{"id":67070,"date":"2025-05-03T17:27:49","date_gmt":"2025-05-03T09:27:49","guid":{"rendered":"https:\/\/fwq.ai\/blog\/67070\/"},"modified":"2025-05-03T17:27:49","modified_gmt":"2025-05-03T09:27:49","slug":"java-%e4%b8%ad%e7%9a%84-jdbc-%e7%bb%bc%e5%90%88%e6%8c%87%e5%8d%97%ef%bc%9a%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86%e5%92%8c%e6%9c%80%e4%bd%b3%e5%ae%9e%e8%b7%b5-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/67070\/","title":{"rendered":"Java \u4e2d\u7684 JDBC \u7efc\u5408\u6307\u5357\uff1a\u5de5\u4f5c\u539f\u7406\u548c\u6700\u4f73\u5b9e\u8df5"},"content":{"rendered":"

\"Java<\/p>\n

java \u6570\u636e\u5e93\u8fde\u63a5 (jdbc) \u662f java \u751f\u6001\u7cfb\u7edf\u7684\u6838\u5fc3\u90e8\u5206\uff0c\u5b83\u5141\u8bb8 java \u5e94\u7528\u7a0b\u5e8f\u4e0e \u3001postgresql\u3001 db \u7b49\u5173\u7cfb\u6570\u636e\u5e93\u8fdb\u884c\u4ea4\u4e92\u3002\u5b83\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u6807\u51c6\u7684api\u6765\u6267\u884c\u67e5\u8be2\u3001\u66f4\u65b0\u548c\u7ba1\u7406\u6570\u636e\u7b49\u6570\u636e\u5e93\u64cd\u4f5c\u3002<\/p>\n

\u672c\u6307\u5357\u6df1\u5165\u63a2\u8ba8 jdbc\uff0c\u89e3\u91ca\u5b83\u7684\u7ec4\u4ef6\u3001\u5b83\u5728\u5e55\u540e\u5982\u4f55\u5de5\u4f5c\u4ee5\u53ca\u8981\u8fd9\u6837\u8bbe\u8ba1\u3002\u6211\u4eec\u8fd8\u5c06\u5305\u542b java \u4ee3\u7801\u7247\u6bb5\u6765\u6f14\u793a\u73b0\u5b9e\u4e16\u754c\u7684\u7528\u4f8b\u3002<\/p>\n

\u4ec0\u4e48\u662f jdbc\uff1f <\/h2>\n

jdbc \u662f java \u4e2d\u7684\u4e00\u4e2a api\uff0c\u7528\u4e8e\u62bd\u8c61\u6570\u636e\u5e93\u901a\u4fe1\u3002\u5b83\u63d0\u4f9b\uff1a
\u2022 \u4e0e\u4e0d\u540c\u6570\u636e\u5e93\u7cfb\u7edf\u4ea4\u4e92\u7684\u7edf\u4e00\u754c\u9762\u3002
\u2022 \u8fde\u63a5\u3001\u6267\u884c sql \u67e5\u8be2\u3001\u68c0\u7d22\u7ed3\u679c\u548c\u5904\u7406\u4e8b\u52a1\u7684\u65b9\u6cd5\u3002<\/p>\n

jdbc \u4f7f\u7528\u9a71\u52a8\u7a0b\u5e8f\uff08\u7279\u5b9a\u4e8e\u4f9b\u5e94\u5546\u7684\u5b9e\u73b0\uff09\u4e0e\u6570\u636e\u5e93\u901a\u4fe1\uff0c\u4ece\u800c\u5b9e\u73b0 java \u5e94\u7528\u7a0b\u5e8f\u7684\u6570\u636e\u5e93\u72ec\u7acb\u6027\u3002<\/p>\n

jdbc \u7684\u5e95\u5c42\u5de5\u4f5c\u539f\u7406 <\/h2>\n
    \n
  1. \u9a71\u52a8\u7a0b\u5e8f\u7ba1\u7406\u5668\uff1a\u7ba1\u7406\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u5217\u8868\u5e76\u5efa\u7acb\u4e0e\u6570\u636e\u5e93\u7684\u8fde\u63a5\u3002<\/li>\n
  2. jdbc \u9a71\u52a8\u7a0b\u5e8f\uff1a\u7279\u5b9a\u4e8e\u4f9b\u5e94\u5546\u7684\u5b9e\u73b0\uff0c\u5c06 java jdbc \u8c03\u7528\u8f6c\u6362\u4e3a\u672c\u673a\u6570\u636e\u5e93\u8c03\u7528\u3002<\/li>\n
  3. \u8fde\u63a5\uff1a\u8868\u793a\u4e0e\u6570\u636e\u5e93\u7684\u6253\u5f00\u8fde\u63a5\u3002<\/li>\n
  4. \u8bed\u53e5\uff1a\u4ee3\u8868 sql \u67e5\u8be2\u6216\u66f4\u65b0\u64cd\u4f5c\u3002<\/li>\n
  5. resultset\uff1a\u4fdd\u5b58\u67e5\u8be2\u64cd\u4f5c\u7684\u7ed3\u679c\u3002<\/li>\n<\/ol>\n

    jdbc\u7684\u6838\u5fc3\u7ec4\u4ef6 <\/h2>\n
      \n
    1. jdbc \u9a71\u52a8\u7a0b\u5e8f<\/li>\n<\/ol>\n

      jdbc \u9a71\u52a8\u7a0b\u5e8f\u5f25\u5408\u4e86 java \u5e94\u7528\u7a0b\u5e8f\u548c\u6570\u636e\u5e93\u7279\u5b9a\u534f\u8bae\u4e4b\u95f4\u7684\u5dee\u8ddd\u3002<\/p>\n

      \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

      \u6709\u56db\u79cd\u7c7b\u578b\u7684 jdbc \u9a71\u52a8\u7a0b\u5e8f\uff1a
      \u2022 \u7c7b\u578b 1\uff1ajdbc-odbc \u6865\uff08\u5df2\u5f03\u7528\uff09
      \u2022 \u7c7b\u578b 2\uff1a\u672c\u673a api \u9a71\u52a8\u7a0b\u5e8f
      \u2022 \u7c7b\u578b 3\uff1a\u7f51\u7edc\u534f\u8bae\u9a71\u52a8\u7a0b\u5e8f
      \u2022 \u7c7b\u578b 4\uff1a\u7626\u9a71\u52a8\u7a0b\u5e8f\uff08\u7eaf java\uff09<\/p>\n

      \u73b0\u4ee3\u5e94\u7528\u7a0b\u5e8f\u4e3b\u8981\u4f7f\u7528 type 4 \u9a71\u52a8\u7a0b\u5e8f\uff0c\u56e0\u4e3a\u5b83\u4eec\u72ec\u7acb\u4e8e\u5e73\u53f0\u5e76\u4e14\u4e0d\u9700\u8981\u672c\u673a\u5e93\u3002<\/p>\n

      \u53ef\u4ee5\u4f7f\u7528 singleton \u548c try-with-resources \u6765\u6539\u8fdb\u8fde\u63a5\u7ba1\u7406\u3002\u539f\u56e0\u5982\u4e0b\uff1a<\/p>\n

      \u4e3a\u4ec0\u4e48\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f\u8fdb\u884c\u8fde\u63a5\uff1f <\/h3>\n

      \u6709\u6548\u7ba1\u7406\u6570\u636e\u5e93\u8fde\u63a5\u5bf9\u4e8e\u6027\u80fd\u548c\u81f3\u5173\u91cd\u8981\u3002\u5982\u679c\u5e94\u7528\u7a0b\u5e8f\u7684\u6bcf\u4e2a\u90e8\u5206\u90fd\u521b\u5efa\u81ea\u5df1\u7684\u8fde\u63a5\uff0c\u5b83\u53ef\u4ee5\uff1a
      \u2022 \u589e\u52a0\u5f00\u9500\u3002
      \u2022 \u7531\u4e8e\u591a\u4e2a\u6253\u5f00\u7684\u8fde\u63a5\u5bfc\u81f4\u8d44\u6e90\u8017\u5c3d\u3002<\/p>\n

      \u901a\u8fc7\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f\uff0c\u60a8\u53ef\u4ee5\u786e\u4fdd\u4ec5\u5b58\u5728\u4e00\u4e2a\u8fde\u63a5\u7ba1\u7406\u5668\u5b9e\u4f8b\uff0c\u4ece\u800c\u63d0\u4f9b\u4e00\u79cd\u7ba1\u7406\u6570\u636e\u5e93\u8fde\u63a5\u7684\u96c6\u4e2d\u65b9\u5f0f\u3002<\/p>\n

      \u6570\u636e\u5e93\u8fde\u63a5\u7684\u5355\u4f8b\u5b9e\u73b0 <\/h3>\n

      \u4ee5\u4e0b\u662f\u5982\u4f55\u5728 jdbc \u4e2d\u5b9e\u73b0\u6570\u636e\u5e93\u8fde\u63a5\u7684\u5355\u4f8b\uff1a<\/p>\n

      import java.sql.connection;\nimport java.sql.drivermanager;\nimport java.sql.sqlexception;\n\npublic class databaseconnection {\n    private static databaseconnection instance;\n    private connection connection;\n    private final string url = \"jdbc:mysql:\/\/localhost:3306\/mydatabase\";\n    private final string user = \"root\";\n    private final string password = \"password\";\n\n    private databaseconnection() throws sqlexception {\n        try {\n            this.connection = drivermanager.getconnection(url, user, password);\n        } catch (sqlexception e) {\n            throw new runtimeexception(\"error connecting to the database\", e);\n        }\n    }\n\n    public static databaseconnection getinstance() throws sqlexception {\n        if (instance == null) {\n            instance = new databaseconnection();\n        }\n        return instance;\n    }\n\n    public connection getconnection() {\n        return connection;\n    }\n}\n<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4f7f\u7528\u5355\u4f8b\u8fdb\u884c\u8fde\u63a5\uff1a<\/p>\n
      import java.sql.connection;\nimport java.sql.resultset;\nimport java.sql.statement;\n\npublic class singletonexample {\n    public static void main(string[] args) {\n        try {\n            \/\/ get the singleton instance of the database connection\n            connection connection = databaseconnection.getinstance().getconnection();\n\n            \/\/ execute a query\n            try (statement statement = connection.createstatement();\n                 resultset resultset = statement.executequery(\"select * from employees\")) {\n                while (resultset.next()) {\n                    system.out.println(\"id: \" + resultset.getint(\"id\"));\n                    system.out.println(\"name: \" + resultset.getstring(\"name\"));\n                }\n            }\n        } catch (exception e) {\n            e.printstacktrace();\n        }\n    }\n}\n<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
       \u81ea\u52a8\u8d44\u6e90\u7ba1\u7406\u7684\u8d44\u6e90\u5c1d\u8bd5 <\/h3>\n
      \u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528 try-with-resources\uff1f
       \u2022 \u6d88\u9664\u5fd8\u8bb0\u5173\u95ed\u8fde\u63a5\u3001\u8bed\u53e5\u6216\u7ed3\u679c\u96c6\u7b49\u8d44\u6e90\u7684\u98ce\u9669\u3002
       \u2022 \u5728 try \u5757\u672b\u5c3e\u81ea\u52a8\u8c03\u7528\u8d44\u6e90\u7684 close() \u65b9\u6cd5\u3002
       \u2022 \u63d0\u9ad8\u548c\u7a33\u5065\u6027\u3002<\/p>\n
      \u8ba9\u6211\u4eec\u770b\u770b try-with-resources \u5982\u4f55\u7b80\u5316 jdbc \u4ee3\u7801\uff1a<\/p>\n
      \u793a\u4f8b\uff1a\u4f7f\u7528 try-with-resources<\/p>\n
      import java.sql.Connection;\nimport java.sql.PreparedStatement;\nimport java.sql.ResultSet;\n\npublic class TryWithResourcesExample {\n    public static void main(String[] args) {\n        String query = \"SELECT * FROM employees WHERE id = ?\";\n\n        try (Connection connection = DatabaseConnection.getInstance().getConnection();\n             PreparedStatement preparedStatement = connection.prepareStatement(query)) {\n\n            preparedStatement.setInt(1, 101);\n\n            try (ResultSet resultSet = preparedStatement.executeQuery()) {\n                while (resultSet.next()) {\n                    System.out.println(\"ID: \" + resultSet.getInt(\"id\"));\n                    System.out.println(\"Name: \" + resultSet.getString(\"name\"));\n                }\n            }\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
       jdbc \u6700\u4f73\u5b9e\u8df5 <\/h2>\n
      \u8ba9\u6211\u4eec\u56de\u987e\u4e00\u4e0b\u6700\u4f73\u5b9e\u8df5\uff1a<\/p>\n
        \n
      1.  \u4f7f\u7528 singleton \u8fdb\u884c\u8fde\u63a5\uff1a\u786e\u4fdd\u53ea\u6709\u4e00\u4e2a\u8fde\u63a5\u7ba1\u7406\u5668\u5b9e\u4f8b\u5b58\u5728\uff0c\u51cf\u5c11\u5f00\u9500\u5e76\u63d0\u9ad8\u6548\u7387\u3002<\/li>\n
      2.  \u5229\u7528 try-with-resources\uff1a\u4f7f\u7528 try-with-resources \u81ea\u52a8\u5173\u95ed\u8fde\u63a5\u3001\u8bed\u53e5\u548c\u7ed3\u679c\u96c6\u3002<\/li>\n
      3.  \u4f7f\u7528\u8fde\u63a5\u6c60\uff1a\u5bf9\u4e8e\u9ad8\u6027\u80fd\u5e94\u7528\u7a0b\u5e8f\uff0c\u4f7f\u7528 hikaricp \u6216  dbcp \u7b49\u5e93\u6765\u6709\u6548\u7ba1\u7406\u8fde\u63a5\u3002<\/li>\n
      4.  \u907f\u514d\u786c\u7f16\u7801\uff1a\u5c06\u6570\u636e\u5e93\u51ed\u636e\u548c\u914d\u7f6e\u5b58\u50a8\u5728\u73af\u5883\u53d8\u91cf\u6216\u914d\u7f6e\u6587\u4ef6\u4e2d\u3002<\/li>\n
      5.  \u4f18\u96c5\u5730\u5904\u7406\u5f02\u5e38\uff1a\u4f7f\u7528\u6b63\u786e\u7684\u9519\u8bef\u5904\u7406\u548c\u65e5\u5fd7\u8bb0\u5f55\u3002<\/li>\n
      6.  \u4f18\u5316\u67e5\u8be2\uff1a\u4f7f\u7528\u7d22\u5f15\u5e76\u4ec5\u83b7\u53d6\u5fc5\u8981\u7684\u6570\u636e\u3002<\/li>\n<\/ol>\n
         \u7ed3\u8bba <\/h2>\n
        jdbc \u662f java \u5f00\u53d1\u4eba\u5458\u4f7f\u7528\u5173\u7cfb\u6570\u636e\u5e93\u7684\u57fa\u7840\u6280\u672f\u3002\u901a\u8fc7\u7ed3\u5408 singleton \u7b49\u9ad8\u7ea7\u6a21\u5f0f\u8fdb\u884c\u8fde\u63a5\u7ba1\u7406\uff0c\u5e76\u5229\u7528 try-with-resources \u8fdb\u884c\u66f4\u6e05\u6d01\u7684\u8d44\u6e90\u5904\u7406\uff0c\u60a8\u53ef\u4ee5\u6784\u5efa\u5065\u58ee\u3001\u9ad8\u6548\u4e14\u53ef\u7ef4\u62a4\u7684\u6570\u636e\u5e93\u9a71\u52a8\u5e94\u7528\u7a0b\u5e8f\u3002\u65e0\u8bba\u60a8\u662f\u5f00\u53d1\u5c0f\u578b\u9879\u76ee\u8fd8\u662f\u5927\u578b\u4f01\u4e1a\u5e94\u7528\u7a0b\u5e8f\uff0c\u9075\u5faa\u8fd9\u4e9b\u6700\u4f73\u5b9e\u8df5\u90fd\u53ef\u4ee5\u786e\u4fdd\u60a8\u7684\u5e94\u7528\u7a0b\u5e8f\u9ad8\u6027\u80fd\u4e14\u53ef\u9760\u3002<\/p>\n
        \u4ee5\u4e0a\u5c31\u662fJava \u4e2d\u7684 JDBC \u7efc\u5408\u6307\u5357\uff1a\u5de5\u4f5c\u539f\u7406\u548c\u6700\u4f73\u5b9e\u8df5\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        java \u6570\u636e\u5e93\u8fde\u63a5 (jdbc) \u662f java \u751f\u6001\u7cfb\u7edf\u7684\u6838\u5fc3\u90e8\u5206\uff0c\u5b83\u5141\u8bb8 java \u5e94\u7528\u7a0b\u5e8f\u4e0e \u3001postgresql\u3001 db \u7b49\u5173\u7cfb\u6570\u636e\u5e93\u8fdb\u884c\u4ea4\u4e92\u3002\u5b83\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u6807\u51c6\u7684api\u6765\u6267\u884c\u67e5\u8be2\u3001\u66f4\u65b0\u548c\u7ba1\u7406\u6570\u636e\u7b49\u6570\u636e\u5e93\u64cd\u4f5c\u3002 \u672c\u6307\u5357\u6df1\u5165\u63a2\u8ba8 jdbc\uff0c\u89e3\u91ca\u5b83\u7684\u7ec4\u4ef6\u3001\u5b83\u5728\u5e55\u540e\u5982\u4f55\u5de5\u4f5c\u4ee5\u53ca\u8981\u8fd9\u6837\u8bbe\u8ba1\u3002\u6211\u4eec\u8fd8\u5c06\u5305\u542b java \u4ee3\u7801\u7247\u6bb5\u6765\u6f14\u793a\u73b0\u5b9e\u4e16\u754c\u7684\u7528\u4f8b\u3002 \u4ec0\u4e48\u662f jdbc\uff1f jdbc \u662f java \u4e2d\u7684\u4e00\u4e2a api\uff0c\u7528\u4e8e\u62bd\u8c61\u6570\u636e\u5e93\u901a\u4fe1\u3002\u5b83\u63d0\u4f9b\uff1a \u2022 \u4e0e\u4e0d\u540c\u6570\u636e\u5e93\u7cfb\u7edf\u4ea4\u4e92\u7684\u7edf\u4e00\u754c\u9762\u3002 \u2022 \u8fde\u63a5\u3001\u6267\u884c sql \u67e5\u8be2\u3001\u68c0\u7d22\u7ed3\u679c\u548c\u5904\u7406\u4e8b\u52a1\u7684\u65b9\u6cd5\u3002 jdbc \u4f7f\u7528\u9a71\u52a8\u7a0b\u5e8f\uff08\u7279\u5b9a\u4e8e\u4f9b\u5e94\u5546\u7684\u5b9e\u73b0\uff09\u4e0e\u6570\u636e\u5e93\u901a\u4fe1\uff0c\u4ece\u800c\u5b9e\u73b0 java \u5e94\u7528\u7a0b\u5e8f\u7684\u6570\u636e\u5e93\u72ec\u7acb\u6027\u3002 jdbc \u7684\u5e95\u5c42\u5de5\u4f5c\u539f\u7406 \u9a71\u52a8\u7a0b\u5e8f\u7ba1\u7406\u5668\uff1a\u7ba1\u7406\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u5217\u8868\u5e76\u5efa\u7acb\u4e0e\u6570\u636e\u5e93\u7684\u8fde\u63a5\u3002 jdbc \u9a71\u52a8\u7a0b\u5e8f\uff1a\u7279\u5b9a\u4e8e\u4f9b\u5e94\u5546\u7684\u5b9e\u73b0\uff0c\u5c06 java jdbc \u8c03\u7528\u8f6c\u6362\u4e3a\u672c\u673a\u6570\u636e\u5e93\u8c03\u7528\u3002 \u8fde\u63a5\uff1a\u8868\u793a\u4e0e\u6570\u636e\u5e93\u7684\u6253\u5f00\u8fde\u63a5\u3002 \u8bed\u53e5\uff1a\u4ee3\u8868 sql \u67e5\u8be2\u6216\u66f4\u65b0\u64cd\u4f5c\u3002 resultset\uff1a\u4fdd\u5b58\u67e5\u8be2\u64cd\u4f5c\u7684\u7ed3\u679c\u3002 jdbc\u7684\u6838\u5fc3\u7ec4\u4ef6 jdbc \u9a71\u52a8\u7a0b\u5e8f jdbc \u9a71\u52a8\u7a0b\u5e8f\u5f25\u5408\u4e86 java \u5e94\u7528\u7a0b\u5e8f\u548c\u6570\u636e\u5e93\u7279\u5b9a\u534f\u8bae\u4e4b\u95f4\u7684\u5dee\u8ddd\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u6709\u56db\u79cd\u7c7b\u578b\u7684 jdbc […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-67070","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/67070","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=67070"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/67070\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=67070"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=67070"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=67070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}