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ImageUtil.java
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97 lines (91 loc) · 2.61 KB
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package smsVerCode;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;
import javax.imageio.ImageIO;
/*
* 步骤：
* 1.画框
* 2.画背景
* 3.画字符
* 4.画干扰线
*/
public final class ImageUtil {
// 验证码字符集
private static final char[] chars={
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'
};
// 字符数量
private static final int SIZE=4;
//干扰线数量
private static final int LINES=4;
// 宽度
private static final int WIDTH = 80;
// 高度
private static final int HEIGHT = 40;
// 字体大小
private static final int FONT_SIZE = 30;
/**
* 生成随机验证码及图片
* Object[0]验证码字符串String
* Object[1]验证码图片 BufferedImage
*/
public static Object[] createImage(){
StringBuffer sb=new StringBuffer();
//1、创建空白图片
BufferedImage image=new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
//2、获取图片画笔
Graphics graphics=image.getGraphics();
//3、设置画笔颜色
graphics.setColor(Color.LIGHT_GRAY);
//4、绘制矩形背景
graphics.fillRect(0, 0, WIDTH, HEIGHT);
//画随机字符
Random ran=new Random();
for (int i = 0; i < SIZE; i++) {
// 取随机字符索引
int n=ran.nextInt(chars.length-i);
//设置随机字符颜色
graphics.setColor(getRandomColor());
//设置字体大小
graphics.setFont(new Font(
null, Font.BOLD + Font.ITALIC, FONT_SIZE));
//画字符
graphics.drawString(chars[n]+"", i*10*WIDTH/HEIGHT , HEIGHT/2-i);
//记录字符
sb.append(chars[n]);
}
//画干扰线
for (int i = 0; i < LINES; i++) {
//设置随机颜色
graphics.setColor(getRandomColor());
//随机画线
graphics.drawLine(ran.nextInt(WIDTH), ran.nextInt(HEIGHT), ran.nextInt(WIDTH), ran.nextInt(HEIGHT));
}
//7、返回验证码和图片
return new Object[]{sb.toString(),image};
}
public static Color getRandomColor(){
Random ran=new Random();
Color color = new Color(ran.nextInt(256),
ran.nextInt(256), ran.nextInt(256));
return color;
}
public static void main(String[] args) throws IOException {
Object[] objs=createImage();
BufferedImage image=(BufferedImage) objs[1];
//图片格式可以自定义，java对png图片显示更清楚，输出路径可自定义
OutputStream os=new FileOutputStream("D:/xx.png");
//注意图片格式与创建格式匹配
ImageIO.write(image, "png", os);
os.close();
}
}