文件下载:"Content-disposition","attachment; filename=中文名>>>解决方案

摘录自：http://blog.csdn.net/wangzhi_821/article/details/5047777

文件下载时常会出现如下问题： response.setHeader("Content-disposition","attachment; filename="+as+"");
如果as直接写中文名字时，就会直接在IE页面打开Excel文件(弹出后点打开会在IE页面打开,注意此时的“你想打开或保存此文件吗？”，名称会显示一个类似CAK....的名称,实现上并不是正常的 *.xls格式的名称)，如图所示:



而不是另外弹出并打开Excel文件。解决办法是:(程序片段)

String as = "我明白了.xls";
String fileName = as;// = Java.net.URLEncoder.encode(as, "UTF-8");
/* 根据request的locale 得出可能的编码，中文操作系统通常是gb2312 */
fileName = new String(as.getBytes("GB2312"), "ISO_8859_1");
as = fileName;
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-disposition", "attachment; filename=" + as
+ "");

BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
// bis = new BufferedInputStream(new
// FileInputStream(getServletContext().getRealPath("" + filename)));
bis = new BufferedInputStream(new FileInputStream(dirFile));
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);
}
} catch (final IOException e) {
System.out.println("出现IOException." + e);
} finally {
if (bis != null)
bis.close();
if (bos != null)
bos.close();
}

程序段中最关键的一句：

new String(as.getBytes("GB2312"), "ISO_8859_1");

将文件命名转码. OK结果正常了>>>



这样就可以下载时用中文名称了,并且是另外打开Excel文件的。