Java

springmvc controls users to jump to the login page when session fails

springmvc controls the login user session to jump to the login page after the failure of session. The details are as follows:

Step 1, configure web.xml

 <session-config>
  <session-timeout>15</session-timeout>
 </session-config>

Step 2, configure spring-mvc.xml

<!-- Session The failure to intercept  -->
  <mvc:interceptors>
    <!--  Define interceptors  -->
     <mvc:interceptor>
        <!--  Matching is url Path,   If not configured or /**, Will intercept all Controller -->
        <mvc:mapping path="/**" />
        <!--  Addresses that do not need to be intercepted  -->
        <mvc:exclude-mapping path="/login.do" />
        <bean class="com.cm.contract.controller.annotation.GEISSSessionTimeoutInterceptor"></bean>
    </mvc:interceptor>
  </mvc:interceptors>

Step 3, write the interceptor SystemSessionInterceptor method

public class SystemSessionInterceptor implements HandlerInterceptor {
  private static final String LOGIN_URL="/jsp/sessionrun.jsp";
  @Override
  public void postHandle(HttpServletRequest request,
      HttpServletResponse response, Object handler,
      ModelAndView modelAndView) throws Exception {


  }

  @Override
  public void afterCompletion(HttpServletRequest request,
      HttpServletResponse response, Object handler, Exception ex)
      throws Exception {

  }

  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
      Object handler) throws Exception {
    HttpSession session=request.getSession(true);
    //session Get the user name information in
    Object obj = session.getAttribute(CMConstant.LOGINUSER);
    if (obj==null||"".equals(obj.toString())) {
      response.sendRedirect(request.getSession().getServletContext().getContextPath()+LOGIN_URL;
         return false;
      }
      return true;
   }

Step 5: configure the friendly tips page sessionrun.jsp

<body>
  <SCRIPT language="JavaScript">
    alert(" The user has logged in elsewhere, please log in again. ");
    setTimeout(function () {
      window.top.location.href="<%=path%>/index.jsp";
    },2000);
  </script>
  </body>

This is the end of springMvc intercept session post-failure processing.