建立 spring的工程
编写java类
配置文件
step one
新建一个普通的java的项目
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载入java包
新建lib文件夹
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复制进入java包
把lib加入到java build path中
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新增class IHelloMessage
//HelloSpring/src/com/jike/spring/chapter01/IHelloMessage .java
package com.jike.spring.chapter01;
public interface IHelloMessage {
public String sayHello();
}
编写helloworld hellochina两个类实现该接口
//HelloSpring/src/com/jike/spring/chapter01/HelloWorld .java
package com.jike.spring.chapter01;
public class HelloWorld implements IHelloMessage {
@Override
public String sayHello() {
// TODO Auto-generated method stub
return "Hello World";
}
}
//path HelloSpring/src/com/jike/spring/chapter01/HelloChina .java
package com.jike.spring.chapter01;
public class HelloChina implements IHelloMessage {
@Override
public String sayHello() {
// TODO Auto-generated method stub
return "大家好";
}
}
项目目录下面新建helloMessage.xml
///HelloSpring/helloMessage.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="helloWorld" class="com.jike.spring.chapter01.HelloWorld"></bean>
<bean id="helloChina" class="com.jike.spring.chapter01.HelloChina"></bean>
<bean id="person" class="com.jike.spring.chapter01.Person">
<property name="helloMessage" ref="helloChina"/>
</bean>
</beans>
编写Main.java
package com.jike.spring.chapter01;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
public class Main {
public static void main(String[] args) {
// TODO Auto-generated method stub
//利用FileSystemResource读取配置文件
Resource r = new FileSystemResource("helloMessage.xml");
//利用XmlBeanFactory来加载配置文件，启动IOC容器
BeanFactory f = new XmlBeanFactory(r);
//从IOC容器中获取Person类的实例
Person person = (Person) f.getBean("person");
//person实例向大家输出问候信息
String s = person.sayHello();
//在系统控制台中打印问候信息，由于在这里配置文件中配置是HelloWorld的实例，
//所以，在这里打印的是字符串：HelloWorld
System.out.println("The Person is currently saying: "+s);
}
}
运行main.java。执行成功
