头像生成器代码如下：

package com.hua.util;import org.apache.commons.lang3.StringUtils;import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Random;
import java.util.UUID;/*** @author: zhengzhonghua* @date: 2023/3/16 13:23* @description: 头像生成器*/
public class HeadGeneration {/*** @author: zhengzhonghua* @date: 2023/3/16 13:24* @description: 头像生成* @param name 用户名称* @return 访问图片的路径 localhost:8082/img/*/public static String generateImg(String name) throws IOException {int nameLen = name.length();//定义最后在图片上显示的姓名String nameWritten;if (nameLen <= 2) {nameWritten = name;} else {//如果用户姓名大于三位,截取后两位nameWritten = StringUtils.right(name, 2);}String uuid = UUID.randomUUID().toString().replace("-","");//文件名(路径+uuid+.jpg)String fileName = Const.HEAD_IMAGE_URL + uuid+".jpg";File file = new File(fileName);//生成图片BufferedImage bi = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB);Graphics2D g2 = (Graphics2D) bi.getGraphics();g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);g2.setBackground(getRandomColor());g2.clearRect(0, 0, 100, 100);g2.setPaint(Color.WHITE);Font font = null;// 两个字及以上if (nameWritten.length() >= 2) {font = new Font("微软雅黑", Font.PLAIN, 30);g2.setFont(font);g2.drawString(nameWritten, 20, 60);}// 一个字if (nameWritten.length() == 1) {// 中文font = new Font("微软雅黑", Font.PLAIN, 50);g2.setFont(font);g2.drawString(nameWritten, 25, 70);}//图片做圆角处理BufferedImage rounded = makeRoundedCorner(bi, Const.HEAD_IMAGE_Radius);ImageIO.write(rounded, "png", file);return Const.serverUrl+uuid+".jpg";}/*** @author: zhengzhonghua* @date: 2023/3/16 13:32* @description: 生成随机颜色*/private static Color getRandomColor() {String[] beautifulColors = new String[]{"2,168,250"};int len = beautifulColors.length;Random random = new Random();String[] color = beautifulColors[random.nextInt(len)].split(",");return new Color(Integer.parseInt(color[0]), Integer.parseInt(color[1]), Integer.parseInt(color[2]));}/*** @author: zhengzhonghua* @date: 2023/3/16 13:39* @description: 图片做圆角处理*/public static BufferedImage makeRoundedCorner(BufferedImage image, int cornerRadius) {int w = image.getWidth();int h = image.getHeight();BufferedImage output = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);Graphics2D g2 = output.createGraphics();g2.setComposite(AlphaComposite.Src);g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);g2.setColor(Color.WHITE);g2.fill(new RoundRectangle2D.Float(0, 0, w, h, cornerRadius, cornerRadius));g2.setComposite(AlphaComposite.SrcAtop);g2.drawImage(image, 0, 0, null);g2.dispose();return output;}}