{"id":2288,"date":"2025-03-03T23:31:27","date_gmt":"2025-03-03T15:31:27","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2288"},"modified":"2025-03-03T23:31:27","modified_gmt":"2025-03-03T15:31:27","slug":"java-mysql-%e8%bf%9e%e6%8e%a5","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/03\/java-mysql-%e8%bf%9e%e6%8e%a5\/","title":{"rendered":"Java MySQL \u8fde\u63a5"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728 Java \u4e2d\u8fde\u63a5 MySQL \u6570\u636e\u5e93\u901a\u5e38\u9700\u8981\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5b89\u88c5 MySQL JDBC \u9a71\u52a8\u7a0b\u5e8f<\/strong>\uff1a\u4f60\u9700\u8981\u4e0b\u8f7d\u5e76\u5f15\u5165 MySQL JDBC \u9a71\u52a8\uff0c\u901a\u5e38\u662f <code>mysql-connector-java<\/code>\u3002<\/li>\n\n\n\n<li><strong>\u52a0\u8f7d JDBC \u9a71\u52a8<\/strong>\uff1a\u5728 Java \u4e2d\u4f7f\u7528 JDBC \u8fde\u63a5\u6570\u636e\u5e93\u65f6\uff0c\u9996\u5148\u9700\u8981\u52a0\u8f7d MySQL \u7684 JDBC \u9a71\u52a8\u3002<\/li>\n\n\n\n<li><strong>\u521b\u5efa\u6570\u636e\u5e93\u8fde\u63a5<\/strong>\uff1a\u4f7f\u7528 <code>DriverManager<\/code> \u7c7b\u521b\u5efa\u6570\u636e\u5e93\u8fde\u63a5\u3002<\/li>\n\n\n\n<li><strong>\u6267\u884c SQL \u67e5\u8be2<\/strong>\uff1a\u901a\u8fc7 <code>Statement<\/code> \u6216 <code>PreparedStatement<\/code> \u6267\u884c SQL \u67e5\u8be2\u3002<\/li>\n\n\n\n<li><strong>\u5904\u7406\u7ed3\u679c\u96c6<\/strong>\uff1a\u4f7f\u7528 <code>ResultSet<\/code> \u83b7\u53d6\u67e5\u8be2\u7ed3\u679c\u3002<\/li>\n\n\n\n<li><strong>\u5173\u95ed\u8fde\u63a5<\/strong>\uff1a\u5728\u7a0b\u5e8f\u7ed3\u675f\u65f6\u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. \u6dfb\u52a0 MySQL JDBC \u9a71\u52a8<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u4f7f\u7528 Maven\uff0c\u53ef\u4ee5\u5728 <code>pom.xml<\/code> \u4e2d\u6dfb\u52a0 MySQL JDBC \u9a71\u52a8\u7684\u4f9d\u8d56\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;dependency&gt;\n    &lt;groupId&gt;mysql&lt;\/groupId&gt;\n    &lt;artifactId&gt;mysql-connector-java&lt;\/artifactId&gt;\n    &lt;version&gt;8.0.23&lt;\/version&gt; &lt;!-- \u7248\u672c\u53f7\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8c03\u6574 --&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6ca1\u6709\u4f7f\u7528 Maven\uff0c\u53ef\u4ee5\u624b\u52a8\u4e0b\u8f7d <a href=\"https:\/\/dev.mysql.com\/downloads\/connector\/j\/\">MySQL JDBC \u9a71\u52a8<\/a> \u5e76\u5c06 JAR \u6587\u4ef6\u6dfb\u52a0\u5230\u7c7b\u8def\u5f84\u4e2d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. \u521b\u5efa\u6570\u636e\u5e93\u8fde\u63a5<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.SQLException;\n\npublic class MySQLConnectionExample {\n    public static void main(String&#91;] args) {\n        \/\/ \u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\n        String url = \"jdbc:mysql:\/\/localhost:3306\/mydatabase\"; \/\/ \u6570\u636e\u5e93 URL\n        String user = \"root\"; \/\/ \u6570\u636e\u5e93\u7528\u6237\u540d\n        String password = \"password\"; \/\/ \u6570\u636e\u5e93\u5bc6\u7801\n\n        \/\/ \u8fde\u63a5\u6570\u636e\u5e93\n        try {\n            \/\/ \u52a0\u8f7d JDBC \u9a71\u52a8\n            Class.forName(\"com.mysql.cj.jdbc.Driver\");\n\n            \/\/ \u521b\u5efa\u8fde\u63a5\n            Connection conn = DriverManager.getConnection(url, user, password);\n\n            System.out.println(\"\u6210\u529f\u8fde\u63a5\u5230\u6570\u636e\u5e93\uff01\");\n\n            \/\/ \u8fd9\u91cc\u53ef\u4ee5\u6267\u884c SQL \u67e5\u8be2\u3001\u66f4\u65b0\u7b49\u64cd\u4f5c\n\n            \/\/ \u5173\u95ed\u8fde\u63a5\n            conn.close();\n        } catch (ClassNotFoundException e) {\n            System.out.println(\"JDBC \u9a71\u52a8\u672a\u627e\u5230\");\n            e.printStackTrace();\n        } catch (SQLException e) {\n            System.out.println(\"\u6570\u636e\u5e93\u8fde\u63a5\u5931\u8d25\");\n            e.printStackTrace();\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. \u6267\u884c SQL \u67e5\u8be2<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528 <code>Statement<\/code> \u6216 <code>PreparedStatement<\/code> \u6267\u884c SQL \u67e5\u8be2\u3002\u63a8\u8350\u4f7f\u7528 <code>PreparedStatement<\/code>\uff0c\u5b83\u53ef\u4ee5\u9632\u6b62 SQL \u6ce8\u5165\u5e76\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4f7f\u7528 <code>Statement<\/code> \u6267\u884c\u67e5\u8be2\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.sql.*;\n\npublic class StatementExample {\n    public static void main(String&#91;] args) {\n        String url = \"jdbc:mysql:\/\/localhost:3306\/mydatabase\";\n        String user = \"root\";\n        String password = \"password\";\n\n        try {\n            \/\/ \u52a0\u8f7d JDBC \u9a71\u52a8\u5e76\u521b\u5efa\u8fde\u63a5\n            Connection conn = DriverManager.getConnection(url, user, password);\n\n            \/\/ \u521b\u5efa Statement \u5bf9\u8c61\n            Statement stmt = conn.createStatement();\n\n            \/\/ \u6267\u884c\u67e5\u8be2\n            String sql = \"SELECT * FROM employees\";\n            ResultSet rs = stmt.executeQuery(sql);\n\n            \/\/ \u5904\u7406\u7ed3\u679c\u96c6\n            while (rs.next()) {\n                int id = rs.getInt(\"id\");\n                String name = rs.getString(\"name\");\n                System.out.println(\"ID: \" + id + \", Name: \" + name);\n            }\n\n            \/\/ \u5173\u95ed\u8fde\u63a5\n            rs.close();\n            stmt.close();\n            conn.close();\n        } catch (SQLException e) {\n            e.printStackTrace();\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4f7f\u7528 <code>PreparedStatement<\/code> \u6267\u884c\u67e5\u8be2\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.sql.*;\n\npublic class PreparedStatementExample {\n    public static void main(String&#91;] args) {\n        String url = \"jdbc:mysql:\/\/localhost:3306\/mydatabase\";\n        String user = \"root\";\n        String password = \"password\";\n\n        try {\n            \/\/ \u52a0\u8f7d JDBC \u9a71\u52a8\u5e76\u521b\u5efa\u8fde\u63a5\n            Connection conn = DriverManager.getConnection(url, user, password);\n\n            \/\/ \u521b\u5efa PreparedStatement\n            String sql = \"SELECT * FROM employees WHERE id = ?\";\n            PreparedStatement pstmt = conn.prepareStatement(sql);\n            pstmt.setInt(1, 1);  \/\/ \u8bbe\u7f6e\u67e5\u8be2\u53c2\u6570\n\n            \/\/ \u6267\u884c\u67e5\u8be2\n            ResultSet rs = pstmt.executeQuery();\n\n            \/\/ \u5904\u7406\u7ed3\u679c\u96c6\n            if (rs.next()) {\n                int id = rs.getInt(\"id\");\n                String name = rs.getString(\"name\");\n                System.out.println(\"ID: \" + id + \", Name: \" + name);\n            }\n\n            \/\/ \u5173\u95ed\u8fde\u63a5\n            rs.close();\n            pstmt.close();\n            conn.close();\n        } catch (SQLException e) {\n            e.printStackTrace();\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. \u5904\u7406\u6570\u636e\u5e93\u7ed3\u679c\u96c6<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u67e5\u8be2\u7ed3\u679c\u901a\u8fc7 <code>ResultSet<\/code> \u8fd4\u56de\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 <code>ResultSet<\/code> \u5bf9\u8c61\u6765\u8bbf\u95ee\u6570\u636e\u5e93\u8fd4\u56de\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>rs.getInt(\"column_name\")<\/code>: \u83b7\u53d6\u6574\u6570\u7c7b\u578b\u7684\u5217\u6570\u636e\u3002<\/li>\n\n\n\n<li><code>rs.getString(\"column_name\")<\/code>: \u83b7\u53d6\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u5217\u6570\u636e\u3002<\/li>\n\n\n\n<li><code>rs.next()<\/code>: \u79fb\u52a8\u5230\u4e0b\u4e00\u884c\u7ed3\u679c\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. \u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5b8c\u6210\u6570\u636e\u5e93\u64cd\u4f5c\u540e\uff0c\u52a1\u5fc5\u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5\uff0c<code>ResultSet<\/code> \u548c <code>Statement<\/code> \u5bf9\u8c61\u4e5f\u5e94\u5173\u95ed\uff0c\u4ee5\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>rs.close();\nstmt.close();\nconn.close();<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>6. \u5f02\u5e38\u5904\u7406<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6570\u636e\u5e93\u64cd\u4f5c\u4e2d\uff0c\u53ef\u80fd\u4f1a\u9047\u5230 <code>SQLException<\/code>\uff0c\u56e0\u6b64\u5e94\u6355\u83b7\u8be5\u5f02\u5e38\u5e76\u8fdb\u884c\u9002\u5f53\u7684\u5904\u7406\u3002\u53ef\u4ee5\u901a\u8fc7 <code>e.printStackTrace()<\/code> \u8f93\u51fa\u5f02\u5e38\u4fe1\u606f\uff0c\u6216\u6839\u636e\u4e1a\u52a1\u9700\u6c42\u505a\u8fdb\u4e00\u6b65\u5904\u7406\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u603b\u7ed3<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4f7f\u7528 JDBC \u9a71\u52a8\u8fde\u63a5 MySQL\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528 <code>Connection<\/code> \u5bf9\u8c61\u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5\u3002<\/li>\n\n\n\n<li>\u901a\u8fc7 <code>Statement<\/code> \u6216 <code>PreparedStatement<\/code> \u6267\u884c SQL \u67e5\u8be2\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528 <code>ResultSet<\/code> \u5904\u7406\u67e5\u8be2\u7ed3\u679c\u3002<\/li>\n\n\n\n<li>\u5b8c\u6210\u540e\uff0c\u8bb0\u5f97\u5173\u95ed\u8fde\u63a5\u3001<code>ResultSet<\/code> \u548c <code>Statement<\/code>\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Java \u4e2d\u8fde\u63a5 MySQL \u6570\u636e\u5e93\u901a\u5e38\u9700\u8981\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a 1. \u6dfb\u52a0 MySQL JDBC \u9a71\u52a8 \u5982\u679c\u4f60 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68],"tags":[],"class_list":["post-2288","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2288","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2288"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2288\/revisions"}],"predecessor-version":[{"id":2289,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2288\/revisions\/2289"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2288"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2288"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2288"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}