<!-- 拦截器:针对HandlerMapping配置 --> <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"> <property name="interceptors"> <list> <ref bean="myInterceptor1"></ref> <ref bean="myInterceptor2"></ref> </list> </property> </bean> <bean id="myInterceptor1" class="com.interceptor.MyInterceptor1"></bean> <bean id="myInterceptor2" class="com.interceptor.MyInterceptor2"></bean>
时间: 2024-04-17 11:29:41 浏览: 16
这段配置是针对Spring MVC中的拦截器配置。在这里,使用了BeanNameUrlHandlerMapping作为HandlerMapping的实现类,它会将请求的URL与对应的处理器(Controller)进行映射。配置中的两个拦截器(MyInterceptor1和MyInterceptor2)会在处理器执行前后进行拦截操作。通过配置interceptors属性,将这两个拦截器添加到HandlerMapping中,以便在请求被处理之前或之后执行相应的拦截逻辑。
相关问题
<!-- 拦截器:针对HandlerMapping配置 --> <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"> <property name="interceptors"> <list> <ref bean="myInterceptor1"></ref> <ref bean="myInterceptor2"></ref> </list> </property> </bean> <bean id="myInterceptor1" class="com.interceptor.MyInterceptor1"></bean> <bean id="myInterceptor2" class="com.interceptor.MyInterceptor2"></bean>如何实现
要实现拦截器,你需要进行以下步骤:
1. 创建拦截器类:在com.interceptor包下创建MyInterceptor1和MyInterceptor2两个类,它们都需要实现Spring的HandlerInterceptor接口或者继承HandlerInterceptorAdapter类。
2. 实现拦截逻辑:在拦截器类中重写preHandle、postHandle和afterCompletion方法,这些方法分别在请求处理前、处理后和视图渲染后执行。
3. 配置拦截器:在Spring的配置文件中,通过bean标签和class属性创建BeanNameUrlHandlerMapping、myInterceptor1和myInterceptor2的实例。然后,通过property标签和name属性将myInterceptor1和myInterceptor2添加到BeanNameUrlHandlerMapping的interceptors属性中。
完成以上步骤后,拦截器就会在请求处理前后执行相应的拦截逻辑。你可以根据需要在拦截器中编写自定义的业务逻辑,例如身份验证、日志记录等。
You are creating a Web application for the book shop by using Spring MVC. When a user sends a request for theURL, /SearchBook.htm page in this Web application, the request needs to be handled by theSearchBookController class defined in the controller package of the Web application. For this, you used thefollowing code snippet:<beans> <bean id="ControllerHandlerMapping" class=org.springframework.web.servlet.mvcsupport,SimpleUrlHandlerMapping"/><bean class="controller SearchBookController"></beans> However, the preceding code snippet does not forward the request to the SearchBookController class. Analyze theproblem and provide the correct code snippet.
The code snippet provided in the question is incorrect because the `SimpleUrlHandlerMapping` bean is not properly configured to handle the URL mapping for the `SearchBookController`. To correctly map the URL `/SearchBook.htm` to the `SearchBookController`, you should use the following code snippet:
```xml
<beans>
<bean id="handlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/SearchBook.htm">searchBookController</prop>
</props>
</property>
</bean>
<bean id="searchBookController" class="controller.SearchBookController"/>
</beans>
```
In this code snippet, we are using the `SimpleUrlHandlerMapping` bean to map the URL `/SearchBook.htm` to the `searchBookController` bean, which is an instance of the `SearchBookController` class. The `handlerMapping` bean is configured with a `mappings` property that contains a `props` element with a single URL mapping for `/SearchBook.htm`. The `searchBookController` bean is defined as an instance of the `SearchBookController` class and is mapped to the `searchBookController` bean ID. This configuration ensures that requests to the `/SearchBook.htm` URL are handled by the `SearchBookController` class.