base64字符串转化为图片

Util工具类

public class Base64StrToImage {
    public  static MultipartFile base64MutipartFile(String imgStr){
        try {
            String [] baseStr = imgStr.split(",");
            BASE64Decoder base64Decoder = new BASE64Decoder();
            byte[] b =  new byte[0];
            b = base64Decoder.decodeBuffer(baseStr[1]);
            for(int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {
                    b[i] += 256;
                }
            }
            return  new BASE64DecodedMultipartFile(b,baseStr[0]) ;
        }catch (Exception e){
            e.printStackTrace();
            return null;
        }
    }
}

实现

BASE64DecodedMultipartFile base64DecodedMultipartFile = (BASE64DecodedMultipartFile) Base64StrToImage.base64MutipartFile(imgStr);