1.服务端，java代码，用于将图片转为文件流返回给前端

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;import org.springframework.core.io.Resource;
import org.springframework.core.io.UrlResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
public class Demo {@GetMapping("/aaaaaa")public ResponseEntity<Resource> getImage(String imageName) throws Exception {// 构建图片的路径Path imagePath = Paths.get("D:\\1.png");// 检查文件是否存在if (!Files.exists(imagePath)) {throw new Exception("Image not found");}// 将图片文件转换为Resource对象，以便Spring管理Resource resource = ne