loser/EasyCaptcha
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优化验证码的效果和干扰

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synchronized
2018-07-27 15:11:34 +08:00
parent a548f7af0b
commit 67409112a7
8 changed files with 204 additions and 128 deletions
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23
src/main/java/com/wf/captcha/GifCaptcha.java
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@@ -1,9 +1,6 @@
package com.wf.captcha;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
@@ -82,12 +79,26 @@ public class GifCaptcha extends Captcha {
int h = height - ((height - font.getSize()) >> 1);
int w = width / len;
g2d.setFont(font);
// 随机画干扰线
for (int i = 0; i < 8; i++) {
int x1 = num(-10, width - 10);
int y1 = num(5, height - 5);
int x2 = num(10, width + 10);
int y2 = num(2, height - 2);
g2d.setColor(color(150, 250));
g2d.setStroke(new BasicStroke(1.3f));
g2d.drawLine(x1, y1, x2, y2);
// 画干扰圆圈
g2d.setColor(color(100, 250));
g2d.setStroke(new BasicStroke(1.0f));
g2d.drawOval(num(width), num(height), 5 + num(10), 5 + num(10));
}
// 画验证码
for (int i = 0; i < len; i++) {
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(flag, i));
g2d.setComposite(ac3);
g2d.setColor(fontcolor[i]);
g2d.drawOval(num(width), num(height), 5 + num(10), 5 + num(10));
g2d.drawString(String.valueOf(strs[i]), (width - (len - i) * w) + (w - font.getSize()) + 1, h - 4);
g2d.drawString(String.valueOf(strs[i]), (width - (len - i) * w) + (w - font.getSize()) + num(7, 11), h - num(2, 6));
}
g2d.dispose();
return image;