SpringMVC配置拦截器实现登录控制的方法

<c:if test="${sessionScope.login == null || sessionScope.login == false}"> <!-- 未登录 --> <c:redirect url="/login"/></c:if><c:if test="${sessionScope.login}"> <!-- 已登录 --></c:if>

<!-- <mvc:mapping path="/**" /> 如果只写一个*，则不能拦截类似/*/*的请求。静态资源的请求需要判断不进行拦截 --><mvc:interceptors> <mvc:interceptor>  <mvc:mapping path="/**" />  <bean class="com.ts.settle.tools.interceptor.LoginInterceptor">   <property name="excludedUrls">    <list>     <value>/login</value>     <value>/static/</value>    </list>   </property>  </bean> </mvc:interceptor></mvc:interceptors>

public class LoginInterceptor implements HandlerInterceptor { private AvatarLogger logger = AvatarLoggerFactory.getLogger(this.getClass()); private List<String> excludedUrls; /**  * 在DispatcherServlet完全处理完请求后被调用  * 当拦截器抛出异常时,依然会从当前拦截器往回执行所的拦截器的afterCompletion()  */ public void afterCompletion(HttpServletRequest request,        HttpServletResponse response, Object handler, Exception exception)   throws Exception { } //在业务处理器处理请求执行完成后,生成视图之前执行的动作 public void postHandle(HttpServletRequest request, HttpServletResponse response,       Object handler, ModelAndView modelAndView) throws Exception { } /**  * 在业务处理器处理请求之前被调用  * 如果返回false 则退出本拦截器，本拦截器后面的postHandle与afterCompletion不再执行  */ public boolean preHandle(HttpServletRequest request, HttpServletResponse response,        Object handler) throws Exception {  String requestUri = request.getRequestURI();  for (String url : excludedUrls) {   if (requestUri.contains(url)) {    return true;   }  }  HttpSession session = request.getSession();  Boolean login = (Boolean) session.getAttribute("login");  if (login == null || !login) {   //System.out.println(request.getContextPath());   logger.info("Pedirect to login page");   response.sendRedirect(request.getContextPath() + "/login");  }  return true; } public void setExcludedUrls(List<String> excludedUrls) {  this.excludedUrls = excludedUrls; }}