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  • foreach 查出BIGTYPE,SMALLTYPE

    package com.qfedu.springboot.ssm.mapper;
    
    import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
    import com.qfedu.springboot.ssm.entity.Cate;
    import com.qfedu.springboot.ssm.entity.User;
    import org.junit.jupiter.api.Test;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.test.context.SpringBootTest;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    
    import static org.junit.jupiter.api.Assertions.*;
    
    @SpringBootTest
    class UserMapperTest {
        @Autowired
        private UserMapper userMapper;
    
        @Autowired
        private CateMapper cateMapper;
    
        @Test
        void test1(){
            User user = new User();
    //        user.setId(111L);
    //        user.setAge(11);
    //
    //        user.setEmail("qq@qq.com");
    //        user.setName("csj");
    //        userMapper.insert(user);
    
            List<User> users = userMapper.selectList(null);
    //        List<User> focList = new ArrayList<>();
            ArrayList<String> list=new ArrayList();
            for (User user1 : users) {
    //            user1.setBigType(user1.getAge()+1000);
    //            String id = "1";
    //            String id = user1.getBigType();
    //            String id2 = user1.getSmallType();
    //            System.out.println(id);
    //            System.out.println("================================");
    //            System.out.println(user1.getBigType());
    //            System.out.println("~~~~~~~~~~~~~~~~~~~~");
    //            Cate cate = cateMapper.selectById(user1.getBigType());
    //            System.out.println(cate);
    //            Cate cate2 = cateMapper.selectById(user1.getSmallType());
    //            System.out.println(cate.getName());
                user1.setBigType(cateMapper.selectById(user1.getBigType()).getName());
                user1.setSmallType(cateMapper.selectById(user1.getSmallType()).getName());
    
            }
            for (User user1 : users) {
                System.out.println(user1);
            }
        }
        @Test
        void test2(){
    
            QueryWrapper<User> wrapper = new QueryWrapper<>();
            wrapper.eq("name", "csj");
            List<User> users = userMapper.selectList(wrapper);
            System.out.println(users);
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/csjoz/p/15422943.html
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