Configuration of the Struts2 interceptor

? Struts2 interceptors can intercept a number of requests, such as users do not log in to access a page, such as the user does not have access to a page, but send access requests, these are to be intercepted, based on these requirements, I studied the Struts2 interceptor.

To use interceptors, you first need to configure them in Struts.xml, with the following configuration files:

                                                                                                                                                       / web-inf/index/login.jsp                                                                           mresult

It is worth noting that the name of the defined interceptor stack and interceptor-stack must be consistent.

Once configured, we need to write a interceptor class to handle requests for user access (allowing access or not, etc.), which is Logininterceptor.java in the class attribute of <interceptor> above:

Logininterceptor {    string intercept (actioninvocation actioninvocation)  Exception {        String name =  Actioninvocation.getinvocationcontext (). GetName ();         (name.equals ())  {            actioninvocation.invoke ();         } {             map session = actioninvocation.getinvocationcontext (). GetSession ();              (session == )  {                 ServerCommonString.;             } {                 string userid =  (String)  session.get ();                 String userPwd =  (String)  session.get ();                 String userType =  (String)  session.get ();                  (userid == | |  userpwd == | |  userType == )  {                     ServerCommonString.;                 } {                      actioninvocation.invoke ();                 }             }        }     }}

It is important to note that this class inherits the Abstractinterceptor class and then overrides the Interceptor () method.

That's about it, that's pretty simple!

Configuration of the Struts2 interceptor