Spring4 -- Bean

目录结构：

1.创建HelloWorld类：

package com.test;

public class HelloWorld {
public void say(){
System.out.println("Spring4你好！");
}

}

2.配置beans.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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">

<bean id="helloWorld" class="com.test.HelloWorld"></bean>
  

</beans>

3.测试该bean：

package com.service;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.test.HelloWorld;

public class Test {
public static void main(String[] args) {
ApplicationContext ac=new ClassPathXmlApplicationContext("beans.xml");
HelloWorld helloWorld=(HelloWorld)ac.getBean("helloWorld");
helloWorld.say();
}

}

运行结果：