spring mvc imageIO add text to image

PicGenController.java

package com.cc.imageio.controller;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * 
 * @author yuki
 *
 */
@RestController
public class PicGenController {

    private static File file = new File(PicGenController.class.getResource("/test.jpg").getFile());
    private static Image image = null;

    static {
        try {
            image = ImageIO.read(file);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @GetMapping(value = "/genpic", produces = MediaType.IMAGE_JPEG_VALUE)
    public byte[] genPic(@RequestParam("text") String text) throws IOException {
        int x = 200;
        int y = 200;
        int fontSize = 30;
        int width = image.getWidth(null);
        int height = image.getHeight(null);
        BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics2D g = bufferedImage.createGraphics();
        g.drawImage(image, 0, 0, width, height, null);
        g.setFont(new Font("隶书", Font.BOLD, fontSize));
        g.setColor(Color.red);
        g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.9f));
        g.drawString(text, x, y);
        g.dispose();

        ByteArrayOutputStream os = new ByteArrayOutputStream();
        ImageIO.write(bufferedImage, "jpeg", os);

        // GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        // String[] fontFamilies = ge.getAvailableFontFamilyNames();
        // for (String s : fontFamilies) {
        // System.out.println(s);
        // }
        return os.toByteArray();
    }

}