HTML+JavaScript+SpringBoot：实现PDF文件批量下载功能

àì夳堔傛蜴生んèń 2024-03-23 12:12 65阅读 0赞

#### HTML+JavaScript+SpringBoot：实现PDF文件批量下载功能 ####

*  前言
 *  一、HTML+JavaScript
 *  二、SpringBoot

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## 前言 ##

本文主要分享了实现 PDF 文件批量下载的 HTML+JavaScript+SpringBoot 全套代码

大家觉得有用的话麻烦点赞+收藏哦！谢谢您

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## 一、HTML+JavaScript ##

content.html
    
    //实现批量下载的按钮
    <button class="btn btn-primary" type="button" onclick="xzAllws('{ {contentItem.id}}')" style="font-size: 12px">PDF文件批量下载</button>

content.js
    
    function xzAllws(id) {
        
        var url = '/xzAllws.do?contentid=' + id;
        window.open(url)
    }

## 二、SpringBoot ##

download.java
    
    @RequestMapping(value = "/xzAllws.do", method = RequestMethod.GET)
    @ResponseBody
    public void xzAllws(HttpServletRequest request, HttpServletResponse response, @RequestParam("contentid") Integer contentid) throws Exception {
        
        DynamicDataSource.router("文书信息库");//切换到文书信息库
           //filePath是下载路径集合
           //fileName是文件名称
        List<String> paths = new LinkedList<>();
        List<String> childName = new LinkedList<>();
        //这里省去了filePath和fileName的定义过程
        //需要自己定义下载路径集合和文件名称
        String fileName = "PDF文件批量下载压缩包"+ ".zip";
        DownloadUtils.downloadZip(paths,childName,fileName,response,request);
    }

DownloadUtils.java
    
      /**
      * 下载zip
      */
     public static void downloadZip(List<String> paths, List<String> childName, String fileName, HttpServletResponse response, HttpServletRequest request){
        
         ZipOutputStream zos = null;
         BufferedInputStream br = null;
         try {
        
             //文件的名称
             response.reset();
             //设置格式
             response.setContentType("application/x-msdownload");
             response.setHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(fileName, "UTF-8"));
             //ZipOutputStream来对文件压缩操作
             zos = new ZipOutputStream(response.getOutputStream());
             //循环下载文件，并将之放到ZipOutputStream中
             for (int i = 0 ; i < paths.size(); i ++) {
        
                 String name = childName.get(i);
                 String path = paths.get(i);
                 //filePath是下载路径集合
                 //fileName是文件名称
                 zos.putNextEntry(new ZipEntry(name));
                 br=new BufferedInputStream(new FileInputStream(path));
                 byte[] buffer = new byte[1024];
                 int r = 0;
                 while ((r = br.read(buffer)) != -1) {
        
                     zos.write(buffer, 0, r);
                 }
                 br.close();
             }
             zos.flush();
    
         } catch (IOException e) {
        
            e.printStackTrace();
         }finally {
        
             try {
        
                 zos.close();
                 br.close();
             } catch (IOException e) {
        
                 System.out.println();
             }
         }
     }