通用service
文章目录
- 1. 接口类继承 `IService`
- 2. 接口实现类中继承`ServiceImpl
1. 接口类继承 IService<T>
public interface UserService extends IService<User> {
}
2. 接口实现类中继承ServiceImpl<M,T>
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
}
3. 测试
@Component
public class UserServiceTest extends MybatisPlusSamplesChapter1ApplicationTests {@Resourceprivate UserService userService;@Testpublic void getOne(){User one = userService.getOne(Wrappers.<User>lambdaQuery().gt(User::getAge, 25),false);System.out.println(one);}/*** 当调用saveBatch方法会执行插入操作* 当调用saveOrUpdateBatch方法会不存在执行插入存在执行更新操作*/@Testpublic void bath(){User user1 = new User();user1.setName("yuxin");user1.setAge(2);User user2 = new User();user2.setId(11L);user2.setName("ly");user2.setAge(25);List<User> userList = Arrays.asList(user1, user2);
// boolean saveBatch = userService.saveBatch(userList);boolean saveBatch = userService.saveOrUpdateBatch(userList);System.out.println(saveBatch);}@Testpublic void chain(){List<User> userList = userService.lambdaQuery().gt(User::getAge, 25).like(User::getName, "雨").list();userList.forEach(System.out::println);}@Testpublic void chain2(){boolean update = userService.lambdaUpdate().eq(User::getAge, 25).set(User::getAge, 30).update();System.out.println(update);}@Testpublic void chain3(){boolean remove = userService.lambdaUpdate().eq(User::getAge, 25).remove();System.out.println(remove);}
}
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