峰Spring4学习HelloWorld

Posted 2020-09-10 有点懒惰的大青年

HelloWorld.java:

package com.cy.test;

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

Test.java:

package com.cy.service;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.cy.test.HelloWorld;

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

beans.xml spring管理bean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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">

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

  
</beans>

console打印：