HttpServletRequest 到 MultipartHttpServletRequest：

Question

我正在尝试为包含以下方法的 Controller 类编写 Junit 测试。 @RequestMapping(value = "/mappingUrl", method = RequestMethod.POST)public String uploadFileMethod(HttpServletResponse httpResponse, HttpServletRequest httpRequest, ModelMap model) throws Exception {  try {    MultipartFile multipartFile = ((MultipartHttpServletRequest) httpRequest).getFile("fileName");   }  catch(Exception e){}}在测试类中，我有以下方法 @Testpublic void testUploadFileMethod() throws Exception {mockMVC.perform(post("/mappingUrl")).andExpect(status().isOk());}执行测试时出现以下异常：java.lang.ClassCastException: org.springframework.mock.web.MockHttpServletRequest cannot be cast to org.springframework.web.multipart.MultipartHttpServletRequest有没有一种方法可以在不更改现有代码的情况下测试该方法？该类在整个应用程序中使用，我担心我可能会破坏其他东西。

Answer 1

你试一试

MockMultipartFile myFile = new MockMultipartFile("data", "myFile.txt", "text/plain", "myFileContent".getBytes());

mockMVC.perform(MockMvcRequestBuilders.multipart("/mappingUrl")

                    .file(myFile)).andExpect(status().isOk());

正如这里所解释的