el 表达式不能用

lilinew 2009-09-23 03:51:04
在jsp加了 <%@ page isELIgnored="false" %>

<input readonly type="text" name="startDate" id="aa" onclick="getDateString(this,oCalendarEn)" value="${startDate}">
发现不能用 value="${startDate}"的输出结果是${startDate} 不是实际的数值

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monkeyking1987 2009-11-25
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我也是用J2EE 5.0.结果也是出为来.不知道为什么
lilinew 2009-10-30
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${param.startDate}">
小_Y 2009-10-15
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我的也是 j2ee 5.0的也出不来。。。
domsn 2009-10-15
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直接用J2EE5.0,EL都可以直接用，根本不需要填哪些
senlin789 2009-10-15
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你用J2EE1.4版本的试试
senlin789 2009-10-15
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lilinew 2009-09-23
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at org.apache.jasper.compiler.Compiler.compile(Compiler.java:282)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
Sep 23, 2009 7:34:23 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: /hello.jsp(1,1) Page directive: invalid value for isELIgnored
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:102)
at org.apache.jasper.compiler.PageInfo.setIsELIgnored(PageInfo.java:614)
at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:166)
at org.apache.jasper.compiler.Node$PageDirective.accept(Node.java:590)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2343)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2393)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2399)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:489)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2343)
at org.apache.jasper.compiler.Validator.validate(Validator.java:1702)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:166)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:315)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:282)
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:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
Sep 23, 2009 7:34:31 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: /hello.jsp(1,1) Page directive: invalid value for isELIgnored
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:102)
at org.apache.jasper.compiler.PageInfo.setIsELIgnored(PageInfo.java:614)
at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:166)
at org.apache.jasper.compiler.Node$PageDirective.accept(Node.java:590)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2343)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2393)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2399)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:489)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2343)
at org.apache.jasper.compiler.Validator.validate(Validator.java:1702)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:166)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:315)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:282)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:586)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
Sep 23, 2009 7:34:35 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: /hello.jsp(1,1) Page directive: invalid value for isELIgnored
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:102)
at org.apache.jasper.compiler.PageInfo.setIsELIgnored(PageInfo.java:614)
at org.apache.jasper.compiler.Validator$DirectiveVisitor.visit(Validator.java:166)
at org.apache.jasper.compiler.Node$PageDirective.accept(Node.java:590)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2343)
at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2393)
at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2399)
at org.apache.jasper.compiler.Node$Root.accept(Node.java:489)
at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2343)
at org.apache.jasper.compiler.Validator.validate(Validator.java:1702)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:166)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:315)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:282)
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:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
lilinew 2009-09-23
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<!--CTYPE web-app PUBLIC </sp-->
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
在默认情况下，Servlet 2.3 / JSP 1.2是不支持EL表达式的，而Servlet 2.4 / JSP 2.0支持。
如果web.xml如下设置也不支持EL表达式：
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
解决方法：
1.修改web.xml文件为（Servlet 2.4 / JSP 2.0）：
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_4.xsd">
2.设置某个jsp页面使用el表达式，需要在jsp页面加上（控制单个页面）
<%@ page isELIgnored="false"%>
<jsp-config>
<jsp-property-group>
<url-pattern>*.jsp</url-pattern>
<el-ignored>false</el-ignored>
</jsp-property-group>
</jsp-config>
lilinew 2009-09-23
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另外新建立一个2。4的工程
发现还是不可以的俄
welllit 2009-09-23
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期待。
lilinew 2009-09-23
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<jsp-config>
<jsp-property-group>
<url-pattern>*.jsp</url-pattern>
<el-ignored>true</el-ignored>
<!-- <el-ignored>false</el-ignored> -->
</jsp-property-group>
</jsp-config>

<jsp-config>
<jsp-property-group>
<url-pattern>*.jsp</url-pattern>
<el-ignored>true</el-ignored>
<!-- <el-ignored>false</el-ignored> -->
</jsp-property-group>
</jsp-config>

还是不可以的额
yukang_ky 2009-09-23
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有可能是jsp的版本低了
sunnylyy 2009-09-23
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不是2.4的话不能直接用,不过可以和jstl一起用

<c:out value="${startDate}"/>
lilinew 2009-09-23
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<?xml version="1.0" encoding="ISO-8859-1"?>


<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>


<display-name>Struts AddressBook Sample Applications</display-name>
<servlet>
<servlet-name>userdatabase</servlet-name>
<servlet-class>addressbook.UserDatabaseServlet</servlet-class>
<init-param>

好像不是的额
sunnylyy 2009-09-23
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必须是servlet2.4才可以。看web.xml前几行,有没有version="2.4"
gerryliu 2009-09-23
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可能是jsp版本问题，false是对的
lilinew 2009-09-23
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isELIgnored 意思是忽略吗
fasle表示不hulue
如果true那就是 忽略
说不通
zy_love 2009-09-23
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而且 <%@ page isELIgnored="false" %> 你把false改成true你看看
zy_love 2009-09-23
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看下你的jsp版本。。要求JSP2.0才能使用EL表达式
struts2 标签里面不能使用el表达式可以使用ongl表达式
本文介绍了在Struts2框架中使用ONG表达式的正确方法，并解释了为什么不能使用EL表达式。通过实例展示了如何将EL表达式转换为正确的ONG表达式。
jsp中EL表达式不能显示的解决方法
本文详细介绍了在使用JSP2.0时，EL表达式不能显示的原因及对应的解决办法，包括web.xml配置、jsp页面配置等方面。
JSP页面不能解析EL表达式。
本文详细介绍了在使用JSP页面时遇到EL表达式被当作字符串打印的问题及解决方案。作者在从Struts2转向Struts1的过程中，发现JSP页面的isELIgnored属性设置不当导致EL表达式无法正常工作。通过调整该属性并正确引入JSTL标签库，问题得以解决。
EL表达式不能取值的问题
本文介绍了在JSP中使用EL表达式时的一个常见错误——为属性添加双引号会导致无法取值。通过一个具体例子说明了如何正确地在Servlet的Request域中设置属性，并在JSP页面中通过EL表达式获取这些属性。
单独js文件不能用EL表达式
本文探讨了单独JS文件中EL表达式的局限性及解决方案，指出由于客户端和服务器端执行环境不同，直接使用EL表达式将无效。文章提供了两种解决方法：一是利用window.onload()获取EL值；二是通过JSP页面隐藏域传递值。
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