1.Spring IoC简单例子

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mob604756f44f2a 2016-01-01 17:22:00

文章标签 Spring IoC spring xml java 文章分类 数据库

Spring IoC简单例子

1.IHelloMessage.java

1 package com.tony.spring.chapter01;
2 
3 public interface IHelloMessage {
4     public String sayHello();
5 }

2.HelloWorld.java

 1 package com.tony.spring.chapter01;
 2 
 3 public class HelloWorld implements IHelloMessage {
 4 
 5     @Override
 6     public String sayHello() {
 7         return "Hello everyone";
 8     }
 9 
10 }

3.HelloChina.java

 1 package com.tony.spring.chapter01;
 2 
 3 public class HelloChina implements IHelloMessage {
 4 
 5     @Override
 6     public String sayHello() {
 7         return "大家好";
 8     }
 9     
10 }

4.Person.java

 1 package com.tony.spring.chapter01;
 2 
 3 public class Person {
 4 
 5     private IHelloMessage helloMessage;
 6 
 7     public IHelloMessage getHelloMessage() {
 8         return helloMessage;
 9     }
10 
11     public void setHelloMessage(IHelloMessage helloMessage) {
12         this.helloMessage = helloMessage;
13     }
14     
15     public String sayHello(){
16         return helloMessage.sayHello();
17     }
18 }

5.Main.java

 1 package com.tony.spring.chapter01;
 2 
 3 import org.springframework.beans.factory.BeanFactory;
 4 import org.springframework.beans.factory.xml.XmlBeanFactory;
 5 import org.springframework.core.io.FileSystemResource;
 6 import org.springframework.core.io.Resource;
 7 
 8 public class Main {
 9 
10     public static void main(String[] args) {
11         Resource r = new FileSystemResource("helloMessage.xml");
12         BeanFactory f = new XmlBeanFactory(r);
13         Person person = (Person)f.getBean("person");
14         String s = person.sayHello();
15         System.out.println("他说"+s);
16     }
17 
18 }

6.helloMessage.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN" 
 3 "http://www.springframework.org/dtd/spring-beans.dtd">
 4 <beans>
 5     <bean id="helloWorld" class="com.tony.spring.chapter01.HelloWorld"></bean>
 6     <bean id="helloChina" class="com.tony.spring.chapter01.HelloChina"></bean>
 7     <bean id="person" class="com.tony.spring.chapter01.Person">
 8         <!--<property name="helloMessage" ref="helloChina"/>-->
 9         <property name="helloMessage" ref="helloWorld"/>
10     </bean>
11 </beans>