JSTL表达式的问题？

genius0182

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Java Web Apache Servlet Spring

我在做例子时总是说这行有错误<c:out value="${error}"></c:out>
错误如下：
org.apache.jasper.JasperException: /WEB-INF/fail.jsp(29,2) According to TLD or attribute directive in tag file, attribute value does not accept any expressions
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:357)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:141)
org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:940)
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:695)
org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1441)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Validator.validate(Validator.java:1474)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:214)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:422)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:507)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:274)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:111)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:965)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:744)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:663)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:394)
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:358)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
jsp页面代码如下：

<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%@ taglib prefix="c" uri="/WEB-INF/c.tld" %>
<%@ taglib prefix="fmt" uri="/WEB-INF/fmt.tld" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>ok</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

  </head>
  
  <body>
  <c:out value="${error}"></c:out><br>
  </body>
</html>

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HIBERNATE乱码问题

2007-04-09 18:38
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分类:企业架构
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10 楼 genius0182 2007-04-11

问题解决了，我把JSTL1.1的包导进去就好用了。应该是以前的c标签太老的原因。谢谢大家的参与。

9 楼 hgq0011 2007-04-10

“attribute value does not accept any expressions “不能接收表达示。那你就研究一下jstl<c:out>到底怎么写撒。

8 楼 genius0182 2007-04-09

你说的初始化工作是不是配置文件里的东西呀？
配置文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>
	<bean id="FormController" class="web.FormController">
        <property name="sessionForm"><value>true</value></property>
        <property name="commandName"><value>user</value></property>
        <property name="commandClass"><value>pojo.Tusers</value></property>
        <property name="formView"><value>login</value></property>
        <property name="fail_view">  
			<value>fail</value> 
		</property> 
		<property name="success_view"> 
        	<value>ok</value>
		</property> 
        <property name="userservice">
			<ref bean="userService" />
		</property>
    </bean>
    <bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> 
        <property name="mappings">
            <props>
                <prop key="/login.htm">FormController</prop>
            </props>
        </property>
    </bean>
    <bean id="viewResolver" class = "org.springframework.web.servlet.view.InternalResourceViewResolver">
	<property name="viewClass"><value>org.springframework.web.servlet.view.JstlView</value></property>
	<property name ="prefix"><value>/WEB-INF/</value></property>
	<property name ="suffix"><value>.jsp</value></property>
</bean>
</beans>

请看看有什么地方不正确吗？

7 楼 rainlife 2007-04-09

哦，你用的是Spring啊，使用JSTL的话，要让Spring支持JSTL才行的，必须使用一个特殊的JstView类，在执行JSTL前完成一些初始化的工作。

6 楼 genius0182 2007-04-09

这是我的处理器。

/**
 * 
 */
package web;

import java.util.HashMap;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.view.RedirectView;

import pojo.Tusers;
import service.UserService;

/**
 * @author Administrator
 *
 */
public class FormController extends SimpleFormController {
	
	private UserService userservice;
	private String fail_view;
	private String success_view;
	protected ModelAndView onSubmit(Object command) throws Exception{
		Tusers tt = (Tusers)command;
		System.out.println("userName: "+tt.getUserName());
		System.out.println("password: "+tt.getPassword());
		HashMap hm = new HashMap();
		try
		{
			userservice.checkLogin(tt);
			
			hm.put("userName", tt.getUserName());
		}
		catch(RuntimeException e)
		{
			hm.put("error", e.getMessage());
			System.out.println(e);
//			return new ModelAndView(new RedirectView(this.getFail_view()),hm);
			return new ModelAndView(this.getFail_view(),hm);
		}
		
		return new ModelAndView(this.getSuccess_view(),hm);
	}
	/**
	 * @return the userservice
	 */
	public UserService getUserservice() {
		return userservice;
	}
	/**
	 * @param userservice the userservice to set
	 */
	public void setUserservice(UserService userservice) {
		this.userservice = userservice;
	}
	/**
	 * @return the fail_view
	 */
	public String getFail_view() {
		return fail_view;
	}
	/**
	 * @param fail_view the fail_view to set
	 */
	public void setFail_view(String fail_view) {
		this.fail_view = fail_view;
	}
	/**
	 * @return the success_view
	 */
	public String getSuccess_view() {
		return success_view;
	}
	/**
	 * @param success_view the success_view to set
	 */
	public void setSuccess_view(String success_view) {
		this.success_view = success_view;
	}

}

5 楼 genius0182 2007-04-09

包我导进去了。我的error在Contrller中设了。我用

String error = (String)request.getAttribute("error");
<%=error%>

这么用就好使。一换成表达式的形式就出上面的错误。

4 楼 rainlife 2007-04-09

引用

# <%@ taglib prefix="c" uri="/WEB-INF/c.tld" %>
# <%@ taglib prefix="fmt" uri="/WEB-INF/fmt.tld" %>

这个用法是对的，在容器启动的时候，会自动地将JSTL支持加载进来的，而并不用在web.xml中做什么配置。不知道你的包有没有导入正确，另外，你是不是试一下用<c:set />将error设置一下？

3 楼 genius0182 2007-04-09

我加了。
web.xml如下:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
	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">
	<servlet>
   <servlet-name>web</servlet-name>  
   <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
   <load-on-startup>2</load-on-startup>
   </servlet>


 <servlet-mapping>
 <servlet-name>web</servlet-name>
 <url-pattern>*.htm</url-pattern>
 </servlet-mapping>

 <servlet>
 <servlet-name>context</servlet-name>
 <servlet-class>org.springframework.web.context.ContextLoaderServlet</servlet-class>
 <load-on-startup>1</load-on-startup>
 </servlet>


 <context-param>
 <param-name>contextConfigLocation</param-name>
 <param-value>/WEB-INF/applicationContext.xml</param-value>
 </context-param>
<welcome-file-list>
    <welcome-file>
      login.jsp
    </welcome-file>
  </welcome-file-list>	
 <taglib>
    <taglib-uri>/spring</taglib-uri>
    <taglib-location>/WEB-INF/spring.tld</taglib-location>
  </taglib>
  
  <taglib>
    <taglib-uri>/WEB-INF/c.tld</taglib-uri>
    <taglib-location>/WEB-INF/c.tld</taglib-location>
  </taglib>
  
  
  <taglib>
    <taglib-uri>/WEB-INF/fmt.tld</taglib-uri>
    <taglib-location>/WEB-INF/fmt.tld</taglib-location>
  </taglib>
</web-app>

2 楼 jamesby 2007-04-09

http://jamesby.iteye.com/admin/show/53055

1 楼 lsy 2007-04-09

web.xml
加上下面的代码没有啊？

		<taglib>
			<taglib-uri>/WEB-INF/core.tld</taglib-uri>
			<taglib-location>/WEB-INF/tld/c.tld</taglib-location>
		</taglib>

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