學習筆記專區

package model;

//本頁是java組態

//id是方法名稱，class是回傳值

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

@Configuration

public class SpringJavaConfig {

    // <bean id="date1" class="java.util.Date"></bean>

    @Bean

    public java.util.Date date1() {

       return new java.util.Date(100000000000000L);

    }

    // <bean id="demoBean" class="model.DemoBean">

    //DemoBean物件有一個方法是setDate，要放日期物件進去

//  public void setDate(java.util.Date date) {

//     this.date = date;

//  }

    // <property name="date" ref="date"></property>

    // </bean>

    @Bean

    public DemoBean demoBean() {

       DemoBean demoBean = new DemoBean();//先new自己要回傳型別的物件

       demoBean.setDate(date1());

       return demoBean;

    }

    // <bean id="demoDAO" class="model.DemoDAO">

    // <property name="demoBean" ref="demoBean"></property>

    // </bean>

    //DAO中有一個setDemoBean的方法

//  public void setDemoBean(DemoBean demoBean) {

//     this.demoBean = demoBean;

//  }

    @Bean

    public DemoDAO demoDAO() {

       DemoDAO demoDAO = new DemoDAO();

       demoDAO.setDemoBean(demoBean());

       return demoDAO;

    }

    // <bean id="demoService" class="model.DemoService"> <property

    // name="demoDAO" ref="demoDAO"></property> </bean>

    @Bean

    public DemoService demoService() {

       DemoService demoService = new DemoService();

       demoService.setDemoDAO(demoDAO());

       return demoService;

    }

}

package test;

import model.DemoBean;

import model.DemoDAO;

import model.DemoService;

import model.SpringJavaConfig;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ConfigurableApplicationContext;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class TestClass {

    public static void main(String[] args) {

       ApplicationContext context =

              new AnnotationConfigApplicationContext(SpringJavaConfig.class);

       DemoBean demoBean=(DemoBean) context.getBean("demoBean");

       System.out.println("DemoBean="+demoBean);

       DemoDAO demoDAOAn01=(DemoDAO) context.getBean("demoDAO");

       System.out.println("DemoBean="+demoDAOAn01);

       DemoService demoServiceAn01=(DemoService) context.getBean("demoService");

       System.out.println("DemoBean="+demoServiceAn01);

       ((ConfigurableApplicationContext) context).close();

    }

}