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

  • 2020-05-27 05:34:10
  • OfStack

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.

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