文件下载时文件名过长导致截断的问题

直接用URLEncoder.encode(fileName,"UTF-8")，得到的文件名长度会被截断。
解决方法：
      文件名先用“GB2312”编码，然后用“ISO8859_1”解码.

代码例子:
filename=URLEncoder.encode(filename,"GB2312");
filename=URLDecoder.decode(filename, "ISO8859_1");
response.setContentType("application/x-msdownload");

response.setHeader("Content-disposition","attachment; filename="+filename);



// 直接用IE打开
//response.setHeader("Content-disposition", "filename=" + filename);

BufferedInputStream bis = null;
BufferedOutputStream bos = null;

try {
bis = new BufferedInputStream(new FileInputStream(
Constants.listFilePath + directoryname + "\\" + filename1));
bos = new BufferedOutputStream(response.getOutputStream());

byte[] buff = new byte[2048];
int bytesRead;

while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff, 0, bytesRead);
}
bos.flush();
} catch (final IOException e) {
log.error(e.toString());
}

按照你说的还是不行呀