jstl

问题 I've been doing this the whole time in my JSP code: <c:out value="${myVar}"/> Today I just realized for the first time that I seem to be able to use this shorter version just as well: ${myVar} It works without <c:out> ! Perhaps this is because my page is declared like this: <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8" isELIgnored="false" %> So, my question is, can I replace <c:out> in my code with this shorter version? Is there any reason to keep using

问题 I've a Map in a bean as follows: public class TaskListData { private Map<String, String[]> srcMasks = new HashMap<String, String[]>(); private Map<Integer, Map<String, String[]>> ftqSet = new HashMap<Integer, Map<String, String[]>>(); public void setFTQSet(Integer ftqid, String[] src, String[] masks) { srcMasks.put("srcDir", src); srcMasks.put("masks", masks); ftqSet.put(ftqid, srcMasks); } This ftqSet fits in below datastructure: feedId = "5", feedName = "myFeedName", ftqSet => { 1 => {

问题 I'm trying to show a session attribute "userSession" in a jsp page using JSP EL, but it returns null (case 1). Request attributes are shown properly in EL expressions though. Using java scriptlet instead, behaves as shown in cases 2 and 3: <c:out value="${userSession}"/> \\Returns null <c:out value='<%=request.getSession().getAttribute("userSession")%>'/> \\Works fine - returns session attribute <c:out value='<%=session.getAttribute("userSession")%>'/> \\Throws exception: cannot find variable

问题 Below is the code which i have written to retrieve values from the database (I have added the whole code so it will be easier for you to understand what i am trying to say here): package ipscheme; import java.sql.*; public class AddRecords { Connection con = new DBConnection().getConnection(); ResultSet resultSet = null; public String [] populateSelect() throws SQLException { Statement statement = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY); resultSet =

问题 I have such this code inside my Spring MVC java controller class: @RequestMapping(value = "jobs", method = { RequestMethod.GET }) public String jobList(@PathVariable("username") String username, Model model) { JobInfo[] jobInfo; JobStatistics js; LinkedList<JobStatistics> jobStats = new LinkedList<JobStatistics>(); try { jobInfo = uiClient.getJobs(username); for (int i = 0; i < jobInfo.length; i++) { js = uiClient.getJobStatistics(jobInfo[i].getJobId()); jobStats.add(js); } model.addAttribute

问题 I am not sure if this is a complex problem but as a starting person this seems a bit complex to me. I have an object based on which i need to show some values on the UI and let user select some of them, i need to send data back to another controller when user click on the submit button.Here is the structure of my data object public class PrsData{ private Map<String, List<PrsCDData>> prsCDData; } public class PrsCDData{ private Map<String, Collection<ConfiguredDesignData>> configuredDesignData

问题 I am pulling a long timestamp from a database, but want to present it as a Date using Tags only, no embedded java in the JSP. I've created my own tag to do this because I was unable to get the parseDate and formatDate tags to work, but that's not to say they don't work. Any advice? Thanks. 回答1: The parseDate and formatDate tags work, but they work with Date objects. You can call new java.util.Date(longvalue) to get a date object, then pass that to the standard tag. somewhere other than the

问题 I have two items from my model and I want to iterate them at the same using jstl foreach. how can I achieve this using a correct syntax? 回答1: You can call varStatus.index to get the index of the current round of iteration, and then use it as a lookup for the second list. For example, if you have two lists people.firstnames and people.lastnames you can do: <c:forEach var="p" items="${people.firstnames}" varStatus="status"> <tr> <td>${p}</td> <td>${people.lastnames[status.index]}</td> </tr> </c

问题 In JSP, I want to compare two variables If I do: <c:set var="pagerTotDisp" value="9"/> <c:if test="${pagerTotDisp > 8}"> <span>pagerTotDisp above 8</span> </c:if> It displays "pagerTotDisp above 8" as expected <c:set var="TotalPages" value="10"/> <c:if test="${TotalPages > 2}"> <span>TotalPages above 2</span> </c:if> It displays "pagerTotDisp above 8" as expected But then if I do <c:set var="pagerTotDisp" value="9"/> <c:set var="TotalPages" value="10"/> <c:if test="${TotalPages < pagerTotDisp

问题 I am writing a web application that runs within an embedded Jetty instance. When I attempt to execute a JSTL statement, I receive the following exception: org.apache.jasper.JasperException: /index.jsp(1,63) PWC6188: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application I have the following jars on the classpath ant-1.6.5.jar ant-1.7.1.jar ant-launcher-1.7.1.jar core-3.1.1.jar jetty-6.1.22.jar jetty-util-6.1.22