Struts中Validate验证出问题，请大家帮忙

先贴出代码：
jsp页面的：login.jsp<body>
<html:errors/>
<html:form action="login.do" method="post" focus="username">

    用户名 : <html:text property="username"/><br/><html:errors property="username" />
密码: <html:password property="password"/><br/><html:errors property="password"/>
<html:submit value='提交'/><html:reset value='重置'></html:reset>
</html:form>
</body>FormBean的代码：public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
ActionErrors actionerrors=new ActionErrors();

if(getUsername()==null||getUsername().length()<1)
{
    actionerrors.add("username",new ActionMessage("username-null"));

}
if(password==null||"".equals(password))
{
actionerrors.add("password",new ActionMessage("password-null"));

}
return actionerrors;
}Struts-config.xml文件：<struts-config>
  <data-sources />
  <form-beans >
    <form-bean name="loginForm" type="com.view.struts.form.LoginForm" />
    <form-bean name="SearchForm" type="com.view.struts.form.SearchForm" />  </form-beans>  <global-exceptions />
  <global-forwards />
  <action-mappings >
    <action
      attribute="loginForm"
      input="/login.jsp"
      name="loginForm"
      path="/login"
      scope="session"
      validate="true"
      type="com.view.struts.action.LoginAction">
      <forward name="error" path="/error.jsp" />
      <forward name="success" path="/search.jsp" />
    </action>
    <action
      attribute="SearchForm"
      input="/search.jsp"
      name="SearchForm"
      path="/search"
      scope="session"
      type="com.view.struts.action.SearchAction" >
      <forward name="found-data" path="/show.jsp"/>
      <forward name="no-data" path="/nodata.jsp"/>
      </action>
    
  </action-mappings>  <message-resources parameter="com.view.struts.ApplicationResources" />
</struts-config>
报错为：
description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
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:802)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)
org.apache.struts.action.RequestProcessor.internalModuleRelativeForward(RequestProcessor.java:1012)
org.apache.struts.action.RequestProcessor.processValidate(RequestProcessor.java:980)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:255)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause java.lang.ClassCastException
org.apache.struts.taglib.html.ErrorsTag.doStartTag(ErrorsTag.java:215)
org.apache.jsp.login_jsp._jspx_meth_html_errors_0(login_jsp.java:123)
org.apache.jsp.login_jsp._jspService(login_jsp.java:93)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
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:802)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)
org.apache.struts.action.RequestProcessor.internalModuleRelativeForward(RequestProcessor.java:1012)
org.apache.struts.action.RequestProcessor.processValidate(RequestProcessor.java:980)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:255)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs
最后感谢大家帮忙

解决方案 »

  1.   

    actionerrors.add("username",new ActionMessage("username-null"));
    应该用new ActionError吧
      

  2.   

    java.lang.ClassCastException 
    看到一个这个，是不是哪里转型错了啦？而且这样写validate不行哦，永远不能通过验证。
      

  3.   

    用validate框架.不用自己写非空验证啊..
      

  4.   


    他没用validator框架，只是重写form的validate方法
      

  5.   

    对啊。我没用那个validator框架啊。只是想自己写用一下formbean的这个方法。过去用过，一切正常。这次，死活通不过。不知道，怎么回事啊。请大家帮忙。
      

  6.   

    你的STRUTS版本装错了,应该是1.2版的~~~