java 下载网络中在文件

    URL url = new URL(Config.local + "/excel/" + name);  
                HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();  
      
                // 设置请求信息  
                httpConnection.setRequestProperty("GET","/down.zip HTTP/1.1");  
      
                // 设置接受信息  
                httpConnection.setRequestProperty("Accept","image/gif,image/x-xbitmap,application/msword");  
      
                // 设置连接信息  
                httpConnection.setRequestProperty("Connection","Keep-Alive");  
      
                // 获得输入流  
                InputStream input = httpConnection.getInputStream();  
      
                // 创建随机文件  
                flist.add(new File(name));  
                RandomAccessFile oSavedFile = new RandomAccessFile(name,"rw");  
      
                byte[] b = new byte[1024];  
                int nRead;  
      
                // 从输入流中读入字节流，然后写到文件中  
                while ((nRead = input.read(b,1024)) > 0) {  
                    oSavedFile.write(b,nRead);  
                }  
      
                input.close();  
                oSavedFile.close();  
                httpConnection.disconnect();