批量导出pdf为zip文件（可以修改zip中pdf名称）

核心代码

  public static void compressZip1(HashMap map, String rootPath, String zipFileName) throws FileNotFoundException {
        FileOutputStream fileOutputStream = new FileOutputStream(zipFileName);
        ZipOutputStream zipOutputStream = new ZipOutputStream(new FileOutputStream(rootPath));

        try {
            for (Map.Entry entry : map.entrySet()) {
                String fileName = entry.getKey(); // 获取文件名
                File file = entry.getValue(); // 获取文件

                FileInputStream fileInputStream = new FileInputStream(file);
                zip1(fileInputStream, zipOutputStream, fileName, file);
                fileInputStream.close();
            }

            zipOutputStream.close();
            fileOutputStream.close();
        } catch (IOException e) {
            log.error("context", e);
        }finally {
            try {
                zipOutputStream.close();
                fileOutputStream.close();
            } catch (IOException e) {
                log.error("context", e);
            }
        }
    }

    private static void zip1(FileInputStream fileInputStream,ZipOutputStream zipOutputStream,  String fileName, File file) throws IOException {
        // 设置自定义pdf文件名
        String newFileName = fileName + file.getName();
        ZipEntry zipEntry = new ZipEntry(newFileName);
        zipOutputStream.putNextEntry(zipEntry);

        byte[] buffer = new byte[1024*5];
        BufferedInputStream bufferStream  = new BufferedInputStream(fileInputStream);
        int length;
        // 输入缓冲流
            int read = 0;
//        while ((length = fileInputStream.read(buffer)) > 0) {
        while ((read = bufferStream.read(buffer)) != -1) {
            zipOutputStream.write(buffer, 0, read);
        }

        zipOutputStream.closeEntry();
        bufferStream.close();
    }

注意！！！

这里需要使用BufferedInputStream，如果用的是FileInputStream 就算flush有时候还是会文件损坏，我没再深点测试这个为啥得BufferedInputStream