loser/EasyCaptcha
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增加内置字体、贝塞尔曲线、算术验证码、base64输出

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This commit is contained in:
whvcse@foxmail.com
2019-08-23 23:50:26 +08:00
parent 366f54ea80
commit 8ebe5918c9
12 changed files with 640 additions and 527 deletions
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105
src/main/java/com/wf/captcha/ChineseGifCaptcha.java
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@@ -4,6 +4,7 @@ import com.wf.captcha.base.ChineseCaptchaAbstract;
import com.wf.captcha.utils.GifEncoder;
import java.awt.*;
import java.awt.geom.CubicCurve2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
@@ -30,24 +31,39 @@ public class ChineseGifCaptcha extends ChineseCaptchaAbstract {
@Override
public boolean out(OutputStream os) {
checkAlpha();
boolean ok;
try {
char[] rands = textChar(); // 获取验证码数组
char[] strs = textChar(); // 获取验证码数组
// 随机生成每个文字的颜色
Color fontColor[] = new Color[len];
for (int i = 0; i < len; i++) {
fontColor[i] = color();
}
// 随机生成贝塞尔曲线参数
int x1 = 5, y1 = num(5, height / 2);
int x2 = width - 5, y2 = num(height / 2, height - 5);
int ctrlx = num(width / 4, width / 4 * 3), ctrly = num(5, height - 5);
if (num(2) == 0) {
int ty = y1;
y1 = y2;
y2 = ty;
}
int ctrlx1 = num(width / 4, width / 4 * 3), ctrly1 = num(5, height - 5);
int[][] besselXY = new int[][]{{x1, y1}, {ctrlx, ctrly}, {ctrlx1, ctrly1}, {x2, y2}};
// 开始画gif每一帧
GifEncoder gifEncoder = new GifEncoder();
gifEncoder.start(os);
gifEncoder.setQuality(180);
gifEncoder.setDelay(100);
gifEncoder.setRepeat(0);
BufferedImage frame;
Color fontcolor = color();
gifEncoder.start(os);
for (int i = 0; i < len; i++) {
frame = graphicsImage(fontcolor, rands, i);
BufferedImage frame = graphicsImage(fontColor, strs, i, besselXY);
gifEncoder.addFrame(frame);
frame.flush();
}
gifEncoder.finish();
ok = true;
return true;
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
os.close();
@@ -55,60 +71,53 @@ public class ChineseGifCaptcha extends ChineseCaptchaAbstract {
e.printStackTrace();
}
}
return ok;
return false;
}
@Override
public String toBase64() {
return toBase64("data:image/gif;base64,");
}
/**
* 画随机码图
*
* @param fontcolor 随机字体颜色
* @param fontColor 随机字体颜色
* @param strs 字符数组
* @param flag 透明度使用
* @param flag 透明度
* @param besselXY 干扰线参数
* @return BufferedImage
*/
private BufferedImage graphicsImage(Color fontcolor, char[] strs, int flag) {
private BufferedImage graphicsImage(Color[] fontColor, char[] strs, int flag, int[][] besselXY) {
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = (Graphics2D) image.getGraphics();
g2d.setColor(Color.WHITE); // 填充背景颜色
// 填充背景颜色
g2d.setColor(Color.WHITE);
g2d.fillRect(0, 0, width, height);
// 抗锯齿
AlphaComposite ac3;
g2d.setColor(fontcolor);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// 画验证码
Font font = getFont();
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 < len; i++) {
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(flag, i));
g2d.setComposite(ac3);
// 计算坐标
int x = i * w + sp + num(-3, 3);
int y = h + num(-3, 3);
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();
}
g2d.setFont(font.deriveFont(num(2) == 0 ? Font.PLAIN : Font.ITALIC));
g2d.drawString(String.valueOf(strs[i]), x, y);
}
// 随机画干扰线
g2d.setStroke(new BasicStroke(1.25f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.45f);
g2d.setComposite(ac3);
drawLine(1, g2d.getColor(), g2d);
// 画干扰圆圈
drawOval(3, g2d.getColor(), g2d);
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.1f * num(10))); // 设置透明度
drawOval(2, g2d);
// 画干扰线
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f)); // 设置透明度
g2d.setStroke(new BasicStroke(1.2f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
g2d.setColor(fontColor[0]);
CubicCurve2D shape = new CubicCurve2D.Double(besselXY[0][0], besselXY[0][1], besselXY[1][0], besselXY[1][1], besselXY[2][0], besselXY[2][1], besselXY[3][0], besselXY[3][1]);
g2d.draw(shape);
// 画验证码
g2d.setFont(getFont());
FontMetrics fontMetrics = g2d.getFontMetrics();
int fW = width / strs.length; // 每一个字符所占的宽度
int fSp = (fW - (int) fontMetrics.getStringBounds("W", g2d).getWidth()) / 2; // 字符的左右边距
for (int i = 0; i < strs.length; i++) {
// 设置透明度
AlphaComposite ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(flag, i));
g2d.setComposite(ac3);
g2d.setColor(fontColor[i]);
int fY = height - ((height - (int) fontMetrics.getStringBounds(String.valueOf(strs[i]), g2d).getHeight()) >> 1); // 文字的纵坐标
g2d.drawString(String.valueOf(strs[i]), i * fW + fSp - 3, fY - 3);
}
g2d.dispose();
return image;
}