java 根据用户名生成头像。

先上效果图
在这里插入图片描述
自行根据需求修改代码

package com.space;
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.regex.Matcher;
import java.util.regex.Pattern;import javax.imageio.ImageIO;
/*** @author lingzhiying* @title: test.java* @projectName spacepm* @description:  * @date 2019年1月11日*/
public class test {public static void main(String[] args) throws IOException {String name = "新垣结衣";generateImg(name, name);}/*** 绘制字体头像* 如果是英文名，只显示首字母大写* 如果是中文名，只显示最后两个字* @param name* @param outputPath* @param outputName* @throws IOException*/public static void generateImg(String name, String outputName)throws IOException {int width = 100;int height = 100;int nameLen = name.length();String nameWritten;//如果用户输入的姓名少于等于2个字符，不用截取if (nameLen <= 2) {nameWritten = name;} else {//如果用户输入的姓名大于等于3个字符，截取后面一位  可根据需求改长度String first = name.substring(0, 1);if (isChinese(first)) {//截取倒数两位汉字nameWritten = name.substring(nameLen - 1);} else {//截取前面的两个英文字母nameWritten = name.substring(0, 2).toUpperCase();}}String filename = "E:/lzy" + File.separator + outputName + ".jpg";File file = new File(filename);//Font font = new Font("微软雅黑", Font.PLAIN, 30);BufferedImage bi = new BufferedImage(width, height, 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, width, height);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);String firstWritten = nameWritten.substring(0, 1);String secondWritten = nameWritten.substring(1, 2);//两个中文 如 言曌if (isChinese(firstWritten) && isChinese(secondWritten)) {g2.drawString(nameWritten, 20, 60);}//首中次英 如 罗Qelse if (isChinese(firstWritten) && !isChinese(secondWritten)) {g2.drawString(nameWritten, 27, 60);//首英,如 AB} else {nameWritten = nameWritten.substring(0,1);}}//一个字if(nameWritten.length() ==1) {//中文if(isChinese(nameWritten)) {font = new Font("微软雅黑", Font.PLAIN, 50);g2.setFont(font);g2.drawString(nameWritten, 25, 70);}//英文else {font = new Font("微软雅黑", Font.PLAIN, 55);g2.setFont(font);g2.drawString(nameWritten.toUpperCase(), 33, 67);}}BufferedImage rounded = makeRoundedCorner(bi, 99);ImageIO.write(rounded, "png", file);}/*** 判断字符串是否为中文* @param str* @return*/public static boolean isChinese(String str) {String regEx = "[\\u4e00-\\u9fa5]+";Pattern p = Pattern.compile(regEx);Matcher m = p.matcher(str);if (m.find())return true;elsereturn false;}/*** 获得随机颜色* @return*/private static Color getRandomColor() {String[] beautifulColors =new String[]{"232,221,203", "205,179,128", "3,101,100", "3,54,73", "3,22,52","237,222,139", "251,178,23", "96,143,159", "1,77,103", "254,67,101", "252,157,154","249,205,173", "200,200,169", "131,175,155", "229,187,129", "161,23,21", "34,8,7","118,77,57", "17,63,61", "60,79,57", "95,92,51", "179,214,110", "248,147,29","227,160,93", "178,190,126", "114,111,238", "56,13,49", "89,61,67", "250,218,141","3,38,58", "179,168,150", "222,125,44", "20,68,106", "130,57,53", "137,190,178","201,186,131", "222,211,140", "222,156,83", "23,44,60", "39,72,98", "153,80,84","217,104,49", "230,179,61", "174,221,129", "107,194,53", "6,128,67", "38,157,128","178,200,187", "69,137,148", "117,121,71", "114,83,52", "87,105,60", "82,75,46","171,92,37", "100,107,48", "98,65,24", "54,37,17", "137,157,192", "250,227,113","29,131,8", "220,87,18", "29,191,151", "35,235,185", "213,26,33", "160,191,124","101,147,74", "64,116,52", "255,150,128", "255,94,72", "38,188,213", "167,220,224","1,165,175", "179,214,110", "248,147,29", "230,155,3", "209,73,78", "62,188,202","224,160,158", "161,47,47", "0,90,171", "107,194,53", "174,221,129", "6,128,67","38,157,128", "201,138,131", "220,162,151", "137,157,192", "175,215,237", "92,167,186","255,66,93", "147,224,255", "247,68,97", "185,227,217"};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]));}/*** 图片做圆角处理* @param image* @param cornerRadius* @return*/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;}
}