签名Applet和服务器端控制器之间的通信 [英] Communication between Signed Applet and server side Controller

问题描述

我创建了一个签名的applet上传文件到服务器。 code运行良好，但我想从applet的文件发送到服务器端控制器，其中code已经把保存该文件到服务器。

I have created a signed applet for uploading a file to server. Code is running fine but I want to send that file from applet to server side controller where the code has placed to save that file to server.

我的SENDFILE code在签署Applet的：

public static void sendFile(String destFileName) throws IOException {       
        String filePrivacy = "Public";
        String fileKeyword = "uploadFileDocumentName";
        String fileComments = "fileComments";
        String fileType = "txt";
        String fileFolder = "/Works";
        String fileDetails = "";
        HttpClient client = new HttpClient();
        PostMethod postMethod = new PostMethod(
                "http://localhost:8080/fileUpload/encryptFileUpload.works?filePrivacy="+filePrivacy+"&fileKeyword="+fileKeyword+"&fileComments="+fileComments+"&fileType="+fileType+"&fileFolder="+fileFolder+"&fileDetails="+fileDetails);

        File f = new File(destFileName);
        Part[] parts = {new FilePart(f.getName(), f)};
        postMethod.setRequestEntity(new MultipartRequestEntity(parts, postMethod.getParams())); 
        postMethod.setRequestHeader("Content-type", "text/xml; charset=ISO-8859-1");
        client.executeMethod(postMethod);
        postMethod.releaseConnection();
    }

和我的UploadController的方法是这样的：

@RequestMapping(value = "/encryptFileUpload.works")
    public String uploadEncryptFile(String filePrivacy,
            String fileKeyword,
            String fileComments,
            String fileType,
            String fileFolder,
            HttpServletRequest request, HttpServletResponse response) {
        try {
            Map<String, Object> requestMap = new HashMap<String, Object>();
            requestMap.put(DMSConstants.JCR_FILE_PRIVACY, filePrivacy);
            requestMap.put(DMSConstants.JCR_FILE_KEYWORD, fileKeyword);
            requestMap.put(DMSConstants.JCR_FILE_COMMENTS, fileComments);
            requestMap.put(DMSConstants.JCR_FILE_TYPE, fileType);
            MultipartHttpServletRequest m = (MultipartHttpServletRequest) request;
            MultipartFile file = m.getFile("Filedata");
            Node folderNode = contentPublishService.getFolderNode(fileFolder);
            Node node = contentPublishService.saveFileToRepository(folderNode,
                    file.getInputStream(), file.getOriginalFilename(),
                    requestMap);
        } catch (RepositoryException e) {
            e.printStackTrace();        
        return null;
    }

在该行 MultipartHttpServletRequest M =（MultipartHttpServletRequest）请求; 我越来越喜欢异常：

java.lang.ClassCastException: org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestWrapper cannot be cast to org.springframework.web.multipart.MultipartHttpServletRequest
    at com.nmmc.works.web.controller.FileUploadController.uploadEncryptFile(FileUploadController.java:177)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)

那么，是走错了，我应该在我的code做什么样的变化。而第二件事是谁我可以在控制器获取文件？

So where is going wrong and what changes should i do in my code. And second thing is who can i get file at controller?

推荐答案

需要更多的细节...

Need more details...

只是一些建议...

什么是的部分的对象是什么？

What is the Part object is?

如果你想通过上传文件'零件'我可能会建议只是覆盖的 MultipartEntity 的方法的writeTo上传大文件，而不是使用数组，或者也许是没有的事？

If you want to upload file by 'parts' I may recommend just to override MultipartEntity writeTo method to upload big file instead of using arrays or maybe it is not the thing?

就铸造......我可以猜测该行可能会导致问题。

Concerning the cast... I may guess that line may cause the problem

MultipartHttpServletRequest m = (MultipartHttpServletRequest) request;

作为规则的HttpClient工作在削减用的FileUpload库。那么，为什么不能用它代替？

As a rule HttpClient is working in pare with FileUpload lib. So why not to use it instead?

还有一件事......你点内容哑剧为文本/ XML 但它是XML尤其是如果它是一个二进制文件的一部分？难道不应该是某种应用程序/八位字节流呢？

And one more thing... you point the content mime as text/xml but is it xml especially if it is a bin file part? Shouldn't it be some kind of application/octet-stream instead ?

无论如何，这将是更有帮助你在你的问题提供更多的细节。

Anyway, that would be more helpful you to provide more details in your question

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