mybatis---CURD

查询记录

<select id="getUserList" resultType="org.example.pojo.User">
        select * from user.use1
    </select>

    <select id="getUserByid" resultType="org.example.pojo.User" parameterType="int">
        select * from user.use1 where id = #{id};
    </select>

增加

    //插入
    int AddUser(User user);

<!--    对象中的属性，可以直接取出来-->
<insert id="AddUser" parameterType="org.example.pojo.User">
        insert into user.use1(id,name,pwd) values (#{id},#{name},#{pwd});
</insert>

修改

//    修改
    int UpdateUser(User user);

<update id="UpdateUser" parameterType="org.example.pojo.User">
        update User.use1 set name=#{name},pwd=#{pwd} where id=#{id};
</update>

删除

//    删除
    int DeleteUser(User user);

<delete id="DeleteUser" parameterType="org.example.pojo.User">
        delete from User.use1 where id=#{id};
</delete>

测试类

package org.example.dao;

import org.apache.ibatis.session.SqlSession;
import org.example.Mapper.UserDao;
import org.example.pojo.User;
import org.example.util.MybatisUtil;
import org.junit.Test;

import java.util.List;

public class UserDaoTest {
    @Test
    public void test(){
        //获得SqlSession对象
        SqlSession sqlSession = MybatisUtil.getSqlSession();
        //执行sql
        UserDao mapper = sqlSession.getMapper(UserDao.class);

        List<User> userList = mapper.getUserList();

        for (User user : userList) {
            System.out.println(user);
        }
        sqlSession.close();
    }
    @Test
    public void getUserByid(){
        SqlSession sqlSession = MybatisUtil.getSqlSession();
        UserDao mapper = sqlSession.getMapper(UserDao.class);
        User user = mapper.getUserByid(1);
        System.out.println(user);

        sqlSession.close();

    }
    //增删改需要提交事务
    @Test
    public void AddUser(){
        SqlSession sqlSession = MybatisUtil.getSqlSession();
        UserDao mapper = sqlSession.getMapper(UserDao.class);
        int popo = mapper.AddUser(new User(5, "opo", "232"));
        if(popo>=1){
            System.out.println("增加成功");
        }
//        提交事务
        sqlSession.commit();
        sqlSession.close();
    }
    @Test
    public void UpdateUser(){
        SqlSession sqlSession = MybatisUtil.getSqlSession();
        UserDao mapper = sqlSession.getMapper(UserDao.class);
        int popo = mapper.UpdateUser(new User(5, "opo", "232111"));
        if(popo>=1){
            System.out.println("修改成功");
        }
//        提交事务
        sqlSession.commit();
        sqlSession.close();
    }
    @Test
    public void DeleteUser(){
        SqlSession sqlSession = MybatisUtil.getSqlSession();
        UserDao mapper = sqlSession.getMapper(UserDao.class);
        int popo = mapper.DeleteUser(new User(5, "opo", "232111"));
        if(popo>=1){
            System.out.println("删除成功");
        }
//        提交事务
        sqlSession.commit();
        sqlSession.close();
    }
}