外观模式设计系列教程

PAGEPAGE1/子系统类集合（SubSystemClasses）：子系统类集合实现了子publicclassSubSystemOne{publicvoid{("SubSystemfirstmethod.");}}publicclassSubSystemTwo{publicvoid{("SubSystemsecondmethod.");}}publicclassSubSystemThree{publicvoid{("SubSystemthirdmethod.");}}publicclassSubSystemFour{publicvoid{("SubSystemfourthmethod.");}}publicclassFacade{privateSubSystemOneone;privateSubSystemTwotwo;privateSubSystemThreethree;privateSubSystemFourfour;publicFacade(){one=newSubSystemOne();two=newSubSystemTwo();three=newSubSystemThree();four=newSubSystemFour();}publicvoidMethodA(){("nMethodgroupA");();();();}voidMethodB(){("nMethodgroupB");();();}classProgram{staticvoidMain(stringargs){//由于Facade的作用，客户端可以根本不知道子系统类的存在Facadefacade=newFacade();();();();}}FacadeFacadeFacade互，FacadepublicclassEmployee{publicstringName{get;set;}publicintAge{get;set;}publicSalary{get;set;}}publicclassSalary{publicDateTime{get;set;}publicDateTimeTo{get;set;}public EmployeeDataAccess{publicvoidSaveEmployee(Employeeemployee){("Saveemployeetodatabase.");}publicvoidDeleteEmployee(Employeeemployee){("Remodeemployeefromdatabase.");}}publicclassSalaryDataAccess{publicvoidSaveSalary(Salarysalary){("Savesalarytodatabase.");}publicvoidDeleteSalary(Salary{("Removesalaryfromdatabase.");}}///DataAccesspublicclassDataAccess{privateEmployeeDataAccessemployeeDataAccess=newEmployeeDataAccess();privateSalaryDataAccesssalaryDataAccess=newSalaryDataAccess();publicvoidSaveEmployee(Employeeemployee){//先保存员工基本信息(employee);//保存员工薪水信息();}publicvoidRemoveEmployee(Employeeemployee){//先删除员工薪水信息();//删除员工基本信息(employee);}}classProgram{staticvoidMain(string{dataAccess=new();em