<s:fielderror/>

        该标签主要用于在页面上输出在Action中设置的FieldError信息。用法如下所示：

// TestStruts2Tag.java

import  com.opensymphony.xwork2.ActionSupport;

public   class  TestStruts2Tag  extends  ActionSupport 

{

    @Override

    public String execute() throws Exception {

        // TODO Auto-generated method stub

        return  SUCCESS;

    }

    @Override

    public void validate() {

        // TODO Auto-generated method stub

        this.addActionError("actionError!");

        this.addActionMessage("actionMessage!");

        this.addFieldError("field", "fieldError");

        this.addFieldError("field2", "fieldError2");

    }

}

// index.jsp部分代码

< s:fielderror />

    < s:fielderror >

            < s:param > field </ s:param >

            < s:param > field2 </ s:param >

    </ s:fielderror >

// struts.xml

<! DOCTYPE struts PUBLIC

     " -//Apache Software Foundation//DTD Struts Configuration 2.0//EN "

     " http://struts.apache.org/dtds/struts-2.0.dtd " >

< struts >

     < include file = " struts-default.xml " />

     < package  name = " TestStruts2Tag "   extends = " struts-default " >

         < action name = " testTag "   class = " TestStruts2Tag " >

             < result name = " success " >/ index.jsp </ result >

             < result name = " input " >/ index.jsp </ result >

         </ action >

     </ package >

</ struts >

        注：<s:fielderror />用于输出所有FieldError信息。

                <s:fielderror>

     　　　　　<s:param>field</s:param>

    　　　　　 <s:param>field2</s:param>

  　　　 </s:fielderror>

                或

                <s:fielderror>

         　　　 <s:param value="%{'field'}" />

         　　　 <s:param value="%{'field2'}" />

   　　　 </s:fielderror>

                用于输出"field"和"field2"的信息。

            7、<s:actionerror/>

            用于输出ActionError信息。用法如下所示：

< s:actionerror />

            8、用于输出ActionMessage信息。用法如下所示：

< s:actionmessage />