Spring boot 报错：Circular view path [...]: would dispatch back to the current handler

梦里梦外; 2021-09-26 05:10 424阅读 0赞

### Spring boot 报错：Circular view path \[…\]: would dispatch back to the current handler ###

参考自 [http://blog.csdn.net/wthfeng/article/details/52742830][http_blog.csdn.net_wthfeng_article_details_52742830]

在对mvc进行测试时，即便指定了配置文件中的视图解析依然没有作用，测试时会报异常：

javax.servlet.ServletException: Circular view path \[list\]: would dispatch back to the current handler URL \[/list\] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)

### 网上提到此问题的有： ###

[http://stackoverflow.com/questions/18813615/how-to-avoid-the-circular-view-path-exception-with-spring-mvc-test][http_stackoverflow.com_questions_18813615_how-to-avoid-the-circular-view-path-exception-with-spring-mvc-test]  
以及  
[https://myshittycode.com/2014/01/17/mockmvc-circular-view-path-view-would-dispatch-back-to-the-current-handler-url-view-again/][https_myshittycode.com_2014_01_17_mockmvc-circular-view-path-view-would-dispatch-back-to-the-current-handler-url-view-again]

### 摘录文章中的话 ###

**When you don’t declare a ViewResolver, spring registers a default InternalResourceViewResolver which creates instances of JstlView for rendering the View.**

当你没有声明ViewResolver时，spring会给你注册一个默认的ViewResolver，其是JstlView的实例。它通过RequestDispatcher寻找资源（视图），不过这个资源也可能是Servlet，也就是说，Controller中方法返回字符串（视图名），也可能会解析成Servlet。当你的请求路径与视图名相同时，就会发生死循环。

这就是异常提示的信息。不过我依然不明白为什么配置了视图解析还是不行，依据网上的方法可以解决问题，那就是在测试类中再配置一遍视图

@ContextConfiguration(classes = { com.wthfeng.hello.config.WebConfig.class}) //加载配置文件
    @WebAppConfiguration   //测试时启动一个web服务
    @RunWith(SpringJUnit4ClassRunner.class) //表明用spring test进行测试
    public class TestJavaConfig { 
    
        private MockMvc mockMvc;
    
        @InjectMocks
        private StudentController studentController;
    
        @Mock
        private StudentService studentService;
    
        @Before
        public void setUp(){ 
            MockitoAnnotations.initMocks(this);
            InternalResourceViewResolver resolver = new InternalResourceViewResolver(); //配置视图解析器
            resolver.setPrefix("/WEB_INF/views");
            resolver.setSuffix(".jsp");
            mockMvc = MockMvcBuilders.standaloneSetup(studentController).setViewResolvers(resolver).build();
    
        }
        @Test
        public void testList()throws Exception{ 
            mockMvc.perform(get("/list")).andExpect(view().name("list")).andExpect(model().attributeExists("StudentList"));
        }
    }```

[http_blog.csdn.net_wthfeng_article_details_52742830]: http://blog.csdn.net/wthfeng/article/details/52742830
[http_stackoverflow.com_questions_18813615_how-to-avoid-the-circular-view-path-exception-with-spring-mvc-test]: http://stackoverflow.com/questions/18813615/how-to-avoid-the-circular-view-path-exception-with-spring-mvc-test
[https_myshittycode.com_2014_01_17_mockmvc-circular-view-path-view-would-dispatch-back-to-the-current-handler-url-view-again]: https://myshittycode.com/2014/01/17/mockmvc-circular-view-path-view-would-dispatch-back-to-the-current-handler-url-view-again/

Spring boot 报错：Circular view path [...]: would dispatch back to the current handler

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