ApiOperation(value = "下载文件", httpMethod = "GET", notes = "downloadFile", response = String.class)

     public String downloadFile(HttpServletRequest request, HttpServletResponse response) {

        String fileName = "zabbix.txt";// 设置文件名

             if (fileName != null) {

                 //设置文件路径

                // String realPath = "D://zabbix_agentd.conf";

                 String realPath = "D:" + File.separator + "zabbix_agentd.conf";

                 File file = new File(realPath , fileName);

                 if (file.exists()) {

                     response.setContentType("application/force-download");// 设置强制下载不打开

                     response.addHeader("Content-Disposition", "attachment;fileName=" + fileName);// 设置文件名

                     byte[] buffer = new byte[1024];

                     FileInputStream fis = null;

                     BufferedInputStream bis = null;

                     try {

                         fis = new FileInputStream(file);

                         bis = new BufferedInputStream(fis);

                         OutputStream os = response.getOutputStream();

                         int i = bis.read(buffer);

                         while (i != -1) {

                             os.write(buffer, 0, i);

                             i = bis.read(buffer);

                         }

                         System.out.println("success");

                         InetAddress addr = InetAddress.getLocalHost();

                         String ip=addr.getHostAddress(); //获取本机ip

                         replacTextContent(ip);

                     } catch (Exception e) {

                         e.printStackTrace();

                     } finally {

                         if (bis != null) {

                             try {

                                 bis.close();

                             } catch (IOException e) {

                                 e.printStackTrace();

                             }

                         }

                         if (fis != null) {

                             try {

                                 fis.close();

                             } catch (IOException e) {

                                 e.printStackTrace();

                             }

                         }

                     }

                 }

             }

             return null;

     }

     /**

      * 替换文本文件中的 指定字符串

      * @param path

      * @throws IOException

      */

     public void replacTextContent(String ip){

         try {

             File file = new File("D:zabbix_agentd.conf");

             String content = FileUtils.readFileToString(file, "utf-8");

             //原有的内容

             String srcStr = "Hostname=192.168.1.177";

             //要替换的内容

             String replaceStr ="Hostname"+ ip;

             // 读

             FileReader in = new FileReader(content);

             BufferedReader bufIn = new BufferedReader(in);

             // 内存流, 作为临时流

             CharArrayWriter  tempStream = new CharArrayWriter();

             // 替换

             String line = null;

             while ( (line = bufIn.readLine()) != null) {

                 // 替换每行中, 符合条件的字符串

                 line = line.replaceAll(srcStr, replaceStr);

                 // 将该行写入内存

                 tempStream.write(line);

                 // 添加换行符

                 tempStream.append(System.getProperty("line.separator"));

             }

             // 关闭 输入流

             bufIn.close();

             // 将内存中的流 写入 文件

             FileWriter out = new FileWriter(file);

             tempStream.writeTo(out);

             out.close();

         }catch (Exception e) {

             e.printStackTrace();

         }

     }