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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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55
src/main/java/com/wf/captcha/base/ArithmeticCaptchaAbstract.java Normal file
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@@ -0,0 +1,55 @@
package com.wf.captcha.base;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
public abstract class ArithmeticCaptchaAbstract extends Captcha {
private String arithmeticString; // 计算公式
public ArithmeticCaptchaAbstract() {
setLen(2);
}
/**
* 生成随机验证码
*
* @return 验证码字符数组
*/
@Override
protected char[] alphas() {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < len; i++) {
sb.append(num(10));
if (i < len - 1) {
int type = num(1, 4);
if (type == 1) {
sb.append("+");
} else if (type == 2) {
sb.append("-");
} else if (type == 3) {
sb.append("x");
}
}
}
ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("javascript");
try {
chars = String.valueOf(engine.eval(sb.toString().replaceAll("x", "*")));
} catch (ScriptException e) {
e.printStackTrace();
}
sb.append("=?");
arithmeticString = sb.toString();
return chars.toCharArray();
}
public String getArithmeticString() {
checkAlpha();
return arithmeticString;
}
public void setArithmeticString(String arithmeticString) {
this.arithmeticString = arithmeticString;
}
}

52
src/main/java/com/wf/captcha/base/Captcha.java
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@@ -1,8 +1,11 @@
package com.wf.captcha.base;
import sun.misc.BASE64Encoder;
import java.awt.*;
import java.awt.geom.CubicCurve2D;
import java.awt.geom.QuadCurve2D;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
@@ -108,6 +111,20 @@ public abstract class Captcha extends Randoms {
*/
public abstract boolean out(OutputStream os);
public abstract String toBase64();
/**
* 输出base64编码
*
* @param type 编码头
* @return
*/
public String toBase64(String type) {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
out(outputStream);
return type + new BASE64Encoder().encode(outputStream.toByteArray());
}
/**
* 获取当前的验证码
*
@@ -156,7 +173,7 @@ public abstract class Captcha extends Randoms {
*/
public void drawLine(int num, Color color, Graphics2D g) {
for (int i = 0; i < num; i++) {
g.setColor(color == null ? color(150, 250) : color);
g.setColor(color == null ? color() : color);
int x1 = num(-10, width - 10);
int y1 = num(5, height - 5);
int x2 = num(10, width + 10);
@@ -172,10 +189,7 @@ public abstract class Captcha extends Randoms {
* @param g Graphics2D
*/
public void drawOval(int num, Graphics2D g) {
for (int i = 0; i < num; i++) {
g.setColor(color(100, 250));
g.drawOval(num(width), num(height), 10 + num(20), 10 + num(20));
}
drawOval(num, null, g);
}
/**
@@ -187,8 +201,9 @@ public abstract class Captcha extends Randoms {
*/
public void drawOval(int num, Color color, Graphics2D g) {
for (int i = 0; i < num; i++) {
g.setColor(color == null ? color(100, 250) : color);
g.drawOval(num(width), num(height), 10 + num(20), 10 + num(20));
g.setColor(color == null ? color() : color);
int w = 5 + num(10);
g.drawOval(num(width - 25), num(height - 15), w, w);
}
}
@@ -212,19 +227,20 @@ public abstract class Captcha extends Randoms {
public void drawBesselLine(int num, Color color, Graphics2D g) {
for (int i = 0; i < num; i++) {
g.setColor(color == null ? color() : color);
int x1 = 5;
int y1 = num(5, height - 5);
int x2 = width - 5;
int y2 = num(5, height - 5);
int ctrlx = num(5, width - 5);
int ctrly = num(5, height - 5);
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;
}
if (num(2) == 0) { // 二阶贝塞尔曲线
QuadCurve2D shape = new QuadCurve2D.Double();
shape.setCurve(x1, y1, ctrlx, ctrly, x2, y2);
g.draw(shape);
} else { // 三阶贝塞尔曲线
int ctrlx1 = num(5, width - 5);
int ctrly1 = num(5, height - 5);
int ctrlx1 = num(width / 4, width / 4 * 3), ctrly1 = num(5, height - 5);
CubicCurve2D shape = new CubicCurve2D.Double(x1, y1, ctrlx, ctrly, ctrlx1, ctrly1, x2, y2);
g.draw(shape);
}
@@ -247,7 +263,11 @@ public abstract class Captcha extends Randoms {
}
public void setFont(int font) throws IOException, FontFormatException {
setFont(font, Font.BOLD, 32f);
setFont(font, 32f);
}
public void setFont(int font, float size) throws IOException, FontFormatException {
setFont(font, Font.BOLD, size);
}
public void setFont(int font, int style, float size) throws IOException, FontFormatException {

14
src/main/java/com/wf/captcha/base/ChineseCaptchaAbstract.java
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@@ -1,7 +1,5 @@
package com.wf.captcha.base;
import com.wf.captcha.base.Captcha;
import java.awt.*;
public abstract class ChineseCaptchaAbstract extends Captcha {
@@ -37,16 +35,4 @@ public abstract class ChineseCaptchaAbstract extends Captcha {
return DELTA.charAt(num(DELTA.length()));
}
@Override
public void drawLine(int num, Color color, Graphics2D g) {
for (int i = 0; i < num; i++) {
g.setColor(color == null ? color(150, 250) : color);
int x1 = num(-10, width / 3);
int y1 = num(5, height - 5);
int x2 = num(width / 3 * 2, width + 10);
int y2 = num(2, height - 2);
g.drawLine(x1, y1, x2, y2);
}
}
}