servlet文件上传文件名编码 [英] servlet file upload filename encoding

问题描述

我使用 Apache Commons Fileupload 工具进行标准文件上传.我的问题是，如果上传的文件包含特殊字符(á、é、ú 等)，我将无法获得正确的文件名.它们都被转换为 ?标志.

I am using the Apache Commons Fileupload tools for standard file upload. My problem is that I cannot get the proper filename of uploaded files if they contain special characters (á, é, ú, etc.) They all get converted to ? signs.

request.getCharacterEncoding() 表示 UTF-8，但我在字符串 fileItem.getName() 中获得的字节对于我的所有特殊字符都是相同的.

request.getCharacterEncoding() says UTF-8, but the bytes I get in the string fileItem.getName() are all the same for all my special characters.

你能帮我看看有什么问题吗?

Can you help me what's wrong?

(一些细节:在 Windows 上使用 Firefox 3.6.12、Weblogic 10.3)

(Some details: using Firefox 3.6.12, Weblogic 10.3 on Windows)

这是我的代码片段:

 public CommandMsg(HttpServletRequest request) {
    Enumeration names = null;
    if (isMultipart(request)) {
      FileItemFactory factory = new DiskFileItemFactory();
      ServletFileUpload upload = new ServletFileUpload(factory);
      try {
        List uploadedItems = upload.parseRequest(request);
        Iterator i = uploadedItems.iterator();
        FileItem fileItem = null;
        while (i.hasNext()) {
          fileItem = (FileItem) i.next();
          if (fileItem.isFormField()) {
            // System.out.println("isFormField");
            setAttribute(fileItem.getFieldName(), fileItem.getString());
          } else {
            String enc = "utf-8";
            enc = request.getCharacterEncoding();
            String fileName = fileItem.getName();
            byte[] fnb = fileItem.getName().getBytes();
            byte[] fnb2 = null;
            try {
                fnb2 = fileItem.getName().getBytes(enc);
                String t1 = new String(fnb);
                String t2 = new String(fnb2);
                String t3 = new String(fnb, enc);
                String t4 = new String(fnb2, enc);
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            setAttribute(fileItem.getFieldName(), fileItem);
          }
        }
      } catch (FileUploadException ex) {
        ex.printStackTrace();
      }

// etc..

推荐答案

我遇到了同样的问题，就这样解决了.

I had the same problem and solved it like this.

ServletFileUpload upload = new ServletFileUpload(factory);
upload.setHeaderEncoding("UTF-8"); 

FileItemIterator iter = upload.getItemIterator(request);
while (iter.hasNext()) {
    FileItemStream item = iter.next();
    String name = item.getFieldName();
    InputStream stream = item.openStream();
    if (item.isFormField()) {
        String value = Streams.asString(stream, "UTF-8");
    } 
}

如果您的代码基于 http://commons.apache.org/中提供的示例fileupload/streaming.html 那么你需要确保你在上面的两个地方设置了 UTF-8.

If you based your code on the example provided in http://commons.apache.org/fileupload/streaming.html then you need to make sure you set UTF-8 in two places above.

这篇关于servlet文件上传文件名编码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！