Eclipse建立一个spring的HelloWord

柔光的暖阳◎ 2021-09-15 02:24 202阅读 0赞

1、新建Java project ，命名为spring-2

2、在spring-2下建立个文件lib

3、在文件lib里导入 五个包

> commons-logging-1.1.1.jar   
>  spring-beans-4.0.0.RELEASE.jar   
>  spring-context-4.0.0.RELEASE.jar   
>  spring-core-4.0.0.RELEASE.jar   
> 
> 
> spring-expression-4.0.0.RELEASE.jar

4、选中这五个包---》右键--》build path--》configure build path

5、在src的包下，建立一个HelloWorld类

package com.wgs.spring.beans;
    
    public class HelloWorld {
    	private String name;
    	public void setName2(String name) {
    		this.name = name;
    	}
    	
    	public void hello(){
    		System.out.println("hello: "+name);
    	}
    	public HelloWorld(){
    		System.out.println("HelloWorld's Constructor.....");
    	}
    }

6、在src的包下，建立一个Main类

package com.wgs.spring.beans;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class Main {
    	public static void main(String[] args) {
    		/*
    		//创建一个HelloWorld的一个对象
    		HelloWorld helloWorld=new HelloWorld();
    		//为name属性赋值
    		helloWorld.setName("spring");
    		//调用hello方法
    		helloWorld.hello();
    		*/
    		
    		//1、创建spring的IOC容器对象
    		//ApplicationContext代表IOC容器
    		//ClassPathXmlApplicationContext：从 类路径下加载配置文件
    		
    		ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
    		//2、从IOC容器获取Bean实例
    		HelloWorld helloWorld=(HelloWorld) ctx.getBean("helloworld");
    		//3、调用hello方法
    		helloWorld.hello();
    	}
    }

7、创建一个Spring配置文件，即new–>Spring Bean Configuration File

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    	
    	
    	<bean id="helloworld" class="com.wgs.spring.beans.HelloWorld">
    		<property name="name2" value="spring"></property>
    	</bean>
    
    </beans>

运行结果如下：

> 三月 25, 2018 10:37:19 下午 org.springframework.context.support.AbstractApplicationContext prepareRefresh  
> 信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@49097b5d: startup date \[Sun Mar 25 22:37:19 CST 2018\]; root of context hierarchy  
> 三月 25, 2018 10:37:19 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions  
> 信息: Loading XML bean definitions from class path resource \[applicationContext.xml\]  
> HelloWorld's Constructor.....  
> hello: spring  
>

>   
>