eclipse中代码连接到mysql数据库

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class Test {

public static void main(String[] args) throws Exception{

new Test().add();

}

public static void add() throws Exception{

String url="jdbc:mysql://127.0.0.1:3306/demo";

String user="root";

String password="123";

//加载驱动类

Class.forName("com.mysql.jdbc.Driver");

//建立连接

Connection coon=DriverManager.getConnection(url, user, password);

System.out.println(coon);

//准备sql

//String sql="INSERT INTO STUDENT(SID,SNAME) VALUES (3,'5')";

//String sql2="UPDATE STUDENT SET SID=0 WHERE SID=2";

String sql3="delete from student where sid=0";

String sql4="select * from student";

//创建执行对象

Statement s=coon.createStatement();

//s.executeUpdate(sql);

//s.executeUpdate(sql2);

//执行语句

s.executeUpdate(sql3);//增删改

ResultSet rs=s.executeQuery(sql4);

rs.next();//指针控制判断是否有下一行记录,如果有两个next则是第二条记录，有几个就是第几条

System.out.println(rs.getInt(1));

System.out.println(rs.getString(2));//rs.getString(2)返回该行的第二个字录，该记录为string类型

coon.close();

}

}