jstl | 易学教程

JSP Expression Language Error

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问题 I have created a dynamic web module project usig STS and Spring MVC. The problem is I have add a string into a Model but it cannot be display on the JSP page using EL. May I know what wrong with it? Below is the details: JSP Page <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1" isELIgnored="false" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <%@ taglib prefix="c" uri="http:

Looking for JSTL Taglib calculate seconds between two dates

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问题 I'm looking for a taglib to use for calculating how many seconds there was between two dates. 回答1: You just do that with EL: <jsp:useBean id="now1" class="java.util.Date" /> <jsp:useBean id="now2" class="java.utli.Date" /> The difference is: ${now1.time/1000) - (now2.time/1000)} That's just a simple compilable example -- in real life, the two dates would hold different values. 来源： https://stackoverflow.com/questions/5820248/looking-for-jstl-taglib-calculate-seconds-between-two-dates

Populating a drop down list in JSP from a Array List of Bean type

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问题 In my Java EE project I have the following Servlet: import java.io.IOException; import java.sql.Connection; import java.sql.ResultSet; import java.sql.Statement; import java.util.ArrayList; import javax.naming.InitialContext; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.sql

Type [java.lang.String] is not valid for option items upon migrating from Spring 3.0.6 to 3.2.3

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问题 I am working on migrating a dynamic web project from Spring 3.0.6 to 3.2.3. Prior to this migration, we had no issue with our dropdowns. However, after migrating, we get the following error: Exception created : com.ibm.websphere.servlet.error.ServletErrorReport: javax.servlet.jsp.JspException: Type [java.lang.String] is not valid for option items I've removed all the code to isolate the issue, so below is the relevant code. Please let me know if any further information is needed. The thing

ui:repeat using the same client id. c:foreach works fine

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问题 I know this may have something to do with the phase each one comes in at. If I do this. <ui:repeat id="repeatChart" varStatus="loop" value="#{viewLines.jflotChartList}" var="jflotChart"> <p:panel> <jflot:chart height="300" width="925" dataModel="#{jflotChart.dataSet}" dataModel2="#{jflotChart.dataSet2}" xmin="#{jflotChart.startDateString}" xmax="#{jflotChart.endDateString}" shadeAreaStart ="#{jflotChart.shadeAreaStart}" shadeAreaEnd ="#{jflotChart.shadeAreaEnd}" lineMark="#{jflotChart

Evaluating a Struts value within a JSTL tag

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问题 I'm currently developing a language pack for an application built on Struts 2. The language pack is defined in a properties file which will be accessed by the frontend JSP via JSTL (FMT tags). I'm trying to achieve something like String formatting, i.e. inserting a Struts value into a sentence string retrieved via an FMT tag. What's defined in my properties file: userprofile.link.text = <a href="{0}">Click here</a> to view your profile page. And from the JSP side, <fmt:message key=

Maven工程子模块引用父pom.xml中的jar包及举例

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Maven工程子模块引用父pom.xml中的jar包方式一：如果父pom中使用的是 <dependencies>....</dependencies> 这种方式，则子pom会自动使用pom中的jar包；方式二：如果父pom使用 <dependencyManagement> <dependencies>....</dependencies> </dependencyManagement> 的方式，则子pom不会自动使用父pom中的jar包，这时如果子pom想使用的话，就要给出groupId和artifactId，无需给出version。方式一比较容易理解，此处就不举例了。方式二举例：父pom.xml使用的如下所示：  <dependencyManagement> <dependencies>  <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> <

JSTL while loop (without scriptlets)

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问题 Is there a way to create a while loop like structure with JSP, without using a scriptlet? I ask as I have a linked list-like structure (specifically, printing the cause chain for exceptions) which AFAIK does not have an iterator interface to use forEach on. 回答1: You could do it by iterating over a list <c:forEach var="entry" items="${requestScope['myErrorList']}"> ${entry.message}<br/> </c:forEach> EDIT: You could have a method like the following to transform an exception and its causes into

第6章视图和视图解析器

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> Spring MVC如何解析视图视图和视图解析器请求处理方法执行完成后，最终返回一个 ModelAndView 对象。对于那些返回 String ， View 或 ModeMap 等类型的处理方法，Spring MVC也会在内部将它们装配成一个 ModelAndView 对象，它包含了逻辑名和模型对象的视图。 Spring MVC 借助视图解析器（ViewResolver）得到最终的视图对象（View），最终的视图可以是JSP，也可以是Excel、JFreeChart等各种表现形式的视图。对于最终究竟采取何种视图对象对模型数据进行渲染，处理器并不关心，处理器工作重点聚焦在生产模型数据的工作上，从而实现MVC的充分解耦。视图其作用是渲染模型数据，将模型里的数据以某种形式呈现给客户。为了实现视图模型和具体实现技术的解耦，Spring在 org.springframework.web.servlet 包中定义了一个高度抽象的 View 接口：视图对象由视图解析器负责实例化。由于视图是无状态的。所以它们不会有线程安全的问题。常用的视图实现类视图解析器 SpringMVC为逻辑视图名的解析提供了不同的策略，可以在Spring WEB上下文中配置一种或多种解析策略，并指定他们之间的先后顺序

ELException on Tomcat 5.5 and JSTL 1.2

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问题 Setup: Apache Tomcat 5.5 Servlet/JSP: 2.4/2.0 according to http://tomcat.apache.org/whichversion.html JSTL in .WAR: 1.2 But I still get a java.lang.NoClassDefFoundError: javax/el/ELException From what I have understood by reading question here at SO is that the ELException class has been moved and the container should include it. Previously in JSTL 1.1 it was provided in the JSTL .jar. Since the container is JSP 2.0 I am confused about this. 回答1: From what I have understood by reading