java将base64编码字符串还原为字节数组

 /**     * 图片上传     * @param imgBase     * @return     */    @PostMapping("/upload")    public CommonResult upload(String imgBase){        byte[] b1 = null;        BASE64Decoder decoder = new BASE64Decoder();        try{            if (imgBase.indexOf("data:image/jpeg;base64,") != -1) {                b1 = decoder.decodeBuffer(imgBase.replaceAll("data:image/jpeg;base64,", ""));            } else {                if (imgBase.indexOf("data:image/png;base64,") != -1) {                    b1 = decoder.decodeBuffer(imgBase.replaceAll("data:image/png;base64,", ""));                } else {                    b1 = decoder.decodeBuffer(imgBase.replaceAll("data:image/jpg;base64,", ""));                }            }            for (int i = 0; i < b1.length; ++i) {                if (b1[i] < 0) {// 调整异常数据                    b1[i] += 256;                }            }        }catch(Exception e){            e.printStackTrace();        }        //添加图片url；        String name = UUID.randomUUID().toString().replace("_", "");        try {            String upload = new QiniuUploadUtil().upload(name, b1);            System.out.println("uploaduploadupload"+upload);            if(imgUrl==null){                imgUrl=new ArrayList<>();            }            imgUrl.add(upload);        } catch (Exception e) {            e.printStackTrace();        }        return CommonResult.success("1");    }}

原文地址：https://www.cnblogs.com/xiaofengshan/p/12584159.html