JDBC链接的四个步骤

1.加载驱动程序 Class.forName("oracle.jdbc.driver.OracleDriver"); 2. 创建链接 Connection conn = DriverMananger.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:xe","用户名","密码"); 3. 执行查询 4. 关闭数据库链接 ==============实际

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