《Spring学习指南》- SpringIOC基于XML配置的Bean

package cn.knightzz.xml.bean;


public class UserBean {

    public void test() {
        System.out.println("Hello Spring!");
    }
}

package cn.knightzz.xml;

import cn.knightzz.xml.bean.UserBean;
import org.springframework.context.support.ClassPathXmlApplicationContext;


public class App {

    public static void main(String[] args) {

        // 获取spring上下文
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
        // 通过getBean 方法获取实例化后的对象
        UserBean userBean = (UserBean) applicationContext.getBean("userBean");
        userBean.test();
    }
}

• 添加 dao.xml 配置

• 读取多个配置

package cn.knightzz.xml;

import cn.knightzz.xml.bean.MyBean;
import cn.knightzz.xml.bean.UserBean;
import org.springframework.context.support.ClassPathXmlApplicationContext;


public class App {

    public static void main(String[] args) {
        // TODO : 读取多个配置文件
        ClassPathXmlApplicationContext applicationContext2 =
                new ClassPathXmlApplicationContext("spring.xml", "dao.xml");
        MyBean myBean = (MyBean) applicationContext2.getBean("myBean");
        UserBean userBean2 = (UserBean) applicationContext2.getBean("userBean");
        myBean.test();
        userBean2.test();

    }
}