增加和更新以save为前缀
UserService接口:
public interface UserService extends IService<User> { }
UserServiceImpl:
@Service public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService { }
其中User为实体类
package com.zhy.mybatisplus_project; import com.zhy.service.UserService; import com.zhy.mapper.UserMapper; import com.zhy.pojo.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 java.util.Map; @SpringBootTest public class MyBatisPlusServiceTest { @Autowired UserService userService; //批量添加 @Test public void test1(){ List<User> list = new ArrayList<>(); for(int i=0;i<10;i++){ User user = new User(); user.setAge(20+i); user.setName("z"+i); list.add(user); } boolean b = userService.saveBatch(list); System.out.println(b); } //查询总记录数 @Test public void test2(){ long count = userService.count(); System.out.println("总记录数:"+count); } }