{"id":62037,"date":"2024-10-13T15:40:17","date_gmt":"2024-10-13T07:40:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/62037\/"},"modified":"2024-10-13T15:40:17","modified_gmt":"2024-10-13T07:40:17","slug":"java%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%96%e9%8d%b5%ef%bc%8c%e7%b6%ad%e8%ad%b7%e6%95%b8%e6%93%9a%e5%ae%8c%e6%95%b4%e6%80%a7-java%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%96%e9%8d%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/62037\/","title":{"rendered":"Java\u5be6\u73fe\u6578\u64da\u5eab\u5916\u9375\uff0c\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027 (java\u6578\u64da\u5eab\u5916\u9375)"},"content":{"rendered":"<h1 id=\"java%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%96%e9%8d%b5%ef%bc%8c%e7%b6%ad%e8%ad%b7%e6%95%b8%e6%93%9a%e5%ae%8c%e6%95%b4%e6%80%a7-PHsPJTkVgW\">Java\u5be6\u73fe\u6578\u64da\u5eab\u5916\u9375\uff0c\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027<\/h1>\n<p>\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u8a2d\u8a08\u8207\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002\u5916\u9375\uff08Foreign Key\uff09\u662f\u95dc\u806f\u6578\u64da\u5eab\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u7528\u65bc\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Java\u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u5916\u9375\uff0c\u4e26\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%a4%96%e9%8d%b5%ef%bc%9f-PHsPJTkVgW\">\u4ec0\u9ebc\u662f\u5916\u9375\uff1f<\/h2>\n<p>\u5916\u9375\u662f\u4e00\u7a2e\u7d04\u675f\uff0c\u7528\u65bc\u5728\u5169\u500b\u8868\u4e4b\u9593\u5efa\u7acb\u95dc\u806f\u3002\u5b83\u6307\u5411\u53e6\u4e00\u500b\u8868\u7684\u4e3b\u9375\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u53c3\u8003\u5b8c\u6574\u6027\u3002\u7576\u4e00\u500b\u8868\u4e2d\u7684\u67d0\u500b\u5b57\u6bb5\u88ab\u8a2d\u7f6e\u70ba\u5916\u9375\u6642\uff0c\u8a72\u5b57\u6bb5\u7684\u503c\u5fc5\u9808\u5728\u88ab\u53c3\u8003\u7684\u8868\u4e2d\u5b58\u5728\u3002\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u51fa\u73fe\u5b64\u7acb\u7684\u6578\u64da\uff0c\u5f9e\u800c\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%a4%96%e9%8d%b5%ef%bc%9f-PHsPJTkVgW\">\u70ba\u4ec0\u9ebc\u9700\u8981\u5916\u9375\uff1f<\/h2>\n<ul>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u5916\u9375\u78ba\u4fdd\u4e86\u6578\u64da\u4e4b\u9593\u7684\u95dc\u806f\u6027\uff0c\u9632\u6b62\u4e86\u4e0d\u4e00\u81f4\u7684\u6578\u64da\u51fa\u73fe\u3002<\/li>\n<li><strong>\u6578\u64da\u4e00\u81f4\u6027\uff1a<\/strong>\u901a\u904e\u5916\u9375\u7d04\u675f\uff0c\u6578\u64da\u5eab\u53ef\u4ee5\u81ea\u52d5\u8655\u7406\u6578\u64da\u7684\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u7c21\u5316\u67e5\u8a62\uff1a<\/strong>\u5916\u9375\u4f7f\u5f97\u5728\u591a\u500b\u8868\u4e4b\u9593\u9032\u884c\u67e5\u8a62\u8b8a\u5f97\u66f4\u52a0\u7c21\u55ae\u548c\u9ad8\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9c%a8java%e4%b8%ad%e5%af%a6%e7%8f%be%e5%a4%96%e9%8d%b5-PHsPJTkVgW\">\u5728Java\u4e2d\u5be6\u73fe\u5916\u9375<\/h2>\n<p>\u5728Java\u4e2d\uff0c\u6211\u5011\u901a\u5e38\u4f7f\u7528JDBC\uff08Java Database Connectivity\uff09\u4f86\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728MySQL\u6578\u64da\u5eab\u4e2d\u5275\u5efa\u5916\u9375\u3002<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8-PHsPJTkVgW\">1. \u5275\u5efa\u6578\u64da\u5eab\u8868<\/h3>\n<pre><code>CREATE TABLE department (\n    id INT PRIMARY KEY,\n    name VARCHAR(50) NOT NULL\n);\n\nCREATE TABLE employee (\n    id INT PRIMARY KEY,\n    name VARCHAR(50) NOT NULL,\n    department_id INT,\n    FOREIGN KEY (department_id) REFERENCES department(id)\n);<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u5169\u500b\u8868\uff1a`department`\u548c`employee`\u3002`employee`\u8868\u4e2d\u7684`department_id`\u5b57\u6bb5\u662f\u5916\u9375\uff0c\u6307\u5411`department`\u8868\u7684`id`\u5b57\u6bb5\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8jdbc%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-PHsPJTkVgW\">2. \u4f7f\u7528JDBC\u63d2\u5165\u6578\u64da<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u5c07\u4f7f\u7528JDBC\u5728Java\u4e2d\u63d2\u5165\u6578\u64da\uff0c\u4e26\u78ba\u4fdd\u5916\u9375\u7d04\u675f\u7684\u6b63\u78ba\u6027\u3002<\/p>\n<pre><code>import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.PreparedStatement;\n\npublic class Main {\n    public static void main(String[] args) {\n        String url = \"jdbc:mysql:\/\/localhost:3306\/your_database\";\n        String user = \"your_username\";\n        String password = \"your_password\";\n\n        try (Connection conn = DriverManager.getConnection(url, user, password)) {\n            String insertDepartment = \"INSERT INTO department (id, name) VALUES (?, ?)\";\n            try (PreparedStatement pstmt = conn.prepareStatement(insertDepartment)) {\n                pstmt.setInt(1, 1);\n                pstmt.setString(2, \"HR\");\n                pstmt.executeUpdate();\n            }\n\n            String insertEmployee = \"INSERT INTO employee (id, name, department_id) VALUES (?, ?, ?)\";\n            try (PreparedStatement pstmt = conn.prepareStatement(insertEmployee)) {\n                pstmt.setInt(1, 1);\n                pstmt.setString(2, \"John Doe\");\n                pstmt.setInt(3, 1); \/\/ department_id must exist in department table\n                pstmt.executeUpdate();\n            }\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9996\u5148\u63d2\u5165\u4e00\u500b\u90e8\u9580\uff0c\u7136\u5f8c\u63d2\u5165\u4e00\u500b\u54e1\u5de5\uff0c\u4e26\u5c07\u5176`department_id`\u8a2d\u7f6e\u70ba\u5df2\u5b58\u5728\u7684\u90e8\u9580ID\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5916\u9375\u7d04\u675f\u7684\u6b63\u78ba\u6027\u3002<\/p>\n<h2 id=\"%e7%b6%ad%e8%ad%b7%e6%95%b8%e6%93%9a%e5%ae%8c%e6%95%b4%e6%80%a7-PHsPJTkVgW\">\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027\u4e0d\u50c5\u50c5\u4f9d\u8cf4\u65bc\u5916\u9375\u7d04\u675f\uff0c\u9084\u9700\u8981\u8003\u616e\u5176\u4ed6\u56e0\u7d20\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li><strong>\u4e8b\u52d9\u7ba1\u7406\uff1a<\/strong>\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u4e00\u7d44\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002<\/li>\n<li><strong>\u6578\u64da\u9a57\u8b49\uff1a<\/strong>\u5728\u61c9\u7528\u5c64\u9032\u884c\u6578\u64da\u9a57\u8b49\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u6709\u6548\u6027\u3002<\/li>\n<li><strong>\u5b9a\u671f\u6aa2\u67e5\uff1a<\/strong>\u5b9a\u671f\u6aa2\u67e5\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u78ba\u4fdd\u6c92\u6709\u5b64\u7acb\u7684\u8a18\u9304\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-PHsPJTkVgW\">\u7e3d\u7d50<\/h2>\n<p>\u5916\u9375\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u626e\u6f14\u8457\u91cd\u8981\u89d2\u8272\uff0c\u80fd\u5920\u6709\u6548\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u5728Java\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u901a\u904eJDBC\u8f15\u9b06\u5be6\u73fe\u5916\u9375\u7d04\u675f\uff0c\u4e26\u5728\u6578\u64da\u64cd\u4f5c\u4e2d\u9075\u5faa\u76f8\u95dc\u898f\u5247\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u6b63\u78ba\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u548c\u670d\u52d9\u5668\u74b0\u5883\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u6216\u5176\u4ed6 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728Java\u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u5916\u9375\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u554f\u984c\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-62037","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62037","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=62037"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62037\/revisions"}],"predecessor-version":[{"id":62038,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62037\/revisions\/62038"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=62037"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=62037"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=62037"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}