{"id":62031,"date":"2024-10-13T15:37:42","date_gmt":"2024-10-13T07:37:42","guid":{"rendered":"https:\/\/server.hk\/cnblog\/62031\/"},"modified":"2024-10-13T15:37:42","modified_gmt":"2024-10-13T07:37:42","slug":"java%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e8%ae%80%e5%8f%96%e5%92%8c%e8%bc%b8%e5%87%ba%e5%8a%9f%e8%83%bd%e8%a9%b3%e8%a7%a3-java%e5%be%9e%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e8%ae%80%e5%8f%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/62031\/","title":{"rendered":"Java\u5be6\u73fe\u6578\u64da\u5eab\u8b80\u53d6\u548c\u8f38\u51fa\u529f\u80fd\u8a73\u89e3 (java\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u4e26\u8f38\u51fa)"},"content":{"rendered":"<h1 id=\"java%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e8%ae%80%e5%8f%96%e5%92%8c%e8%bc%b8%e5%87%ba%e5%8a%9f%e8%83%bd%e8%a9%b3%e8%a7%a3-mkCzhWEMEe\">Java\u5be6\u73fe\u6578\u64da\u5eab\u8b80\u53d6\u548c\u8f38\u51fa\u529f\u80fd\u8a73\u89e3<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u64cd\u4f5c\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002Java\u4f5c\u70ba\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u5f0f\u4f86\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Java\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u6578\u64da\u4e26\u5c07\u5176\u8f38\u51fa\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"1-%e7%92%b0%e5%a2%83%e6%ba%96%e5%82%99-mkCzhWEMEe\">1. \u74b0\u5883\u6e96\u5099<\/h2>\n<p>\u5728\u958b\u59cb\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u78ba\u4fdd\u5df2\u7d93\u5b89\u88dd\u4e86\u4ee5\u4e0b\u74b0\u5883\uff1a<\/p>\n<ul>\n<li>Java Development Kit (JDK)<\/li>\n<li>\u4e00\u500b\u652f\u6301\u7684\u6578\u64da\u5eab\uff08\u5982MySQL\u3001PostgreSQL\u7b49\uff09<\/li>\n<li>\u76f8\u61c9\u7684JDBC\u9a45\u52d5\u7a0b\u5e8f<\/li>\n<\/ul>\n<h2 id=\"2-%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab-mkCzhWEMEe\">2. \u9023\u63a5\u6578\u64da\u5eab<\/h2>\n<p>\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528JDBC\u9023\u63a5MySQL\u6578\u64da\u5eab\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<pre><code>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            \/\/ \u52a0\u8f09JDBC\u9a45\u52d5\n            Class.forName(\"com.mysql.cj.jdbc.Driver\");\n            \/\/ \u5efa\u7acb\u9023\u63a5\n            connection = DriverManager.getConnection(\"jdbc:mysql:\/\/localhost:3306\/your_database\", \"username\", \"password\");\n        } catch (ClassNotFoundException | SQLException e) {\n            e.printStackTrace();\n        }\n        return connection;\n    }\n}\n<\/code><\/pre>\n<h2 id=\"3-%e5%be%9e%e6%95%b8%e6%93%9a%e5%ba%ab%e8%ae%80%e5%8f%96%e6%95%b8%e6%93%9a-mkCzhWEMEe\">3. \u5f9e\u6578\u64da\u5eab\u8b80\u53d6\u6578\u64da<\/h2>\n<p>\u4e00\u65e6\u5efa\u7acb\u4e86\u9023\u63a5\uff0c\u6211\u5011\u5c31\u53ef\u4ee5\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u67e5\u8a62\u6578\u64da\u4e26\u5c07\u5176\u8f38\u51fa\uff1a<\/p>\n<pre><code>import java.sql.Connection;\nimport java.sql.ResultSet;\nimport java.sql.SQLException;\nimport java.sql.Statement;\n\npublic class ReadData {\n    public static void main(String[] args) {\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                \/\/ \u5047\u8a2d\u6709\u4e00\u500b\u540d\u70ba'name'\u7684\u5217\n                String name = resultSet.getString(\"name\");\n                System.out.println(\"Name: \" + name);\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<h2 id=\"4-%e6%95%b8%e6%93%9a%e8%bc%b8%e5%87%ba-mkCzhWEMEe\">4. \u6578\u64da\u8f38\u51fa<\/h2>\n<p>\u5728\u4e0a\u8ff0\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u5df2\u7d93\u5c07\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u7684\u6578\u64da\u8f38\u51fa\u5230\u63a7\u5236\u53f0\u3002\u6839\u64da\u9700\u6c42\uff0c\u60a8\u4e5f\u53ef\u4ee5\u5c07\u6578\u64da\u8f38\u51fa\u5230\u6587\u4ef6\u6216\u5176\u4ed6\u5a92\u4ecb\u3002\u4ee5\u4e0b\u662f\u5c07\u6578\u64da\u5beb\u5165\u6587\u672c\u6587\u4ef6\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>import java.io.BufferedWriter;\nimport java.io.FileWriter;\nimport java.io.IOException;\n\npublic class WriteDataToFile {\n    public static void main(String[] args) {\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            BufferedWriter writer = new BufferedWriter(new FileWriter(\"output.txt\"));\n\n            while (resultSet.next()) {\n                String name = resultSet.getString(\"name\");\n                writer.write(\"Name: \" + name);\n                writer.newLine();\n            }\n            writer.close();\n        } catch (SQLException | IOException 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<h2 id=\"5-%e7%b8%bd%e7%b5%90-mkCzhWEMEe\">5. \u7e3d\u7d50<\/h2>\n<p>\u672c\u6587\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528Java\u5f9e\u6578\u64da\u5eab\u4e2d\u8b80\u53d6\u6578\u64da\u4e26\u5c07\u5176\u8f38\u51fa\u3002\u901a\u904e\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5\u3001\u57f7\u884c\u67e5\u8a62\u4ee5\u53ca\u5c07\u7d50\u679c\u8f38\u51fa\u5230\u63a7\u5236\u53f0\u6216\u6587\u4ef6\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u662f\u958b\u767c\u6578\u64da\u9a45\u52d5\u61c9\u7528\u7a0b\u5e8f\u7684\u57fa\u790e\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684Java\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0eJava\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab\u7684\u8b80\u53d6\u8207\u8f38\u51fa\u529f\u80fd\uff0c\u63d0\u4f9b\u8a73\u7d30\u6b65\u9a5f\u8207\u7bc4\u4f8b\uff0c\u52a9\u4f60\u8f15\u9b06\u638c\u63e1\u6578\u64da\u8655\u7406\u6280\u5de7\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-62031","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62031","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=62031"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62031\/revisions"}],"predecessor-version":[{"id":62032,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62031\/revisions\/62032"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=62031"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=62031"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=62031"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}