初学struts问题简单的问题************************************************************

代码没错啊.把XML文件贴上来看看.

解决方案 »

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd"><struts-config>
  <data-sources />
  <form-beans >
    <form-bean name="userLoginForm" type="com.yourcompany.struts.form.UserLoginForm" />  </form-beans>  <global-exceptions />
  <global-forwards />
  <action-mappings >
    <action
      attribute="userLoginForm"
      input="/userLogin.jsp"
      name="userLoginForm"
      path="/userLogin"
      scope="request"
      type="com.yourcompany.struts.action.UserLoginAction"
      validate="true">
      <forward name="faile" path="/userLogin.jsp" />
    </action>
  </action-mappings>
  <message-resources parameter="com.yourcompany.struts.ApplicationResources" />
</struts-config>
<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic" %>

<html>
<head>
<title>JSP for UserLoginForm form</title>
</head>
<body>
<br/>
<html:errors/>
<center>
<html:form action="/userLogin">
userName : <html:text property="userName" size="10"></html:text>
<logic:present name="error" scope="request">
<h2>
<bean:write name="error" scope="request"/><p>
</h2>
</logic:present>
<html:errors/>    ×这里无法显示，页面报错
<input type="button" onClick="javascript:aa()" value="tj"/>
<html:reset/>
</html:form>
</center>
</body>
<script language="javascript">
function aa()
{
userLoginForm.submit();
}
</script>
</html>
userName == null || userName.length() < 1:
userName == null && userName.length() < 1
userName.length() ,userName为null,不能执行userName.length()
在登陆页只写一个FORM.其他的不要.还是没看出有什么错误.
资源文件没问题吧.