1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace 缓存 7 { 8 class Program 9 { 10 static void Main(string[] args) 11 { 12 //字典缓存 13 { 14 for (int i = 0; i < 5; i++) 15 { 16 Console.WriteLine(DictionaryCache.GetCache<int>()); 17 Console.WriteLine(DictionaryCache.GetCache<string>()); 18 Console.WriteLine(DictionaryCache.GetCache<Peoele>()); 19 Console.WriteLine(DictionaryCache.GetCache<Student>()); 20 21 } 22 } 23 //泛型缓存 24 { 25 for (int i = 0; i < 5; i++) 26 { 27 Console.WriteLine(GenericCache<int>.GetCache()); 28 Console.WriteLine(GenericCache<string>.GetCache()); 29 Console.WriteLine(GenericCache<Peoele>.GetCache()); 30 Console.WriteLine(GenericCache<Student>.GetCache()); 31 } 32 } 33 34 Console.ReadLine(); 35 } 36 } 37 38 /// <summary> 39 /// 字典缓存,静态属性常驻内存 40 /// </summary> 41 public class DictionaryCache 42 { 43 private static Dictionary<string, object> _directory = null; 44 static DictionaryCache() 45 { 46 Console.WriteLine("这是一个静态构造函数"); 47 _directory = new Dictionary<string, object>(); 48 } 49 public static object GetCache<T>() 50 { 51 Type type = typeof(T); 52 //如果静态字典中不包含该类型时,即可加入 53 if (!_directory.ContainsKey(type.Name)) 54 { 55 _directory[type.Name] = string.Format("{0}_{1}",typeof(T).FullName,DateTime.Now.ToString("yyyy/MM/dd hh:mm:ss")); 56 } 57 return _directory[type.Name]; 58 } 59 } 60 61 62 /// <summary> 63 /// 泛型缓存 64 /// 每个不同的T类型,都会生成不同的一份副本 65 /// 适合不同的类型,需要缓存一份数据的场景,效率高 66 /// 缺点:不能清除缓存 67 /// </summary> 68 /// <typeparam name="T"></typeparam> 69 public class GenericCache<T> 70 { 71 private static string _Typetime =""; 72 static GenericCache() 73 { 74 Console.WriteLine("这是一个静态构造函数"); 75 _Typetime = string.Format("{0}_{1}",typeof(T),DateTime.Now.ToString("yyyy/MM/dd hh:mm:ss")); 76 } 77 public static string GetCache() 78 { 79 return _Typetime; 80 } 81 } 82 83 public class Peoele 84 { 85 public int id { get; set; } 86 public string name { get; set; } 87 } 88 public class Student 89 { 90 public int id { get; set; } 91 public string name { get; set; } 92 } 93 }
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