自动生成带昵称的头像（仿照钉钉头像）
很多场合都会出现默认头像，比如刚注册的账户还未自定义头像，显示就是默认头像，这种头像一般都很丑，想到钉钉那种风格还挺特别的，仿照写一个。
废话不多说，直接上代码。
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;
/**
* 根据姓名创建图片
*/
public class CreateNamePicture {
/**
* @throws IOException
* @throws
**/
public static void main(String[] args) throws IOException {
String name = "张三";
generateImg(name, "/Users/xingchenge/Desktop/temp", 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 outputPath, 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，截取后面两位
String first = name.substring(0, 1);
if (isChinese(first)) {
// 截取倒数两位汉字
nameWritten = name.substring(nameLen - 2);
} else {
// 截取前面的两个英文字母
nameWritten = name.substring(0, 2).toUpperCase();
}
}
String filename = outputPath + 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 张三
if (isChinese(firstWritten) && isChinese(secondWritten)) {
g2.drawString(nameWritten, 20, 60);
}
// 首中次英 如 张S
else if (isChinese(firstWritten) && !isChinese(secondWritten)) {
g2.drawString(nameWritten, 27, 60);
}
// 首英,如 ZS
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;
else
return 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;
}
}