将 base64 转为 输入流
//base64字符串 String file = "XXXXXXXXXX"; //将字符串转换为byte数组 byte[] bytes = new BASE64Decoder().decodeBuffer(file.trim()); //转化为输入流 ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
ps:要注意向后台传base64字符串时,要去掉 data:image/jpeg;base64, 前缀