Spring4简介

1. Spring简介

Spring官网: http://spring.io/

Spring maven地址: http://repo.springsource.org/libs-release-local/org/springframework/spring/

Spring文档: spring-framework-4.0.6.RELEASE/docs/spring-framework-reference/htmlsingle/index.html

Spring作者：Rod Johnson；

核心思想：IOC控制反转；AOP面向切面；

2. Spring4实例

导入spring jar包，右键buildPath

commons-collections-3.2.jar
commons-logging.jar
spring-aop-4.0.6.RELEASE.jar
spring-beans-4.0.6.RELEASE.jar
spring-context-4.0.6.RELEASE.jar
spring-core-4.0.6.RELEASE.jar
spring-expression-4.0.6.RELEASE.jar

新建项目Spring401

HelloWorld.java

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

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.andrew.test.HelloWorld"></bean>
</beans>

Test.java

package com.andrew.service;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.andrew.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：
Spring4你好！