actionresult

问题 Here is my struts.xml <package name="ajax" extends="json-default" > <action name="loadcity" method="loadcity" class="roseindia.action.user.RegisterUser" > <result type="json" /> </action> </package> When I am calling loadcity.action I am getting following error No result defined for action roseindia.action.user.RegisterUser and result input Here is my action method: public String loadcity() { country=request.getParameter("country"); cityList= dao.loadcity(country); return ActionSupport

问题 I am trying to use the Struts2 jquery plugin for ajax requests on some of my forms, but I am having an issue with the response to the page. The struts action is validated and executed properly, but when jquery gets a response, it sets the response as the HTML of the entire page... It is putting the response in the correct place, but it is not responding with the right thing at all... Here is the jsp form: <%@ tag language="java" pageEncoding="UTF-8"%> <%@ taglib uri='http://java.sun.com/jsp

问题 In a Struts 2 application when user inserts an URL which is not related with any of your actions a java.lang.NullPointerException arises in these cases I want to display a nice screen so I have added in my struts.xml <global-exception-mappings> <exception-mapping exception="java.lang.NullPointerException" result="exception"/> </global-exception-mappings> <global-results> <result name="exception">/WEB-INF/jsp/exception.jsp</result> </global-results> but it doesn't work. I also have tried

问题 I have a bit of code that makes a file available and prompts user to open/download/cancel . I would like to take an action if the file is opened or downloaded , but not if canceled . This is the download line, from the controller : return File(fileAsBytes, System.Net.Mime.MediaTypeNames.Application.Octet, fileName); I guess my question is, how do I capture a return value from this action? Would I see the result in the controller or in the view that calls it? I'm a struggling newbie. Don't

问题 I am getting the JSON Exception error when I am executing the result into the browser like the following: type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.ProductDetails.ISN, no session or

问题 I may encounter situations, when I need to just return bad request result. For example, there is a call to MVC 3 site's controllers action, but the required parameter is missing in a request uri. What do I return in response. I know I can do this: Response.StatusCode = (int)HttpStatusCode.BadRequest; return Content(string.Empty); Is this the correct way for the above described situation? 回答1: Your solution will work OK, but more clear way will be using HttpStatusCodeResult class, like this:

问题 Ok so this is the basic setup; A user logins I get the unique ID of that user myid , I then try to get a list of that logged in user friends by going into the friends table which is shown in the variable myfriends notice that I have only selected the friendID column which represents the uniqueID of a friend. I then compare the myid to the profileID which should match if they're friends. The problem is that I am using a . tolist() on the myfriends variable and I can't seem to extract the

问题 Ok so this is the basic setup; A user logins I get the unique ID of that user myid , I then try to get a list of that logged in user friends by going into the friends table which is shown in the variable myfriends notice that I have only selected the friendID column which represents the uniqueID of a friend. I then compare the myid to the profileID which should match if they're friends. The problem is that I am using a . tolist() on the myfriends variable and I can't seem to extract the

问题 Problem so simple, if the action name is "apply" this action doesn't work at all, and it gave the HTTP Status 404 - No result defined for action com.control.actions.ClassName and result success example of the struts.xml : <action name="apply" method="display" class="com.control.actions.ClassName"> <result name="none">/page.jsp</result> </action> but it works if the action name is anything else like: <action name="applying" method="display" class="com.control.actions.ClassName"> <result name=

问题 I have a website using Struts2 as the MVC framework. I need to re-skin the JSPs. I need to have the old JSPs accessible alongside the new JSPs. So I have added a root folder of /newdesign/ and copied all of the existing JSP folders into it. So if I login with the name/value pair ?newdesign=true (for example) I'm the initial request then I can: store this in the user's session and then dynamically add /newdesign/ as a global prefix to the tag in struts.xml that determines if the new or old JSP