02、Spring-HelloWorld

0. 环境准备

1) jar包

  jar包我会帮大家准备好的，所以不用担心找不到Jar包  链接：https://pan.baidu.com/s/1JJcYaspK07JL53vU-q-BUQ 提取码：1028 

c3p0-0.9.1.2.jar

commons-logging-1.1.1.jar

mysql-connector-java-5.1.7-bin.jar

spring-aop-4.0.0.RELEASE.jar

spring-beans-4.0.0.RELEASE.jar

spring-context-4.0.0.RELEASE.jar

spring-core-4.0.0.RELEASE.jar

spring-expression-4.0.0.RELEASE.jar

 

1. applicationContext.xml

 

    <!-- 配置bean -->
    <bean id="helloworld" class="com.cnblogs.www.pluto.Spring">
        <property name="name" value="Spring"></property>
    </bean>

 

2. HelloWorld.java

public class HelloWorld {

    private String name;

    public void setName(String name) {
        System.out.println("setname: "+name);
        this.name = name;
    }
    
    public void hello() {
        System.out.println("hello "+name);
    }

    public HelloWorld() {
        System.out.println("helloworld's constructor...");
    }
    
}

3. Main.java

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

public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        /* 
        HelloWorld helloWorld = new HelloWorld();
        helloWorld.setName("pluto");
        helloWorld.hello();
        */
        
        //1.创建Spring的IOC容器对象
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        //2.从IOC容器中获取Bean实例
        HelloWorld helloWorld = (HelloWorld) ctx.getBean("helloworld");
        //3.调用hello方法
        System.out.println(helloWorld);
        helloWorld.hello();
    }

}