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Session Check Interceptor

There must be some way to check that the current session is valid or invalid. This can be done using interceptors in struts in a very easy way. Here I am giving an example how to resolve this. First of all we will make an interceptor named SessionCheck.java. package com.demo.interceptors; import java.util.Collections; import java.util.Map; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionInvocation; import com.opensymphony.xwork2.ActionProxy; import com.opensymphony.xwork2.config.entities.ResultConfig; import com.opensymphony.xwork2.interceptor.Interceptor; public class SessionCheck implements Interceptor { public void init() { } public void destroy() { } public String intercept(ActionInvocation invocation) throws Exception { ActionProxy proxy; proxy = invocation.getProxy(); Map session = ActionContext.getContext().getSession(); Map results = proxy.getConfig().getResults(); // We are checking that the user that is set at logi