优化验证码效果

README.md

@@ -140,7 +140,7 @@ public class LoginController {
     @PostMapping("/login")
     public JsonResult login(String username,String password,String code){
         
-        if (CaptchaUtil.ver(code, request)) {
+        if (!CaptchaUtil.ver(code, request)) {
             CaptchaUtil.clear(request);
             return JsonResult.error("验证码不正确");
         }

pom.xml

@@ -5,7 +5,7 @@
     <groupId>com.github.whvcse</groupId>
 
     <artifactId>EasyCaptcha</artifactId>
-    <version>1.3.0-RELEASE</version>
+    <version>1.3.1-RELEASE</version>
     <packaging>jar</packaging>
 
     <name>EasyCaptcha</name>

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

@@ -9,7 +9,7 @@ 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("Verdana", Font.PLAIN, 32); // 字体
+    protected Font font = new Font("Arial", Font.PLAIN, 32); // 字体Verdana
     protected int len = 5; // 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
@@ -17,11 +17,10 @@ public abstract class Captcha extends Randoms {
     protected int charType = TYPE_DEFAULT;  // 验证码类型，1字母数字混合，2纯数字，3纯字母
     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    // 常用颜色
+    public static final int TYPE_ONLY_CHAR = 3;  // 纯字母
     // 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}};
 
-
     /**
      * 生成随机验证码
      *

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

@@ -67,8 +67,8 @@ public class ChineseCaptcha extends ChineseCaptchaAbstract {
             // 画字符串
             for (int i = 0; i < len; i++) {
                 // 计算坐标
-                int x = i * w + sp + num(-Math.abs(sp), Math.abs(sp));
+                int x = i * w + sp + num(-5, 5);
-                int y = h + num(-Math.abs(hp), Math.abs(hp));
+                int y = h + num(-5, 5);
                 if (x < 0) {
                     x = 0;
                 }

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

@@ -68,8 +68,8 @@ public class ChineseGifCaptcha extends ChineseCaptchaAbstract {
         Graphics2D g2d = (Graphics2D) image.getGraphics();
         g2d.setColor(Color.WHITE);  // 填充背景颜色
         g2d.fillRect(0, 0, width, height);
-        AlphaComposite ac3;
         // 抗锯齿
+        AlphaComposite ac3;
         g2d.setColor(fontcolor);
         g2d.setFont(font);
         g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
@@ -82,7 +82,7 @@ public class ChineseGifCaptcha extends ChineseCaptchaAbstract {
             ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getAlpha(flag, i));
             g2d.setComposite(ac3);
             // 计算坐标
-            int x = i * w + sp + num(-Math.abs(sp), Math.abs(sp));
+            int x = i * w + sp + num(-3, 3);
             int y = h + num(-3, 3);
             if (x < 0) {
                 x = 0;
@@ -99,17 +99,19 @@ public class ChineseGifCaptcha extends ChineseCaptchaAbstract {
             g2d.drawString(String.valueOf(strs[i]), x, y);
         }
         // 随机画干扰线
-        g2d.setStroke(new BasicStroke(1.2f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
+        g2d.setStroke(new BasicStroke(1.25f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
-        for (int i = 0; i < 4; i++) {
+        ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.45f);
-            ac3 = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.55f);
         g2d.setComposite(ac3);
+        for (int i = 0; i < 4; i++) {
             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.drawOval(num(width), num(height), 5 + num(10), 5 + num(10));
+        for (int i = 0; i < 8; i++) {
+            g2d.drawOval(num(width), num(height), 5 + num(50), 5 + num(50));
         }
         g2d.dispose();
         return image;
@@ -124,7 +126,8 @@ public class ChineseGifCaptcha extends ChineseCaptchaAbstract {
      */
     private float getAlpha(int i, int j) {
         int num = i + j;
-        float r = (float) 1 / len, s = (len + 1) * r;
+        float r = (float) 1 / (len - 1);
-        return num > len ? (num * r - s) : num * r;
+        float s = len * r;
+        return num >= len ? (num * r - s) : num * r;
     }
 }

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

@@ -96,14 +96,14 @@ public class GifCaptcha extends Captcha {
         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 + sp + num(-3, 3);
+            int x = i * w + num(6);
-            int y = h + num(-6, 0);
+            int y = h - num(2, 8);
             if (x < 0) {
                 x = 0;
             }
@@ -131,8 +131,9 @@ public class GifCaptcha extends Captcha {
      */
     private float getAlpha(int i, int j) {
         int num = i + j;
-        float r = (float) 1 / len, s = (len + 1) * r;
+        float r = (float) 1 / (len - 1);
-        return num > len ? (num * r - s) : num * r;
+        float s = len * r;
+        return num >= len ? (num * r - s) : num * r;
     }
 
 }

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

@@ -81,12 +81,12 @@ public class SpecCaptcha extends Captcha {
             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 + sp + num(-Math.abs(sp), Math.abs(sp));
+                int x = i * w + num(10);
-                int y = h + num(-Math.abs(hp), Math.abs(hp));
+                int y = h - num(9);
                 if (x < 0) {
                     x = 0;
                 }
@@ -99,7 +99,6 @@ public class SpecCaptcha extends Captcha {
                 if (y - font.getSize() < 0) {
                     y = font.getSize();
                 }
-                System.out.println(x + "--" + y);
                 g.drawString(String.valueOf(strs[i]), x, y);
             }
             ImageIO.write(bi, "png", out);

src/main/java/com/wf/captcha/utils/CaptchaUtil.java

@@ -1,5 +1,6 @@
 package com.wf.captcha.utils;
 
+import java.awt.*;
 import java.io.IOException;
 
 import javax.servlet.http.HttpServletRequest;
@@ -7,6 +8,7 @@ import javax.servlet.http.HttpServletResponse;
 
 import com.wf.captcha.Captcha;
 import com.wf.captcha.GifCaptcha;
+import com.wf.captcha.SpecCaptcha;
 
 /**
  * 图形验证码工具类
@@ -55,6 +57,20 @@ public class CaptchaUtil {
         out(130, 48, len, request, response);
     }
 
+    /**
+     * 输出验证码
+     *
+     * @param len      长度
+     * @param font     字体
+     * @param request  HttpServletRequest
+     * @param response HttpServletResponse
+     * @throws IOException IO异常
+     */
+    public static void out(int len, Font font, HttpServletRequest request, HttpServletResponse response)
+            throws IOException {
+        out(130, 48, len, font, request, response);
+    }
+
     /**
      * 输出验证码
      *
@@ -67,8 +83,119 @@ public class CaptchaUtil {
      */
     public static void out(int width, int height, int len, HttpServletRequest request, HttpServletResponse response)
             throws IOException {
+        out(width, height, len, null, request, response);
+    }
+
+    /**
+     * 输出验证码
+     *
+     * @param width    宽度
+     * @param height   高度
+     * @param len      长度
+     * @param font     字体
+     * @param request  HttpServletRequest
+     * @param response HttpServletResponse
+     * @throws IOException IO异常
+     */
+    public static void out(int width, int height, int len, Font font, HttpServletRequest request, HttpServletResponse response)
+            throws IOException {
+        outCaptcha(width, height, len, font, 1, request, response);
+    }
+
+    /**
+     * 输出验证码
+     *
+     * @param request  HttpServletRequest
+     * @param response HttpServletResponse
+     * @throws IOException IO异常
+     */
+    public static void outPng(HttpServletRequest request, HttpServletResponse response)
+            throws IOException {
+        outPng(5, request, response);
+    }
+
+    /**
+     * 输出验证码
+     *
+     * @param len      长度
+     * @param request  HttpServletRequest
+     * @param response HttpServletResponse
+     * @throws IOException IO异常
+     */
+    public static void outPng(int len, HttpServletRequest request, HttpServletResponse response)
+            throws IOException {
+        outPng(130, 48, len, request, response);
+    }
+
+    /**
+     * 输出验证码
+     *
+     * @param len      长度
+     * @param font     字体
+     * @param request  HttpServletRequest
+     * @param response HttpServletResponse
+     * @throws IOException IO异常
+     */
+    public static void outPng(int len, Font font, HttpServletRequest request, HttpServletResponse response)
+            throws IOException {
+        outPng(130, 48, len, font, request, response);
+    }
+
+    /**
+     * 输出验证码
+     *
+     * @param width    宽度
+     * @param height   高度
+     * @param len      长度
+     * @param request  HttpServletRequest
+     * @param response HttpServletResponse
+     * @throws IOException IO异常
+     */
+    public static void outPng(int width, int height, int len, HttpServletRequest request, HttpServletResponse response)
+            throws IOException {
+        outPng(width, height, len, null, request, response);
+    }
+
+    /**
+     * 输出验证码
+     *
+     * @param width    宽度
+     * @param height   高度
+     * @param len      长度
+     * @param font     字体
+     * @param request  HttpServletRequest
+     * @param response HttpServletResponse
+     * @throws IOException IO异常
+     */
+    public static void outPng(int width, int height, int len, Font font, HttpServletRequest request, HttpServletResponse response)
+            throws IOException {
+        outCaptcha(width, height, len, font, 0, request, response);
+    }
+
+    /**
+     * 输出验证码
+     *
+     * @param width    宽度
+     * @param height   高度
+     * @param len      长度
+     * @param font     字体
+     * @param cType    类型
+     * @param request  HttpServletRequest
+     * @param response HttpServletResponse
+     * @throws IOException IO异常
+     */
+    private static void outCaptcha(int width, int height, int len, Font font, int cType, HttpServletRequest request, HttpServletResponse response)
+            throws IOException {
         setHeader(response);
-        Captcha captcha = new GifCaptcha(width, height, len);
+        Captcha captcha = null;
+        if (cType == 0) {
+            captcha = new SpecCaptcha(width, height, len);
+        } else if (cType == 1) {
+            captcha = new GifCaptcha(width, height, len);
+        }
+        if (font != null) {
+            captcha.setFont(font);
+        }
         request.getSession().setAttribute(SESSION_KEY, captcha.text().toLowerCase());
         captcha.out(response.getOutputStream());
     }

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

@@ -17,16 +17,16 @@ public class CaptchaTest {
             SpecCaptcha specCaptcha = new SpecCaptcha();
             //specCaptcha.setCharType(Captcha.TYPE_ONLY_NUMBER);
             System.out.println(specCaptcha.text());
-            //  specCaptcha.out(new FileOutputStream(new File("C:/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++) {
-            GifCaptcha gifCaptcha = new GifCaptcha(130, 48, 5);
+            GifCaptcha gifCaptcha = new GifCaptcha();
             System.out.println(gifCaptcha.text());
-            // gifCaptcha.out(new FileOutputStream(new File("C:/Java/aa" + i + ".gif")));
+            gifCaptcha.out(new FileOutputStream(new File("D:/Java/aa" + i + ".gif")));
         }
     }
 
@@ -35,7 +35,7 @@ public class CaptchaTest {
         ChineseCaptcha chineseCaptcha = new ChineseCaptcha();
         //chineseCaptcha.setFont(new Font("微软雅黑", Font.PLAIN, 25));
         System.out.println(chineseCaptcha.text());
-        //chineseCaptcha.out(new FileOutputStream(new File("C:/Java/aa.png")));
+        chineseCaptcha.out(new FileOutputStream(new File("D:/Java/aa.png")));
     }
 
     @Test
@@ -43,7 +43,7 @@ public class CaptchaTest {
         ChineseGifCaptcha chineseGifCaptcha = new ChineseGifCaptcha();
         //chineseGifCaptcha.setFont(new Font("微软雅黑", Font.PLAIN, 30));
         System.out.println(chineseGifCaptcha.text());
-        //chineseGifCaptcha.out(new FileOutputStream(new File("C:/Java/aa.gif")));
+        chineseGifCaptcha.out(new FileOutputStream(new File("D:/Java/aa.gif")));
     }
 
 }