3.4.8解析委以

3.4.8解析依赖
当我们有一个类a需要在类b使用之前初始化，那么我们就需要使用spring来执行顺序的初始化。xml的配置文件如下：

<?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="b" depends-on="a"/>    <bean id="a" name="code">package com.apress.prospring2.ch03.beandependency;import org.springframework.beans.factory.xml.XmlBeanFactory;import org.springframework.core.io.ClassPathResource;/** * @author janm */public class DependencyDemo {    public static void main(String[] args) {        XmlBeanFactory bf = new XmlBeanFactory(new ClassPathResource("/META-INF/spring/beandependencydemo1-context.xml"));        B b = (B) bf.getBean("b");        A a = (A) bf.getBean("a");        System.out.println(a);        System.out.println(b);    }}

A{}Shared.getValue()=Completed}B{}Shared.getValue()=Completed}