From 71e73ee51661b3bbb83df032dc66c3df3751a629 Mon Sep 17 00:00:00 2001
From: synchronized <whvcse@foxmail.com>
Date: Fri, 27 Jul 2018 17:08:16 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E9=AA=8C=E8=AF=81=E7=A0=81?=
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MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                     | 18 ++++++++++++-
 src/main/java/com/wf/captcha/Captcha.java     | 25 ++++++++++++++++++-
 src/main/java/com/wf/captcha/Randoms.java     |  3 +++
 src/test/java/com/wf/captcha/CaptchaTest.java |  9 ++++---
 4 files changed, 50 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 43f803c..ff2ac4c 100644
--- a/README.md
+++ b/README.md
@@ -164,6 +164,9 @@ public class Test {
         // 设置字体
         gifCaptcha.setFont(new Font("Verdana", Font.PLAIN, 32));  // 有默认字体，可以不用设置
         
+        // 设置类型，纯数字、纯字母、字母数字混合
+        gifCaptcha.setCharType(Captcha.TYPE_ONLY_NUMBER);
+        
         // 生成的验证码
         String code = gifCaptcha.text();
         
@@ -187,6 +190,9 @@ public class Test {
         // 设置字体
         specCaptcha.setFont(new Font("Verdana", Font.PLAIN, 32));  // 有默认字体，可以不用设置
         
+        // 设置类型，纯数字、纯字母、字母数字混合
+        specCaptcha.setCharType(Captcha.TYPE_ONLY_NUMBER);
+        
         // 生成的验证码
         String code = specCaptcha.text();
         
@@ -194,4 +200,14 @@ public class Test {
         specCaptcha.out(outputStream);
     }
 }
-```
\ No newline at end of file
+```
+
+### 4.3.验证码类型
+
+ 类型 | 描述 
+ :--- | :--- 
+ TYPE_DEFAULT | 数字和字母混合 
+ TYPE_ONLY_NUMBER | 纯数字
+ TYPE_ONLY_CHAR | 纯字母 
+
+
diff --git a/src/main/java/com/wf/captcha/Captcha.java b/src/main/java/com/wf/captcha/Captcha.java
index fd30d31..51989f1 100644
--- a/src/main/java/com/wf/captcha/Captcha.java
+++ b/src/main/java/com/wf/captcha/Captcha.java
@@ -14,6 +14,10 @@ public abstract class Captcha extends Randoms {
     protected int width = 130; // 验证码显示宽度
     protected int height = 48; // 验证码显示高度
     private String chars = null; // 当前验证码
+    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
 
     /**
      * 生成随机验证码
@@ -21,9 +25,20 @@ public abstract class Captcha extends Randoms {
      * @return 验证码字符数组
      */
     protected char[] alphas() {
+        "".toLowerCase();
+        "".toUpperCase();
         char[] cs = new char[len];
         for (int i = 0; i < len; i++) {
-            cs[i] = alpha();
+            switch (charType) {
+                case 2:
+                    cs[i] = alpha(numMaxIndex);
+                    break;
+                case 3:
+                    cs[i] = alpha(charMinIndex, charMaxIndex);
+                    break;
+                default:
+                    cs[i] = alpha();
+            }
         }
         chars = new String(cs);
         return cs;
@@ -115,4 +130,12 @@ public abstract class Captcha extends Randoms {
     public void setHeight(int height) {
         this.height = height;
     }
+
+    public int getCharType() {
+        return charType;
+    }
+
+    public void setCharType(int charType) {
+        this.charType = charType;
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/wf/captcha/Randoms.java b/src/main/java/com/wf/captcha/Randoms.java
index 6c4127e..6a871c0 100644
--- a/src/main/java/com/wf/captcha/Randoms.java
+++ b/src/main/java/com/wf/captcha/Randoms.java
@@ -12,6 +12,9 @@ public class Randoms {
     public static final char ALPHA[] = {'2', '3', '4', '5', '6', '7', '8', '9',
             'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'G', 'K', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
             'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'};
+    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
 
     /**
      * 产生两个数之间的随机数
diff --git a/src/test/java/com/wf/captcha/CaptchaTest.java b/src/test/java/com/wf/captcha/CaptchaTest.java
index 2385e9d..b5d14b8 100644
--- a/src/test/java/com/wf/captcha/CaptchaTest.java
+++ b/src/test/java/com/wf/captcha/CaptchaTest.java
@@ -14,9 +14,12 @@ public class CaptchaTest {
 
     @Test
     public void test() throws Exception {
-        SpecCaptcha specCaptcha = new SpecCaptcha();
-        System.out.println(specCaptcha.text());
-        //specCaptcha.out(new FileOutputStream(new File("D:/a/aa.png")));
+        for (int i = 0; i < 100; i++) {
+            SpecCaptcha specCaptcha = new SpecCaptcha();
+            specCaptcha.setCharType(Captcha.TYPE_ONLY_NUMBER);
+            System.out.println(specCaptcha.text());
+            specCaptcha.out(new FileOutputStream(new File("D:/a/aa" + i + ".png")));
+        }
     }
 
     @Test