设计模式之抽象工厂模式

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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; } }?

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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(); } }?

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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(); } }?

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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; } } ?

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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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