下载文件时如何为不同的浏览器正确设置中文文件名 [英] how to set chinese filename correctly for different browsers when download file

问题描述

$ b

response.setHeader（content-disposition，attachment; filename =+ URLEncoder.encode 你好.txt，utf-8））;

它在Chrome中工作，但不在Firefox中，文件名是％E4％BD％A0％E5％A5％BD.txt 。

那么如何设置文件名？我希望文件名在chrome，firefox和IE（> = 8）中正确显示。

PS

  / ** 
返回编码的文件名
 * / 
 protected String getFileName（String filename）{
 try {
 HttpServletRequest request =（（ServletRequestAttributes）RequestContextHolder.getRequestAttributes（））。getRequest（）; 
 if（request.getHeader（User-Agent）。indexOf（MSIE）！= -1）{
 return'\''+ java.net.URLEncoder.encode（filename， UTF-8）+'\''; 
} 
 byte [] bytes = filename.getBytes（UTF-8）; 
 StringBuilder buff = new StringBuilder（bytes.length<< 2）; 
 buff.append（=？UTF-8？Q？）; 
 for（byte b：bytes）{
 int unsignedByte = b& 0xFF的; 
 buff.append（'='）。append（HEX_CHARS [unsignedByte>> 4]）。append（HEX_CHARS [unsignedByte& 0xF]）; 
} 
 return buff.append（？=）。toString（）; 
} catch（UnsupportedEncodingException e）{
 return filename; 
 
 
 
 private static final char [] HEX_CHARS = new char [] {'0'，'1'，'2'，'3'，'4' ，'5'，'6'，'7'，'8'，'9'，'A'，'B'，
'C'，'D'，'E'，'F'}; 
  

我在chrom 33.0，IE 8和firefox 26.0中测试这个代码，效果很好。

解决方案

虽然这是旧帖子，我想分享我得到的解决方案。它可以帮助某人。它在IE 11，Chrome 48和Fire-Fox 38上的工作就像魅力一样。下面是我如何在我的java代码中设置 content-disposition -

  final String encodedFileName = encodeFilename（fileNameToEncode）; 
 response.setHeader（Content-Disposition，attachment; filename * = UTF-8'+ encodedFileName）; 
 $ b $ private String encodeFilename（final String filename）
 {
 try {
 URI uri = new URI（null，null，filename，null）; 
字符串encodedName = uri.toASCIIString（）; 
返回encodedName; 
 
 catch（URISyntaxException ex）{
 return filename; 
 
 
  

引用 RFC 查看使用 filename * = utf-8'

I set like this:

response.setHeader("content-disposition", "attachment;filename=" + URLEncoder.encode("你好.txt", "utf-8"));

it works in chrome, but not in firefox, in firefox the file name is %E4%BD%A0%E5%A5%BD.txt.

So how to set file name? I want the file name to be showed correctly in chrome, firefox and IE(>=8)

PS:solved by a friend, share it with you, maybe it can help others.

/**
  return encoded file name
*/
protected String getFileName(String filename) {
    try{
        HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
        if (request.getHeader("User-Agent").indexOf("MSIE") != -1) {
            return '\"' + java.net.URLEncoder.encode(filename, "UTF-8") + '\"';
        }
        byte[] bytes = filename.getBytes("UTF-8");
        StringBuilder buff = new StringBuilder(bytes.length << 2);
        buff.append("=?UTF-8?Q?");
        for (byte b : bytes) {
            int unsignedByte = b & 0xFF;
            buff.append('=').append(HEX_CHARS[unsignedByte >> 4]).append(HEX_CHARS[unsignedByte & 0xF]);
        }
        return buff.append("?=").toString();
    }catch(UnsupportedEncodingException e){
        return filename;
    }
}

private static final char[] HEX_CHARS = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B',
        'C', 'D', 'E', 'F' };

I test this code in chrom 33.0, IE 8 and firefox 26.0, it works well.

解决方案

Though this is old post, I'd like to share the solution I got. It may help someone. It worked like charm for IE 11, Chrome 48 and Fire-Fox 38. Here is how I set the content-disposition in my java code-

final String encodedFileName = encodeFilename(fileNameToEncode); 
response.setHeader("Content-Disposition", "attachment; filename*=UTF-8''" + encodedFileName);

private String encodeFilename(final String filename)
{
  try{        
    URI uri = new URI(null, null, filename, null);      
    String encodedName = uri.toASCIIString(); 
    return encodedName;
  }
  catch(URISyntaxException ex){
      return filename;
  }
}

Ref the RFC to see the use of filename*=utf-8''

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