119 lines
3.6 KiB
Java
119 lines
3.6 KiB
Java
package com.wf.captcha;
|
|
|
|
import java.awt.*;
|
|
import java.awt.image.BufferedImage;
|
|
import java.io.IOException;
|
|
import java.io.OutputStream;
|
|
|
|
import javax.imageio.ImageIO;
|
|
|
|
/**
|
|
* png格式验证码
|
|
* Created by 王帆 on 2018-07-27 上午 10:08.
|
|
*/
|
|
public class SpecCaptcha extends Captcha {
|
|
|
|
public SpecCaptcha() {
|
|
setFont(new Font(font.getFontName(), Font.ITALIC, font.getSize()));
|
|
}
|
|
|
|
public SpecCaptcha(int width, int height) {
|
|
this();
|
|
setWidth(width);
|
|
setHeight(height);
|
|
}
|
|
|
|
public SpecCaptcha(int width, int height, int len) {
|
|
this(width, height);
|
|
setLen(len);
|
|
}
|
|
|
|
public SpecCaptcha(int width, int height, int len, Font font) {
|
|
this(width, height, len);
|
|
setFont(font);
|
|
}
|
|
|
|
/**
|
|
* 生成验证码
|
|
*
|
|
* @param out 输出流
|
|
* @return 是否成功
|
|
*/
|
|
@Override
|
|
public boolean out(OutputStream out) {
|
|
checkAlpha();
|
|
return graphicsImage(textChar(), out);
|
|
}
|
|
|
|
/**
|
|
* 生成验证码图形
|
|
*
|
|
* @param strs 验证码
|
|
* @param out 输出流
|
|
* @return boolean
|
|
*/
|
|
private boolean graphicsImage(char[] strs, OutputStream out) {
|
|
boolean ok;
|
|
try {
|
|
BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
|
|
Graphics2D g = (Graphics2D) bi.getGraphics();
|
|
g.setColor(Color.WHITE);
|
|
g.fillRect(0, 0, width, height);
|
|
// 抗锯齿
|
|
g.setFont(font);
|
|
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
|
|
// 随机画干扰线
|
|
for (int i = 0; i < 12; i++) {
|
|
g.setColor(color(150, 250));
|
|
g.setStroke(new BasicStroke(1.1f + RANDOM.nextFloat() / 2, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
|
|
int x1 = num(-10, width - 10);
|
|
int y1 = num(5, height - 5);
|
|
int x2 = num(10, width + 10);
|
|
int y2 = num(2, height - 2);
|
|
g.drawLine(x1, y1, x2, y2);
|
|
// 画干扰圆圈
|
|
g.setColor(color(100, 250));
|
|
g.drawOval(num(width), num(height), 5 + num(25), 5 + num(25));
|
|
}
|
|
// 画字符串
|
|
AlphaComposite ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.75f);// 指定透明度
|
|
g.setComposite(ac3);
|
|
int hp = (height - font.getSize()) >> 1;
|
|
int h = height - hp;
|
|
int w = width / strs.length;
|
|
//int sp = (w - font.getSize()) / 2;
|
|
for (int i = 0; i < strs.length; i++) {
|
|
g.setColor(new Color(20 + num(110), 20 + num(110), 20 + num(110)));
|
|
// 计算坐标
|
|
int x = i * w + num(10);
|
|
int y = h - num(9);
|
|
if (x < 0) {
|
|
x = 0;
|
|
}
|
|
if (x + font.getSize() > width) {
|
|
x = width - font.getSize();
|
|
}
|
|
if (y > height) {
|
|
y = height;
|
|
}
|
|
if (y - font.getSize() < 0) {
|
|
y = font.getSize();
|
|
}
|
|
g.drawString(String.valueOf(strs[i]), x, y);
|
|
}
|
|
ImageIO.write(bi, "png", out);
|
|
out.flush();
|
|
ok = true;
|
|
} catch (IOException e) {
|
|
ok = false;
|
|
e.printStackTrace();
|
|
} finally {
|
|
try {
|
|
out.close();
|
|
} catch (IOException e) {
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
return ok;
|
|
}
|
|
} |