java打包压缩文件下载到浏览器默认路径

1、controller层

 /**
 * 压缩打包文件下载到浏览器默认路径
 * @return
 */
@RequestMapping(value="/downloadZipFile")
@ResponseBody
public Object compressedFile(@RequestParam(value = "docIds",required = false)String docIds){
    List files=new ArrayList<>();
    List list=new ArrayList<>();
    String[] idList =docIds.split(",");
    for (String id:idList){
        list.add(id);
    }
    List atttendanchList = docManagerService.selByAttendanceId(list);
    for (DocManager docManager:atttendanchList){
        File file = new File(docManager.getDocPath()+docManager.getFileName());
        files.add(file);
    }
    //将多个文件压缩打包，下载到默认浏览器
    try {
        File zipFile=FileUtil.fileToZip(files,zipFilePath,ContentUtil.randomGen(6));//将多文件打包为zip文件
        FileSystemResource fileSource = new FileSystemResource(zipFile);
        Object o = FileUtil.downloadFile(fileSource.getInputStream(), fileSource.getFilename());
        zipFile.delete();//删除暂时存储的zip压缩包
        return o;
    } catch (IOException e) {
        return MarkUtil.markRetunMsg(false,e.getMessage());
    }
}

2、FileUtil类中fileToZip方法，如下：

 /**
     * 压缩文件
     * @param files
     * @param zipFilePath
     * @param fileName
     * @return
     */
    public static File fileToZip(List files, String zipFilePath, String fileName) {
        File zipFile = new File(zipFilePath + "/" + fileName + ".zip");
        new File(zipFilePath).mkdirs();
        FileInputStream fis = null;
        BufferedInputStream bis = null;
        FileOutputStream fos = null;
        ZipOutputStream zos = null;
        try {
            fos = new FileOutputStream(zipFile);
            zos = new ZipOutputStream(new BufferedOutputStream(fos));
            byte[] bufs = new byte[1024 * 10];
            for (File file : files) {
                //创建ZIP实体，并添加进压缩包
                String name=file.getName();
                String reName=name.substring(0,name.length()-6);//修改文件名称，再保存到zip文件中
                ZipEntry zipEntry = new ZipEntry(reName);//压缩
                zos.putNextEntry(zipEntry);//将每个压缩文件保存到zip文件中
                //读取待压缩的文件并写进压缩包里
                fis = new FileInputStream(file);
                bis = new BufferedInputStream(fis, 1024 * 10);
                int read = 0;
                while ((read = bis.read(bufs, 0, 1024 * 10)) != -1) {
                    zos.write(bufs, 0, read);
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        } catch (IOException e) {
            e.printStackTrace();
            throw new RuntimeException(e);
        } finally {
            //关闭流
            try {
                if (null != bis) bis.close();
                if (null != zos) zos.close();
            } catch (IOException e) {
                e.printStackTrace();
                throw new RuntimeException(e);
            }
        }
        return zipFile;
    }

3、FileUtil类中downloadFile方法，如下：

 /**
     * 下载文件到默认浏览器
     * @param in
     * @param fileName
     * @return
     */
    public static ResponseEntity downloadFile(InputStream in,String fileName) {
        try {
            byte[] testBytes = new byte[in.available()];
            HttpHeaders headers = new HttpHeaders();
            headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
            headers.add("Content-Disposition", String.format("attachment; filename=\"%s\"", MarkUtil.convertFileName(fileName)));
            headers.add("Pragma", "no-cache");
            headers.add("Expires", "0");
            return ResponseEntity
                    .ok()
                    .headers(headers)
                    .contentLength(testBytes.length)
                    .contentType(MediaType.parseMediaType("application/octet-stream"))
                    .body(new InputStreamResource(in));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

4、MarkUtil类中的convertFileName方法如下：

/**
 * chinese code convert
 * @param fileName
 * @return
 */
public static String convertFileName(String fileName) {
        if(isContainChinese(fileName)) {
            try {
                fileName = URLEncoder.encode(fileName, "UTF-8");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }
        return fileName;
    }

欢迎转载，但是要注释来源，谢谢

作者：mengmeng233
来源：CSDN
原文：https://blog.csdn.net/mengmeng2222222/article/details/90484775
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