• IOC初始化销毁的2种实现方式


    IOC初始化销毁的2种实现方式

    1、bean内调用init-method 和destroy-method

    2、通过注解实现@PostConstruct 和@PreDestroy

    -----------------------------bean内调用init-method 和destroy-method------------------------

    1、创建IOrderDao

    package com.longteng.lesson2.dao;
    
    public interface IOrderDao {
        public String bookOrder(String name);
    }

     2、创建IOrderDao的实体 OrderDao

     
    package com.longteng.lesson2.dao.impl;
    
    import com.longteng.lesson2.dao.IOrderDao;
    
    public class OrderDao implements IOrderDao {
        @Override
        public String bookOrder(String name) {
            return name+"预订了订单";
        }
    }
     

    3、创建OrderService

     
    package com.longteng.lesson2.service;
    import com.longteng.lesson2.dao.IOrderDao;

    public class OrderService {
    private String orderSkuName;
    public OrderService(String orderSkuName){
    this.orderSkuName = orderSkuName;
    }

    public void setOrderSkuName(String orderSkuName) {
    this.orderSkuName = orderSkuName;
    }

    public String getOrderSkuName() {
    return orderSkuName;
    }

    public void setiOrderDao(IOrderDao iOrderDao) {
    this.iOrderDao = iOrderDao;
    }

    IOrderDao iOrderDao;

    public String getOrderInfo(String name){
    return iOrderDao.bookOrder(name);
    }
    public void initTest(){
    System.out.println("初始化调用方法");
    }
    public void tearDownTest(){
    System.out.println("回收调用方法");
    }
    }
     

    4、 创建order.xml文件

     
    <?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="orderDao" class="com.longteng.lesson2.dao.impl.OrderDao"></bean>
    <bean id="orderService" class="com.longteng.lesson2.service.OrderService" init-method="initTest" destroy-method="tearDownTest" >
    <constructor-arg name="orderSkuName" value="123456789"></constructor-arg>
    <property name="iOrderDao" ref="orderDao"></property>
    </bean>
    </beans>
     

    5、创建测试类

     
    package com.longteng.lesson2.dao;
    
    import com.longteng.lesson2.service.OrderService;
    import org.junit.Assert;
    import org.junit.Before;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class OrderDaoTest {
        ApplicationContext context;
        @Before
        public void initApplication(){
            context = new ClassPathXmlApplicationContext("order.xml");
        }
        @Test
        public void test(){
            OrderService orderService = context.getBean("orderService", OrderService.class);
            System.out.println(orderService.getOrderInfo("zhou"));
            System.out.println(orderService.getOrderSkuName());
            Assert.assertEquals("成功了","zhou预订了订单",orderService.getOrderInfo("zhou"));
        }
    }
     

     6、测试结果

    13:53:43.096 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Invoking init method  'initTest' on bean with name 'orderService'
    初始化调用方法
    13:53:43.097 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Finished creating instance of bean 'orderService'
    13:53:43.098 [main] DEBUG org.springframework.context.support.ClassPathXmlApplicationContext - Unable to locate LifecycleProcessor with name 'lifecycleProcessor': using default [org.springframework.context.support.DefaultLifecycleProcessor@d7f7e0]
    13:53:43.099 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'lifecycleProcessor'
    13:53:43.101 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Could not find key 'spring.liveBeansView.mbeanDomain' in any property source
    13:53:43.103 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'orderService'
    zhou预订了订单
    123456789

    --------------------------------------方式2通过注解方式实现----------------------------------

    1、创建IOrderDao

    package com.longteng.lesson2.dao;
    
    public interface IOrderDao {
        public String bookOrder(String name);
    }

     2、创建IOrderDao的实体 OrderDao

    package com.longteng.lesson2.dao.impl;
    
    import com.longteng.lesson2.dao.IOrderDao;
    import org.springframework.stereotype.Repository;
    
    @Repository
    public class OrderDao implements IOrderDao {
        @Override
        public String bookOrder(String name) {
            return name+"预订了订单";
        }
    }

    3、创建OrderService

    package com.longteng.lesson2.service;
    import com.longteng.lesson2.dao.IOrderDao;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import javax.annotation.PostConstruct;
    import javax.annotation.PreDestroy;
    
    @Service
    public class OrderService {
    
        @Autowired
        IOrderDao iOrderDao;
    
        public String  getOrderInfo(String name){
           return iOrderDao.bookOrder(name);
        }
        @PostConstruct
        public void initTest(){
            System.out.println("初始化调用方法");
        }
        @PreDestroy
        public void tearDownTest(){
            System.out.println("回收调用方法");
        }
    }

    4、创建Order配置类

    package com.longteng.lesson2.config;
    
    import com.longteng.lesson2.service.OrderService;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;
    
    @Configuration
    @ComponentScan(basePackages = {"com.longteng.lesson2.dao","com.longteng.lesson2.service"})
    public class OrderCfg {
    
        @Bean
        public OrderService getOrderService(){
            return new OrderService();
        }
    }

    5、创建测试类

    package com.longteng.lesson2.dao;
    
    import com.longteng.lesson2.config.OrderCfg;
    import com.longteng.lesson2.service.OrderService;
    import org.junit.Assert;
    import org.junit.Before;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.annotation.AnnotationConfigApplicationContext;
    
    public class OrderDaoTest {
        ApplicationContext context;
        @Before
        public void initApplication(){
            context = new AnnotationConfigApplicationContext(OrderCfg.class);
        }
        @Test
        public void test(){
            OrderService orderService = context.getBean("orderService", OrderService.class);
            System.out.println(orderService.getOrderInfo("zhou"));
            Assert.assertEquals("成功了","zhou预订了订单",orderService.getOrderInfo("zhou"));
        }
    }

    6、测试结果

    14:03:10.423 [main] DEBUG org.springframework.context.annotation.CommonAnnotationBeanPostProcessor - Invoking init method on bean 'getOrderService': public void com.longteng.lesson2.service.OrderService.initTest()
    初始化调用方法
    14:03:10.423 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Finished creating instance of bean 'getOrderService'
    14:03:10.423 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory'
    14:03:10.444 [main] DEBUG org.springframework.context.annotation.AnnotationConfigApplicationContext - Unable to locate LifecycleProcessor with name 'lifecycleProcessor': using default [org.springframework.context.support.DefaultLifecycleProcessor@e31a9a]
    14:03:10.444 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'lifecycleProcessor'
    14:03:10.447 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Could not find key 'spring.liveBeansView.mbeanDomain' in any property source
    14:03:10.449 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'orderService'
    zhou预订了订单
    
    Process finished with exit code 0
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  • 原文地址:https://www.cnblogs.com/zhou-test/p/ioc.html
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