标签：new cep throw cat void tms ESS sys 测试
前言：在前几篇查漏补缺中，其实我们已经涉及到bean生命周期了，本篇内容进行详细分析。
首先看bean实例化过程：
分析：
bean实例化开始后
注意：Spring是不会主动去调用销毁方法，必须我们主动告知Spring容器。
1 public class BeanLifeCycle implements BeanNameAware, BeanClassLoaderAware, BeanFactoryAware, InitializingBean, DisposableBean { 2 3 private String msg; 4 5 public BeanLifeCycle() { 6 System.out.println("调用构造函数:BeanLifeCycle()"); 7 } 8 9 public String getMsg() { 10 return msg; 11 } 12 13 public void setMsg(String msg) { 14 System.out.println("属性注入:setMsg"); 15 this.msg = msg; 16 } 17 18 @Override 19 public void setBeanName(String name) { 20 System.out.println("BeanNameAware#setBeanName 被调用"); 21 } 22 23 @Override 24 public void setBeanClassLoader(ClassLoader classLoader) { 25 System.out.println("BeanClassLoaderAware#setBeanClassLoader 被调用"); 26 } 27 28 @Override 29 public void setBeanFactory(BeanFactory beanFactory) throws BeansException { 30 System.out.println("BeanFactoryAware#setBeanFactory 被调用"); 31 32 } 33 34 @Override 35 public void afterPropertiesSet() throws Exception { 36 System.out.println("InitializingBean#afterPropertiesSet 被调用，并对msg属性进行修改"); 37 this.msg = "InitializingBean#afterPropertiesSet方法对msg属性进行修改"; 38 } 39 40 @Override 41 public void destroy() throws Exception { 42 System.out.println("DisposableBean#destroy 被调用"); 43 } 44 45 public void initMethod() { 46 System.out.println("init-method 被调用，并对msg属性进行修改，调用顺序在InitializingBean之后"); 47 this.msg = "init-method方法对msg属性进行修改"; 48 } 49 50 public void destroyMethod() { 51 System.out.println("destroy-method 被调用，调用顺序在DisposableBean之后"); 52 } 53 }
上述为主测试类，另外为了测试BeanPostProcessor，我们还需增加如下测试类：
1 public class BeanLifeCycleBeanPostProcessor implements BeanPostProcessor { 2 3 @Override 4 public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException { 5 System.out.println("beanName=" + beanName + " 初始化之前调用:BeanPostProcessor#postProcessBeforeInitialization!!!!!"); 6 return bean; 7 } 8 9 @Override 10 public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException { 11 System.out.println("beanName=" + beanName + " 初始化之后调用:BeanPostProcessor#postProcessAfterInitialization!!!!!"); 12 return bean; 13 } 14 }
具体配置如下：
1 <bean id="beanLifeCycle" class="com.dev.basebean.lifecycle.BeanLifeCycle" 2 init-method="initMethod" destroy-method="destroyMethod" p:msg="属性注入"/> 3 <bean id="beanLifeCycleBeanPostProcessor" class="com.dev.basebean.lifecycle.BeanLifeCycleBeanPostProcessor"/>
测试代码：
1 @Test 2 public void beanLifeCycleTest() { 3 ApplicationContext context = new ClassPathXmlApplicationContext("classpath*:com/dev/config/lifecycle/lifecycle.xml"); 4 BeanLifeCycle beanLifeCycle = context.getBean(BeanLifeCycle.class); 5 System.out.println("msg=" + beanLifeCycle.getMsg()); 6 ((ClassPathXmlApplicationContext) context).close(); 7 }
运行结果如下：
通过以上运行结果，我们可知Bean的生命周期，总结如下：
至此bean的生命周期结束，该bean完成了其伟大的一生。
by Shawn Chen，2019.05.05，下午。
标签：new cep throw cat void tms ESS sys 测试
原文地址：https://www.cnblogs.com/developer_chan/p/10813269.html
