生成zip文件,并下载

1. zip生成

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/**
    * @param sourceFilePath :待压缩的文件路径 文件的目录,并非文件路径
    * @param zipFilePath    :压缩后存放路径
    * @param fileName       :压缩后文件的名称  不要传.zip名称
    * @return
    */
   public static boolean fileToZip(String sourceFilePath, String zipFilePath, String fileName) {
       boolean flag = false;
       File sourceFile = new File(sourceFilePath);
       FileInputStream fis = null;
       BufferedInputStream bis = null;
       FileOutputStream fos = null;
       ZipOutputStream zos = null;
 
       if (sourceFile.exists() == false) {
           System.out.println("待压缩的文件目录:" + sourceFilePath + "不存在.");
           sourceFile.mkdir(); // 新建目录
       }
       try {
           File zipFile = new File(zipFilePath + "/" + fileName + ".zip");
           if (zipFile.exists()) {
               System.out.println(zipFilePath + "目录下存在名字为:" + fileName + ".zip" + "打包文件.");
           } else {
               File[] sourceFiles = sourceFile.listFiles();
               if (null == sourceFiles || sourceFiles.length < 1) {
                   System.out.println("待压缩的文件目录:" + sourceFilePath + "里面不存在文件,无需压缩.");
               } else {
                   fos = new FileOutputStream(zipFile);
                   zos = new ZipOutputStream(new BufferedOutputStream(fos));
                   byte[] bufs = new byte[1024 * 10];
                   for (int i = 0; i < sourceFiles.length; i++) {
                       //创建ZIP实体,并添加进压缩包
                       ZipEntry zipEntry = new ZipEntry(sourceFiles[i].getName());
                       zos.putNextEntry(zipEntry);
                       //读取待压缩的文件并写进压缩包里
                       fis = new FileInputStream(sourceFiles[i]);
                       bis = new BufferedInputStream(fis, 1024 * 10);
                       int read = 0;
                       while ((read = bis.read(bufs, 0, 1024 * 10)) != -1) {
                           zos.write(bufs, 0, read);
                       }
                   }
                   flag = true;
               }
           }
       } 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 flag;
   }  

hutool 更简单

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File zip = cn.hutool.core.util.ZipUtil.zip(shpPath);<br>返回zip地址

  

调用

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// 获取文件的 上一级目录
ZipUtil.fileToZip(parentFile.getPath(), parentFile.getPath(), fd_name);  

2. 下载zip文件

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DownloadFile.downloadFile(downFile, fd_name, response, true);
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public static void downloadFile(File file,String newNameTo,HttpServletResponse response,boolean isDelete) {
    try {
        // 以流的形式下载文件。
        System.out.println("导出的路径:"+file.getPath());
        BufferedInputStream fis = new BufferedInputStream(new FileInputStream(file.getPath()));
        byte[] buffer = new byte[fis.available()];
        fis.read(buffer);
        fis.close();
        // 清空response
        response.reset();
        OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
        response.setContentType("application/octet-stream");
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(newNameTo, "UTF-8"));
        toClient.write(buffer);
        toClient.flush();
        toClient.close();
        if(isDelete){
            file.delete();        //是否将生成的服务器端文件删除
        }
    }
    catch (IOException ex) {
        ex.printStackTrace();
    }
}

  

 

posted @   qukaige  阅读(190)  评论(0编辑  收藏  举报
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