feat:生成随机数

xservice-common/src/main/java/com/xiang/xservice/basic/utils/RandomCodeUtils.java

@@ -0,0 +1,37 @@
+package com.xiang.xservice.basic.utils;
+
+import java.util.concurrent.ThreadLocalRandom;
+
+public class RandomCodeUtils {
+
+    private final static String CHAR = "0123456789ABCDEFGHJKLMNPQRSTUVWXYZ";
+
+
+    /**
+     * 生成随机位数数字码
+     * @param length    数字位数
+     * @return          数字随机数
+     */
+    public static String getNumberRandomCode(int length) {
+        StringBuilder sb = new StringBuilder(length);
+        ThreadLocalRandom random = ThreadLocalRandom.current();
+        for (int i = 0; i < length; i++) {
+            sb.append(random.nextInt(0, 10));
+        }
+        return sb.toString();
+    }
+
+    /**
+     * 生成随即位数字母数字验证码
+     * @param length    位数
+     * @return          随机验证码
+     */
+    public static String getMixtureRandomCode(int length) {
+        StringBuilder sb = new StringBuilder(length);
+        ThreadLocalRandom random = ThreadLocalRandom.current();
+        for (int i = 0; i < length; i++) {
+            sb.append(CHAR.charAt(random.nextInt(CHAR.length())));
+        }
+        return sb.toString();
+    }
+}