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优化验证码效果

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This commit is contained in:
whvcse@foxmail.com
2018-08-09 15:50:40 +08:00
parent 7defc7e727
commit 27af06eff5
9 changed files with 139 additions and 85 deletions
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31
src/main/java/com/wf/captcha/SpecCaptcha.java
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@@ -14,7 +14,6 @@ import javax.imageio.ImageIO;
public class SpecCaptcha extends Captcha {
public SpecCaptcha() {
setFont(new Font(font.getFontName(), Font.ITALIC, font.getSize()));
}
public SpecCaptcha(int width, int height) {
@@ -60,35 +59,26 @@ public class SpecCaptcha extends Captcha {
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);
g.setStroke(new BasicStroke(1.3f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
// 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));
}
drawLine(3, g);
// 随机画干扰圆
drawOval(8, g);
// 画字符串
AlphaComposite ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.75f);// 指定透明度
AlphaComposite ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.8f);// 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;
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;
int x = i * w + sp + num(3);
int y = h - num(3, 6);
if (x < 8) {
x = 8;
}
if (x + font.getSize() > width) {
x = width - font.getSize();
@@ -99,6 +89,7 @@ public class SpecCaptcha extends Captcha {
if (y - font.getSize() < 0) {
y = font.getSize();
}
g.setFont(font.deriveFont(num(2) == 0 ? Font.PLAIN : Font.ITALIC));
g.drawString(String.valueOf(strs[i]), x, y);
}
ImageIO.write(bi, "png", out);