Spring讲解一：Spring简介和入门

package com.atguigu.spring.beans;

public class HelloWorld {

    private String name;
    
    public void setName(String name) {
        System.out.println("setName...");
        this.name = name;
    }
    
    public void hello(){
        System.out.println("Hello " + name);
    }
    
    
    public HelloWorld() {
        System.out.println("HelloWorld‘s construct...");
    }
    
    
}

<?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:util="http://www.springframework.org/schema/util"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans   
　　　　　　　　　　　　　  http://www.springframework.org/schema/beans/spring-beans.xsd
                       http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">

    <bean id="helloworld" class="com.atguigu.spring.beans.HelloWorld">
        <property name="name" value="spring"></property>
    </bean>

</beans>

package com.atguigu.spring.beans;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Main {

    public static void main(String[] args) {
        /*
        HelloWorld helloWorld = new HelloWorld();
        helloWorld.setName("spring");
        helloWorld.hello();
        */
    　　//1.创建容器
        ApplicationContext ctx = new     ClassPathXmlApplicationContext("appliactionContext.xml");
　　　　//2.从容器中获取bean
        HelloWorld hello = (HelloWorld) ctx.getBean("helloworld");
　　　　//3.调用bean的方法
        hello.hello();
    }
}