jstl

Using JSTL how to “put” a value into a HashMap

由 旧巷老猫 提交于 2019-12-21 11:33:09
问题 I'm looking to set the key value pairing of a HashMap using JSTL only. Is this possible? I know how to retrieve the key value pairs, but I haven't found a way to set them. Any help would be appreciated. Example of retrieving HashMap key/value pairs using JSTL: <c:forEach var="hash" items="${myHashMap}"> <c:out value="${hash.key}" /> <c:out value="${hash.value}" /> ... 回答1: You can use the <c:set>. <c:set target="${myHashMap}" property="key" value="value"/> 回答2: I wouldn't use JSTL to do that,

SpringMVC form:options items attribute: what exactly is it expecting?

由 眉间皱痕 提交于 2019-12-21 07:31:16
问题 I'm still new to SpringMVC (and jstl for that matter). I'm trying to populate options in a select from a list of objects. I've found a way to do it using c:forEach, but I keep thinking there HAS to be a way to make the form:options method work. I've browsed around, and about the closest thing I can find to official documentation on the items attribute is here >> http://static.springsource.org/spring/docs/2.0.x/reference/spring-form.tld.html#spring-form.tld.options It says the items attribute

SpringMVC form:options items attribute: what exactly is it expecting?

由 有些话、适合烂在心里 提交于 2019-12-21 07:31:04
问题 I'm still new to SpringMVC (and jstl for that matter). I'm trying to populate options in a select from a list of objects. I've found a way to do it using c:forEach, but I keep thinking there HAS to be a way to make the form:options method work. I've browsed around, and about the closest thing I can find to official documentation on the items attribute is here >> http://static.springsource.org/spring/docs/2.0.x/reference/spring-form.tld.html#spring-form.tld.options It says the items attribute

JSTL support in Spring Boot

由 风格不统一 提交于 2019-12-21 05:22:38
问题 Though I know that there are some limitations in the JSP support, I want to use JSP with JSTL tags in Spring Boot web application. An extract of my JSP file: <%@ page pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%> ... <c:catch var="ex"> <c:if test="${!fn:contains(param.template,'../') && !fn:startsWith(param.template,'/')}"> <c:import url= ... So, I added to the following

javaweb实训下

由 喜你入骨 提交于 2019-12-21 04:35:42
在web目录里常见css子目录，在里面创建main.css文件： /* 样式 */ body { margin : 0px ; text-align : center ; background : url("../images/frontBack.jpg") no-repeat ; background-size : 100% } table { margin : 0 auto ; font-size : 14px ; color : #333333 ; border-width : 1px ; border-color : khaki ; border-collapse : collapse ; } table th { border-width : 1px ; padding : 8px ; border-style : solid ; border-color : gainsboro ; background-color : honeydew ; } table td { border-width : 1px ; padding : 8px ; border-style : solid ; border-color : gainsboro ; background-color : #ffffff ; } /*登录页面样式*/ .login { width : 400px ;

JSTL taglibs not recognized when declared in common header

由 佐手、 提交于 2019-12-21 04:00:50
问题 I had the idea a while back to put all of my taglib declarations (uri's, etc) in a common header file so I don't have to manually write them into all of my JSPs. Initially, things seemed fine, although I don't use the actual taglibs as much as just the simple EL syntax. However, I'm having trouble in all jsp files except for the one that explicitly has the taglibs declared. All of the other jsp's (that include the header file) treat the <c:something.../> tag as if it's HTML and don't evaluate

When to use requestScope in jstl?

由 半世苍凉 提交于 2019-12-20 12:37:34
问题 A jstl variable is set in request scope in a jsp <c:set var="name" value="Tiger" scope="request" /> This variable is accessed from a jspf included to this jsp. Now, is there any difference in accessing the variable in these two ways ? 1) <c:out value="${name}" /> 2) <c:out value="${requestScope.name}" /> When to use requestScope ? 回答1: You use requestScope when you absoluetely want your object to come from the request, and not from the page, session or application scope. Inded, using ${name}

Enum inside a JSP [duplicate]

由 孤人 提交于 2019-12-20 11:53:04
问题 This question already has answers here : How to reference constants in EL? (12 answers) Closed last year . Is there a way to use Enum values inside a JSP without using scriptlets. e.g. package com.example; public enum Direction { ASC, DESC } so in the JSP I want to do something like this <c:if test="${foo.direction ==<% com.example.Direction.ASC %>}">... 回答1: You could implement the web-friendly text for a direction within the enum as a field: <%@ page import="com.example.Direction" %> ... <p

JSTL taglib URI is obsolete?

由 喜夏-厌秋 提交于 2019-12-20 10:46:22
问题 I've been checking out Spring MVC tutorial and copied this small JSP code from there: <%@ page session="false"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <html> <head><title>Training, Inc.</title></head> <body> <h2><c:out value="${message}" /></h2> </body> </html> There is a string set for message and the c:out tag just prints literally ${message} I was hitting my head for a while until I remembered an issue I had before and changed the taglib URI to: <%@ taglib prefix

difference between eq and == in JSP

由 倾然丶 夕夏残阳落幕 提交于 2019-12-20 10:19:14
问题 What is the difference, if any, between the keyword 'eq' and the operator '==' in JSP Expression Language? In code, what is the difference between: <c:if test="${var1 eq var2}">some code</c:if> and <c:if test="${var1 == var2}">some code</c:if> 回答1: eq exists (as well as ne , lt , etc) so you can avoid using XML entity references (< is an XML character and would need to be escaped as < , for example), but they do the same thing. See Comparison operators in JSP for more info. 来源： https:/
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