优化验证码效果

pom.xml

@@ -5,7 +5,7 @@
     <groupId>com.github.whvcse</groupId>
 
     <artifactId>EasyCaptcha</artifactId>
-    <version>1.4.0-RELEASE</version>
+    <version>1.5.0-RELEASE</version>
     <packaging>jar</packaging>
 
     <name>EasyCaptcha</name>

src/main/java/com/wf/captcha/Captcha.java

@@ -1,7 +1,6 @@
 package com.wf.captcha;
 
-import java.awt.Color;
+import java.awt.*;
-import java.awt.Font;
 import java.io.OutputStream;
 
 /**
@@ -9,8 +8,8 @@ import java.io.OutputStream;
  * Created by 王帆 on 2018-07-27 上午 10:08.
  */
 public abstract class Captcha extends Randoms {
-    protected Font font = new Font("Arial", Font.PLAIN, 32); // 字体Verdana
+    protected Font font = new Font("Arial", Font.BOLD, 32); // 字体Verdana
-    protected int len = 5; // 验证码随机字符长度
+    protected int len = 4; // 验证码随机字符长度
     protected int width = 130; // 验证码显示宽度
     protected int height = 48; // 验证码显示高度
     protected String chars = null; // 当前验证码
@@ -18,6 +17,9 @@ public abstract class Captcha extends Randoms {
     public static final int TYPE_DEFAULT = 1;  // 字母数字混合
     public static final int TYPE_ONLY_NUMBER = 2;  // 纯数字
     public static final int TYPE_ONLY_CHAR = 3;  // 纯字母
+    public static final int TYPE_ONLY_UPPER = 4;  // 纯大写字母
+    public static final int TYPE_ONLY_LOWER = 5;  // 纯小写字母
+    public static final int TYPE_NUM_AND_UPPER = 6;  // 数字大写字母
     // 常用颜色
     public static final int[][] COLOR = {{0, 135, 255}, {51, 153, 51}, {255, 102, 102}, {255, 153, 0}, {153, 102, 0}, {153, 102, 153}, {51, 153, 153}, {102, 102, 255}, {0, 102, 204}, {204, 51, 51}, {0, 153, 204}, {0, 51, 102}};
 
@@ -36,6 +38,15 @@ public abstract class Captcha extends Randoms {
                 case 3:
                     cs[i] = alpha(charMinIndex, charMaxIndex);
                     break;
+                case 4:
+                    cs[i] = alpha(upperMinIndex, upperMaxIndex);
+                    break;
+                case 5:
+                    cs[i] = alpha(lowerMinIndex, lowerMaxIndex);
+                    break;
+                case 6:
+                    cs[i] = alpha(upperMaxIndex);
+                    break;
                 default:
                     cs[i] = alpha();
             }
@@ -109,6 +120,61 @@ public abstract class Captcha extends Randoms {
         }
     }
 
+    /**
+     * 随机画干扰线
+     *
+     * @param num 数量
+     * @param g   Graphics2D
+     */
+    public void drawLine(int num, Graphics2D g) {
+        drawLine(num, null, g);
+    }
+
+    /**
+     * 随机画干扰线
+     *
+     * @param num   数量
+     * @param color 颜色
+     * @param g     Graphics2D
+     */
+    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 - 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);
+        }
+    }
+
+    /**
+     * 随机画干扰圆
+     *
+     * @param num 数量
+     * @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));
+        }
+    }
+
+    /**
+     * 随机画干扰圆
+     *
+     * @param num   数量
+     * @param color 颜色
+     * @param g     Graphics2D
+     */
+    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));
+        }
+    }
+
     public Font getFont() {
         return font;
     }

src/main/java/com/wf/captcha/ChineseCaptcha.java

@@ -58,7 +58,6 @@ public class ChineseCaptcha extends ChineseCaptchaAbstract {
             g.fillRect(0, 0, width, height);
             // 抗锯齿
             g.setColor(color());
-            g.setFont(font);
             g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
             int hp = (height - font.getSize()) >> 1;
             int h = height - hp;
@@ -69,8 +68,8 @@ public class ChineseCaptcha extends ChineseCaptchaAbstract {
                 // 计算坐标
                 int x = i * w + sp + num(-5, 5);
                 int y = h + num(-5, 5);
-                if (x < 0) {
+                if (x < 5) {
-                    x = 0;
+                    x = 5;
                 }
                 if (x + font.getSize() > width) {
                     x = width - font.getSize();
@@ -81,21 +80,16 @@ public class ChineseCaptcha extends ChineseCaptchaAbstract {
                 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);
             }
             // 随机画干扰线
             g.setStroke(new BasicStroke(1.25f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
-            for (int i = 0; i < 6; i++) {
+            ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.7f);  // 指定透明度
-                ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.75f);  // 指定透明度
             g.setComposite(ac3);
-                int x1 = num(-10, width - 10);
+            drawLine(2, g.getColor(), g);
-                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.drawOval(num(width), num(height), 5 + num(25), 5 + num(25));
+            drawOval(5, g.getColor(), g);
-            }
             ImageIO.write(bi, "png", out);
             out.flush();
             ok = true;

src/main/java/com/wf/captcha/ChineseCaptchaAbstract.java

@@ -35,4 +35,16 @@ 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);
+        }
+    }
 }

src/main/java/com/wf/captcha/ChineseGifCaptcha.java

@@ -28,7 +28,7 @@ public class ChineseGifCaptcha extends ChineseCaptchaAbstract {
     @Override
     public boolean out(OutputStream os) {
         checkAlpha();
-        boolean ok = false;
+        boolean ok;
         try {
             char[] rands = textChar();  // 获取验证码数组
             GifEncoder gifEncoder = new GifEncoder();
@@ -71,7 +71,6 @@ public class ChineseGifCaptcha extends ChineseCaptchaAbstract {
         // 抗锯齿
         AlphaComposite ac3;
         g2d.setColor(fontcolor);
-        g2d.setFont(font);
         g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
         // 画验证码
         int hp = (height - font.getSize()) >> 1;
@@ -96,23 +95,16 @@ public class ChineseGifCaptcha extends ChineseCaptchaAbstract {
             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);
-        for (int i = 0; i < 4; i++) {
+        drawLine(1, g2d.getColor(), g2d);
-            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.drawLine(x1, y1, x2, y2);
-        }
         // 画干扰圆圈
-        for (int i = 0; i < 8; i++) {
+        drawOval(3, g2d.getColor(), g2d);
-            g2d.drawOval(num(width), num(height), 5 + num(50), 5 + num(50));
-        }
         g2d.dispose();
         return image;
     }

src/main/java/com/wf/captcha/GifCaptcha.java

@@ -32,7 +32,7 @@ public class GifCaptcha extends Captcha {
     @Override
     public boolean out(OutputStream os) {
         checkAlpha();
-        boolean ok = false;
+        boolean ok;
         try {
             char[] rands = textChar();  // 获取验证码数组
             GifEncoder gifEncoder = new GifEncoder();
@@ -77,35 +77,27 @@ public class GifCaptcha extends Captcha {
         g2d.setColor(Color.WHITE);
         g2d.fillRect(0, 0, width, height);
         // 抗锯齿
-        g2d.setFont(font);
         g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
-        // 随机画干扰线
+        g2d.setStroke(new BasicStroke(1.3f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
-        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.drawLine(x1, y1, x2, y2);
         // 画干扰圆圈
-            g2d.setColor(color(100, 250));
+        drawOval(4, g2d);
-            g2d.drawOval(num(width), num(height), 5 + num(25), 5 + num(25));
+        // 随机画干扰线
-        }
+        drawLine(2, g2d);
         // 画验证码
         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++) {
             AlphaComposite ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(flag, i));
             g2d.setComposite(ac3);
             g2d.setColor(fontcolor[i]);
             // 计算坐标
-            int x = i * w + num(6);
+            int x = i * w + sp + num(3);
-            int y = h - num(2, 8);
+            int y = h - num(3, 6);
-            if (x < 0) {
+            // 调整溢出的字
-                x = 0;
+            if (x < 8) {
+                x = 8;
             }
             if (x + font.getSize() > width) {
                 x = width - font.getSize();
@@ -116,6 +108,7 @@ public class GifCaptcha extends Captcha {
             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);
         }
         g2d.dispose();

src/main/java/com/wf/captcha/Randoms.java

@@ -15,6 +15,10 @@ public class Randoms {
     protected static final int numMaxIndex = 8;  // 数字的最大索引，不包括最大值
     protected static final int charMinIndex = numMaxIndex;  // 字符的最小索引，包括最小值
     protected static final int charMaxIndex = ALPHA.length;  // 字符的最大索引，不包括最大值
+    protected static final int upperMinIndex = charMinIndex;  // 大写字符最小索引
+    protected static final int upperMaxIndex = upperMinIndex + 23;  // 大写字符最大索引
+    protected static final int lowerMinIndex = upperMaxIndex;  // 小写字母最小索引
+    protected static final int lowerMaxIndex = charMaxIndex;  // 小写字母最大索引
 
     /**
      * 产生两个数之间的随机数

src/main/java/com/wf/captcha/SpecCaptcha.java

@@ -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++) {
+            drawLine(3, g);
-                g.setColor(color(150, 250));
+            // 随机画干扰圆
-                g.setStroke(new BasicStroke(1.1f + RANDOM.nextFloat() / 2, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
+            drawOval(8, g);
-                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
+            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 x = i * w + sp + num(3);
-                int y = h - num(9);
+                int y = h - num(3, 6);
-                if (x < 0) {
+                if (x < 8) {
-                    x = 0;
+                    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);

src/test/java/com/wf/captcha/CaptchaTest.java

@@ -13,37 +13,39 @@ public class CaptchaTest {
 
     @Test
     public void test() throws Exception {
-        for (int i = 0; i < 5; i++) {
+        /*for (int i = 0; i < 5; i++) {
             SpecCaptcha specCaptcha = new SpecCaptcha();
-            //specCaptcha.setCharType(Captcha.TYPE_ONLY_NUMBER);
+            specCaptcha.setCharType(Captcha.TYPE_ONLY_UPPER);
             System.out.println(specCaptcha.text());
-            //specCaptcha.out(new FileOutputStream(new File("D:/Java/aa" + i + ".png")));
+            specCaptcha.out(new FileOutputStream(new File("D:/Java/aa" + i + ".png")));
-        }
+        }*/
     }
 
     @Test
     public void testGIf() throws Exception {
-        for (int i = 0; i < 5; i++) {
+        /*for (int i = 0; i < 5; i++) {
             GifCaptcha gifCaptcha = new GifCaptcha();
             System.out.println(gifCaptcha.text());
-            //gifCaptcha.out(new FileOutputStream(new File("D:/Java/aa" + i + ".gif")));
+            gifCaptcha.out(new FileOutputStream(new File("D:/Java/aa" + i + ".gif")));
-        }
+        }*/
     }
 
     @Test
     public void testHan() throws Exception {
-        //  ChineseCaptcha chineseCaptcha = new ChineseCaptcha();
+        /*for (int i = 0; i < 5; i++) {
-        //chineseCaptcha.setFont(new Font("微软雅黑", Font.PLAIN, 25));
+            ChineseCaptcha chineseCaptcha = new ChineseCaptcha();
-        // System.out.println(chineseCaptcha.text());
+            System.out.println(chineseCaptcha.text());
-        //chineseCaptcha.out(new FileOutputStream(new File("D:/Java/aa.png")));
+            chineseCaptcha.out(new FileOutputStream(new File("D:/Java/aa" + i + ".png")));
+        }*/
     }
 
     @Test
     public void testGifHan() throws Exception {
-        // ChineseGifCaptcha chineseGifCaptcha = new ChineseGifCaptcha();
+        /*for (int i = 0; i < 5; i++) {
-        //chineseGifCaptcha.setFont(new Font("微软雅黑", Font.PLAIN, 30));
+            ChineseGifCaptcha chineseGifCaptcha = new ChineseGifCaptcha();
-        // System.out.println(chineseGifCaptcha.text());
+            System.out.println(chineseGifCaptcha.text());
-        //chineseGifCaptcha.out(new FileOutputStream(new File("D:/Java/aa.gif")));
+            chineseGifCaptcha.out(new FileOutputStream(new File("D:/Java/aa" + i + ".gif")));
+        }*/
     }
 
 }