public class TestMysql { public static void main(String[] args) throws Exception{ //1、加载驱动程序 Class.forName("com.mysql.jdbc.Driver"); //连接MySql数据库,用户名和密码都是root /* oracle: Class.forName("oracle.jdbc.driver.OracleDriver"); String url =jdbc:oracle:thin:@127.0.0.1:1521:test */ String url = "jdbc:mysql://localhost:3306/test" ; String username = "root" ; String password = "root" ; //2、获取数据库连接 Connection conn =null; conn = DriverManager.getConnection(url, username, password); //3、创建一个Statement //Statement smt = conn.createStatement(); String sql ="select * from t_user"; PreparedStatement psmt = conn.prepareStatement(sql); //4、执行SQL ResultSet rs = psmt.executeQuery(); //5、处理结果 while(rs.next()){ System.out.println(rs.getInt(1)+"-"+rs.getString(2)+"-"+rs.getString(3)); } //6、关闭连接 if(rs!=null){ rs.close(); } } }
java jdbc实现
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