@RunWith(SpringRunner.class)
@SpringBootTest
public class OpsApplicationTests {

   @Autowired
   private WebApplicationContext wac;

    private MockMvc mockMvc;

   @Before
    public void setup(){
       mockMvc = MockMvcBuilders.webAppContextSetup(wac).build();
    }

   @Test
    public void whenQuerySuccess() throws Exception {
        mockMvc.perform(MockMvcRequestBuilders.get("/user")
        .contentType(MediaType.APPLICATION_JSON_UTF8))
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andExpect(MockMvcResultMatchers.jsonPath("$.length()").value(3));
    }
}

运行完后报错了：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1704) ~[spring-beans-5.0.0.RELEASE.jar:5.0.0.RELEASE]

不知道是不是和老师写的哪里不对~