各位仁兄 请问如何在网页中实现文件的下载，高分相送，谢谢啦。！

Question

各位仁兄 请问如何在网页中实现文件的下载，高分相送，谢谢啦。！

Answer 1

<a href="abc.rar">download abc</a>

Answer 2

<tr>
            <td height="25" class="tdcor">附&nbsp;&nbsp;件&nbsp;</td>
            <td colspan="3" height=50>
                <%
                    if (null != publish.getAttatchFilename() &&
publish.getAttatchFilename().length() > 0) {
                %>
                <a href="publish_do.jsp?method=download&fileName=
<%=URLEncoder.encode(publish.getAttatchFilename(),"GBK")%>">
<%=URLDecoder.decode(publish.getAttatchFilename(),"GBK")%></a>
                <%
                    }
                %>
            </td>
</tr>
     <% else if (null != method && method.equals("download")) {//下载附件        String fileName = request.getParameter("fileName");
        File file = new File(Constants.PUBLISH_FILE_PATH + "/" + URLDecoder.decode(fileName,"GBK"));
        response.reset();
        response.setContentType("application/octet-stream; charset=GBK");
        response.addHeader("Content-Disposition", "attachment; filename=" + CourseDetailBusiness.transfer(URLDecoder.decode(fileName,"GBK"),"GBK","ISO-8859-1"));
        response.setContentLength((int) file.length());        byte[] buffer = new byte[4096];
        BufferedOutputStream output = null;
        BufferedInputStream input = null;        // 写缓冲区：
        try {
            output = new BufferedOutputStream(response.getOutputStream());
            input = new BufferedInputStream(new FileInputStream(file));            int n = (-1);
            while ((n = input.read(buffer, 0, 4096)) > -1) {
                output.write(buffer, 0, n);
            }
            response.flushBuffer();
        }
        catch (Exception e) {
        } // maybe user cancelled download
        finally {
            if (input != null) input.close();
            if (output != null) output.close();
        }

Answer 3

这样可以下载，但是我希望是用java代码写的，可以下载任何文件格式的文件！
不过仍然很感谢你！

Answer 4

<%@ page language="java"  pageEncoding="GB18030"%>
<%
out.clear();
out = pageContext.pushBody(); 
  String fileName = request.getParameter("filename");  InputStream inStream=new FileInputStream(fileName);
 //设置输出的格式
  response.reset();
  response.setContentType("bin");
  response.addHeader("Content-Disposition","attachment; filename=\"" + ruleName + "\"");
 //循环取出流中的数据
  byte[] b = new byte[100];
  int len;
  while((len=inStream.read(b)) >0)
  response.getOutputStream().write(b,0,len);  
  inStream.close();
  out.clear(); 
  out = pageContext.pushBody(); 
%>