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1.抽象工厂模式
//产品生产车间1
public interface Producer1{
public ... createProducer1Method1();
public ... createProducer1Method2();
}
//产品生产车间2
public interface Producer2{
public ... createProducer2Method1();
public ... createProducer2Method2();
}
//产品生产车间生产抽象工厂
public abstact class Factory{
public Producer1 genProducer1(){//默认实现};
public Producer2 genProducer2(){//默认实现};
}
public class FactoryImpl1 extends Factory{
public Producer1 genProducer1(){
super.genProducer1();
//附件实现
};
//默认采用父类genProducer2()实现
}
2.EJB中使用工厂模式
Context ctx = new InitContext();
//调用工厂方法获取Home接口
MyHome myHome = ctx.lookup("myHome");
//调用产品工厂方法生产产品
MyInteface myInterface = myHome.create(...);
3. JMS 中的工厂方法
Context ctx = new InitContext();
//获取工厂类实例
Topic topic = (Topic)ctx.lookup("topic");
TopicConnectionFactory tcf = (TopicConnectionFactory)ctx.lookup("tpc");
//利用工厂类创建connection
TopicConnection tc = tcf.createTopicConnection();
//调用工厂方法创建session
TopicSession ts = tc.createTopicSession(false,Session.AUTO_ACKNOWLEDGE);
TopicPublisher tp = ts.createTopicPublisher(topic);
TextMessage tm = ts.createTextMessage("something");
tp.publish(tm);