请求执行如下图:
需求:拦截未登录的用户访问订单模块。
1.新建LoginInterceptor实现HandlerInterceptor接口(org.springframework.web.servlet.HandlerInterceptor)
package com.kye.Interceptors; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import com.kye.java.User; import com.kye.utils.Utils; public class LoginInterceptor implements HandlerInterceptor { public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { String token = request.getParameter("token"); User user = Utils.getUserByToken(token); if (user == null) { response.sendRedirect("/unlogin"); return false; } return false; } public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { // TODO Auto-generated method stub } public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { // TODO Auto-generated method stub } }
2.在springmvc.xml中配置
<mvc:interceptors> <mvc:interceptor> <mvc:mapping path="/order/*" /> <bean class="com.kye.Interceptors.LoginInterceptor"></bean> </mvc:interceptor> </mvc:interceptors>