base图片上传

图片转base字符串网站：

// 前缀，比如data:image/jpeg;base,
String prefix = imgBase.substring(0, imgBase.indexOf(",") + 1);
// 替换前缀为空
imgBase = imgBase.replace(prefix, "");

byte[] bytes = new BASEDecoder().decodeBuffer(imgBase);
InputStream inputStream = new ByteArrayInputStream(bytes);

//处理inputStream
......