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多部分表單POST提交請求獲取損壞的文件

[英]multipart form POST submit request fetching broken files

我無法正確上傳文件。

我的問題摘要:正在上傳的任何文件(* .docx,* .pdf,* .jpg / png / bmp等)都在服務器端收到損壞。

我的環境: JSP + Spring 3 MVC + Java。

我嘗試了不同的方法,包括BalusC 在此提出的方法,但失敗了。 原始圖片上傳后失真

這些是失敗嚴重失敗的示例上傳。

我的代碼: tempform.jsp

<form:form method="POST" acceptCharset="ISO-8859-15" action="submit.htm"
commandName="commandform" enctype="multipart/form-data" >
...
<input  name ="file0[] type="file" id="file0" multiple>
...
<input type="submit" name="submit">

controller.java

@RequestMapping(value = "/submit", method = RequestMethod.POST)
public ModelAndView submitRequest(@ModelAttribute("commandform") Request req, HttpServletRequest request, HttpServletResponse response, ModelMap model){
try {
 MultipartHttpServletRequest tempPart = (MultipartHttpServletRequest) httpReq;
         //file being transported is original.jpg and is only one.
         MultipartFile filePart = tempPart.getFile("file0[]");
         String fileName1 = filePart.getOriginalFilename();
         InputStream fileContent = filePart.getInputStream();

         //printing file here in this step for debugging purpose. Using jpg type only for example purpose.
         BufferedImage bImageFromConvert = ImageIO.read(fileContent);
         ImageIO.write(bImageFromConvert, "jpg", new File(
                "e:/mynewfile.jpg"));
         //file is created at location but with distorted version as shown in image.
         ...
}catch(Exception ex){
...
}
}

我懷疑 :內容類型是否對此行為負責? 我在我的web.xml強制使用帶有<init-param>值的CharacterEncodingFilter作為ISO-8859-15 我在jsp頁面中也使用了ISO-8859-15編碼,因為我還必須處理歐洲文本。 我們非常歡迎任何幫助或指導。 提前致謝。

我認為問題不在於acceptCharset="ISO-8859-15"
我根據Spring IO網站的入門指南整理了一個測試用例(使用Spring boot ): Spring IO文件上傳示例

我還為一個正在進行文件上傳的項目編寫了一個Spring 3 MVC控制器。 它類似於我在下面顯示的示例。

使用這個Spring啟動測試用例,我可以使用UTF-8和ISO-8859-15上傳您的示例圖像。 它工作正常。 當然,我沒有像你一樣使用CharacterEncodingFilter
這是我的一些代碼,因此您可以與您的代碼進行比較。

我希望它有所幫助。

Application.java:

@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application extends SpringBootServletInitializer {

    @Bean
    public MultipartConfigElement multipartConfigElement() {
        MultipartConfigFactory factory = new MultipartConfigFactory();
        factory.setMaxFileSize("128KB");
        factory.setMaxRequestSize("128KB");
        return factory.createMultipartConfig();
    }

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(Application.class);
    }

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

FileUploadController.java:

@Controller
public class FileUploadController {

    @RequestMapping("/")
    public String welcome() {
        return "welcome";
    }

    @RequestMapping(value="/upload", method=RequestMethod.GET)
    public @ResponseBody String provideUploadInfo() {
        return "You can upload a file by posting to this same URL.";
    }

    @RequestMapping(value="/upload", method=RequestMethod.POST)
    public @ResponseBody String handleFileUpload(@RequestParam("name") String name, 
            @RequestParam("file") MultipartFile file){
        if (!file.isEmpty()) {
            try {
                byte[] bytes = file.getBytes();
                BufferedOutputStream stream = 
                        new BufferedOutputStream(new FileOutputStream(new File(name)));
                stream.write(bytes);
                stream.close();
                return "You successfully uploaded " + name + " into " + name;
            } catch (Exception e) {
                return "You failed to upload " + name + " => " + e.getMessage();
            }
        } else {
            return "You failed to upload " + name + " because the file was empty.";
        }
    }
}

welcome.jsp的片段:

<%-- 
<form:form action="upload" method="POST" acceptCharset="UTF-8" enctype="multipart/form-data"  >
--%>
<form:form action="upload" method="POST" acceptCharset="ISO-8859-15" enctype="multipart/form-data"  >
  <table>
      <tr>
        <td>  
            <!-- <input type="hidden" name="action" value="upload" />  -->
            <strong>Please select a file to upload :</strong> <input type="file" name="file" />
        </td>
      </tr>
      <tr>
        <td>Name: <input type="text" name="name"><br />
        </td>
      </tr>
      <tr>
        <td>
         <input type="submit" value="Upload"> Press here to upload the file!
        </td>
      </tr>
  </table>
</form:form>

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