生成zip文件,并下载

1. zip生成

 /**
     * @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

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

　　

调用

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

2. 下载zip文件

DownloadFile.downloadFile(downFile, fd_name, response, true);

    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();
        }
    }