关于struts文件下载word文档乱码问题。

在struts1中做了个文件下载的功能，结果中文英文下载下来后都是乱码，求各位大虾给诊断诊断public ActionForward downLoad(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
DocumentForm documentForm = (DocumentForm) form;
String docid = request.getParameter("docid"); 
// if the document's id is null , return failure
if (docid == null || "".equals(docid))
return mapping.findForward("failure"); SecurityContext securityContext = SecurityContextHolder.getContext();
DocumentManager mgr = (DocumentManager) getBean("documentManager");
Document document = mgr.getDocument(docid);
String remotePath = document.getDocLocation();
String fileName = remotePath.substring(remotePath.lastIndexOf("/") + 1);
String downloadDir = servlet.getServletContext().getRealPath("/resources") + "/" + request.getRemoteUser() + "/download/"; File dirPath = new File(downloadDir); if (!dirPath.exists()) {
dirPath.mkdirs();
}
try {
URL url = new URL(remotePath);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.connect();
DataInputStream in = new DataInputStream(connection.getInputStream());
DataOutputStream outa = new DataOutputStream(new FileOutputStream(downloadDir + fileName));
byte[] buffer = new byte[4096];
int count = 0;
while ((count = in.read(buffer)) > 0) {
outa.write(buffer, 0, count);
}
outa.flush();
outa.close();
in.close();
} catch (Exception e) { } File file = new File(downloadDir + fileName); if (file.exists()) {
try { BufferedInputStream bis = null;
        BufferedOutputStream bos = null;
        OutputStream fos = null;
        InputStream fis = null;         String  filepath = file.getPath();
        fis = new FileInputStream(file);
        bis = new BufferedInputStream(fis);
        fos = response.getOutputStream();
        bos = new BufferedOutputStream(fos);         response.setHeader("Content-disposition",
                           "attachment;filename=" +fileName);
        response.setCharacterEncoding("UTF-8");
response.setContentType("UTF-8");
response.setContentType("Application/x-download;charset=UTF-8");          int bytesRead = 0;
        byte[] buffer = new byte[8192];
        while ((bytesRead = bis.read(buffer, 0, 8192)) != -1) {
            bos.write(buffer, 0, bytesRead);
        }
        bos.flush();
        fis.close();
        bis.close();
        fos.close();
        bos.close();
        
} catch (Exception e) {
System.out.println("when download file,there is an error!");
return mapping.findForward("failure");
}
} else {
}
   
return null;
}