我的直接下载excel文件的代码错在哪呢？请指点？

改成这样：我测试成功了。<%@page import="java.util.*"%>
<%@page import="java.io.*"%>
<%@page import="java.net.*"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title></title>
</head>
<body leftmargin="0" topmargin="0" bgcolor="#FFFFFF">
<%
response.reset();
    String filename = "a.xls";    response.setContentType("application/vnd.ms-excel");    BufferedInputStream bis = null;
    BufferedOutputStream bos = null;
    try {
        bis = new BufferedInputStream(new FileInputStream(request.getRealPath(filename)));
        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) {
        throw e;
    } finally {
        if (bis != null)
            bis.close();
        if (bos != null)
            bos.close();
    }
%>
</body>
</html>

解决方案 »

  1.   

    try {
     
                 //下载文件
                response.reset();
                response.setContentType("bin");
                response.setHeader("Content-Disposition",
                                   "attachment; filename=\"" + fileName +    
                          //fileName 为文件名，可以为中文。
                                   "\"");            ServletOutputStream out = response.getOutputStream();
                java.io.File ffile = new java.io.File(request.getRealPath(filePath1));
              //filePath1 为 文件所在目录
                if (!ffile.exists()) {
                    errMsg = URLEncoder.encode("系统找不到该文件！", "GBK");
                    linkStr = "/error/Error.jsp?errMsg=" + errMsg;
                    this.forward(linkStr, request, response);
                    return;
                }            InputStream inStream = new FileInputStream(ffile);            //循环取出流中的数据
                byte[] b = new byte[1024];
                int len;
                while ( (len = inStream.read(b)) > 0) {
                    out.write(b, 0, len);
                }
                out.close();
                inStream.close();
            }
            catch (Exception ex) {
                ex.printStackTrace();
                this.exceptionError(request, response);
            }