第一步

package com.sxt.service;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sxt.domain.User;
import com.sxt.mapper.UserMapper;
import org.springframework.stereotype.Service;

@Service
public class UserService extends ServiceImpl<UserMapper, User> {
}

第二部

  @Autowired
      
 
private UserService userService;
         @Test
        public void  bach(){
              List<User> listuser=    new ArrayList<User>();
              for(int i=0;i<100;i++){
                 User user=    new User();
               user.setId(i);
               user.setName(i+"康康");
               user.setAddress(i
 
+"合浦");
               listuser.add(user);
               if(i==20){//驗證出錯時，有沒有新增進去
               int a=i/0;
               }
           }
            userService.saveBatch(listuser);//批量匯入
            System.out.println("成功");
 }

參考https://blog.csdn.net/yhj_911/article/details/105544642