vue下载功能 Java后台代码实现

vue页面类似下载功能

        如图：

vue代码

    
         下载
        
    

前台绑定接口，后台实现功能代码： 

String path = null;
    String str=upgrade.substring(0, upgrade.indexOf("_"));
    String s=upgrade.substring(str.length()+1, upgrade.length());
    int flag = Integer.parseInt(s);
    if(flag!=0){
      //Linux客户端路径
      if(flag == AppConfig.Virus_VERSION){
        path = System.getProperty("user.dir") + File.separator + "client_upgrade" + File.separator
                +upgrade+".tar.gz";
      }else if(flag == AppConfig.Leak_VERSION) {
        //Win客户端路径
        path = System.getProperty("user.dir") + File.separator + "client" + File.separator
                +upgrade+".tar.gz";
      }
    }
    File file = new File(path);
    //判断文件是否存在
    if (!file.isFile()) {
      throw new FortException(new FortError(StatusCode.ERROR, "文件不存在"));
    }

    String filename = FilenameUtils.getName(path);
    response.setHeader("Content-Disposition",
            "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));

    try (FileInputStream fileInputStream = new FileInputStream(file);
         BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
         BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(
                 response.getOutputStream())) {
      FileCopyUtils.copy(bufferedInputStream, bufferedOutputStream);
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      // 使用的是try-with-resources
    }