一般情况下,大家都是这样:

fileName = URLEncoder.encode(fileName, "UTF-8");response.reset();response.setHeader("Content-disposition", "attachment;filename=" + fileName);response.setContentType("application/octet-stream; charset=UTF-8");IoUtil.copy(inputStream, response.getOutputStream());

其实乱码就是乱在;filename=” + fileName这里,对文件名的编码设定上。

使用URLEncoder.encode(filepath,”UTF-8″)虽然可以解决在提示下载框中正确显示汉字文件名的问题,并且在选择保存,然后打开的情况下,文件名称也可以正确的显示。

但是在提示下载框中,选择直接打开,则文件名称变成了类似“%E7%BB%99%E7%94%A8%E6%88%B7%E6%8F%90%E4%BE%9B%E7%9A%84%E4%B8%8B%E8%BD%BD%E6%96%87%E4%BB%B6%E5%90%8D”的样子。

为了解决这个问题,百度了好久,是这样的

String downloadfile = new String(filepath.getBytes(“gb2312″),”iso8859-1”);

response.addHeader(“Content-Disposition”,”attachment;filename=” + downloadfile );

还有这样

String userAgent = request.getHeader(“User-Agent”);
String formFileName = “员工表.xls”;

// 针对IE或者以IE为内核的浏览器:
if (userAgent.contains(“MSIE”) || userAgent.contains(“Trident”)) {
formFileName = java.net.URLEncoder.encode(formFileName, “UTF-8”);
} else {
// 非IE浏览器的处理:
formFileName = new String(formFileName.getBytes(“UTF-8”), “ISO-8859-1”);
}
response.setHeader(“Content-disposition”,String.format(“attachment; filename=\”%s\””, formFileName));
response.setContentType(“multipart/form-data”);
response.setCharacterEncoding(“UTF-8”);

发现都不能解决问题,不懈努力,崩溃边缘,最终解决

fileName = URLEncoder.encode(fileName, "UTF-8");response.reset();// fileName后面设置编码格式是重点response.setHeader("Content-disposition", "attachment;filename="+fileName+";"+"filename*=utf-8''"+fileName);response.setContentType("application/octet-stream; charset=UTF-8");IoUtil.copy(inputStream, response.getOutputStream());

完美解决!!!