{"id":61919,"date":"2024-10-13T14:43:18","date_gmt":"2024-10-13T06:43:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61919\/"},"modified":"2024-10-13T14:43:18","modified_gmt":"2024-10-13T06:43:18","slug":"java%e6%8a%80%e5%b7%a7%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e5%9b%9e%e9%a1%af%e7%9a%84%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95-java%e9%80%9a%e9%81%8e%e6%95%b8%e6%93%9a%e5%ba%ab%e5%9b%9e%e9%a1%af","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61919\/","title":{"rendered":"Java\u6280\u5de7\uff1a\u6578\u64da\u5eab\u56de\u986f\u7684\u5be6\u73fe\u65b9\u6cd5 (java\u901a\u904e\u6578\u64da\u5eab\u56de\u986f)"},"content":{"rendered":"

Java\u6280\u5de7\uff1a\u6578\u64da\u5eab\u56de\u986f\u7684\u5be6\u73fe\u65b9\u6cd5<\/h1>\n

\u5728\u7576\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0cJava\u4f5c\u70ba\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u7d93\u5e38\u88ab\u7528\u65bc\u69cb\u5efa\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u3002\u6578\u64da\u5eab\u56de\u986f\uff08Database Echo\uff09\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u9700\u6c42\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u548c\u986f\u793a\u6578\u64da\u7684\u60c5\u6cc1\u4e0b\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Java\u5be6\u73fe\u6578\u64da\u5eab\u56de\u986f\u7684\u529f\u80fd\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u56de\u986f\uff1f<\/h2>\n

\u6578\u64da\u5eab\u56de\u986f\u662f\u6307\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u4e26\u5c07\u5176\u986f\u793a\u5728\u61c9\u7528\u7a0b\u5e8f\u754c\u9762\u4e0a\u7684\u904e\u7a0b\u3002\u9019\u4e00\u904e\u7a0b\u901a\u5e38\u6d89\u53ca\u5230\u6578\u64da\u5eab\u7684\u9023\u63a5\u3001\u67e5\u8a62\u57f7\u884c\u4ee5\u53ca\u7d50\u679c\u7684\u8655\u7406\u3002\u6578\u64da\u5eab\u56de\u986f\u7684\u5be6\u73fe\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5feb\u901f\u7372\u53d6\u548c\u5c55\u793a\u6578\u64da\uff0c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n

\u5be6\u73fe\u6578\u64da\u5eab\u56de\u986f\u7684\u6b65\u9a5f<\/h2>\n

1. \u8a2d\u7f6e\u6578\u64da\u5eab\u9023\u63a5<\/h3>\n

\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u8a2d\u7f6e\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u9019\u901a\u5e38\u901a\u904eJDBC\uff08Java Database Connectivity\uff09\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u9023\u63a5\u5230MySQL\u6578\u64da\u5eab\uff1a<\/p>\n

import java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.SQLException;\n\npublic class DatabaseConnection {\n    public static Connection connect() {\n        Connection connection = null;\n        try {\n            String url = \"jdbc:mysql:\/\/localhost:3306\/your_database\";\n            String user = \"your_username\";\n            String password = \"your_password\";\n            connection = DriverManager.getConnection(url, user, password);\n        } catch (SQLException e) {\n            e.printStackTrace();\n        }\n        return connection;\n    }\n}\n<\/code><\/pre>\n
2. \u57f7\u884c\u67e5\u8a62<\/h3>\n
\u4e00\u65e6\u5efa\u7acb\u4e86\u6578\u64da\u5eab\u9023\u63a5\uff0c\u6211\u5011\u53ef\u4ee5\u57f7\u884cSQL\u67e5\u8a62\u4f86\u6aa2\u7d22\u6578\u64da\u3002\u4ee5\u4e0b\u4ee3\u78bc\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u57f7\u884c\u67e5\u8a62\u4e26\u7372\u53d6\u7d50\u679c\uff1a<\/p>\n
import java.sql.Connection;\nimport java.sql.ResultSet;\nimport java.sql.Statement;\n\npublic class DatabaseQuery {\n    public static void fetchData() {\n        Connection connection = DatabaseConnection.connect();\n        String query = \"SELECT * FROM your_table\";\n        \n        try {\n            Statement statement = connection.createStatement();\n            ResultSet resultSet = statement.executeQuery(query);\n            \n            while (resultSet.next()) {\n                System.out.println(\"Column1: \" + resultSet.getString(\"column1\"));\n                System.out.println(\"Column2: \" + resultSet.getString(\"column2\"));\n            }\n        } catch (SQLException e) {\n            e.printStackTrace();\n        } finally {\n            try {\n                if (connection != null) {\n                    connection.close();\n                }\n            } catch (SQLException e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}\n<\/code><\/pre>\n
3. \u986f\u793a\u6578\u64da<\/h3>\n
\u5728\u7372\u53d6\u6578\u64da\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u5c07\u5176\u986f\u793a\u5728\u7528\u6236\u754c\u9762\u4e0a\u3002\u9019\u53ef\u4ee5\u901a\u904eJava Swing\u6216JavaFX\u7b49\u5716\u5f62\u7528\u6236\u754c\u9762\u6846\u67b6\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684Swing\u793a\u4f8b\uff1a<\/p>\n
import javax.swing.*;\nimport java.awt.*;\n\npublic class DataDisplay {\n    public static void main(String[] args) {\n        JFrame frame = new JFrame(\"\u6578\u64da\u5eab\u56de\u986f\");\n        JTextArea textArea = new JTextArea();\n        \n        \/\/ \u5047\u8a2dfetchData()\u8fd4\u56de\u4e00\u500b\u5b57\u7b26\u4e32\n        String data = \"\u5f9e\u6578\u64da\u5eab\u7372\u53d6\u7684\u6578\u64da\"; \/\/ \u9019\u88e1\u61c9\u8a72\u662f\u5be6\u969b\u7684\u6578\u64da\n        textArea.setText(data);\n        \n        frame.add(new JScrollPane(textArea), BorderLayout.CENTER);\n        frame.setSize(400, 300);\n        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);\n        frame.setVisible(true);\n    }\n}\n<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u901a\u904e\u4ee5\u4e0a\u6b65\u9a5f\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u4f7f\u7528Java\u5be6\u73fe\u6578\u64da\u5eab\u56de\u986f\u7684\u529f\u80fd\u3002\u9019\u4e0d\u50c5\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5feb\u901f\u7372\u53d6\u548c\u5c55\u793a\u6578\u64da\uff0c\u9084\u80fd\u63d0\u5347\u7528\u6236\u7684\u4e92\u52d5\u9ad4\u9a57\u3002\u7121\u8ad6\u662f\u4f7f\u7528JDBC\u9032\u884c\u6578\u64da\u5eab\u9023\u63a5\uff0c\u9084\u662f\u5229\u7528Swing\u6216JavaFX\u5c55\u793a\u6578\u64da\uff0c\u9019\u4e9b\u6280\u8853\u90fd\u70baJava\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684Java\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK\u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 \u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22Java\u6280\u5de7\uff0c\u4e86\u89e3\u5982\u4f55\u901a\u904e\u6578\u64da\u5eab\u5be6\u73fe\u6578\u64da\u56de\u986f\uff0c\u63d0\u5347\u61c9\u7528\u7a0b\u5e8f\u7684\u6578\u64da\u8655\u7406\u6548\u7387\u8207\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-61919","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61919","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=61919"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61919\/revisions"}],"predecessor-version":[{"id":61920,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61919\/revisions\/61920"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61919"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61919"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61919"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}