public class WebConfig extends WebMvcConfigurerAdapter {//配置JSP视图解析器
    @Beanpublic ViewResolver viewResolver() {InternalResourceViewResolver resolver = new InternalResourceViewResolver();resolver.setPrefix("WEB-INF/views/");resolver.setSuffix(".jsp");resolver.setExposeContextBeansAsAttributes(true);return resolver;}}

@Controller
public class HomeController {@RequestMapping(value = "/home", method=GET)public ModelAndView home() {String message = "Hello";return new ModelAndView("home", "home", message);}
}

public class HomeControllerTest {@Testpublic void testHomePage() throws Exception {HomeController controller = new HomeController();MockMvc mockMvc = standaloneSetup(controller).build();mockMvc.perform(get("/home")).andExpect(view().name("home"));}}

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

if (path.startsWith("/") ? uri.equals(path) : uri.equals(StringUtils.applyRelativePath(uri, path))) {throw new ServletException("Circular view path [" + path + "]: would dispatch back " +"to the current handler URL [" + uri + "] again. Check your ViewResolver setup! " +"(Hint: This may be the result of an unspecified view, due to default view name generation.)");
}

public class TestJavaConfig {private MockMvc mockMvc;@InjectMocksprivate StudentController studentController;@Mockprivate StudentService studentService;@Beforepublic void setUp(){MockitoAnnotations.initMocks(this);InternalResourceViewResolver resolver = new InternalResourceViewResolver(); //在test中重新配置视图解析器resolver.setPrefix("/WEB_INF/views");resolver.setSuffix(".jsp");mockMvc = MockMvcBuilders.standaloneSetup(studentController).setViewResolvers(resolver).build();}@Testpublic void testList()throws Exception{mockMvc.perform(get("/home")).andExpect(view().name("home"));}