el

问题 I use GlassFish 4.1 web profile which as I understand uses EL 3.0. I did everything as was explained here - https://stackoverflow.com/a/3735006/5057736 however my implementation of this solution doesn't work. This is my constant class public class CommonKeys { public static final String TITLE = "SOME_KEY"; } This is how I set attribute: request.setAttribute(CommonKeys.TITLE, "TEST"); This is my jsp: <%@page contentType="text/html" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java

问题 i'm trying to set the filtering and sorting for a column of my datatable dynamically from a managed bean, but i had a problem regarding the value that i should give to those methods, here is the code i tried : /*this is the XHTML that i try to do in Java code : <p:column style="text-align:center;" width="10" id="etatCol" filterBy="#{exam.examen.studyPatientState}" filterOptions="#{examenListBean.etatExamOptions}" filterMatchMode="exact" headerText="Etat" filterStyle="dispo" sortBy="#{exam

问题 I try to pass a parameter into method admin like this: <p:toolbarGroup align="right" rendered="#{loginBean.admin('dataread'}"> <h:form> <p:commandButton value="manage users" ajax="false" icon="ui-icon-document" action="/admin/manageUsers.xhtml?faces-redirect=true"/> </h:form> </p:toolbarGroup> the code in my managed Bean is like that public boolean isAdmin(String role){ FacesContext facesContext = FacesContext.getCurrentInstance(); HttpServletRequest request = (HttpServletRequest)

问题 EL expressions are not evaluated in JBoss AS 4.2.2. I have web.xml declared conform the Servlet 2.4 spec. <web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> What needs to be done more in order to get EL to work in JBoss AS 4.2.2? 回答1: Your web.xml root declaration looks fine. Other causes to exclude: Ensure that

问题 I'm trying to reference constant with EL on my JSF page (https://java.net/projects/el-spec/pages/StaticField), but I'm stuck on this exception: javax.servlet.ServletException: /faces/signup.xhtml @18,85 maxlength="#{signUpBean.USERNAME_MAXLENGTH}": Property 'USERNAME_MAXLENGTH' not found on type com.foo.SignUpBean I'm using Tomcat 8.0.0-RC1 and here is my backing bean and input declaration: Bean: @ManagedBean @RequestScoped public class SignUpBean implements Serializable { public static final

问题 In a project that I got assigned which is using Struts2 I need to do the following things, but I'm new to using Struts2. Move text from titles and most common / repeating texts to a .properties file. Change URLs from images to make the system parameterized, so they should be in the same .properties file as well. I've been able to change some of the titles, first linking Struts2 with my .properties file, following this answer. Content.properties login.logo=/resources/media/login.png login

问题 In request attribute I have list of objects (say user objects) so how can I loop through it display data on my jsp page? Can I use <c:foreach> but then how I can say that it is User object and access properties of that? 回答1: JSTL/EL doesn't care about the exact type. All you need to ensure is that the object in question has a getter method for the given property so that you can just specify the property name. Imagine, public class User { private Long id; private String name; private Integer

问题 How can I convert object types within EL expressions? Thymeleaf engine doesn't seem to understand something like this: <span th:text="${((NewObjectType)obj).amount"></span> Thanks. Update: Class hierarchy in which I store data. They are used to populate the HTML table. public class RootBase implements Serializable { ... } public class ColBase<T extends RootBase> implements Serializable { private ArrayList<T> internalList; public int getSize() { ... } public T get(int index) { return

问题 I am pretty new in Java EE, i am trying use that .war file http://community.jboss.org/wiki/ThreadDumpJSP , but it seems index.jsp file doesn't show variable, I see only ${thr.name} ${thr.state} ${thr.priority} ${thr.daemon} I am tested it on jboss and tomcat 6 edit: here is code: package org.jboss.varia.threaddump.ThreadDumpBean; import java.io.Serializable;import java.util.*; public class ThreadDumpBean implements Serializable { private final Map traces; public ThreadDumpBean() {traces = new

问题 In a column of a table I've tried to bind a component value to a local scoped EL variable and later on to use that variable as a paramter: <h:column> <h:outputLabel value="Enter a quantity to put into the cart" for="qty"/> <h:inputText id="qty" binding="#{qty}" converter="javax.faces.Number"/> </h:column> <h:column> <h:commandButton value="Put into cart" type="submit" action="#{shoppingCart.addToCart(product, qty)}"/> </h:column> Where product is the current element of the datatable (a list