struts 找不到ActionFrom 新手求助 在线等

struts-config.xml 中的内容：
  <form-beans >
    <form-bean name="studentForm" type="struts.form.StudentForm" />
  </form-beans>
  
  <action-mappings >
    <action
      attribute="studentAction"      input="/register.jsp"      name="studentFrom"      path="/student"      validate="true"      scope="request"      type="struts.action.StudentAction">      </action>jsp 页面：
   
  <html:form action="student" method="post">
   <table align="center" bgcolor="#ffffff" border="0">
    <tr><td colspan="2" align="center">学生信息登记</td></tr>错误信息：
org.apache.jasper.JasperException: Exception in JSP: /register.jsp:107: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
8: <html:html>
9:    <head><title>登记页面</title></head>
10:   <html:form action="student" method="post">
11:    <table align="center" bgcolor="#ffffff" border="0">
12:     <tr><td colspan="2" align="center">学生信息登记</td></tr>
13:      <tr>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:451)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
root cause javax.servlet.ServletException: Cannot retrieve definition for form bean studentFrom on action student
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:774)
org.apache.jsp.register_jsp._jspService(register_jsp.java:85)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
root cause javax.servlet.jsp.JspException: Cannot retrieve definition for form bean studentFrom on action student
org.apache.struts.taglib.html.FormTag.lookup(FormTag.java:761)
org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:443)
org.apache.jsp.register_jsp._jspx_meth_html_005fform_005f0(register_jsp.java:133)
org.apache.jsp.register_jsp._jspx_meth_html_005fhtml_005f0(register_jsp.java:106)
org.apache.jsp.register_jsp._jspService(register_jsp.java:76)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)