静态工厂方法只有一个工厂类，且如果要增加产品，则需要修改工厂类代码，违背了开闭原则。工厂方法模式则将工厂类颗粒化，为每一种产品单独设立一个工厂类。
package staticfactory;
public interface Computer {
public abstract void cal();
}
package net.mosang.factory;
public class Mac implements Computer {
@Override
public void cal() {
System.out.println("苹果电脑启动。。。。");
}
}
package net.mosang.factory;
public class HP implements Computer {
@Override
public void cal() {
System.out.println("惠普电脑启动。。。。");
}
}
package net.mosang.factory;
public interface ComputerFactoryBasic {
public abstract Computer CreateComputer();
}
package net.mosang.factory;
public class MacFactory implements ComputerFactoryBasic {
@Override
public Computer CreateComputer() {
return new Mac();
}
}
package net.mosang.factory;
public class HPFactory implements ComputerFactoryBasic {
@Override
public Computer CreateComputer() {
return new HP();
}
}
package net.mosang.factory;
public class Client {
public static void main(String[] args) {
Computer computer = new MacFactory().CreateComputer();
Computer computer2 = new HPFactory().CreateComputer();
computer.cal();
computer2.cal();
}
}
输出结果
苹果电脑启动。。。。 惠普电脑启动。。。。
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