{"id":44,"date":"2025-09-01T16:50:00","date_gmt":"2025-09-01T08:50:00","guid":{"rendered":"http:\/\/caihh.top\/?p=44"},"modified":"2025-09-05T11:22:48","modified_gmt":"2025-09-05T03:22:48","slug":"jdbc","status":"publish","type":"post","link":"https:\/\/caihh.top\/index.php\/2025\/09\/01\/jdbc\/","title":{"rendered":"JDBC \u5b66\u4e60"},"content":{"rendered":"\n<p><strong>\u6982\u5ff5\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5168\u79f0\uff1a\uff08Java DataBase Connectivity\uff09<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>JDBC\u5c31\u662f\u4f7f\u7528Java\u8bed\u8a00\u64cd\u4f5c\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u4e00\u5957API<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-style-default\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-1.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"639\" height=\"428\" data-original=\"http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-46\"  sizes=\"auto, (max-width: 639px) 100vw, 639px\" \/><\/div><\/figure>\n\n\n\n<p><strong>\u6b65\u9aa4<\/strong><\/p>\n\n\n\n<p>1.\u521b\u5efa\u5de5\u7a0b\uff0c\u5bfc\u5165\u9a71\u52a8jar\u5305&#8211;&gt;mysql-connector-java-5.1.48.jar<\/p>\n\n\n\n<p>\u53ef\u4ee5\u5728<a href=\"https:\/\/repo1.maven.org\/maven2\/mysql\/mysql-connector-java\/5.1.48\/\">https:\/\/repo1.maven.org\/maven2\/mysql\/mysql-connector-java\/5.1.48\/<\/a>Maven \u4e2d\u592e\u4ed3\u5e93\u4e0b\u8f7d\u8be5jar\u5305<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-2.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"675\" height=\"351\" data-original=\"http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-2.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-48\" style=\"width:540px;height:auto\"  sizes=\"auto, (max-width: 675px) 100vw, 675px\" \/><\/div><\/figure>\n\n\n\n<p>2.\u968f\u540e\u53f3\u51fbjar\u5305\uff0c\u6b65\u9aa4\u5982\u4e0b<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-3.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"661\" height=\"229\" data-original=\"http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-3.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-50\" style=\"width:537px;height:auto\"  sizes=\"auto, (max-width: 661px) 100vw, 661px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-4.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"572\" height=\"295\" data-original=\"http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-4.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-51\" style=\"width:536px;height:auto\"  sizes=\"auto, (max-width: 572px) 100vw, 572px\" \/><\/div><\/figure>\n\n\n\n<p>3.\u5728src\/com\/itheima\/jdbc\u4e2d\u7684JDBCDemo.java\u5199\u4e0b\u4ee5\u4e0b\u4ee3\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>package com.itheima.jdbc;\n\nimport java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.Statement;\n\n<em>\/**\n<\/em><em> * JDBC<\/em><em>\u5feb\u901f\u5165\u95e8\n<\/em><em> <\/em><em>*\/\n<\/em>public class JDBCDemo {\n    public static void main(String&#91;] args) throws Exception{\n        \/\/1.\u6ce8\u518c\u9a71\u52a8\n        Class.<em>forName<\/em>(\"com.mysql.jdbc.Driver\");\n\n        \/\/2.\u83b7\u53d6\u94fe\u63a5\n        String url=\"jdbc:mysql:\/\/ip\u5730\u5740\uff08\u57df\u540d\uff09:\u7aef\u53e3\u53f7\/\u6570\u636e\u5e93\u540d\u79f0\";\n        String username=\"\u7528\u6237\u540d\";\n        String password=\"\u5bc6\u7801\";\n        Connection conn= DriverManager.<em>getConnection<\/em>(url,username,password);\n\n        \/\/3.\u5b9a\u4e49sql\n        String sql=\"update...\";\n\n        \/\/4.\u83b7\u53d6\u6267\u884csql\u7684\u5bf9\u8c61Statement\n        Statement stmt = conn.createStatement();\n\n        \/\/5.\u6267\u884csql\n        int count = (int) stmt.executeLargeUpdate(sql);\/\/\u53d7\u5f71\u54cd\u7684\u884c\u6570\n\n        \/\/6.\u5904\u7406\u7ed3\u679c\n        System.<em>out<\/em>.println(count);\n\n        \/\/7.\u91ca\u653e\u8d44\u6e90\n        stmt.close();\n        conn.close();\n    }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>JDBC API \u8be6\u89e3<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><em>DriverManager\u3001Connection\u3001Statement\u3001ResultSet\u3001PreparedStatement<\/em><\/h3>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>DriverManager<\/strong><\/h2>\n\n\n\n<p>1.\u6ce8\u518c\u9a71\u52a8<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/1.\u6ce8\u518c\u9a71\u52a8<br>Class.<em>forName<\/em>(\"com.mysql.jdbc.Driver\");<\/code><\/pre>\n\n\n\n<p>2.\u83b7\u53d6\u94fe\u63a5<\/p>\n\n\n\n<p>Static Connection      getConnection(String url,String user,String password)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code><strong>\u53c2\u6570<\/strong><br> String url=\"jdbc:mysql:\/\/ip\u5730\u5740\uff08\u57df\u540d\uff09:\u7aef\u53e3\u53f7\/\u6570\u636e\u5e93\u540d\u79f0\";<br>        String username=\"\u7528\u6237\u540d\";<br>        String password=\"\u5bc6\u7801\";<\/code><\/pre>\n\n\n\n<p><strong>\u7ec6\u8282\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u8fde\u63a5\u7684\u662f\u672c\u673amysql\u670d\u52a1\u5668\uff0c\u5e76\u4e14MySQL\u670d\u52a1\u5668\u9ed8\u8ba4\u7aef\u53e3\u662f3306\uff0c\u5219url\u53ef\u4ee5\u7b80\u5199\u4e3a\uff1ajdbc:mysql:\/\/\/\u6570\u636e\u5e93\u540d\u79f0\uff1f\u53c2\u6570\u952e\u503c\u5bf9<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679cuseSSL=false\u53c2\u6570\uff0c\u7981\u7528\u5b89\u5168\u94fe\u63a5\u65b9\u5f0f\uff0c\u89e3\u51b3\u8b66\u544a\u63d0\u793a<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Connection<\/strong><\/h2>\n\n\n\n<p><strong>Connection(\u6570\u636e\u5e93\u8fde\u63a5\u5bf9\u8c61)\u4f5c\u7528\uff1a<\/strong><\/p>\n\n\n\n<p><strong>1.\u83b7\u53d6\u6267\u884cSQL\u7684\u5bf9\u8c61 <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u666e\u901a\u6267\u884cSQL\u5bf9\u8c61\uff1aStatement createStatement(sql)<\/li>\n\n\n\n<li>\u9884\u7f16\u8bd1SQL\u7684\u6267\u884cSQL\u5bf9\u8c61\uff08\u9632\u6b62SQL\u6ce8\u5165\uff09\uff1aPreparedStatement prepareStatement(sql)<\/li>\n\n\n\n<li>\u6267\u884c\u5b58\u50a8\u8fc7\u7a0b\u7684\u5bf9\u8c61\uff1aCallableStatement prepareCall(sql)<\/li>\n<\/ul>\n\n\n\n<p><strong>2.\u7ba1\u7406\u4e8b\u52a1<\/strong><\/p>\n\n\n\n<p>MySQL\u4e8b\u52a1\u7ba1\u7406<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-5-1024x190.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"190\" data-original=\"http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-5-1024x190.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-63\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>JDBC\u4e8b\u52a1\u7ba1\u7406\uff1aConnection\u63a5\u53e3\u4e2d\u5b9a\u4e49\u4e863\u4e2a\u5bf9\u5e94\u7684\u65b9\u6cd5<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-6-1024x123.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"123\" data-original=\"http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-6-1024x123.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-64\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Statement<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f5c\u7528\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u6267\u884cSQL\u8bed\u53e5<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-7.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"806\" height=\"193\" data-original=\"http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-7.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-67\"  sizes=\"auto, (max-width: 806px) 100vw, 806px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>\u7c7b\u522b<\/td><td>\u5168\u79f0<\/td><td>\u4e2d\u6587<\/td><td>\u76ee\u7684<\/td><td>\u4e3b\u8981\u547d\u4ee4<\/td><td>\u4e8b\u52a1<\/td><\/tr><tr><td>DDL<\/td><td>Data Definition Language<\/td><td>\u6570\u636e\u5b9a\u4e49\u8bed\u8a00<\/td><td>\u5b9a\u4e49\u548c\u7ba1\u7406\u6570\u636e\u5e93\u7ed3\u6784<\/td><td><strong>CREATE,ALTER,DROP<\/strong>,TRUNCATE,RENAME<\/td><td>\u81ea\u52a8\u63d0\u4ea4<\/td><\/tr><tr><td>DML<\/td><td>Data Manipulation Language<\/td><td>\u6570\u636e\u64cd\u4f5c\u8bed\u8a00<\/td><td>\u64cd\u4f5c\u548c\u7ba1\u7406\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e(\u589e\u3001\u5220\u3001\u6539)<\/td><td><strong>INSERT,UPDATE,DELETE<\/strong>,MERGE,CALL<\/td><td>\u53ef\u56de\u6eda<\/td><\/tr><tr><td>DQL<\/td><td>Data Query Language<\/td><td>\u6570\u636e\u67e5\u8be2\u8bed\u8a00<\/td><td>\u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\/\u68c0\u7d22\u6570\u636e<\/td><td><strong>SELECT<\/strong><\/td><td>\u53ef\u56de\u6eda<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">\u6ce8\u610f\uff1a<strong>DQL<\/strong>\u672c\u8d28\u4e0a\u5c5e\u4e8e<strong>DML<\/strong>\u7684\u4e00\u4e2a\u5b50\u96c6\uff0c\u4f46\u56e0\u4e3a<strong>SELECT<\/strong>\u8bed\u53e5\u6781\u5176\u91cd\u8981\u4e14\u4f7f\u7528\u9891\u7387\u6700\u9ad8\uff0c\u6240\u4ee5\u901a\u5e38\u88ab\u5355\u72ec\u5206\u7c7b<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">ResultSet<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f5c\u7528\uff1a<\/li>\n<\/ul>\n\n\n\n<p>\u5c01\u88c5\u4e86DQL\u67e5\u8be2\u8bed\u53e5\u7684\u7ed3\u679c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-8.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"927\" height=\"61\" data-original=\"http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-8.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-74\"  sizes=\"auto, (max-width: 927px) 100vw, 927px\" \/><\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u83b7\u53d6\u67e5\u8be2\u7ed3\u679c<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-9-1024x351.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"351\" data-original=\"http:\/\/caihh.top\/wp-content\/uploads\/2025\/09\/image-9-1024x351.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-75\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">PreparedStatement<\/h2>\n\n\n\n<p>\u4f5c\u7528\uff1a<br>\u9884\u7f16\u8bd1SQL\u5e76\u6267\u884cSQL\u8bed\u53e5<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u83b7\u53d6PreparedStatement\u5bf9\u8c61<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/SQL\u8bed\u53e5\u4e2d\u7684\u53c2\u6570\u503c\uff0c\u4f7f\u7528\uff1f\u5360\u4f4d\u7b26\u66ff\u4ee3\nString sql=\"select * from user where usename = \uff1f and password = \uff1f\";\n\n\/\/\u901a\u8fc7Connection\u5bf9\u8c61\u83b7\u53d6\uff0c\u5e76\u4f20\u5165\u5bf9\u5e94\u7684sql\u8bed\u53e5\nPreparedStatement pstmt = conn.prepareStatement(sql);<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8bbe\u7f6e\u53c2\u6570\u503c<\/li>\n<\/ul>\n\n\n\n<p>PreparedStatement\u5bf9\u8c61\uff1asetXxx(\u53c2\u65701\uff0c\u53c2\u65702): \u7ed9 \uff1f \u8d4b\u503c<\/p>\n\n\n\n<p>Xxx\uff1a\u6570\u636e\u7c7b\u578b \uff1b \u5982setInt (\u53c2\u65701\uff0c\u53c2\u65702)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6267\u884cSQL<\/li>\n<\/ul>\n\n\n\n<p>executeUpdat();\/executeQuery(); :\u4e0d\u9700\u8981\u5728\u4f20\u9012sql<\/p>\n\n\n\n<p>\u597d\u5904\uff1a<\/p>\n\n\n\n<p>1.\u9884\u7f16\u8bd1SQL\uff0c\u6027\u80fd\u66f4\u9ad8<\/p>\n\n\n\n<p>2.\u9632\u6b62SQL\u6ce8\u5165\uff1a<strong>\u5c06\u654f\u611f\u5b57\u7b26\u8fdb\u884c\u8f6c\u4e49<\/strong><\/p>\n\n\n\n<p>PreparedStatement\u9884\u7f16\u8bd1\u529f\u80fd\u5f00\u542f\uff1auseServerPrepStmts=ture<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6570\u636e\u5e93\u8fde\u63a5\u6c60<\/h2>\n\n\n\n<p>\u6807\u51c6\u63a5\u53e3\uff1a<strong>DataSource<\/strong>(\u83b7\u53d6\u8fde\u63a5)<\/p>\n\n\n\n<p>Connection getConnection()<\/p>\n\n\n\n<p>\u5e38\u89c1\u7684\u6570\u636e\u5e93\u8fde\u63a5\u6c60\uff1aDBCP\u3001C3P0\u3001<strong>Druid<\/strong>(Druid\u8fde\u63a5\u6c60\u662f\u963f\u91cc\u5df4\u5df4\u5f00\u6e90\u7684\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u9879\u76ee\uff1b\u529f\u80fd\u5f3a\u5927\uff0c\u6027\u80fd\u4f18\u79c0\uff0c\u662fJava\u8bed\u8a00\u6700\u597d\u7684\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u4e4b\u4e00)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Druid<\/h2>\n\n\n\n<p>1.\u5bfc\u5165jar\u5305 druid-1.1.12.jar<\/p>\n\n\n\n<p>2.\u5b9a\u4e49\u914d\u7f6e\u6587\u4ef6<\/p>\n\n\n\n<p>3.\u52a0\u8f7d\u914d\u7f6e\u6587\u4ef6<\/p>\n\n\n\n<p>4.\u83b7\u53d6\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u5bf9\u8c61<\/p>\n\n\n\n<p>5.\u83b7\u53d6\u8fde\u63a5<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u8be6\u7ec6\u64cd\u4f5c\u5728<a href=\"https:\/\/www.bilibili.com\/video\/BV1Qf4y1T7Hx\/?spm_id_from=333.1391.0.0&amp;p=38&amp;vd_source=aafd3404d314c499141ed9c032030735\">09-\u6570\u636e\u5e93\u8fde\u63a5\u6c60-\u7b80\u4ecb&amp;Druid\u4f7f\u7528_\u54d4\u54e9\u54d4\u54e9_bilibili<\/a>\u76847\uff1a13\u8fdb\u5ea6\u6761<\/p>\n\n\n<h1 class=\"wp-block-site-title\"><a href=\"https:\/\/caihh.top\" target=\"_self\" rel=\"home\">CAIHUANHUAN<\/a><\/h1>\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u5ff5\uff1a \u6b65\u9aa4 1.\u521b\u5efa\u5de5\u7a0b\uff0c\u5bfc\u5165\u9a71\u52a8jar\u5305&#8211;&gt;mysql-connector-java-5 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":35,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn"],"_links":{"self":[{"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/posts\/44","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/comments?post=44"}],"version-history":[{"count":22,"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/posts\/44\/revisions"}],"predecessor-version":[{"id":113,"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/posts\/44\/revisions\/113"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/media\/35"}],"wp:attachment":[{"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/media?parent=44"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/categories?post=44"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/caihh.top\/index.php\/wp-json\/wp\/v2\/tags?post=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}