spring基于xml的IOC环境搭建和入门

配置pom.xml的依赖

    jar

    
        
            org.springframework
            spring-context
            5.0.2.RELEASE
        
    

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在resources中创建bean.xml

导入约束

       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">

把对象的创建交给spring来管理

id为获取时的唯一标志，class为要反射的全限定类名

    
    class="cn.flypig666.service.impl.AccountServiceImpl">
    class="cn.flypig666.dao.impl.AccountDaoImpl">

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使用：

 1 public static void main(String[] args) {
 2 
 3         //1. 获取核心容器对象
 4         ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
 5         //2. 根据id获取Bean对象
 6         IAccountService as = (IAccountService) ac.getBean("accountService");
 7         //通过得到IAccountDao的字节码进行强转
 8         IAccountDao ad = ac.getBean("accountDao",IAccountDao.class);
 9         System.out.println(as);
10         System.out.println(ad);
11 
12     }