spring学习笔记（二）

HelloWorld小例子

1. 导入必要的包

        2.编写HelloSpring.java

public class HelloSpring {
    public void sayHello(){
        System.out.println("Hello Spring!");
    }
}

　　3.在src目录下新建spring的xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<bean id="hello" class="com.ysl.bean.HelloSpring">//配置bean
</bean>
</beans>

　　4.新建测试类HelloTest.java

public class HelloTest {
    public static void main(String[] args) {
        @SuppressWarnings("resource")
        ClassPathXmlApplicationContext applicationContext=new ClassPathXmlApplicationContext("spring.xml");//引入xml文件
        HelloSpring helloSpring=(HelloSpring) applicationContext.getBean("hello");
        helloSpring.sayHello();
    }
}

　　5.运行测试