九、查看容器内对象

　String[] beanNames = context.getBeanDefinitionNames(); 获取容器内所有beanId数组，返回一个string数组

<?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="c1" class="com.spring.ioc.entity.Computer">
        <constructor-arg name="brand" value="联想">constructor-arg>
        <constructor-arg name="price" value="3085">constructor-arg>
        <constructor-arg name="sn" value="8389283012">constructor-arg>
        <constructor-arg name="type" value="台式机">constructor-arg>
    bean>

    <bean class="com.spring.ioc.entity.Computer">
        <constructor-arg name="brand" value="微星">constructor-arg>
        <constructor-arg name="price" value="2563">constructor-arg>
        <constructor-arg name="sn" value="5689242302">constructor-arg>
        <constructor-arg name="type" value="台式机">constructor-arg>
    bean>

    <bean class="com.spring.ioc.entity.Computer">
        <constructor-arg name="brand" value="华硕">constructor-arg>
        <constructor-arg name="price" value="8063">constructor-arg>
        <constructor-arg name="sn" value="4246402302">constructor-arg>
        <constructor-arg name="type" value="笔记本电脑">constructor-arg>
    bean>

    <bean id="company" class="com.spring.ioc.entity.Company">
        
        <property name="rooms">
            <set>
                <value>2001-总裁办value>
                <value>2003-总经理办公室value>
                <value>2010-研发部会议室value>
                <value>2001-总裁办value>
            set>
        property>
        <property name="computers">
            
            <map>
                <entry key="dev-88172" value-ref="c1">entry>
                
                <entry key="dev-88173">
                    <bean class="com.spring.ioc.entity.Computer">
                        <constructor-arg name="brand" value="联想">constructor-arg>
                        <constructor-arg name="price" value="5088">constructor-arg>
                        <constructor-arg name="sn" value="4243433435">constructor-arg>
                        <constructor-arg name="type" value="笔记本">constructor-arg>
                    bean>
                entry>
            map>
        property>

        <property name="info">
            <props>
                <prop key="phone">1008866prop>
                <prop key="address">长江路80号南阳理工学院prop>
                <prop key="website">http://www.xxx.comprop>
            props>
        property>
    bean>
beans>

package com.spring.ioc;

import com.spring.ioc.entity.Company;
import com.spring.ioc.entity.Computer;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringApplication {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        String[] beanNames = context.getBeanDefinitionNames();
        for(String beanName:beanNames){
            System.out.println(beanName);
        }
        Computer computer = context.getBean("com.spring.ioc.entity.Computer", Computer.class);
        System.out.println(computer.getBrand());
        Computer computer1 = context.getBean("com.spring.ioc.entity.Computer#1", Computer.class);
        System.out.println(computer1.getBrand());
    }
}

　getBeanDefinitionNames()方法不会获取到内置bean的id，可以获取多个匿名bean的id按顺序排列

　使用context.getBean()获取匿名bean时，如果不加编号，则默认获取到第一个匿名bean，也可以添加编号#1获取具体需要的匿名bean