DAO---1具体编码工作

1. 建立DAO接口：

 

package com.pro.db;

import java.util.List;

import com.pro.bean.Users;

public interface DAOInter {

 public void insert(Users user) throws Exception;

 public void update(Users user) throws Exception;

 public void delete(int userid) throws Exception;

 public Users queryById(int userid) throws Exception;

 public List queryAll() throws Exception;

}

2.接口实现类：

 

…………

 

3.servlet等

以后更新