打印spring加载的bean信息

在启动应用程序的时或是调试时如果能够打印出spring管理的bean的信息，那么对于调试来说有很大的帮助，以下配置可以在spring创建一个bean之后打印出bean的消息，方便调试

public class InstantiationTracingBeanPostProcessor implements BeanPostProcessor {// simply return the instantiated bean as-ispublic Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {return bean; // we could potentially return any object reference here…}//在创建bean后输出bean的信息public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {// System.out.println("Bean ‘" + beanName + "’ created : " + bean.toString());if (bean instanceof ServletDispatcherResult){ServletDispatcherResult result = (ServletDispatcherResult) bean;}return bean;}}

在配置文件中

<?xml version="1.0" encoding="UTF-8"?><beans xmlns=""xmlns:xsi=""xmlns:lang=""xsi:schemaLocation=" http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://www.springframework.org/schema/lang/spring-lang-2.0.xsd"><!–when the above bean (‘messenger’) is instantiated, this customBeanPostProcessor implementation will output the fact to the system console–><bean class="test.InstantiationTracingBeanPostProcessor"/></beans>

每次创建bean实例结束之后都会执行继承了BeanPostProcessor 类的postProcessAfterInitialization方法，就可以打印出bean的消息

，勇士面前无险路。