spring学习笔记(二)-----spring HelloWorld版本

  sping2.5学习jar包详细说明:

   下载spring，然后进行解压缩，在解压目录中找到下面jar文件，

    基本包

dist\spring.jar

lib\jakarta-commons\commons-logging.jar

 

如果使用了切面编程(AOP),还需要下列jar文件

lib/aspectj/aspectjweaver.jar和aspectjrt.jar

lib/cglib/cglib-nodep-2.1_3.jar

 

如果使用了JSR-250中的注解,如@Resource/@PostConstruct/@PreDestroy,还需要下列jar文件

lib\j2ee\common-annotations.jar

 

 

    Sping的xml配置文件 bean.xml(名字不固定)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
	<bean id="hello" class="com.ynxinhua.bean.Hello">
		<property name="message" value="我的第一个Spring2.5程序!" />
	</bean>
</beans>

    Hello.java

package com.ynxinhua.bean;
public class Hello {
	private String message;

	public void setMessage(String message) {
		this.message = message;
	}

	public String getMessage() {
		return message;
	}
}

    SpringDemo.java

package com.ynxinhua.demo;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;
import com.ynxinhua.bean.Hello;
public class SpringDemo {

	public static void main(String[] args) {
		// 通过ClassPath来定位配置文件
		ClassPathResource resource = new ClassPathResource("bean.xml");
		// 以xml方式加载配置文件
		BeanFactory factory = new XmlBeanFactory(resource);
		// 由sping框架来创建bean对象
		Hello hello = (Hello) factory.getBean("hello");
		System.out.println(hello.getMessage());

		//建议采用此种方法来加载配置文件
		System.out.println("----采用applicationContext------");
		ApplicationContext context = new ClassPathXmlApplicationContext("bean.xml");
		Hello hello1=(Hello) context.getBean("hello");
		System.out.println(hello1.getMessage());
	}

}