设计模式之抽象工厂模式

概述  public class AbstractFactoryTest2{ public static void main(String[] args) { User user = new User(); SqlserverUser su = new SqlserverUser(); su.Insert(user); su.GetUser(1); Sys

 

public class AbstractFactoryTest2{ public static voID main(String[] args) { User user = new User(); sqlserverUser su = new sqlserverUser(); su.Insert(user); su.GetUser(1); System.out.println(); }}class User{ private int _ID; private String name; public int getID() { return _ID; } public voID setID(int _ID) { this._ID = _ID; } public String getname() { return name; } public voID setname(String name) { this.name = name; }}class sqlserverUser{ public voID Insert(User user) { System.out.println("在sql SERVER中给USER表增加一条记录"); } public User GetUser(int ID) { System.out.println("在sqlSERVER中根据ID得到User表的一条记录"); return null; }} 

 

public class AbstractFactoryTest3{ public static voID main(String[] args) { User user = new User(); IFactory factory = new sqlserverFactory(); IUser iu = factory.createuser(); iu.Inser(user); iu.GetUser(1); System.out.println(); }}interface IUser{ voID Inser(User user); User GetUser(int ID);}class sqlserverUser implements IUser{ static{ System.out.println("sqlserverUser"); } public voID Inser(User user) { System.out.println("在sql SERVER中给USER表增加一条记录"); } public User GetUser(int ID) { System.out.println("在sqlSERVER中根据ID得到User表的一条记录"); return null; }}class AccessUser implements IUser{ public voID Inser(User user) { System.out.println("在ACCESS中给USER表增加一条记录"); } public User GetUser(int ID) { System.out.println("在ACCESS中根据ID得到User表的一条记录"); return null; }}interface IFactory{ IUser createuser();}class sqlserverFactory implements IFactory{ public IUser createuser() { return new sqlserverUser(); }}class AccessFactory implements IFactory{ public IUser createuser() { return new AccessUser(); }} 

 

 

public class AbstractFactoryTest4{ public static voID main(String[] args) { User user = new User(); Department dept = new Department(); IFactory factory = new AccessFactory(); IUser iu = factory.createuser(); iu.Inser(user); iu.GetUser(1); System.out.println(); IDepartment ID = factory.CreateDepartment(); ID.Insert(dept); ID.GetDepartment(1); System.out.println(); }}class Department{ private int _ID; private String name; public int getID() { return _ID; } public voID setID(int _ID) { this._ID = _ID; } public String getname() { return name; } public voID setname(String name) { this.name = name; }}interface IDepartment{ voID Insert(Department department); Department GetDepartment(int ID);}class sqlserverDepartment implements IDepartment{ static{ System.out.println("sqlserverDepartment"); } public voID Insert(Department department) { System.out.println("在sql SERVER中给Department表增加一条记录"); } public Department GetDepartment(int ID) { System.out.println("在sqlSERVER中根据ID得到Department表的一条记录"); return null; }}class AccessDepartment implements IDepartment{ public voID Insert(Department department) { System.out.println("在Access中给Department表增加一条记录"); } public Department GetDepartment(int ID) { System.out.println("在Access中根据ID得到Department表的一条记录"); return null; }}interface IFactory{ IUser createuser(); IDepartment CreateDepartment();}class sqlserverFactory implements IFactory{ public IUser createuser() { return new sqlserverUser(); } public IDepartment CreateDepartment() { return new sqlserverDepartment(); }}class AccessFactory implements IFactory{ public IUser createuser() { return new AccessUser(); } public IDepartment CreateDepartment() { return new AccessDepartment(); }} 

 

public class AbstractFactoryTest1{ public static voID main(String[] args) { User user = new User(); Department dept = new Department(); IUser iu = DataAccess.createuser(); iu.Inser(user); iu.GetUser(1); System.out.println(); IDepartment ID = DataAccess.CreateDepartment(); ID.Insert(dept); ID.GetDepartment(1); System.out.println(); }}class DataAccess{ private static final String db = "sqlserver"; //private static final Stirng db = "Access"; enum StrList { sqlserver,Access } public static IUser createuser() { IUser result = null; switch(StrList.valueOf(db)) { case sqlserver: result = new sqlserverUser(); break; case Access: result = new AccessUser(); break; } return result; } public static IDepartment CreateDepartment() { IDepartment result = null; switch(StrList.valueOf(db)) { case sqlserver: result = new sqlserverDepartment(); break; case Access: result = new AccessDepartment(); break; } return result; }} 

 

public class AbstractFactoryTest5{ public static voID main(String[] args) { try{ User user = new User(); Department dept = new Department(); IUser iu = DataAccess.createuser(); iu.Inser(user); iu.GetUser(1); System.out.println(); IDepartment ID = DataAccess.CreateDepartment(); ID.Insert(dept); ID.GetDepartment(1); System.out.println(); }catch(Exception e){ System.out.println(e.toString()); } }}class DataAccess{ private static final String db = "sqlserver"; public static IUser createuser() { IUser cn1 = null; try{ Class classname = Class.forname("sqlserverUser"); cn1 =(IUser)(classname.newInstance()); }catch(illegalaccessexception e){} catch(InstantiationException e){} catch(ClassNotFoundException e){} return cn1; } public static IDepartment CreateDepartment()throws ClassNotFoundException { Object cn2 = null; try{ Class classname = Class.forname("sqlserverDepartment"); cn2 = (IDepartment)(classname.newInstance()); }catch(illegalaccessexception e){} catch(InstantiationException e){} catch(ClassNotFoundException e){} return (IDepartment)cn2; }} 

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