下载网络文件的Java实现-优快云博客

本文介绍了如何使用Java实现从网络下载文件的功能，包括获取URL、打开连接、读取输入流并写入输出流，同时处理可能出现的异常情况。

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public String downLoadFileContent() throws IOException{
         // 下载网络文件 
        int bytesum = 0;
        int byteread = 0;
        response = CustomerUtil.getResponse();
        request = CustomerUtil.getRequest();
        String filePath = request.getParameter("filePath");//http://localhost:8080/mypro/img
        String fileName = request.getParameter("fileName");//201212121212.txt
        URL url = new URL(filePath+fileName);
          
        try {
            URLConnection conn = url.openConnection();
            InputStream inStream = conn.getInputStream();
            OutputStream fs=response.getOutputStream();
            //设置response的编码方式
            response.setContentType("application/x-msdownload");
            response.setHeader("Content-Disposition","attachment;filename="+new String(fileName.getBytes("gbk"),"iso-8859-1")); 
            response.setHeader("Content-Disposition","attachment;filename="+fileName);
            byte[] buffer = new byte[1204];
            int length;
            while ((byteread = inStream.read(buffer)) != -1) {
                bytesum += byteread;
                fs.write(buffer, 0, byteread);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

本文出自 “小浩” 博客，请务必保留此出处http://zhangchi.blog.51cto.com/5214280/1392282

转载于:https://my.oschina.net/zhangshuge/blog/633881