springMVC—拦截器的实现登录控制

springMVC——拦截器的实现登录控制

拦截器配置文件如下

<!-- <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="包名.LoginInterceptor">   <property name="excludedUrls">    <list>     <value>/login</value>     <value>/static/</value>    </list>   </property>  </bean> </mvc:interceptor></mvc:interceptors>

java代码：

public class HandlerInterceptor1 extends HandlerInterceptorAdapter { private AvatarLogger logger = AvatarLoggerFactory.getLogger(this.getClass());  private List<String> excludedUrls;  /**  * 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; }}