Spring 一二事（2）

静态工厂方法及实例工厂的使用：

applicationContext.xml：

 　　 <!-- factory-method 是指调用静态工厂方法 -->
     <bean id="helloWorld2" class="com.lee.spring002.createobject.method.HelloWorldFactory"
         factory-method="getInstance"></bean>

     <!-- 实例工厂 -->
     <bean id="helloWorldFactory"
         class="com.lee.spring002.createobject.method.HelloWorldFactory2"></bean>
     <!-- factory-bean 是一个工厂bean -->
     <bean id="helloWorld3" factory-bean="helloWorldFactory"
         factory-method="getInstance"></bean>

HelloWorldFactory.java

 package com.lee.spring002.createobject.method;

 import com.lee.spring001.createobject.HelloWorld;

 public class HelloWorldFactory {

     public static HelloWorld getInstance() {
         return new HelloWorld();
     }
 }

HelloWorldFactory2.java

 package com.lee.spring002.createobject.method;

 import com.lee.spring001.createobject.HelloWorld;

 public class HelloWorldFactory2 {

     public HelloWorld getInstance() {
         return new HelloWorld();
     }
 }

测试：

     @Test
     public void testHelloWorld_StaticFactory() {

         ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

         HelloWorld hello = (HelloWorld)context.getBean("helloWorld2");
         hello.hello();
     }

     @Test
     public void testHelloWorld_InstanceFactory() {

         ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

         HelloWorld hello = (HelloWorld)context.getBean("helloWorld3");
         hello.hello();
     }

github地址：https://github.com/leechenxiang/maven-spring001-helloworld