Spring配置文件以及基本常识

package com.ant.spring;public class HellWorld {private String name;public String getName() {return name;}public void setName(String name) {this.name = name;}       //构造器public void hell() {System.out.println("hell:"+this.name);}}

<?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"> <!--  注入方式:        1.getter setters(常用)        2.构造器注入(死的应用)        3.接口注入(不常用,不推荐)       通过getters setters注入配置spring class:bean的全类名(包名+实体类类名)，通过反射的方式在IOC容器中创建bean，并要求bean中必须有无参的构造器id:标识容器中的bean.id 唯一--><bean id
package com.ant.spring;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Main {public static void main(String[] args) {//1.创建spring的IOC容器对象，并根据spring.xml文件实例化对象，调用property配置进行赋值//ApplicationContext代表IOC容器//ClassPathXmlApplicationContext：是ApplicationContext的实现类ApplicationContext con=new ClassPathXmlApplicationContext("spring.xml");//2.从IOC容器中获取bean并实例，利用id定位到IOCHellWorld hellWorld=(HellWorld) con.getBean("hellworld");hellWorld.hell();}}