struts2-interceptors

问题 I am new to Struts 2. I am studying it from the book Struts2 In Action. I am having difficulty in understanding some concepts in OGNL which are as follows- We know that params interceptor moves the data from the request parameters to the action object in ValueStack . Now while reading, I came upon a line that says- "The tricky part of the job is mapping the name of the parameter to an actual property on the ValueStack . This is where OGNL comes in. The params interceptor interprets the

问题 I have been trying to make a java project. Its using Struts 2 tags. There is a button Update whenever it is to be clicked, it should update the values in the database. But I am getting this error: No result defined for action com.comviva.im.ui.action.sysadmin.CUGAction and result input 回答1: No result defined for action com.comviva.im.ui.action.sysadmin.CUGAction and result input This means that you are lacking the mapping for the input result for this Action in your Struts.xml The standard

问题 <%@taglib uri="/struts-tags" prefix="s"%> </s:form> <br> <b>Interceptor test</b> <s:form action="simple"> <s:textfield name="message" label="message"/> <s:submit value="submit"/> </s:form> Action file: package action; public class Simple { String message,Status="action is not invoked"; public String execute() throws Exception { Status="action is invoked"; return "Success"; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; }

问题 My interceptor ( validation ) is not getting called before or after the action. Any ideas how to get it work ? Note : Everytime the default interceptor is being called. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <package name="default" namespace="/" extends="struts-default,json-default"> <result-types> <result-type name="tiles" class="org.apache

问题 I have this very-2 strange mapping issue. All fields names like amount, newCase, status etc. are reaching perfectly to the struts Action but none of the single-letter camelCase fields are reaching the action. All are null. For e.g. public String callback() { System.out.println("nCase : " + nCase); System.out.println("Amount : " + amount); System.out.println("fAmount==============" + fAmount); System.out.println("fFee==============" + fFee); System.out.println("sStatus==============" + sStatus

问题 I am trying to set my first Struts 2 application using Eclipse. when i try to run the application on tomcat server 8 i'm getting this exception SEVERE: Exception starting filter struts2 java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157) at org.apache

问题 I use Struts2.x and I know that Struts creates the declared bean objects in the action based on the request so that it is available to the action. I have been researching to understand which interceptors/classes does Struts use internally to create the bean object. I am trying to understand the logic that is used internally for creation of the bean objects. Does it use PropertyUtils to populate properties for the beans or some other way? Any suggestion or pointers for reading will be helpful.

问题 If I understand, the Struts2 interceptor stack correctly, the workflow interceptor looks to see if any validation failures have been reported by the validation interceptor. If it finds that there have been validation failures, it returns ( by default ) Action.INPUT If this is the case, what happens if the Action that is being executed does not have an INPUT result defined in its struts.xml configuration? 回答1: If it returns INPUT, and there is no result defined for that (and no general result)

问题 I have used interceptors to Authentication to my app.I have added it into the defaultStackHibernate Its working fine & I am getting the desired results, the only issue is that now I want to show the username on the header of every page. I have try this <s:property value="name"></s:property> but is work only for the welcome page.So is there a way I can send some variable like username from the interceptor to every action I am invoking or directly to the jsp? if I access to others action I get

问题 I have tried adding action errors in the Action class and printing them on the JSP page. When an exception occurred, it is going into the catch block and it is printing "Error in inserting the Exception, Contact the Admin", in console. In the catch block, I've added it with addActionError() , and I've tried printing it in jsp page... but the message is not shown in jsp page . What I may be missing or doing wrong ? Struts mapping: <action name="dataUpdate" class="foo.bar.myAction" method=