02Spring-HelloWorld

Posted 2020-12-23 HOsystem

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

 

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

SpringBean

 

2. HelloWorld.java

 1 public class HelloWorld {
 2 
 3     private String name;
 4 
 5     public void setName(String name) {
 6         System.out.println("setname: "+name);
 7         this.name = name;
 8     }
 9     
10     public void hello() {
11         System.out.println("hello "+name);
12     }
13 
14     public HelloWorld() {
15         System.out.println("helloworld‘s constructor...");
16     }
17     
18 }

HelloWorld

3. Main.java

 1 import org.springframework.context.ApplicationContext;
 2 import org.springframework.context.support.ClassPathXmlApplicationContext;
 3 
 4 public class Main {
 5 
 6     public static void main(String[] args) {
 7         // TODO Auto-generated method stub
 8         /* 
 9         HelloWorld helloWorld = new HelloWorld();
10         helloWorld.setName("pluto");
11         helloWorld.hello();
12         */
13         
14         //1.创建Spring的IOC容器对象
15         ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
16         //2.从IOC容器中获取Bean实例
17         HelloWorld helloWorld = (HelloWorld) ctx.getBean("helloworld");
18         //3.调用hello方法
19         System.out.println(helloWorld);
20         helloWorld.hello();
21     }
22 
23 }

Main