Spring :如何在@RestController中返回base64图像

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.Base64;

@RestController
@RequestMapping("/image")
public class ImageController {

    @GetMapping
    public ResponseEntity<String> getImage() {
        try {
            // 加载图像文件
            BufferedImage image = ImageIO.read(new File("path/to/image.jpg"));

            // 将图像转换为base64编码的字符串
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(image, "jpg", baos);
            byte[] imageBytes = baos.toByteArray();
            String base64Image = Base64.getEncoder().encodeToString(imageBytes);

            // 构建响应实体并返回
            return ResponseEntity.ok()
                    .header("Content-Type", "text/plain")
                    .body(base64Image);
        } catch (IOException e) {
            // 处理异常情况
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Failed to load image.");
        }
    }
}