剛學(xué)編程不久，請(qǐng)前輩們指點(diǎn)。
需求變化點(diǎn)：不同的金額，和不同的角色走不同的報(bào)銷流程

using?System;

static?class?Factory
{
????public?static?Employee?CreateEmployee(string?name)
????{
????????Employee?employee?=?null;
????????switch?(name)
????????{
????????????case?"Sales":
????????????????employee?=?new?Sales();
????????????????break;
????????????case?"ProjectManager":
????????????????employee?=?new?ProjectManager();
????????????????break;
????????}
????????if?(employee?==?null)?throw?new?Exception("傳入的名字非法！");
????????return?employee;
????}
}

abstract?class?Employee
{
????public?int?Money?{?get;?set;?}
????public?State?State?{?get;?set;?}

????public?void?Sign()
????{
????????State.ChangeState(this);
????}
}

class?Sales?:?Employee
{
????public?Sales()
????{
????????State?=?new?ProjectManagerState();
????}
}

class?ProjectManager?:?Employee
{
????public?ProjectManager()
????{
????????State?=?new?DepartmentManagerState();
????}
}

abstract?class?State
{
????public?abstract?void?ChangeState(Employee?employee);

????public?virtual?void?ChangeState(Employee?employee,?string?sign,?State?state)
????{
????????Console.WriteLine(sign);
????????employee.State?=?state;
????????employee.Sign();
????}

????public?virtual?void?FinishState(Employee?employee,?string?sign)
????{
????????Console.WriteLine(sign);
????????employee.State?=?new?FinishedState();
????????employee.Sign();
????}
}

class?ProjectManagerState?:?State
{
????public?override?void?ChangeState(Employee?employee)
????{
????????if?(employee.Money?<?200)
????????{
????????????string?sign?=?string.Format("{0}元，項(xiàng)目經(jīng)理簽字報(bào)銷",?employee.Money);
????????????FinishState(employee,?sign);
????????}
????????else
????????{
????????????string?sign?=?string.Format("{0}元，項(xiàng)目經(jīng)理簽字后，給部門經(jīng)理",?employee.Money);
????????????ChangeState(employee,?sign,?new?DepartmentManagerState());
????????}
????}
}

class?DepartmentManagerState?:?State
{
????public?override?void?ChangeState(Employee?employee)
????{
????????if?(employee.Money?<?1000)
????????{
????????????string?sign?=?string.Format("{0}元，部門經(jīng)理簽字報(bào)銷",?employee.Money);
????????????FinishState(employee,?sign);
????????}
????????else
????????{
????????????string?sign?=?string.Format("{0}元，部門經(jīng)理簽字后，給總經(jīng)理",?employee.Money);
????????????ChangeState(employee,?sign,?new?GeneralManagerState());
????????}
????}
}

class?GeneralManagerState?:?State
{
????public?override?void?ChangeState(Employee?employee)
????{
????????string?sign?=?string.Format("{0}元，總經(jīng)理簽字報(bào)銷",?employee.Money);
????????FinishState(employee,?sign);
????}
}

class?FinishedState?:?State
{
????public?override?void?ChangeState(Employee?employee)
????{
????????Console.WriteLine("簽字完成，找財(cái)務(wù)報(bào)銷{0}元",?employee.Money);
????}
}

class?Test
{
????static?void?Main()
????{
????????Employee?employee?=?Factory.CreateEmployee("Sales");
????????employee.Money?=?1150;
????????employee.Sign();

????????employee?=?Factory.CreateEmployee("ProjectManager");
????????employee.Money?=?2150;
????????employee.Sign();
????}
}

轉(zhuǎn)載于:https://www.cnblogs.com/kyorry/archive/2008/05/25/1206893.html

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