Spring MVC 登錄攔截器

1.編寫攔截器

package interceptor;import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import java.io.IOException;/*** @Description 登錄攔截器* @Author zhaohuaqing*/ public class LoginInterceptor implements HandlerInterceptor {@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws IOException {HttpSession session = request.getSession();Object username = session.getAttribute("username");String path = request.getServletPath();//不需要過濾的urlString[] urls = {"/login","/logOut","/index","/json",".js",".css",".ico",".jpg",".png"};// flag是登錄成功標志boolean flag = false;for (String url : urls) {if (path.endsWith(url) && !path.endsWith(".jsp") || path.endsWith("login.jsp")){flag = true;break;}}if (!flag){if (username != null) {return true;}else {response.sendRedirect("/index");return false;}}else {return true;}}@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {}@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex){} }

2.Spring MVC 配置

<!-- 登錄攔截器--><mvc:interceptors><mvc:interceptor><mvc:mapping path="/**"/><bean class="com.interceptor.LoginInterceptor" /></mvc:interceptor></mvc:interceptors>

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