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(一)spring入门
一、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"> <!-- 在容器文件中配置bean(service/dao/domain/action/数据源) --> <!-- bean元素作用:当spring框架加载时,spring就会自动创建一个bean对象,并放入内存中 UserService userService=new UserService(); id号与userService对应 userService.setName="张三" --> <bean id="userService" class="com.service.UserService"> <property name="name"> <value>张三</value> </property> <!-- 在userService中引用byService bean 第一个byeService,表示userService的属性,第二个表示引用 --> <property name="byeService" ref="byeService"></property> </bean> <bean id="byeService" class="com.service.ByeService"> <property name="name" value="http://www.mamicode.com/小明"></property> </bean> </beans>
二、Service
(一) UserService
public class UserService { private String name; ByeService byeService; public String getName() { return name; } public void setName(String name) { this.name = name; } public ByeService getByeService() { return byeService; } public void setByeService(ByeService byeService) { this.byeService = byeService; } public void sayHello(){ System.out.println("hello~~~"+name); byeService.sayBye(); } }
(二)ByeService
public class ByeService { private String name; public String getName() { return name; } public void setName(String name) { this.name = name; } public void sayBye(){ System.out.println("bye"+name); } }
三、Test
public class Test { public static void main(String[] args) { //传统方法调用UserService的sayhello方法 // UserService userService=new UserService(); // userService.setName("张三"); // userService.sayHello(); //使用spring来完成 //1、得到spring的applicationContext对象(容器对应) ApplicationContext ac=new ClassPathXmlApplicationContext("applicationContext.xml"); UserService us=(UserService) ac.getBean("userService"); us.sayHello(); //使用Util得到applicationContext
//((UserService)ApplicationContextUtil.getApplicationContext().getBean("userService")).sayHello(); //ac代表容器applicationContext //ByeService bs=(ByeService) ac.getBean("byeService"); //bs.sayBye(); } }
四、Util
final public class ApplicationContextUtil { private static ApplicationContext ac=null; private ApplicationContextUtil(){ } static{ ac=new ClassPathXmlApplicationContext("applicationContext.xml"); } public static ApplicationContext getApplicationContext(){ return ac; } }
(一)spring入门
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