图片 Base64码 转换

import sun.misc.BASE64Decoder;

    private String getBase64Picture(String imgBase64Str) {
        FileOutputStream fos = null;
        String uuid = UUID.randomUUID().toString();

        String staticPath = "d:/upsoft/test/img/";
        String relativePath = "/test/img/";

        File cutImgFile = new File(staticPath);
        if (!cutImgFile.exists()) {
            cutImgFile.mkdirs();
        }
        String picturePath = staticPath + uuid + ".jpg";
        try {
            byte[] fileDat = ImageStr2Bytes(imgBase64Str);
            File file = new File(picturePath);
            fos = new FileOutputStream(file);
            fos.write(fileDat);
            fos.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
        return relativePath + uuid + ".jpg";
    }

    public byte[] ImageStr2Bytes(String imgStr) {
        BASE64Decoder decoder = new BASE64Decoder();
        try {
            byte[] b = decoder.decodeBuffer(imgStr);
            return b;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }