01.创建型————简单工厂模式

package Create.a.SimpleFactory;

//业务接口
public interface Salary {
void calcSalary();
}

package Create.a.SimpleFactory;

//业务实现类
public class HeBeiSalary implements Salary {

@Override
public void calcSalary() {
// TODO Auto-generated method stub
System.out.println("开始计算河北子公司的薪资！");
}

}

package Create.a.SimpleFactory;

//业务实现类
public class GuangDongSalary implements Salary {

@Override
public void calcSalary() {
// TODO Auto-generated method stub
System.out.println("开始计算广东子公司的薪资!");
}

}

package Create.a.SimpleFactory;

//工厂类
public class SimpleFactory {

public static Salary createSalary(String name){
if(name.equals("HeBei")){
return new HeBeiSalary();
}
if(name.equals("GD")){
return new GuangDongSalary();
}
return null;

}

}

如果后期需求需要变更时，即需要变动if条件内容

package Create.a.SimpleFactory;

//业务调用类
public class Client {
public static void main(String[] args) {
Salary sa = SimpleFactory.createSalary("HeBei");
sa.calcSalary();
sa = SimpleFactory.createSalary("GD");
sa.calcSalary();
}
}