package jdbcdemo; import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.Statement;public class jdbcdemo {private static final String url = "jdbc:mysql://127.0.0.1:3306/demo?useUnicode=true&characterEncoding=utf-8";private static final String user = "root";private static final String password = "doce";public static void main(String[] args) throws Exception {//1、加载mysql驱动Class.forName("com.mysql.jdbc.Driver");  //2、获得数据库连接Connection connection=DriverManager.getConnection(url ,user , password);//3、通过连接操作数据库,实现增删改查Statement statement=connection.createStatement();//4、执行sql语句ResultSet re = statement.executeQuery("select user_name,age from imooc_goddess;");while(re.next()){  System.out.println(re.getString("user_name")+","+re.getInt("age"));}}}