{"id":61835,"date":"2024-10-13T14:05:17","date_gmt":"2024-10-13T06:05:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61835\/"},"modified":"2024-10-13T14:05:17","modified_gmt":"2024-10-13T06:05:17","slug":"java-mvc%e6%9e%b6%e6%a7%8b%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%e6%8a%80%e5%b7%a7-java-mvc%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61835\/","title":{"rendered":"Java MVC\u67b6\u69cb\u4e2d\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u6280\u5de7 (java mvc\u6578\u64da\u5eab\u64cd\u4f5c)"},"content":{"rendered":"<h1 id=\"java-mvc%e6%9e%b6%e6%a7%8b%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%e6%8a%80%e5%b7%a7-KjrPtqdIzN\">Java MVC\u67b6\u69cb\u4e2d\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u6280\u5de7<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u8edf\u9ad4\u958b\u767c\u4e2d\uff0cJava MVC\uff08Model-View-Controller\uff09\u67b6\u69cb\u5df2\u6210\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u8a2d\u8a08\u6a21\u5f0f\u3002\u9019\u7a2e\u67b6\u69cb\u5c07\u61c9\u7528\u7a0b\u5f0f\u7684\u908f\u8f2f\u3001\u7528\u6236\u754c\u9762\u548c\u6578\u64da\u7ba1\u7406\u5206\u958b\uff0c\u4f7f\u5f97\u958b\u767c\u548c\u7dad\u8b77\u8b8a\u5f97\u66f4\u52a0\u9ad8\u6548\u3002\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u5728Java MVC\u67b6\u69cb\u4e2d\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u4e00\u4e9b\u6280\u5de7\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7ba1\u7406\u6578\u64da\u3002<\/p>\n<h2 id=\"1-%e7%90%86%e8%a7%a3mvc%e6%9e%b6%e6%a7%8b-KjrPtqdIzN\">1. \u7406\u89e3MVC\u67b6\u69cb<\/h2>\n<p>\u5728\u6df1\u5165\u6578\u64da\u5eab\u64cd\u4f5c\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u7406\u89e3MVC\u67b6\u69cb\u7684\u57fa\u672c\u7d44\u6210\u90e8\u5206\uff1a<\/p>\n<ul>\n<li><strong>Model\uff1a<\/strong>\u8ca0\u8cac\u6578\u64da\u7684\u7ba1\u7406\u548c\u696d\u52d9\u908f\u8f2f\uff0c\u901a\u5e38\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002<\/li>\n<li><strong>View\uff1a<\/strong>\u7528\u65bc\u986f\u793a\u6578\u64da\u7684\u7528\u6236\u754c\u9762\uff0c\u901a\u5e38\u662fHTML\u9801\u9762\u3002<\/li>\n<li><strong>Controller\uff1a<\/strong>\u8655\u7406\u7528\u6236\u7684\u8acb\u6c42\uff0c\u4e26\u8abf\u7528\u76f8\u61c9\u7684Model\u548cView\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-KjrPtqdIzN\">2. \u6578\u64da\u5eab\u9023\u63a5<\/h2>\n<p>\u5728Java\u4e2d\uff0c\u6578\u64da\u5eab\u64cd\u4f5c\u901a\u5e38\u4f7f\u7528JDBC\uff08Java Database Connectivity\uff09\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u6578\u64da\u5eab\u9023\u63a5\u793a\u4f8b\uff1a<\/p>\n<pre><code>import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.SQLException;\n\npublic class DatabaseConnection {\n    private static final String URL = \"jdbc:mysql:\/\/localhost:3306\/your_database\";\n    private static final String USER = \"your_username\";\n    private static final String PASSWORD = \"your_password\";\n\n    public static Connection getConnection() throws SQLException {\n        return DriverManager.getConnection(URL, USER, PASSWORD);\n    }\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528DriverManager\u4f86\u7372\u53d6\u6578\u64da\u5eab\u9023\u63a5\u3002\u8acb\u6839\u64da\u5be6\u969b\u60c5\u6cc1\u66ff\u63dbURL\u3001USER\u548cPASSWORD\u3002<\/p>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8dao%e6%a8%a1%e5%bc%8f-KjrPtqdIzN\">3. \u4f7f\u7528DAO\u6a21\u5f0f<\/h2>\n<p>\u70ba\u4e86\u63d0\u9ad8\u4ee3\u78bc\u7684\u53ef\u7dad\u8b77\u6027\u548c\u53ef\u91cd\u7528\u6027\uff0c\u5efa\u8b70\u4f7f\u7528DAO\uff08Data Access Object\uff09\u6a21\u5f0f\u4f86\u5c01\u88dd\u6578\u64da\u5eab\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684DAO\u793a\u4f8b\uff1a<\/p>\n<pre><code>import java.sql.Connection;\nimport java.sql.PreparedStatement;\nimport java.sql.ResultSet;\nimport java.sql.SQLException;\n\npublic class UserDAO {\n    public void addUser(User user) {\n        String sql = \"INSERT INTO users (name, email) VALUES (?, ?)\";\n        try (Connection conn = DatabaseConnection.getConnection();\n             PreparedStatement pstmt = conn.prepareStatement(sql)) {\n            pstmt.setString(1, user.getName());\n            pstmt.setString(2, user.getEmail());\n            pstmt.executeUpdate();\n        } catch (SQLException e) {\n            e.printStackTrace();\n        }\n    }\n\n    public User getUser(int id) {\n        String sql = \"SELECT * FROM users WHERE id = ?\";\n        User user = null;\n        try (Connection conn = DatabaseConnection.getConnection();\n             PreparedStatement pstmt = conn.prepareStatement(sql)) {\n            pstmt.setInt(1, id);\n            ResultSet rs = pstmt.executeQuery();\n            if (rs.next()) {\n                user = new User(rs.getInt(\"id\"), rs.getString(\"name\"), rs.getString(\"email\"));\n            }\n        } catch (SQLException e) {\n            e.printStackTrace();\n        }\n        return user;\n    }\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500bUserDAO\u985e\uff0c\u8a72\u985e\u5305\u542b\u6dfb\u52a0\u7528\u6236\u548c\u7372\u53d6\u7528\u6236\u7684\u65b9\u6cd5\u3002\u9019\u6a23\u7684\u8a2d\u8a08\u4f7f\u5f97\u6578\u64da\u5eab\u64cd\u4f5c\u8207\u696d\u52d9\u908f\u8f2f\u5206\u96e2\uff0c\u4fbf\u65bc\u5f8c\u671f\u7dad\u8b77\u3002<\/p>\n<h2 id=\"4-%e4%ba%8b%e5%8b%99%e7%ae%a1%e7%90%86-KjrPtqdIzN\">4. \u4e8b\u52d9\u7ba1\u7406<\/h2>\n<p>\u5728\u9032\u884c\u591a\u500b\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u4e8b\u52d9\u7ba1\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4f7f\u7528\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5728DAO\u4e2d\u5be6\u73fe\u4e8b\u52d9\u7ba1\u7406\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>public void addUserWithTransaction(User user1, User user2) {\n    String sql1 = \"INSERT INTO users (name, email) VALUES (?, ?)\";\n    String sql2 = \"INSERT INTO users (name, email) VALUES (?, ?)\";\n    try (Connection conn = DatabaseConnection.getConnection()) {\n        conn.setAutoCommit(false); \/\/ \u958b\u59cb\u4e8b\u52d9\n\n        try (PreparedStatement pstmt1 = conn.prepareStatement(sql1);\n             PreparedStatement pstmt2 = conn.prepareStatement(sql2)) {\n            pstmt1.setString(1, user1.getName());\n            pstmt1.setString(2, user1.getEmail());\n            pstmt1.executeUpdate();\n\n            pstmt2.setString(1, user2.getName());\n            pstmt2.setString(2, user2.getEmail());\n            pstmt2.executeUpdate();\n\n            conn.commit(); \/\/ \u63d0\u4ea4\u4e8b\u52d9\n        } catch (SQLException e) {\n            conn.rollback(); \/\/ \u56de\u6efe\u4e8b\u52d9\n            e.printStackTrace();\n        }\n    } catch (SQLException e) {\n        e.printStackTrace();\n    }\n}\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86\u4e8b\u52d9\u4f86\u78ba\u4fdd\u5169\u500b\u7528\u6236\u7684\u6dfb\u52a0\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002<\/p>\n<h2 id=\"5-%e7%b8%bd%e7%b5%90-KjrPtqdIzN\">5. \u7e3d\u7d50<\/h2>\n<p>\u5728Java MVC\u67b6\u69cb\u4e2d\uff0c\u6578\u64da\u5eab\u64cd\u4f5c\u662f\u61c9\u7528\u7a0b\u5f0f\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002\u901a\u904e\u4f7f\u7528JDBC\u3001DAO\u6a21\u5f0f\u548c\u4e8b\u52d9\u7ba1\u7406\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\uff0c\u63d0\u5347\u61c9\u7528\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002\u9019\u4e9b\u6280\u5de7\u4e0d\u50c5\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u90e8\u7f72\u60a8\u7684Java\u61c9\u7528\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Java MVC\u67b6\u69cb\u4e2d\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u512a\u5316\u61c9\u7528\u6027\u80fd\uff0c\u5be6\u73fe\u9ad8\u6548\u958b\u767c\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-61835","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61835","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=61835"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61835\/revisions"}],"predecessor-version":[{"id":61836,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61835\/revisions\/61836"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61835"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61835"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61835"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}