spring来了-02-HelloWorld

Posted 2020-08-05 起今知行 | 思考者 | Freedom

spring的各个版本说明：

　　在3.0以下的版本,源码有spring中相关的所有包[spring功能+依赖包]，如：2.5版本

　　在3.0以上的版本，源码中只有spring的核心功能包[没有依赖包]，如果要用依赖包，需要单独下载！

1. 在spring-framework-3.2.5.RELEASE中,
   • 核心的5个jar包，必需的
     • commons-logging-1.1.3.jar               日志(依赖包)
     • spring-beans-3.2.5.RELEASE.jar        bean节点
     • spring-context-3.2.5.RELEASE.jar      spring上下文节点
     • spring-core-3.2.5.RELEASE.jar 　　    spring核心功能
     • spring-expression-3.2.5.RELEASE.jar  spring表达式相关
2. 核心配置文件：applicationContext.xml，也可以为bean.xml

    1 <?xml version="1.0" encoding="UTF-8"?>
    2 <beans xmlns="http://www.springframework.org/schema/beans"
    3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4     xmlns:p="http://www.springframework.org/schema/p"
    5     xmlns:context="http://www.springframework.org/schema/context"
    6     xmlns:aop="http://www.springframework.org/schema/aop"
    7     xmlns:tx="http://www.springframework.org/schema/tx"
    8     xsi:schemaLocation="
    9         http://www.springframework.org/schema/beans
   10         http://www.springframework.org/schema/beans/spring-beans.xsd
   11         http://www.springframework.org/schema/context
   12         http://www.springframework.org/schema/context/spring-context.xsd
   13         http://www.springframework.org/schema/aop
   14         http://www.springframework.org/schema/aop/spring-aop.xsd
   15         http://www.springframework.org/schema/tx
   16          http://www.springframework.org/schema/tx/spring-tx.xsd">
   17 
   18     <bean id="user" class="cn.fuyi.a_helloworld.User"></bean>
   19 </beans>

3. 测试

    1 public class App {
    2 
    3     @Test
    4     public void testIOC() {
    5         Resource resource = new ClassPathResource("cn/fuyi/a_helloworld/ApplicationContext.xml");
    6         BeanFactory factory = new XmlBeanFactory(resource);
    7         
    8         User user = (User) factory.getBean("user");
    9         System.out.println(user);
   10     }
   11     
   12     
   13     @Test
   14     public void testAc() throws Exception {
   15         ApplicationContext ac = new ClassPathXmlApplicationContext("cn/fuyi/a_helloworld/ApplicationContext.xml");
   16         
   17         User user = (User)ac.getBean("user");
   18         System.out.println(user);
   19     }
   20 
   21 }