求问<html:errors/>

 <html:errors property="length error"/> 
 <html:errors property="user error"/> 

解决方案 »

  1.   

    按照你的改法，访问后如下
    org.apache.jasper.JasperException: Exception in JSP: /error.jsp:3128:   <body>
    29:     This a error page. <br>
    30:   
    31:    <html:errors property="length error"/>  
    32:   <html:errors property="user error"/>  
    33:     
    34:   </body>
    Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:451)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
    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:803)
    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.doGet(ActionServlet.java:507)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    root cause java.lang.ClassCastException: org.apache.struts.action.ActionMessage
    org.apache.struts.taglib.html.ErrorsTag.doStartTag(ErrorsTag.java:215)
    org.apache.jsp.error_jsp._jspx_meth_html_005ferrors_005f0(error_jsp.java:168)
    org.apache.jsp.error_jsp._jspx_meth_html_005fhtml_005f0(error_jsp.java:120)
    org.apache.jsp.error_jsp._jspService(error_jsp.java:68)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    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:803)
    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.doGet(ActionServlet.java:507)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    note The full stack trace of the root cause is available in the Apache Tomcat/5.5.25 logs.
      

  2.   

    <bean:write property="这里应该和Form里面的ae.add("user rror", new ActionMessage("com.user.error")); " 之中的“user rror是一样的”/>
      

  3.   

    谢谢楼上的，是我明白了<bean:write> property属性的意思.
    但是用
    <html:messages id="error"> 
                <span id="error"> <bean:write name="error" /> </span> <br> 
      </html:messages>
    可以输出错误的，
    我问的是使用<html:errors/>怎么才能将信息输出？？？
      

  4.   

    ae.add("length error", new ActionMessage("com.length.error"));  
    改成ae.add("length error", new ActionError("com.length.error"));