@RunWith(SpringJUnit4ClassRunner.class)@SpringBootTestpublicclassSpringBoot09JpaApplicationTests{@Autowiredprivate UserDao userDao;// 添加@TestpublicvoidaddUser(){
User user =newUser();
user.setName("李四");
user.setEmail("[email protected]");
user = userDao.save(user);//将带有主键的对象返回}//查询@Testpublicvoidfind_One(){
Optional<User> optional = userDao.findById(1);// 值不为空if(optional.isPresent()){
User user = optional.get();
System.out.println(user);}else{
System.out.println("没有该用户");}}}