mybatis的测试

package com.heima.test;

import com.heima.dao.UserDao;
import com.heima.pojo.QueryVo;
import com.heima.pojo.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

public class TestHeiMa {

    private InputStream in;
    private SqlSession sqlSession;
    private UserDao userDao;

    //初始化
    @Before
    public void init() throws Exception{
        //1、读取配置文件
        in = Resources.getResourceAsStream("mybatis-config.xml");
        //2、读取sqlsessionFactory
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        //3、读取session对象
        sqlSession = factory.openSession();
        //4、获取dao的代理对象
        userDao = sqlSession.getMapper(UserDao.class);
    }

    //释放资源和提交事务
    @After
    public void destroy() throws Exception{
        //6、释放资源
        sqlSession.commit();
        sqlSession.close();
        in.close();
    }

    //查询所有
    @Test
    public void test(){
        //5、执行查询所有方法
        List<User> list = userDao.findAll();
        for(User user : list){
            System.out.println(user);
        }
    }

    //添加
    @Test
    public void add(){
        User user = new User();
        user.setUsername("cccc");
        user.setPassword("1521");
        user.setRealName("阿德");
        user.setSex("男");
        user.setAge(12);
        System.out.println("保存前"+user);
        userDao.insert(user);
        System.out.println("保存后"+user);
    }

    //修改
    @Test
    public void update(){
        User user = new User();
        user.setUserId(6);
        user.setUsername("myadd");
        user.setPassword("1521");
        user.setRealName("阿德");
        user.setSex("女");
        user.setAge(19);
        userDao.update(user);
    }

    //删除
    @Test
    public void delete(){
      userDao.delete(6);
    }

    //查询一个
    @Test
    public void findOne(){
        User user = userDao.findOne(1);
        System.out.println(user);
    }

    //模糊查询
    @Test
    public void findByName(){
        List<User> users = userDao.findByName("%s%");
        for(User user : users){
            System.out.println(user);
        }
    }

    //查询记录条数
    @Test
    public void findTotal(){
        Integer total = userDao.findTotal();
        System.out.println(total);
    }

    //使用实体类包装对象作为查询条件
    @Test
    public void queryVo(){
        QueryVo vo=new QueryVo();
        User user=new User();
        user.setUsername("%w%");
        vo.setUser(user);
        List<User> users = userDao.queryVo(vo);
        for(User u : users){
            System.out.println(u);
        }
    }

    //条件查询
    @Test
    public void findUserByCondition(){
        User user=new User();
        user.setUsername("wangwu");
        user.setSex("女");
        List<User> userByCondition = userDao.findUserByCondition(user);
        for (User user1 : userByCondition) {
            System.out.println(user1);
        }
    }


    /***
     * 使用foreach标签查询多个id的信息
     */
    @Test
    public void findUserIds(){
        QueryVo queryVo = new QueryVo();
        ArrayList<Integer> list = new ArrayList<>();
        list.add(1);
        list.add(3);
        list.add(2);
        queryVo.setIds(list);

        List<User> userIds = userDao.findUserIds(queryVo);
        for (User userId : userIds) {
            System.out.println(userId);
        }
    }

}

在bilibili看了老师的视频，讲解十分到位，自己的测试，若有错误，欢迎指正