一、学习版本 spring-framework-4.0.0
二、导入 jar 包:
三、在类路径下创建 Spring Config 文件:ApplicationContext.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">
</beans>
四、创建一个非侵入的 Bean
/**
* @author solverpeng
* @create 2016-07-15-10:09
*/
public class HelloWorld {
private String userName; public void setUserName(String userName) {
this.userName = userName;
} public void hello() {
System.out.println("hello:" + userName);
}
}
五、在 Spring Config 文件中配置该 Bean
<?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.nucsoft.spring.helloworld.HelloWorld">
<property name="userName" value="spring"/>
</bean>
</beans>
六、通过 IOC 容器对象来获取在 Spring Config 文件中配置的 Bean,并调用其方法
public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("spring/ApplicationContext.xml");
HelloWorld helloWorld = (HelloWorld) ctx.getBean("helloWorld");
helloWorld.hello(); // 输出 hello:spring
}
七、总结
两个重点:
1.在 Spring Config 中配置 Bean
2.通过 IOC 容器中获取 Sring Config 配置的 Bean 对象