原始dao方法

1.新建conf文件

2.map映射文件

3.dao接口类

package dao;

import modole.User;

public interface Userdao {

public User GetUserByID(int id) throws Exception;

}

4.dao接口实现

package dao;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

import modole.User;

public class Userdaoimp implements Userdao{

private SqlSessionFactory sqlSessionFactory;

public Userdaoimp(SqlSessionFactory sqlSessionFactory){

this.sqlSessionFactory = sqlSessionFactory;

}

@Override

public User GetUserByID(int id) {

// TODO Auto-generated method stub

SqlSession session=sqlSessionFactory.openSession();

User user=session.selectOne("test.GetUserByID", id);

session.close();

return user;

}

}

4.测试

package test;

import java.io.InputStream;

import org.apache.ibatis.io.Resources;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import dao.Userdao;

import dao.Userdaoimp;

import modole.User;

public class selectid {

private static SqlSessionFactory sqlSessionFactory;

private static String path ="conf.xml";

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

InputStream is =Resources.getResourceAsStream(path);

sqlSessionFactory= new SqlSessionFactoryBuilder().build(is);

Userdao userdao = new Userdaoimp(sqlSessionFactory);

User user=userdao.GetUserByID(1);

System.out.println(user.getName());

}

}

5测试结果