Spring mvc 拦截器

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拦截器概念和struts2拦截器概念一致：

mvc.xml配置拦截器

<!-- spring容器扫描指定包下的所有类，如果类上有注解  那么根据注解产生相应bean对象已经映射信息 --><context:component-scan base-package="controller"/><mvc:interceptors><mvc:interceptor><!-- /**表示改路径下的所有路径及其子路径 --><mvc:mapping path="/**"/><bean class="interceptor.MyInterceptor"></bean></mvc:interceptor></mvc:interceptors>

controllor

@RequestMapping("/interceptor")public String interceptor(){System.out.println("hello interceptor");return "index.jsp";}

interceptor

实现HandlerInterceptor接口

package interceptor;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;public class MyInterceptor implements HandlerInterceptor {@Overridepublic void afterCompletion(HttpServletRequest arg0,HttpServletResponse arg1, Object arg2, Exception arg3)throws Exception {// TODO Auto-generated method stub}@Overridepublic void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,Object arg2, ModelAndView arg3) throws Exception {// TODO Auto-generated method stubSystem.out.println("处理后");}@Overridepublic boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,Object arg2) throws Exception {// TODO Auto-generated method stubSystem.out.println("处理前");return true;}}

运行

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