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增加中文验证码功能

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synchronized
2018-07-28 10:26:10 +08:00
parent bd976c7d25
commit c168c09fc9
9 changed files with 141 additions and 66 deletions
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42
src/main/java/com/wf/captcha/GifCaptcha.java
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@@ -73,32 +73,50 @@ public class GifCaptcha extends Captcha {
private BufferedImage graphicsImage(Color[] fontcolor, char[] strs, int flag) {
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);
AlphaComposite ac3;
int h = height - ((height - font.getSize()) >> 1);
int w = width / len;
// 抗锯齿
g2d.setFont(font);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// 随机画干扰线
for (int i = 0; i < 8; i++) {
for (int i = 0; i < num(5, 12); i++) {
g2d.setStroke(new BasicStroke(1.1f + RANDOM.nextFloat() / 2, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
g2d.setColor(color(150, 250));
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));
g2d.drawOval(num(width), num(height), 5 + num(25), 5 + num(25));
}
// 画验证码
for (int i = 0; i < len; i++) {
ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(flag, i));
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++) {
AlphaComposite ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(flag, i));
g2d.setComposite(ac3);
g2d.setColor(fontcolor[i]);
g2d.drawString(String.valueOf(strs[i]), (width - (len - i) * w) + (w - font.getSize()) + num(7, 11), h - num(2, 6));
// 计算坐标
int x = i * w + sp + num(-3, 3);
int y = h + num(-6, 0);
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.drawString(String.valueOf(strs[i]), x, y);
}
g2d.dispose();
return image;