Spirng第一个程序


实例工程:

wKiom1V_IdSCIX63AAE60gz5Egg486.jpg

此图来自视频


新建java工程

wKiom1V_NDWCPvgQAAC3pV8AUHo937.jpg


将spring中的包导入。

新建接口IHelloMessage:

package com.jike.spring.ch01;

public interface IHelloMessage {
	public String sayHello();
}


实例化两个接口类:

HelloChina

package com.jike.spring.ch01;

public class HelloChina implements IHelloMessage {

	@Override
	public String sayHello() {
		// TODO Auto-generated method stub
		return "大家好";
	}

}


HelloWorld

package com.jike.spring.ch01;

public class HelloWorld implements IHelloMessage {

	@Override
	public String sayHello() {
		// TODO Auto-generated method stub
		return "Hello World";
	}

}


添加Person类:

package com.jike.spring.ch01;

public class Person {
	private IHelloMessage helloMessage;

	public IHelloMessage getHelloMessage() {
		return helloMessage;
	}

	public void setHelloMessage(IHelloMessage helloMessage) {
		this.helloMessage = helloMessage;
	}
	
	public String sayHello(){
		return this.helloMessage.sayHello();
	}
}


加入主函数类:

package com.jike.spring.ch01;

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
		Resource r = new FileSystemResource("helloMessage.xml");
		BeanFactory f = new XmlBeanFactory(r);
		Person person = (Person)f.getBean("person");
		String s = person.sayHello();
		System.out.println("The person is curretnly saying" + s);
	}

}


添加配置文件:

<?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.ch01.HelloWorld"></bean>
	<bean id = "helloChina" class = "com.jike.spring.ch01.HelloChina"></bean>
	<bean id = "person" class = "com.jike.spring.ch01.Person">
		<property name="helloMessage" ref="helloWorld"></property>
	</bean>
</beans>


运行。


注意,在lib中添加jar包,在http://commons.apache.org/proper/commons-logging/download_logging.cgi中下载

wKioL1V_NXeiYLKHAAAghUZ8s6w448.jpg

否则会出现

Exception in thread "main"java.lang.NoClassDefFoundError:

org/apache/commons/logging/LogFactory

的错误信息







极客学院:http://www.jikexueyuan.com/course/675_2.html?ss=1



你可能感兴趣的:(java,Web)