\"name\":\"\u4f7f\u7528MyCat\u8fdb\u884c\u5206\u8868\u5206\u5e93\u7684\u8be6\u7ec6\u6b65\u9aa4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2025-08-13T00:19:51+00:00\",\"dateModified\":\"2025-08-13T00:19:51+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/54582.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/54582.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/54582.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u4f7f\u7528MyCat\u8fdb\u884c\u5206\u8868\u5206\u5e93\u7684\u8be6\u7ec6\u6b65\u9aa4\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u4f7f\u7528MyCat\u8fdb\u884c\u5206\u8868\u5206\u5e93\u7684\u8be6\u7ec6\u6b65\u9aa4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/54582.html","og_locale":"zh_CN","og_type":"article","og_title":"\u4f7f\u7528MyCat\u8fdb\u884c\u5206\u8868\u5206\u5e93\u7684\u8be6\u7ec6\u6b65\u9aa4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb802\u6b21\uff0c\u70b9\u8d5e16\u6b21\uff0c\u6536\u85cf9\u6b21\u3002\u8fd9\u4e2a\u793a\u4f8b\u5c55\u793a\u4e86MyCat\u7684\u5b8c\u6574\u5206\u5e93\u5206\u8868\u5b9e\u73b0\uff0c\u5b9e\u9645\u751f\u4ea7\u73af\u5883\u9700\u8981\u6839\u636e\u4e1a\u52a1\u7279\u70b9\u8c03\u6574\u5206\u7247\u7b56\u7565\u548c\u914d\u7f6e\u53c2\u6570\u3002","og_url":"https:\/\/www.wsisp.com\/helps\/54582.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2025-08-13T00:19:51+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"4 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/54582.html","url":"https:\/\/www.wsisp.com\/helps\/54582.html","name":"\u4f7f\u7528MyCat\u8fdb\u884c\u5206\u8868\u5206\u5e93\u7684\u8be6\u7ec6\u6b65\u9aa4 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2025-08-13T00:19:51+00:00","dateModified":"2025-08-13T00:19:51+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/54582.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/54582.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/54582.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u4f7f\u7528MyCat\u8fdb\u884c\u5206\u8868\u5206\u5e93\u7684\u8be6\u7ec6\u6b65\u9aa4"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/54582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=54582"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/54582\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=54582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=54582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=54582"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=54582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}