Base64与文件流之间的相互转换

 /**
     * 文件流转换成Base4
     */
    public String fileToBase64(String path){
        String base64 = null;
        InputStream in = null;
        try {
            File file = new File(path);
            in = new FileInputStream(file);
            byte[] bytes=new byte[(int)file.length()];
            in.read(bytes);
            base64 = Base64.getEncoder().encodeToString(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            if(in!=null){
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return base64;
    }

  /**
     * Base64解码成File文件
     */
    public static void base64ToFile(String base64,String fileName){
        File file = null;
        //创建文件目录
        String filePath = "C:\\Users\\hemanman6\\Desktop";
        File dir = new File(filePath);
        if(!dir.exists()&& !dir.isDirectory()){
            dir.mkdirs();
        }
        BufferedOutputStream bos = null;
        FileOutputStream fos = null;
        byte[] bytes = Base64.getDecoder().decode(base64);
        file = new File(filePath+"\\"+fileName);
        try {
            fos = new FileOutputStream(file);
            bos = new BufferedOutputStream(fos);
            bos.write(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        } finally{
            if(bos!=null){
                try {
                    bos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(fos!=null){
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }