jstl

Check if parameter exists in Expression Language [duplicate]

由 ╄→尐↘猪︶ㄣ 提交于 2019-12-20 09:12:45
问题 This question already has answers here : Evaluate empty or null JSTL c tags (8 answers) Closed 3 years ago . <c:if test="${param.username}" > </c:if> How do I check if param.username exists?? 回答1: Use the not empty check. <c:if test="${not empty param.username}" > </c:if> Edit: If you have a parameter of the form ?username (no value), it is safer to use ${param.username ne null} 回答2: If you want to check if parameter exists, just test if it is not null, in your case: <c:if test="${param

What are JSTL mandatory Jars

由 為{幸葍}努か 提交于 2019-12-20 07:39:30
问题 I am new, and just start learning Java. From the jstl tag, I know a lot about jstl. I use IDE(eclispe mars) to create a dynamic web project by adding a simple jsp page, then export the war to the tomcat7's webapps folder. I do some testings of the dependence of jstl mandatory jars. My core project files are: web.xml: <web-app xmlns:xsi="http:....... version="3.0"> //use servlet 3.0 index.jsp: <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri

java.lang.ClassNotFoundException: javax.servlet.jsp.tagext.Tag

由 蹲街弑〆低调 提交于 2019-12-20 06:11:10
问题 I got two errors, one is: Nov 20, 2013 3:42:34 PM org.apache.catalina.core.ApplicationDispatcher invoke SEVERE: Servlet.service() for servlet jsp threw exception java.lang.ClassNotFoundException: javax.servlet.jsp.tagext.Tag at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java

Display a list in a list with a foreach in jsp

由 江枫思渺然 提交于 2019-12-20 05:58:21
问题 Is it possible to display the elements of a list in a list with a foreach in a jsp? List<List<String>> elements; i was thinking something like : <c:forEach var="charge" items="${customerOfferForm.offersWithCharges.get(0)}"> 回答1: Your syntax will work in EL 2.2 (which is available since Servlet 3.0 containers such as Tomcat 7, Glassfish 3, etc), but not in older versions. You can then use the brace notation [] to get the desired list item by index. <c:forEach items="${customerOfferForm

JSP can't find stylesheet

由 家住魔仙堡 提交于 2019-12-20 04:54:28
问题 Hierarchy: WEB-INF/jsp WEB-INF/styles I link stylesheet in my JSP file, which is located in WEB-INF/jsp: <link rel="stylesheet" type="text/css" href="../styles/reset.css" /> But it doesn't work! When i open my application there is no styles, and writter by Tomcat: <html><head><title>Apache Tomcat/7.0.14 - Error report</title><style><!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background

java.lang.NoSuchMethodError:javax.servlet.jsp.PageContext.getELContext()Ljavax/el/ELContex

由 谁说我不能喝 提交于 2019-12-20 04:12:56
问题 i have this code which is not working. <jsp:useBean id="abbreviationlist" class="AbbreviationListType"/> <jsp:setProperty name="abbreviationlist" property="id"/> <table> <c:forEach items="${abbreviationlist.list}" var="abbreviation"> </c:forEach> </table> and i have the class AbbreviationListType with set and get methods for the list- get singnature is = public List<AbbreviationType> getList() can someone please point out what i am doing wrong ? cause this doesnt work and i get this stack

Error using JSTL XML taglib - attribute xml does not accept any expressions

由 我的梦境 提交于 2019-12-20 04:11:45
问题 I'm getting the following error when I try to use the JSTL XML taglib: /server-side-transform.jsp(51,0) According to TLD or attribute directive in tag file, attribute xml does not accept any expressions I'm looking into the tlds etc, but if anyone knows what this is an can save me some time, it'd be appreciated! If it helps, I get this error running the example code <c:set var="xml"> <paragraph> This document uses <bold>unusual</bold> markup, which we want to replace with <bold>HTML</bold>. <

How to show multiple tables depending on key in the Map using JSTL?

由 孤街醉人 提交于 2019-12-20 03:32:21
问题 I have a Map of String and List of Object which contains each datacenter and its machine. And I am currently passing this object to JSP from my Controller and then I am iterating it in JSP page to show the data. If the Map size is one, then I am able to show the data in a JSP page and it works fine. Now suppose if the Map size is two, then I would like to show two tables one for each key in the map. This is what I am not able to make work. Maximum size of map can be 3 for my use case. Below

How to include a controller from jsp page

由 自作多情 提交于 2019-12-20 03:09:02
问题 I'm using Spring MVC. I want to include menu page (named menu.jsp) with a controller (named MenuController) to my main page. If I call http://localhost:8080/myWeb/menu.htm everything is fine. But I try include menu into my main page like this : <c:import url="menu.jsp"></c:import> Or <c:import url="menu.htm"></c:import> it shows nothing This is config in dispatcher-servlet.xml file: <mvc:annotation-driven /> <context:component-scan base-package="controllers" /> <bean id="viewResolver" class=

How to include a controller from jsp page

由 六月ゝ 毕业季﹏ 提交于 2019-12-20 03:08:41
问题 I'm using Spring MVC. I want to include menu page (named menu.jsp) with a controller (named MenuController) to my main page. If I call http://localhost:8080/myWeb/menu.htm everything is fine. But I try include menu into my main page like this : <c:import url="menu.jsp"></c:import> Or <c:import url="menu.htm"></c:import> it shows nothing This is config in dispatcher-servlet.xml file: <mvc:annotation-driven /> <context:component-scan base-package="controllers" /> <bean id="viewResolver" class=
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