base64转PDF

public static void base64StringToPdf(String base64Content,String filePath){
        BufferedInputStream bis = null;
        FileOutputStream fos = null;
        BufferedOutputStream bos = null;

        try {
            byte[] bytes = Base64.decode(base64Content, Base64.DEFAULT);//base64编码内容转换为字节数组
            ByteArrayInputStream byteInputStream = new ByteArrayInputStream(bytes);
            bis = new BufferedInputStream(byteInputStream);
            File file = new File(filePath);
            File path = file.getParentFile();
            if(!path.exists()){
                path.mkdirs();
            }
            fos = new FileOutputStream(file);
            bos = new BufferedOutputStream(fos);

            byte[] buffer = new byte[1024];
            int length = bis.read(buffer);
            while(length != -1){
                bos.write(buffer, 0, length);
                length = bis.read(buffer);
            }
            bos.flush();
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            try {
                if (bis != null){
                    bis.close();
                }
                if (fos != null){
                    fos.close();
                }
                if (bos != null){
                    bos.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }