04.创建型————创建者模式
package Create.d.Builder;
//业务接口
public interface Tax {
void calcTax();
}
package Create.d.Builder;
//业务接口
public interface Salary {
void calcSalary();
}
package Create.d.Builder;
//业务实现类
public class HeBeiTax implements Tax {
@Override
public void calcTax() {
// TODO Auto-generated method stub
System.out.println("开始计算河北子公司的税收！");
}
}
package Create.d.Builder;
//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.d.Builder;
//业务实现类
public class GuangDongTax implements Tax {
@Override
public void calcTax() {
// TODO Auto-generated method stub
System.out.println("开始计算广东子公司的税收!");
}
}
package Create.d.Builder;
//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.d.Builder;
//工厂接口
public interface Factory {
Salary createSalary();
Tax createTax();
}
package Create.d.Builder;
//业务实现类工厂类
public class HeBeiFactory implements Factory {
@Override
public Salary createSalary() {
// TODO Auto-generated method stub
return new HeBeiSalary();
}
@Override
public Tax createTax() {
// TODO Auto-generated method stub
return new HeBeiTax();
}
}
package Create.d.Builder;
//业务实现类工厂类
public class GuangDongFactory implements Factory {
@Override
public Salary createSalary() {
// TODO Auto-generated method stub
return new GuangDongSalary();
}
@Override
public Tax createTax() {
// TODO Auto-generated method stub
return new GuangDongTax();
}
}
package Create.d.Builder;
//创建者类
public class Builder {
Factory fa;
public Builder() {
super();
}
public Builder(Factory fa) {
super();
this.fa = fa;
}
//封装业务实现类调用
public void build(){
Salary sa = fa.createSalary();
Tax tax = fa.createTax();
sa.calcSalary();
tax.calcTax();
}
}
package Create.d.Builder;
//业务调用类
public class Client {
public static void main(String[] args) {
Builder builder = new Builder(new HeBeiFactory());
builder.build();
builder = new Builder(new GuangDongFactory());
builder.build();
}
}
优点：客户端不再负责对象的创建和组装，而是把这个任务交给具体的创建类和组装类，只负责对对象的调用。
缺点： 如果产品之间差异非常大，需要编写多个创建者类才能实现，此时应考虑使用同工厂模式一同使用，效果更好。
