JSF中同一页面多个表单中的commandLink 无法生成隐藏域BUG[已经查出原因并非JSF的BUG]

JSF中同一页面多个表单中的commandLink 无法生成隐藏域BUG[已经查出原因并非JSF的BUG]

原来是Tomcat服务器有问题但是其他工程项目都可以正常使用只是不能自动生成那个隐藏域更换了Tomcat版本后问题解决

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更进一步原因是：添加了Tomcat管理模块导致了这个问题apache-tomcat-5.5.20-admin.zip

Tomcat版本：apache-tomcat-5.5.20.zip
========================================================================

======JavaScript错误信息============================================================================
出现了运行时间错误。
是否要进行调试？

行：33
错误：'document.forms.frmDisplay.frmDisplay:_idc1' 为空或不是对象

======异常信息===================================================================================
2007-1-24 14:29:15 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
javax.servlet.jsp.JspException: Cannot find FacesContext
at javax.faces.webapp.UIComponentTag.doStartTag(UIComponentTag.java:399)
at com.sun.faces.taglib.jsf_core.ViewTag.doStartTag(ViewTag.java:105)
at org.apache.jsp.index_jsp._jspx_meth_f_view_0(index_jsp.java:115)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:90)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)

======页面代码===================================================================================
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>

<%
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>My JSF 'index.jsp' starting page</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">

</head>

<body>
<f:view>
  <h:form id="frmLogin">
   <h:commandLink value="欢迎页面" action="#{testBean.gotoWelcome}"></h:commandLink>:

  </h:form>
  <h:form id="frmDisplay">
   <h:commandLink value="显示" action="#{testBean.gotoDisplay}"></h:commandLink>
  </h:form>
</f:view>
</body>
</html>

======JSF生成的HTML代码===================================================================================
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="http://localhost:8888/JSFTestPrj/">

</head>

<body>

<form id="frmLogin" method="post" action="/JSFTestPrj/index.faces" enctype="application/x-www-form-urlencoded">

   <a href="#" onclick="document.forms['frmDisplay']['frmDisplay:_idcl'].value='frmDisplay:_id1'; document.forms['frmDisplay'].submit(); return false;">显示</a>
  <input type="hidden" name="frmDisplay" value="frmDisplay" /></form>

</body>
</html>
======问题所在===================================================================================
上面的JSF生成的代码中，对比两个表单代码的不同就可以发现：

表单form id="frmLogin"有生成隐藏域：<input type="hidden" name="frmLogin:_idcl" />

并且<h:commandLink/>生成的代码也引用到了这个隐藏域： <a href="#" onclick="document.forms['frmLogin']['frmLogin:_idcl'].value='frmLogin:_id0'; document.forms['frmLogin'].submit(); return false;">欢迎页面</a>:

表单form id="frmDisplay"没有生成隐藏域：：<input type="hidden" name="frmDisplay:_idcl" />

但是<h:commandLink/>生成的代码却引用到了这个隐藏域：<a href="#" onclick="document.forms['frmDisplay']['frmDisplay:_idcl'].value='frmDisplay:_id1'; document.forms['frmDisplay'].submit(); return false;">显示</a>

所以导致出错,其实从javascript错误信息就很容易看出来了。这应该是JSF 的BUG。

我的环境：
   Eclipse Version:3.2.1
   MyEclipse Version: 5.1.0 Build id: 20061111-5.1.0-GA
   JDK: jdk1.5.0_06
   Tomcat: tomcat-5.5.20
   JSF: Sun JSF Reference Implementation 1.1.01 （MyEclipse自带）

posted on 2007-01-24 14:44 蓝色随想阅读(1719) 评论(3) 编辑收藏举报

JSF中同一页面 多个表单中的commandLink 无法生成隐藏域BUG[已经查出原因 并非JSF的BUG]

JSF中同一页面多个表单中的commandLink 无法生成隐藏域BUG[已经查出原因并非JSF的BUG]