Spring - Bean管理之生命周期之BeanPostProcessor

packagecom.imooc.ioc.demo3;
publicinterfaceUserDao {
publicvoidfindAll();
publicvoidsave();
publicvoidupdate();
publicvoiddelete();
}
packagecom.imooc.ioc.demo3;
publicclassUserDaoImplimplementsUserDao {
@OverridepublicvoidfindAll() {
System.out.println("查询用户。。。");
    }
@Overridepublicvoidsave() {
System.out.println("保存用户。。。");
    }
@Overridepublicvoidupdate() {
System.out.println("修改用户。。。");
    }
@Overridepublicvoiddelete() {
System.out.println("删除用户。。。");
    }
}

packagecom.imooc.ioc.demo3;
importorg.springframework.beans.BeansException;
importorg.springframework.beans.factory.config.BeanPostProcessor;
importjava.lang.reflect.InvocationHandler;
importjava.lang.reflect.Method;
importjava.lang.reflect.Proxy;
publicclassMyBeanPostProcessorimplementsBeanPostProcessor {
@OverridepublicObjectpostProcessBeforeInitialization(Objectbean, StringbeanName) throwsBeansException {
System.out.println("第五步：初始化前方法...");
returnbean;
    }
@OverridepublicObjectpostProcessAfterInitialization(finalObjectbean, StringbeanName) throwsBeansException {
System.out.println("第八步：初始化后方法...");
if("userDao".equals(beanName)){
Objectproxy=Proxy.newProxyInstance(bean.getClass().getClassLoader(), bean.getClass().getInterfaces(), newInvocationHandler() {
@OverridepublicObjectinvoke(Objectproxy, Methodmethod, Object[] args) throwsThrowable {
if("save".equals(method.getName())){
System.out.println("权限校验===================");
returnmethod.invoke(bean,args);
                    }
returnmethod.invoke(bean,args);
                }
            });
returnproxy;
        }
else{
returnbean;
        }
    }
}

<beanclass="com.imooc.ioc.demo3.MyBeanPostProcessor"/><beanid="userDao"class="com.imooc.ioc.demo3.UserDaoImpl"/>

packagecom.imooc.ioc.demo3;
importorg.junit.Test;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.support.ClassPathXmlApplicationContext;
/*** Bean的作用范围的测试*/publicclassSpringDemo3 {
@Testpublicvoiddemo3(){
ApplicationContextapplicationContext=newClassPathXmlApplicationContext("applicationContext.xml");
UserDaouserDao= (UserDao)applicationContext.getBean("userDao");
userDao.findAll();
userDao.save();
userDao.update();
userDao.delete();
    }
}

运行结果：第五步：初始化前方法...
第八步：初始化后方法...
查询用户。。。权限校验===================保存用户。。。修改用户。。。删除用户。。。