springBean的生命周期

2021-07-16 16:06

阅读：819

标签：nts conf on() http enc .com 1.0 contex invoke

1、Person接口

1 package com.xiaostudy.service;
2 
3 public interface Person {
4     
5     public void print();
6 }

2、Person的实现类PersonImple.java

 1 package com.xiaostudy.service;
 2 
 3 import org.springframework.beans.BeansException;
 4 import org.springframework.beans.factory.BeanFactory;
 5 import org.springframework.beans.factory.BeanFactoryAware;
 6 import org.springframework.beans.factory.BeanNameAware;
 7 import org.springframework.beans.factory.InitializingBean;
 8 import org.springframework.context.ApplicationContext;
 9 import org.springframework.context.ApplicationContextAware;
10 
11 public class PersonImple implements Person, BeanNameAware, BeanFactoryAware, ApplicationContextAware, 
12 InitializingBean {
13     private String name;
14     
15     public PersonImple() {
16         System.out.println("第一步：person初始化>>>>>>>>>>>>>>");
17     }
18     
19     public void setName(String name) {
20         System.out.println("第二步：name赋值>>>>>>>>>");
21         this.name = name;
22     }
23     
24     public String getName() {
25         return name;
26     }
27 
28     @Override
29     public void setBeanName(String beanName) {
30         System.out.println("第三步：beanName=" + beanName + "||||||||||");
31     }
32 
33     @Override
34     public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
35         System.out.println("第四步：beanFactory=" + beanFactory + "||||||||||");
36     }
37 
38     @Override
39     public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
40         System.out.println("第五步：applicationContext=" + applicationContext + "||||||||||");
41     }
42 
43     @Override
44     public void afterPropertiesSet() throws Exception {
45         System.out.println("第七步：afterPropertiesSet()||||||||||");
46     }
47     
48     //跟生成代理冲突
49     public void init() {
50         System.out.println("第八步：init()||||||||||");
51     }
52     
53     //这是实现Person接口的方法实现
54     public void print() {
55         System.out.println("第十步：PersonImple.print()>>>>>>>>>>>>>>");
56     }
57     
58     public void destroy() {
59         System.out.println("第十一步：destroy()");
60     }
61     
62 }

3、实现BeanPostProcessor接口的MyBeanPostProcessor类

 1 package com.xiaostudy.service;
 2 
 3 import org.springframework.beans.BeansException;
 4 import org.springframework.beans.factory.config.BeanPostProcessor;
 5 
 6 public class MyBeanPostProcessor implements BeanPostProcessor {
 7 
 8     @Override
 9     public Object postProcessBeforeInitialization(final Object bean, String beanName) throws BeansException {
10         // TODO Auto-generated method stub
11         System.out.println("第六步：postProcessBeforeInitialization()方法调用。。。第一个参数bean=" + bean + 
12                             "；第二个参数beanName=" + beanName);
13         //跟init-method冲突
14         /*if(beanName.equals("person")) {
15             // 生成代理
16             return Proxy.newProxyInstance(MyBeanPostProcessor.class.getClassLoader(), bean.getClass().getInterfaces(),
17                     new InvocationHandler() {
18                 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
19                     System.out.println("开始事务>>>>>>>>");
20                     Object obj = method.invoke(bean, args);
21                     System.out.println("关闭事务22                     return obj;
23                 }
24             });
25         }*/
26         return bean;
27     }
28 
29     @Override
30     public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
31         // TODO Auto-generated method stub
32         System.out.println("第九步：postProcessAfterInitialization()方法调用。。。第一个参数arg0=" + bean + 
33                             "；第二个参数arg1=" + beanName);
34         return bean;
35     }
36 
37 }

4、测试类Test1.java

 1 package com.xiaostudy.test;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.AbstractApplicationContext;
 5 import org.springframework.context.support.ClassPathXmlApplicationContext;
 6 
 7 import com.xiaostudy.service.Person;
 8 
 9 public class Test1 {
10 
11     public static void main(String[] args) {
12         ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
13         Person person = ac.getBean("person", Person.class);
14         person.print();
15         ((AbstractApplicationContext) ac).close();
16     }
17 
18 }

5、spring的配置文件applicationContext.xml

 1 xml version="1.0" encoding="UTF-8"?>
 2 beans xmlns="http://www.springframework.org/schema/beans"
 3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4        xsi:schemaLocation="http://www.springframework.org/schema/beans 
 5                               http://www.springframework.org/schema/beans/spring-beans.xsd">
 6 
 7     bean id="person" init-method="init" destroy-method="destroy" class="com.xiaostudy.service.PersonImple">
 8         property name="name" value="xiaostudy">property>
 9     bean>
10     bean id="beanPostProcessor" class="com.xiaostudy.service.MyBeanPostProcessor">bean>
11 beans>