那些遇到过的问题

相关疑难解决方法(0)

如何安装JSTL？绝对的uri:http://java.sun.com/jstl/core无法解决

我不知道我做错了什么,但我不能包括JSTL.我有jstl-1.2.jar,但不幸的是我得到了例外:

org.apache.jasper.JasperException: The absolute uri: http://java.sun.com/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application
    at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:51)
    at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
    at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:116)
    at org.apache.jasper.compiler.TagLibraryInfoImpl.generateTLDLocation(TagLibraryInfoImpl.java:315)
    at org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:148)
    at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:429)
    at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:492)
    at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1439)
    at org.apache.jasper.compiler.Parser.parse(Parser.java:137)
    at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:255)
    at org.apache.jasper.compiler.ParserController.parse(ParserController.java:103)
    at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:170)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:332)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:312)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:299)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) …
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jsp servlets jstl

luk*_*ymo
2019 05-05
124
推荐指数
8
解决办法
34万
查看次数

JSP EL,JSF EL和Unified EL之间的区别

我想知道Expression Languages(EL)之间的细节差异.有JSP EL,JSF EL和Unified EL.

我想知道EL背后的历史以及Java EE应用程序中使用的最新EL.它是最新版本中所有视图技术的EL通用吗？

jsf jsp el java-ee

Kri*_*hna
2013 04-21
122
推荐指数
2
解决办法
2万
查看次数

JSP/Servlet Web应用程序中的XSS预防

如何在JSP/Servlet Web应用程序中防止XSS攻击？

java security xss jsp servlets

new*_*bie
2015 05-23
67
推荐指数
4
解决办法
11万
查看次数

JSP:不评估EL表达式

我有一个在Tomcat 5.5上运行的JSP页面.我有以下代码:

 <c:forEach var="i" begin="1" end="10" step="1">
  <c:out value="${i}" />
  <br />
</c:forEach>
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我得到的输出是:

${i} 
${i} 
${i} 
${i} 
${i} 
${i} 
${i} 
${i} 
${i} 
${i}
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我无法解决为什么forEach循环工作但输出不起作用.任何人都可以提供任何帮助都会很棒.

java jsp el taglib

作者
2009 04-27
30
推荐指数
4
解决办法
3万
查看次数

JSP中的表达式语言不起作用

我是JSP新手并使用Expression语言.我正在使用Eclipse Galileo 2.5版和Tomcat 6服务器.我只是想问一下,我的简单表达式语言不会像我写的那样打印${1>2},假设它给出了假,但${1>2}它只在呈现页面时显示 .但是当我使用<c:out value="${1>2}"/>它时,正确打印错误.我认为标签库存在问题.请建议我这样做的原因我给出了一个示例代码,以便您可以了解我的错误: - 

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
                                 "http://www.w3.org/TR/html4/loose.dtd">


<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Expression Language Example</title>
</head>
<body>

Is 1 greater than 2 using cout  :<c:out value="${1>2}"/>

Is 1 greater than 2 without using cout: ${1>2}
</body>
</html>
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根据答案更新,这里有更多信息:

我正在展示我的web.xml样子:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:jsp="http://java.sun.com/xml/ns/javaee/jsp" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" …
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java jsp el

use*_*577
2013 06-25
30
推荐指数
3
解决办法
6万
查看次数

在jsp中启用el

如何在JSP 2.0版中启用EL表达式？每次我在JSP中将EL表达式作为String文字作为输出.

这是容器用于向servlet发送请求的DD,然后是servlet向JSP发送请求:

    <web-app 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"
         version="2.4">

    <servlet>
    <servlet-name>check</servlet-name>
    <servlet-class>Welcome</servlet-class>

    </servlet>


<servlet-mapping>
<servlet-name>check</servlet-name>
<url-pattern>/Momma.do</url-pattern>
</servlet-mapping>

</web-app>
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我也没有忽略JSP中的任何el.我还缺少什么吗？

java jsp tomcat servlets

Gre*_*orn
2015 09-24
11
推荐指数
1
解决办法
1万
查看次数

JSTL变量未在EL中显示

EL中未显示JSTL变量值.例如这段代码:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="s" uri="http://www.springframework.org/tags" %>
<html>
<body>
  <c:forEach var="i" begin="1" end="5" >
    <c:out value="${i}" /> 
  </c:forEach>
</body>
</html>
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浏览器呈现如下: ${i} ${i} ${i} ${i} ${i}

或者这一个: 

<c:set var="someVar" value="Hello"/>
<c:out value="${someVar}"/>
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浏览器显示: ${someVar}

我正在使用Spring-MVC 3和Maven构建示例项目,将其部署到Tomcat 7.在Spring的上下文中,我将视图解析器配置如下:

<bean class=
    "org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="
        org.springframework.web.servlet.view.JstlView"></property>
    <property name="prefix" value="/WEB-INF/"></property>
    <property name="suffix" value=".jsp" />
</bean>
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从Spring的控制器传递的模型变量也未显示.

Mavens pom.xml具有以下与jstl相关的依赖关系:

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.1</version>
    <scope>provided</scope>
</dependency>
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那么,有什么建议如何解决这个问题？

java jsp jstl el spring-mvc

adr*_*ift
2012 03-13
6
推荐指数
1
解决办法
5853
查看次数

Spring MVC - 在JSP视图中没有获得价值

首先,我是Spring MVC世界的新手.

我做了一个简单的程序,其中Spring MVC将处理GET请求并设置一个名为"message"的变量.此变量应在JSP中显示设置值,但未按预期执行.代码正在编译并运行正常.能告诉你,这里做错了什么？

web.xml中

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id="WebApp_ID" version="2.5">

    <display-name>Archetype Created Web Application</display-name>

    <servlet>
        <servlet-name>loginDispacher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>loginDispacher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>
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loginDispacher-servlet.xml中

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

    <context:component-scan base-package="com.sandeep" />

    <!-- View resolver -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/" />
        <property name="suffix" value=".jsp" />
    </bean>
</beans>
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Authorization.java

@Controller
@RequestMapping("/authorization")
public class Authorization {
    String message = "This is …
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java spring jsp spring-mvc

San*_*eep
2014 06-09
6
推荐指数
2
解决办法
1万
查看次数

如何安装JSTL？绝对的uri:http://java.sun.com/jsp/jstl/core无法解析

这是我的JSP页面的taglib指令:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>


我收到以下错误:

HTTP Status 500 - 
--------------------------------------------------------------------------------
type Exception report
message 
description The server encountered an internal error () that prevented it from fulfilling this request.
exception 
org.apache.jasper.JasperException: 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
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:51)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:116)
org.apache.jasper.compiler.TagLibraryInfoImpl.generateTLDLocation(TagLibraryInfoImpl.java:315)
org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:148)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:420)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:476)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1426)
org.apache.jasper.compiler.Parser.parse(Parser.java:133)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:215)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:102)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:167)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:306)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:273)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:308)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
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我在/ WEB-INF/lib文件夹中添加了JAR文件jstl.jar和standard.jar. 谁能告诉我我在哪里弄错了？

jsp tomcat jstl

Pau*_*auo
2015 07-29
2
推荐指数
1
解决办法
1万
查看次数

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jsp ×9

java ×6

el ×4

jstl ×3

servlets ×3

spring-mvc ×2

tomcat ×2

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jsf ×1

security ×1

spring ×1

taglib ×1

xss ×1