追加java实现文件下载的方法

下载压缩包

//realName为要下载文件的名称
 public static void downloadStore(HttpServletRequest request,HttpServletResponse response,String realName) throws Exception {  
        BufferedInputStream bis = null;  
        BufferedOutputStream bos = null;  
        String ctxPath = request.getSession().getServletContext().getRealPath("/")+ FileOperateUtil.UPLOADDIR+"chainCompany/";  
        String downLoadPath = ctxPath+realName;  
        response.reset();
        response.setContentType("application/zip");// 定义输出类型  
        response.setHeader("Content-disposition", "attachment; filename=" + realName);
        bis = new BufferedInputStream(new FileInputStream(downLoadPath));  
        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);  
        }  
        bis.close();  
        bos.close();  
    }  

下载文件

 /** 
     * 下载
    *realName为要下载文件的名称
     */  
    public static void download(HttpServletRequest request,HttpServletResponse response,String realName) throws Exception {  
        BufferedInputStream bis = null;  
        BufferedOutputStream bos = null;  
       //ctxPath 下载文件的路径
        String ctxPath = request.getSession().getServletContext().getRealPath("/")+  
 FileOperateUtil.UPLOADDIR;  
        String downLoadPath = ctxPath+realName;  
        response.reset();
        response.setContentType("application/vnd.ms-excel");        // 改成输出excel文件
        response.setHeader("Content-disposition", "attachment; filename=" + realName);
        bis = new BufferedInputStream(new FileInputStream(downLoadPath));  
        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);  
        }  
        bis.close();  
        bos.close();  
    }