1.配置文件

bootstrap.yml
file:path:httpResURL: http://122.246.1.148:19086SAVE_PATH: /data/imagesresURI: /wzq/

2.文件工具类

import cn.hutool.core.io.FileUtil;
import com.vinsuan.park.platform.biz.FilePathConfig;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.multipart.MultipartFile;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;@Slf4j
@AllArgsConstructor
public class FileUtils {public static String upload(MultipartFile file, String pkno, String type, String plateNo) {LocalDateTime localDateTime = LocalDateTime.now();String yyyyMMdd = localDateTime.format(DateTimeFormatter.ofPattern("yyyyMMdd"));String HHmmss = localDateTime.format(DateTimeFormatter.ofPattern("HHmmss"));//文件名绑定后缀  pkno_type_plateNo_20191011_143600(车场-进出-车牌-年月日-时分秒)String md5File = pkno + "_" + type + "_" + plateNo + "_" + yyyyMMdd + "_" + HHmmss + ".jpg";File path = new File(FilePathConfig.savePath + FilePathConfig.resUri);if (!path.exists()) {path.mkdirs();}File localFile = new File(FilePathConfig.savePath + FilePathConfig.resUri, md5File);if (!FileUtil.exist(localFile)) {//创建一个新文件File attachFile = FileUtil.touch(FilePathConfig.savePath + FilePathConfig.resUri, md5File);//将文件流写入文件中try {FileUtil.writeFromStream(file.getInputStream(), attachFile);} catch (IOException e) {e.printStackTrace();}}return FilePathConfig.httpResUrl + FilePathConfig.resUri + md5File;}/*** 保存文件(此案例中未使用)*/public static File saveFileFromInputStream(InputStream stream, String path, String filename, byte[] buff)throws IOException {File file = new File(path);if (!file.exists()) {log.info("++++++++++++++创建文件++++++++++++++++++++++++++++：" + path);file.mkdirs();}FileOutputStream fs = new FileOutputStream(path + filename);byte[] buffer = new byte[1024 * 1024];int byteread = 0;if (null == buff || buff.length <= 0) {while ((byteread = stream.read(buffer)) != -1) {fs.write(buffer, 0, byteread);}} else {fs.write(buff);}fs.flush();fs.close();if (null != stream) {stream.close();}return file;}//    public static void main(String[] args) {
//        String imageStr = Base64Utils.GetImageStr("D:\\Pictures\\yy.jpg");
//        MultipartFile file = Base64ToMultipartFile.base64ToMultipart(imageStr);
//        String upload = FileUtils.upload(file, "cc8888", "1", "浙B88888");
//        System.out.println(upload);
//    }
}

3.图片转图片BASE64值
4.图片BASE64转MultipartFile
注意：
1.图片存储路径为当前项目盘\data\images\wzq
2.此文件工具栏返回的图片是路径是：http://122.246.1.148:19999/wzq/20191022114711.jpg，不是：http://122.246.1.148:19999/data/images/20191022114711.jpg，是因为访问路径有做映射。wzq->data/images