java连接mysql lookup_关于JDBC连接MySQL的问题，我一直解决不了（Myeclipse 环境下）...

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package org.mlj.jdbc;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.sql.Statement;

import java.net.UnknownHostException;

import java.net.InetAddress.*; public class DoInsert {

private Connection conn = null;

private Statement stmt = null;

private String driver = "com.mysql.jdbc.Driver";

private String username = "root";

private String password = "root";

private String sql = "INSERT INTO student(name,myclass,score)VALUES('莫丽娟','0801',801)";

public boolean addStudent(){

boolean flag = false;

try{

//step1:加载数据库厂商提供的驱动程序;

Class.forName(driver);

}catch(ClassNotFoundException e){

e.printStackTrace();

}

//Step2:提供数据库连接的URL

String url="jdbc:mysql://localhost：3306/test1";

try {

//step3：通过DriverManager获得数据库的一个连接对象

conn = DriverManager.getConnection(url,username,password);

}catch(SQLException e){

e.printStackTrace();

}

try{

//step4：创建Statement(SQL的执行环境)

stmt = conn.createStatement();

//step5:执行SQL语句

int row = stmt.executeUpdate(sql);

//step6:处理结果

if(row==1){

flag=true;

}

}catch(SQLException e){

e.printStackTrace();

}finally{

//step7:关闭JDBC的资源

if(null !=stmt){

try{stmt.close();}

catch(SQLException e){

e.printStackTrace();

}

}

}

return flag;

}

public static void main(String[] args) {

DoInsert doinsert = new DoInsert();

boolean flag = doinsert.addStudent();

if(flag){

System.out.println("添加信息成功！");

}else{

System.out.println("添加信息失败！");

} } }