Spring 一二事（2）

静态工厂方法及实例工厂的使用：

applicationContext.xml：

 1 　　 <!-- factory-method 是指调用静态工厂方法 -->
 2     <bean id="helloWorld2" class="com.lee.spring002.createobject.method.HelloWorldFactory"
 3         factory-method="getInstance"></bean>
 4
 5     <!-- 实例工厂 -->
 6     <bean id="helloWorldFactory"
 7         class="com.lee.spring002.createobject.method.HelloWorldFactory2"></bean>
 8     <!-- factory-bean 是一个工厂bean -->
 9     <bean id="helloWorld3" factory-bean="helloWorldFactory"
10         factory-method="getInstance"></bean>

HelloWorldFactory.java

 1 package com.lee.spring002.createobject.method;
 2
 3 import com.lee.spring001.createobject.HelloWorld;
 4
 5 public class HelloWorldFactory {
 6
 7     public static HelloWorld getInstance() {
 8         return new HelloWorld();
 9     }
10 }

HelloWorldFactory2.java

 1 package com.lee.spring002.createobject.method;
 2
 3 import com.lee.spring001.createobject.HelloWorld;
 4
 5 public class HelloWorldFactory2 {
 6
 7     public HelloWorld getInstance() {
 8         return new HelloWorld();
 9     }
10 }

测试：

 1     @Test
 2     public void testHelloWorld_StaticFactory() {
 3
 4         ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
 5
 6         HelloWorld hello = (HelloWorld)context.getBean("helloWorld2");
 7         hello.hello();
 8     }
 9
10     @Test
11     public void testHelloWorld_InstanceFactory() {
12
13         ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
14
15         HelloWorld hello = (HelloWorld)context.getBean("helloWorld3");
16         hello.hello();
17     }

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