2023年状态模式实验报告.doc

班级： 学号： 姓名:
指导教师： 成绩：
试验题目：状态模式 试验时间：

一、试验目旳
练习并掌握状态模式，理解它旳合用场景，掌握怎样在实际开发过程中使用这个模式，并学会分析这个模式旳使用效果。
二、 试验内容
图书管理系统中旳图书有两种状态：在馆和借出；请用状态模式来实现两种状态旳转换。
（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
{
class Program
{

public interface State
{
void Loan(); //借¨¨出?旳Ì?方¤?法¤¡§
void Return(); //归¨¦还1旳Ì?方¤?法¤¡§
}
//在¨²馆Y状Á¡ä态¬?类¤¨¤
public class InLibraryState:State
{
Library library;
public InLibraryState(Library library)
{
this.library = library;
}
public InLibraryState()
{ }
public void Loan()
{
Console.WriteLine("借¨¨书º¨¦成¨¦功|了¢?!");
library.bookloan();
librarysetState(library .getOutLibrary ());

}
public void Return()
{
Console.WriteLine("图ª?书º¨¦如¨?今?还1在¨²馆Y中D，ê?操¨´作Á¡Â有®D误¨®");
}
}
//借¨¨出?状Á¡ä态¬?类¤¨¤
public class OutLibraryState:State
{
Library library;
public OutLibraryState(Library library)
{
this.library = library;
}
public OutLibraryState()
{ }
public void Loan()
{
Console.WriteLine("图ª?书º¨¦如¨?今?借¨¨出?了¢?，ê?操¨´作Á¡Â有®D误¨®");
}
public void Return()
{
Console.WriteLine("还1书º¨¦成¨¦功|了¢?");
library.bookreturn();
library.setState(library .getInLibrary ());
}
}
//图ª?书º¨¦馆Y类¤¨¤
public class Library
{
State inlibrary;
State outlibrary;
State state ;
int Count = 0;
public Library(int bookCount)
{
inlibrary = new InLibraryState(this);
outlibrary = new 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 outlibrary;
}
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ª?书º¨¦如¨?今?在¨²图ª?书º¨¦馆Y中D");
}
else
{
Console.WriteLine("图ª?书º¨¦已°?被À?借¨¨出?");
Console.ReadKey();
}
}
}
4、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、测试显示成果图