java 生成文字图片

时间:2023-02-04 17:29:06
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

public class FontImage {
public static void main(String[] args) throws Exception {
createImage("请A1003到3号窗口", new Font("宋体", Font.BOLD, 30), new File(
"e:/a.png"), 4096, 64);
createImage("请A1002到2号窗口", new Font("黑体", Font.BOLD, 35), new File(
"e:/a1.png"), 4096, 64);
createImage("请A1001到1号窗口", new Font("黑体", Font.PLAIN, 40), new File(
"e:/a2.png"), 4096, 64);
}

// 根据str,font的样式以及输出文件目录
public static void createImage(String str, Font font, File outFile,
Integer width, Integer height) throws Exception {
// 创建图片
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_BGR);
Graphics g = image.getGraphics();
g.setClip(0, 0, width, height);
g.setColor(Color.black);
g.fillRect(0, 0, width, height);// 先用黑色填充整张图片,也就是背景
g.setColor(Color.red);// 在换成黑色
g.setFont(font);// 设置画笔字体
/** 用于获得垂直居中y */
Rectangle clip = g.getClipBounds();
FontMetrics fm = g.getFontMetrics(font);
int ascent = fm.getAscent();
int descent = fm.getDescent();
int y = (clip.height - (ascent + descent)) / 2 + ascent;
for (int i = 0; i < 6; i++) {// 256 340 0 680
g.drawString(str, i * 680, y);// 画出字符串
}
g.dispose();
ImageIO.write(image, "png", outFile);// 输出png图片
}
}