Spring講解一:Spring簡介和入門,spring簡介
一、Spring是什麼?二、具體描述Spring三、搭建Spring環境
3. Spring的設定檔:一個典型的Spring項目需要建立一個或多個Bean設定檔,這些設定檔用於在Spring IOC容器中配置Bean。Bean的設定檔可以放在classpath下,也可以放在其他目錄下。
4. 建立Spring項目,編寫HelloWorld:
package com.atguigu.spring.beans;public class HelloWorld { private String name; public void setName(String name) { System.out.println("setName..."); this.name = name; } public void hello(){ System.out.println("Hello " + name); } public HelloWorld() { System.out.println("HelloWorld's construct..."); } }
<?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:util="http://www.springframework.org/schema/util" xmlns:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"> <bean id="helloworld" class="com.atguigu.spring.beans.HelloWorld"> <property name="name" value="spring"></property> </bean></beans>
package com.atguigu.spring.beans;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;
public class Main { public static void main(String[] args) { /* HelloWorld helloWorld = new HelloWorld(); helloWorld.setName("spring"); helloWorld.hello(); */ //1.建立容器 ApplicationContext ctx = new ClassPathXmlApplicationContext("appliactionContext.xml");
//2.從容器中擷取bean HelloWorld hello = (HelloWorld) ctx.getBean("helloworld");
//3.調用bean的方法 hello.hello(); }}
5.測試結果