初识springIOC

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package cn.itcast.a_hello;public class User {private int id;private String name;public User() {super();System.out.println("------User对象创建------");}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public void init_user() {System.out.println("创建对象之后，初始化");}public void destroy_user() {System.out.println("IOC容器销毁，user对象回收!");}}

public class App1_get_ioc {//2. （方便）直接得到IOC容器对象 @Testpublic void testAc() throws Exception {// 得到IOC容器对象ApplicationContext ac = new ClassPathXmlApplicationContext("cn/itcast/a_hello/applicationContext.xml");// 从容器中获取beanUser user = (User) ac.getBean("user");System.out.println(user);}}

与测试类同一目录下applicationContext.xml

<?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"    xmlns:context="http://www.springframework.org/schema/context"    xsi:schemaLocation="        http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context.xsd"><!-- IOC容器的配置： 要创建的所有的对象都配置在这里<bean id="user" class="cn.itcast.a_hello.User" init-method="init_user" destroy-method="destroy_user" scope="singleton" lazy-init="false"></bean> --> <bean id="user" class="cn.itcast.a_hello.User"></bean></beans>

问：spring配置文件中，bean节点的id与name属性的区别?

<bean id="test" name="1test"  class="cn.itcast.b_create_obj.User"></bean>

答：id 不能有特殊符号, 且唯一，且不能以数字开始。name 可以有特殊符号

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