新建一个类继承extends HandlerInterceptorAdapter
重写方法
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception{
里面写要拦截的代码
}
然后在spring-mvc.xml中配置(下面是个例子)
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="拦截的地址如:/index/**" />
<bean class="com.*.*.interceptor.RequestInterceptor" />
</mvc:interceptor>
</mvc:interceptors>