添加随机生成N位数的随机数（字母、数字组成）

gic-enterprise-base-api/src/main/java/com/gic/enterprise/utils/CreatePasswordAutoUtils.java

+package com.gic.enterprise.utils;
+
+import java.util.Random;
+
+/**
+ * 随机生成字母、数字参合的密码
+ * @ClassName: CreatePasswordAutoUtils

+ * @Description: 

+ * @author guojuxing

+ * @date 2019/8/9 4:39 PM

+ */
+public class CreatePasswordAutoUtils {
+    /**
+     * 随机生成字母、数字参合的密码
+     * @param length 生成多少位数的密码
+     * @return
+     */
+    public static String getStringRandom(int length) {
+
+        String val = "";
+        Random random = new Random();
+        //length为几位密码
+        for (int i = 0; i < length; i++) {
+            String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num";
+            //输出字母还是数字
+            if ("char".equalsIgnoreCase(charOrNum)) {
+                //输出是大写字母还是小写字母
+                int temp = random.nextInt(2) % 2 == 0 ? 65 : 97;
+                val += (char) (random.nextInt(26) + temp);
+            } else if ("num".equalsIgnoreCase(charOrNum)) {
+                val += String.valueOf(random.nextInt(10));
+            }
+        }
+        return val;
+    }
+}