Java下载文件方法

 public static void download(String path, HttpServletResponse response) {  
         try {  
             // path是指欲下载的文件的路径。  
             File file = new File(path);  
             // 取得文件名。  
             String filename = file.getName();  
             // 以流的形式下载文件。  
             InputStream fis = new BufferedInputStream(new FileInputStream(path));  
             byte[] buffer = new byte[fis.available()];  
             fis.read(buffer);  
             fis.close();  
             // 清空response  
             response.reset();  
             // 设置response的Header  
             response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes()));  
             response.addHeader("Content-Length", "" + file.length());  
             OutputStream toClient = new BufferedOutputStream(response.getOutputStream());  
             response.setContentType("charset=UTF-8");
             toClient.write(buffer);  
             toClient.flush();  
             toClient.close();  
         } catch (IOException ex) {  
                ex.printStackTrace();  
            }  
        }  
     public Object downLoadImg(String path){
         
         return true;
     }