{"id":61847,"date":"2024-10-13T14:11:19","date_gmt":"2024-10-13T06:11:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61847\/"},"modified":"2024-10-13T14:11:19","modified_gmt":"2024-10-13T06:11:19","slug":"java%e5%af%a6%e7%8f%be%e7%b6%b2%e7%b5%a1%e8%b3%bc%e7%a5%a8%e7%b3%bb%e7%b5%b1%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bb%a3%e7%a2%bc-java%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b6%b2%e7%b5%a1%e8%b3%bc%e7%a5%a8%e7%b3%bb","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61847\/","title":{"rendered":"Java\u5be6\u73fe\u7db2\u7d61\u8cfc\u7968\u7cfb\u7d71\u6578\u64da\u5eab\u4ee3\u78bc (java\u6578\u64da\u5eab\u7db2\u7d61\u8cfc\u7968\u7cfb\u7d71\u4ee3\u78bc)"},"content":{"rendered":"<h1 id=\"java%e5%af%a6%e7%8f%be%e7%b6%b2%e7%b5%a1%e8%b3%bc%e7%a5%a8%e7%b3%bb%e7%b5%b1%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bb%a3%e7%a2%bc-auvzNqhXGx\">Java\u5be6\u73fe\u7db2\u7d61\u8cfc\u7968\u7cfb\u7d71\u6578\u64da\u5eab\u4ee3\u78bc<\/h1>\n<p>\u96a8\u8457\u7db2\u7d61\u6280\u8853\u7684\u8fc5\u901f\u767c\u5c55\uff0c\u7db2\u7d61\u8cfc\u7968\u7cfb\u7d71\u5df2\u6210\u70ba\u73fe\u4ee3\u5546\u696d\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u9019\u4e9b\u7cfb\u7d71\u4e0d\u50c5\u63d0\u9ad8\u4e86\u8cfc\u7968\u7684\u4fbf\u5229\u6027\uff0c\u9084\u80fd\u6709\u6548\u7ba1\u7406\u7968\u52d9\u6578\u64da\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Java\u5be6\u73fe\u4e00\u500b\u7c21\u55ae\u7684\u7db2\u7d61\u8cfc\u7968\u7cfb\u7d71\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u6578\u64da\u5eab\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e7%b3%bb%e7%b5%b1%e6%9e%b6%e6%a7%8b%e6%a6%82%e8%bf%b0-auvzNqhXGx\">\u7cfb\u7d71\u67b6\u69cb\u6982\u8ff0<\/h2>\n<p>\u4e00\u500b\u5178\u578b\u7684\u7db2\u7d61\u8cfc\u7968\u7cfb\u7d71\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u4e3b\u8981\u7d44\u4ef6\uff1a<\/p>\n<ul>\n<li>\u7528\u6236\u754c\u9762\uff1a\u7528\u65bc\u986f\u793a\u53ef\u7528\u7968\u52d9\u548c\u8655\u7406\u7528\u6236\u8acb\u6c42\u3002<\/li>\n<li>\u696d\u52d9\u908f\u8f2f\u5c64\uff1a\u8ca0\u8cac\u8655\u7406\u7528\u6236\u8acb\u6c42\uff0c\u4e26\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002<\/li>\n<li>\u6578\u64da\u5eab\uff1a\u5b58\u5132\u7968\u52d9\u4fe1\u606f\u3001\u7528\u6236\u4fe1\u606f\u548c\u4ea4\u6613\u8a18\u9304\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88-auvzNqhXGx\">\u6578\u64da\u5eab\u8a2d\u8a08<\/h2>\n<p>\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u6211\u5011\u9700\u8981\u8003\u616e\u5230\u4ee5\u4e0b\u5e7e\u500b\u4e3b\u8981\u8868\uff1a<\/p>\n<ul>\n<li><strong>Users<\/strong>\uff1a\u5b58\u5132\u7528\u6236\u4fe1\u606f\u3002<\/li>\n<li><strong>Events<\/strong>\uff1a\u5b58\u5132\u6d3b\u52d5\u4fe1\u606f\u3002<\/li>\n<li><strong>Tickets<\/strong>\uff1a\u5b58\u5132\u7968\u52d9\u4fe1\u606f\u3002<\/li>\n<li><strong>Orders<\/strong>\uff1a\u5b58\u5132\u8a02\u55ae\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u662f\u6bcf\u500b\u8868\u7684\u7c21\u55ae\u7d50\u69cb\uff1a<\/p>\n<pre><code>\nCREATE TABLE Users (\n    user_id INT PRIMARY KEY AUTO_INCREMENT,\n    username VARCHAR(50) NOT NULL,\n    password VARCHAR(50) NOT NULL,\n    email VARCHAR(100) NOT NULL\n);\n\nCREATE TABLE Events (\n    event_id INT PRIMARY KEY AUTO_INCREMENT,\n    event_name VARCHAR(100) NOT NULL,\n    event_date DATETIME NOT NULL,\n    location VARCHAR(100) NOT NULL\n);\n\nCREATE TABLE Tickets (\n    ticket_id INT PRIMARY KEY AUTO_INCREMENT,\n    event_id INT,\n    price DECIMAL(10, 2) NOT NULL,\n    available_quantity INT NOT NULL,\n    FOREIGN KEY (event_id) REFERENCES Events(event_id)\n);\n\nCREATE TABLE Orders (\n    order_id INT PRIMARY KEY AUTO_INCREMENT,\n    user_id INT,\n    ticket_id INT,\n    order_date DATETIME NOT NULL,\n    FOREIGN KEY (user_id) REFERENCES Users(user_id),\n    FOREIGN KEY (ticket_id) REFERENCES Tickets(ticket_id)\n);\n<\/code><\/pre>\n<h2 id=\"java%e4%bb%a3%e7%a2%bc%e7%a4%ba%e4%be%8b-auvzNqhXGx\">Java\u4ee3\u78bc\u793a\u4f8b<\/h2>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u5c07\u5c55\u793a\u5982\u4f55\u4f7f\u7528Java\u9023\u63a5\u6578\u64da\u5eab\u4e26\u57f7\u884c\u57fa\u672c\u7684\u64cd\u4f5c\uff0c\u4f8b\u5982\u67e5\u8a62\u53ef\u7528\u7968\u52d9\u548c\u5275\u5efa\u8a02\u55ae\u3002<\/p>\n<h3 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-auvzNqhXGx\">\u6578\u64da\u5eab\u9023\u63a5<\/h3>\n<pre><code>\nimport 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\/ticket_system\";\n    private static final String USER = \"root\";\n    private static final String PASSWORD = \"password\";\n\n    public static Connection getConnection() throws SQLException {\n        return DriverManager.getConnection(URL, USER, PASSWORD);\n    }\n}\n<\/code><\/pre>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e5%8f%af%e7%94%a8%e7%a5%a8%e5%8b%99-auvzNqhXGx\">\u67e5\u8a62\u53ef\u7528\u7968\u52d9<\/h3>\n<pre><code>\nimport java.sql.Connection;\nimport java.sql.PreparedStatement;\nimport java.sql.ResultSet;\nimport java.sql.SQLException;\n\npublic class TicketService {\n    public void listAvailableTickets() {\n        String sql = \"SELECT * FROM Tickets WHERE available_quantity &gt; 0\";\n        try (Connection conn = DatabaseConnection.getConnection();\n             PreparedStatement pstmt = conn.prepareStatement(sql);\n             ResultSet rs = pstmt.executeQuery()) {\n             \n            while (rs.next()) {\n                System.out.println(\"Ticket ID: \" + rs.getInt(\"ticket_id\") + \n                                   \", Price: \" + rs.getDouble(\"price\") + \n                                   \", Available: \" + rs.getInt(\"available_quantity\"));\n            }\n        } catch (SQLException e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n<h3 id=\"%e5%89%b5%e5%bb%ba%e8%a8%82%e5%96%ae-auvzNqhXGx\">\u5275\u5efa\u8a02\u55ae<\/h3>\n<pre><code>\npublic class OrderService {\n    public void createOrder(int userId, int ticketId) {\n        String sql = \"INSERT INTO Orders (user_id, ticket_id, order_date) VALUES (?, ?, NOW())\";\n        try (Connection conn = DatabaseConnection.getConnection();\n             PreparedStatement pstmt = conn.prepareStatement(sql)) {\n             \n            pstmt.setInt(1, userId);\n            pstmt.setInt(2, ticketId);\n            pstmt.executeUpdate();\n            System.out.println(\"Order created successfully.\");\n        } catch (SQLException e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-auvzNqhXGx\">\u7e3d\u7d50<\/h2>\n<p>\u672c\u6587\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528Java\u5be6\u73fe\u4e00\u500b\u7c21\u55ae\u7684\u7db2\u7d61\u8cfc\u7968\u7cfb\u7d71\uff0c\u5305\u62ec\u6578\u64da\u5eab\u8a2d\u8a08\u548c\u57fa\u672c\u7684Java\u4ee3\u78bc\u793a\u4f8b\u3002\u9019\u4e9b\u57fa\u790e\u77e5\u8b58\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u69cb\u5efa\u66f4\u8907\u96dc\u7684\u7cfb\u7d71\uff0c\u4e26\u9032\u4e00\u6b65\u63a2\u7d22\u7db2\u7d61\u8cfc\u7968\u7684\u5404\u7a2e\u529f\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u4f86\u90e8\u7f72\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u9805\u76ee\u9084\u662f\u5927\u578b\u4f01\u696d\u61c9\u7528\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Java\u5be6\u73fe\u7684\u7db2\u7d61\u8cfc\u7968\u7cfb\u7d71\u6578\u64da\u5eab\u4ee3\u78bc\uff0c\u63d0\u4f9b\u9ad8\u6548\u7684\u7968\u52d9\u7ba1\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u7c21\u5316\u8cfc\u7968\u6d41\u7a0b\uff0c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\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-61847","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61847","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=61847"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61847\/revisions"}],"predecessor-version":[{"id":61848,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61847\/revisions\/61848"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}