XML配置
<?xml version="1.0" encoding="UTF-8"?><beans xmlns=""xmlns:xsi=""xmlns:context=""xsi:schemaLocation=""><context:component-scan base-package="org.example"/></beans>
调用xml文件代码
ApplicationContext ctx=new ClassPathXmlApplicationContext("beans.xml");PersonService personService=(PersonService)ctx.getBean("personService");personService.save();
personservicebean方法
package cn.cast.service.impl;import javax.annotation.Resource;import org.springframework.stereotype.Service;import cn.cast.service.PersonService;import cn.cast.dao.PersonDao;@Servicepublic class PersonServiceBean implements PersonService {@Resourceprivate PersonDao personDaoBean;public void show() {personDaoBean.show();}public void setPersonDaoBean(PersonDao personDaoBean) {this.personDaoBean = personDaoBean;}public PersonDao getPersonDaoBean() {return personDaoBean;}}persondaobean方法package cn.cast.dao.impl;import org.springframework.stereotype.Repository;import cn.cast.dao.PersonDao;@Repository public class PersonDaoBean implements PersonDao {public void show(){System.out.println("执行PersonDaoBean中的add()方法");} }
测试方法
package cn.cast.main;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import cn.cast.service.PersonService;public class Testmain {public static void main(String args[]){ApplicationContext ctx=new ClassPathXmlApplicationContext("beans.xml");PersonService personService=(PersonService)ctx.getBean("personServiceBean");personService.show();}}
–定义Bean的注解
@Controller
@Controller("Bean的名称")
定义控制层Bean,如Action
@Service
@Service("Bean的名称")
定义业务层Bean
@Repository
@Repository("Bean的名称")
定义DAO层Bean
@Component
定义Bean, 不好归类时使用.
–定义Bean的作用域和生命过程
@Scope("prototype")
值有:singleton,prototype,session,request,session,globalSession
@PostConstruct
相当于init-method,使用在方法上，，当Bean初始化时执行。
@PreDestroy
相当于destory-method，使用在方法上，当Bean销毁时执行。
分明是比谁记的都清楚，比谁都更加在意，
