接口文件

Infrastructure/Hncore.Infrastructure/Common/RandomHelper.cs

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+using System;
+using System.Collections.Generic;
+
+namespace Hncore.Infrastructure.Common
+{
+   public class RandomHelper
+    {
+        #region 私有属性
+
+        /// <summary>
+        /// 随机数最小值
+        /// </summary>
+        private static int MiniNum => int.MinValue;
+
+        /// <summary>
+        /// 随机数最大值
+        /// </summary>
+        private static int MaxNum => int.MaxValue;
+
+        /// <summary>
+        /// 随机数长度
+        /// </summary>
+        private static int RandomLength => 4;
+
+        /// <summary>
+        /// 随机数来源
+        /// </summary>
+        private static string RandomString => "0123456789ABCDEFGHIJKMLNOPQRSTUVWXYZabcdefghigklmnopqrstuvwxyz";
+
+        /// <summary>
+        /// 系统默认生成随机数长度
+        /// </summary>
+        private const int RandomLengthPresent = 6;
+
+        /// <summary>
+        /// 系统默认随机数来源
+        /// </summary>
+        private const string RandomStringPresent = "0123456789ABCDEFGHIJKMLNOPQRSTUVWXYZabcdefghigklmnopqrstuvwxyz";
+
+        private static readonly Random Random = new Random(DateTime.Now.Millisecond);
+        #endregion
+
+        #region 产生随机字符
+
+        /// <summary>
+        /// 产生随机字符
+        /// </summary>
+        /// <param name="randomLength">产生随机数长度,默认为-1</param>
+        /// <param name="randomString">随机数来源</param>
+        /// <returns></returns>
+        public static string GetRandomString(int randomLength = -1, string randomString = "")
+        {
+            int randomLengthTemp;//随机数长度
+            if (randomLength > 0)
+                randomLengthTemp = randomLength;
+            else if (RandomLength > 0)
+                randomLengthTemp = RandomLength;
+            else
+                randomLengthTemp = RandomLengthPresent;
+            string randomStringTemp;//随机数来源
+            if (!string.IsNullOrEmpty(randomString))
+                randomStringTemp = randomString;
+            else if (!string.IsNullOrEmpty(RandomString))
+                randomStringTemp = RandomString;
+            else
+                randomStringTemp = RandomStringPresent;
+            string returnValue = string.Empty;
+            for (int i = 0; i < randomLengthTemp; i++)
+            {
+                int r = Random.Next(0, randomStringTemp.Length - 1);
+                returnValue += randomStringTemp[r];
+            }
+            return returnValue;
+        }
+        #endregion
+
+        #region 产生随机数
+        /// <summary>
+        /// 产生随机数
+        /// </summary>
+        /// <param name="minNum">最小随机数</param>
+        /// <param name="maxNum">最大随机数</param>
+        /// <returns></returns>
+        public static int GetRandom(int minNum = -1, int maxNum = -1)
+        {
+            int minNumTemp = minNum == -1 ? MiniNum : minNum;//最小随机数
+            int maxNumTemp = maxNum == -1 ? MaxNum : maxNum;//最大随机数
+            return Random.Next(minNumTemp, maxNumTemp);
+        }
+        #endregion
+
+        #region 生成一个0.0到1.0的随机小数
+        /// <summary>
+        /// 生成一个0.0到1.0的随机小数
+        /// </summary>
+        public double GetRandomDouble()
+        {
+            return Random.NextDouble();
+        }
+        #endregion
+
+        #region 对一个数组进行随机排序
+        /// <summary>
+        /// 对一个数组进行随机排序
+        /// </summary>
+        /// <typeparam name="T">数组的类型</typeparam>
+        /// <param name="arr">需要随机排序的数组</param>
+        public void GetRandomArray<T>(T[] arr)
+        {
+            //对数组进行随机排序的算法:随机选择两个位置，将两个位置上的值交换
+            //交换的次数,这里使用数组的长度作为交换次数
+            int count = arr.Length;
+            //开始交换
+            for (int i = 0; i < count; i++)
+            {
+                //生成两个随机数位置
+                int randomNum1 = GetRandom(0, arr.Length);
+                int randomNum2 = GetRandom(0, arr.Length);
+                //定义临时变量
+                //交换两个随机数位置的值
+                var temp = arr[randomNum1];
+                arr[randomNum1] = arr[randomNum2];
+                arr[randomNum2] = temp;
+            }
+        }
+
+        public static string Uuid(int len)
+        {
+            len = len > 32 ? 32 : len;
+            var str = Guid.NewGuid().ToString("N");
+            var list = new List<string>();
+            while (true)
+            {
+                var index = GetRandom(0, 32);
+                list.Add(str[index].ToString());
+                if (list.Count >= len)
+                    break;
+            }
+            return string.Join("", list);
+        }
+        #endregion
+    }
+}