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1、班级： 学号： 姓名:指导教师： 成绩：实验题目：状态模式 实验时间：一、实验目的练习并掌握状态模式，理解它的适用场景，掌握如何在实际开发过程中使用这个模式，并学会分析这个模式的使用效果。二、 实验内容图书管理系统中的图书有两种状态：在馆和借出；请用状态模式来实现两种状态的转换。（1）、类图（2）、时序图（3）、实现代码（4）、测试代码1、类图2、时序图3、实现代码using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace ConsoleApplication1 clas
2、s Program public interface State void Loan(); /借出?的?方?法 void Return(); /归还1的?方?法/在馆Y状态?类public class InLibraryState:State Library library; public InLibraryState(Library library) this.library = library; public InLibraryState() public void Loan() Console.WriteLine(借书成功|了?!); library.bookloan(); librar
3、y.setState(library .getOutLibrary (); public void Return() Console.WriteLine(图?书如?今?还1在馆Y中D，?操作有D误); /借出?状态?类public class OutLibraryState:State Library library; public OutLibraryState(Library library) this.library = library; public OutLibraryState() public void Loan() Console.WriteLine(图?书如?今?借出?了?，
4、?操作有D误); public void Return() Console.WriteLine(还1书成功|了?); library.bookreturn(); library.setState(library .getInLibrary (); /图?书馆Y类 public class Library State inlibrary; State outlibrary; State state ; int Count = 0; public Library(int bookCount) inlibrary = new InLibraryState(this); outlibrary = ne
5、w OutLibraryState(this); this.Count = bookCount; if (bookCount 0) state = inlibrary; public void Loan() state.Loan(); public void Return() state.Return(); public void setState(State state) this.state =state; public State getInLibrary() return inlibrary ; public State getOutLibrary() return outlibrar
6、y; public int getbookCount() return Count; public void bookloan() if (Count != 0) Count = Count-1; public void bookreturn() Count = Count + 1; public void print(Library library) if (library.getbookCount() 0) Console.WriteLine(图?书如?今?在图?书馆Y中D); else Console.WriteLine(图?书已?被?借出?); Console.ReadKey(); 4
7、、测试代码class test static void Main(string args) Library library = new Library(1); library.Loan(); library.print(library); library.Return(); library.print(library); Console.WriteLine(*); library.Loan(); library.Loan(); library.print(library); library.Return(); library.Return(); library.print(library); 5、测试显示结果图