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>