struts

问题 I'm working on struts1.3.8. The JSP page contains scriptlet to iterate the data in the session. Once the user opens the page and not performing any operation till the session expires and then next refreshing it is throwing java.lang.NullPointerException . So how to handle that exception and how to make the session alive? 回答1: You can rely on the existence of a well-known attribute in session. Set this when the session is first created. session.setAttribute("well-known-attribute", "abcd"); In

问题 In my menu.jsp: <s:url id="ajaxTest" value="addCustoInfo"/> <sx:a id="link3" href="%{ajaxTest}" targets="main-content"> Update Content </sx:a> in my struts: <action name="addCustoInfo" method="renderAddCustomerInfo" class="customerInfoAction"> <result name="success">/page/addCustoInfo.jsp</result> <result name="empty">/page/addCustoType.jsp</result> </action> in my CustomerAction: @SuppressWarnings("unchecked") public String renderAddCustomerInfo(){ this.listCustomerType = daoManager

问题 I want to generate a report which includes an excel sheet which is generated from the data from the database . I am using Apache POI HSSF for creating the excel sheet file in the model. Now how to let the user download the file i have created ? 回答1: Just use a servlet. Feed response.getOutputStream() to POI HSSF to write the workbook to. Most important bit is the Content-Disposition response header. If you set it to attachment , then the browser will pop a Save As dialogue. response

问题 I am planning to develop open source java application to work on google app engine as well as normal rdbms system, so please help me in choosing MVC Framework - Struts / Spring MVC ? ORM - JDO / JPA ? I am considering performance as a key factor. 回答1: For app engine you will want a lightweight framework, both for persistance and application stuff. Google is changing their pricing model so you might want to consider how this will impact your plans as well. There is an interesting discussion on

问题 From ha.ckers.org/xss.html: IMG Embedded commands - this works when the webpage where this is injected (like a web-board) is behind password protection and that password protection works with other commands on the same domain. This can be used to delete users, add users (if the user who visits the page is an administrator), send credentials elsewhere, etc.... This is one of the lesser used but more useful XSS vectors: <IMG SRC="http://www.thesiteyouareon.com/somecommand.php?somevariables

问题 I am having an urgent requirement. Reading data from excel sheet. Is there any procedure to read data from excel sheet without using apache poi api. i have to use only struts. Thanking you, Vipul Kumar. 回答1: What do you mean you "only have to use Struts"? If that means you cannot use any other library (and I hope it doesn't), you only have one way: implement an Excel parser yourself. I strongly advise you against it, though. Why would you want to reinvent the wheel? If not, then there are a

问题 I'm using the struts validator for a jsp validation and i want to know how can I define a field validation depending on the value of another field of my jsp. I have a list of elements like this one : <s:select name="varName" label="labelVariable" list="listeVariable" listValue="varValue" listKey="varKey"/> And a textfield like this one : <s:textfield name="varNameText" label="labelText"/> In my validator I want to validate the size of the field 'varNameText' depending on the selected value on

问题 im using Struts 1.2.x and Ibatis 2.x version for development, so i finish yesterday and now i want to perform test this is my first time trying to work with JUnit, I already make test but in JavaApp not running on server, so how can I simulate or generate mocks with server behavior, and wich mocks are recommended for Struts and Ibatis built-in Environment? for example how can i set accerts for login screen? I know about StrutsTestCase im using it, and about Cactus are for containers and

问题 I have a Struts 2 project with following directory structure. But when I try to run this project using Eclipse on Tomcat 7, it gives me 404 error. Struts.xml : <?xml version="1.0" encoding="UTF-8"?> <struts> <action name="login" class="com.actions.LoginAction" method="execute"> <result name="success">/jsp/login.jsp</result> </action> </struts> login.jsp : <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Login Page</title> </head> <body> <s:form

问题 I have an autocompleter tag in Struts 2. I have certain operations to be done when the tag is placed on the autocompleter.... On focus, when I click the autocompleter textbox, the text Select or Type tag ends with ; will be removed. If I process some other event, the text should reappear. How to achieve this functionality ? <sj:autocompleter cssStyle="width:200px;" href="%{#autoCompleteTagUrl}" onSelectTopics="tagsAllSelectTopics" onCompleteTopics="tagsAllCompleteTopics" id="tags_all" name=