java web 下载文件

前台页面
<h4> 动态文件下载</h4> 
    <a href="downloadServlet">download文件下载</a> 

后台设计
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { 
        response.setContentType("application/x-msdownload");  
         
        String fileName = "文件下载.docx"; 
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8")); 
         
        OutputStream out = response.getOutputStream(); 
        String pptFileName = "F:\\自学材料\\sessioni笔记.docx"; 
         
        InputStream in = new FileInputStream(pptFileName); 
         
        byte [] buffer = new byte[1024]; 
        int len = 0; 
         
        while((len = in.read(buffer)) != -1){ 
            out.write(buffer, 0, len); 
        } 
         
        in.close(); 
    } 



前台也可以js控制
window.location.href='XXXXXXXXXX'


直接下载相应的文件，不用右键进行别存为