<interceptor-ref name="validation">
    <param name="excludemethods">
        input,back,cancel,browse
    </param>
</interceptor-ref>

<validators>
    <validator name="required" class="com.opensymphony.xwork.validator.validators.requiredfieldvalidator"/>
    <validator name="requiredstring" class="com.opensymphony.xwork.validator.validators.requiredstringvalidator"/>
    <validator name="int" class="com.opensymphony.xwork.validator.validators.intrangefieldvalidator"/>
    <validator name="double" class="com.opensymphony.xwork.validator.validators.doublerangefieldvalidator"/>
    <validator name="date" class="com.opensymphony.xwork.validator.validators.daterangefieldvalidator"/>
    <validator name="expression" class="com.opensymphony.xwork.validator.validators.expressionvalidator"/>
    <validator name="fieldexpression" class="com.opensymphony.xwork.validator.validators.fieldexpressionvalidator"/>
    <validator name="email" class="com.opensymphony.xwork.validator.validators.emailvalidator"/>
    <validator name="url" class="com.opensymphony.xwork.validator.validators.urlvalidator"/>
    <validator name="visitor" class="com.opensymphony.xwork.validator.validators.visitorfieldvalidator"/>
    <validator name="conversion" class="com.opensymphony.xwork.validator.validators.conversionerrorfieldvalidator"/>
    <validator name="stringlength" class="com.opensymphony.xwork.validator.validators.stringlengthfieldvalidator"/>
    <validator name="regex" class="com.opensymphony.xwork.validator.validators.regexfieldvalidator"/>
</validators>

三、定义校验规则
<!doctype validators public "-//opensymphony group//xwork validator 1.0.2//en"
       "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
<validators>
    <field name="name">
        <!--必添-->
        <field-validator type="requiredstring">
            <!--是否使用trim-->
            <param name="trim">true</param>
            <!--提示的错误信息-->
            <message>you must enter a name</message>
        </field-validator>
    </field>
    <field name="currdate">
        <field-validator type="date">
            <!--最小时间-->
            <param name="min">01/01/2007</param>
            <!--最大时间-->
            <param name="max">02/28/2007</param>
            <!--提示的错误信息-->
            <message>
                the date must be between 01-01-2007 and 02-28-2007.
            </message>
        </field-validator>
    </field>
    <field name="url">
        <!--short-circuit是否短路检验，类似&&运算的短路算法-->
        <field-validator type="required" short-circuit="true">
            <!--提示的错误信息-->
            <message>you must enter a value for url.</message>
        </field-validator>
        <!--webwork提供的url验证-->
        <field-validator type="url" short-circuit="true">
            <!--提示的错误信息-->
            <message>not a valid url.</message>
        </field-validator>
    </field>
    <field name="mail">
        <field-validator type="required">
            <message>you must enter a value for 邮件.</message>
        </field-validator>
        <!--mail的验证，验证器由webwork提供-->
        <field-validator type="email">
            <message>not a valid 邮件.</message>
        </field-validator>
    </field>
    <field name="age">
        <field-validator type="int">
            <!--同样的最大最小值-->
            <param name="min">1</param>
            <param name="max">200</param>
            <message>
                <!--注意这里，msn中可以用表达式取出值栈中的值例如${min}-->
                only people ages ${min} to ${max} may be true,otherwise
                you are a ghost
            </message>
        </field-validator>
    </field>
    <field name="desc">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>you must enter a desc</message>
        </field-validator>
        <field-validator type="stringlength">
            <param name="minlength">1</param>
            <param name="maxlength">10</param>
            <!--从属性文件中取出my.key显示，如果取不到my.key就显示
            you must enter a desc length=10(my.key)-->
            <message key="my.key">
                you must enter a desc length=10(my.key)
            </message>
        </field-validator>
        <!--可以使用正则表达式-->
        <field-validator type="regex">
            <param name="expression">
                <![cdata[([a-z][0-9][a-z][x])]]>
            </param>
            <!--message可以由固定的字符串，值栈中的值${desc}以及通过调用方法取到的
            属性文件中的值${gettext('my.key')}-->
            <message>
                "regex error ${gettext('my.key')} ${desc}"
            </message>
        </field-validator>
    </field>
    <!--上边的验证叫字段验证，下边这些验证叫普通验证，普通验证是优于字段验证的。
    在使用短路的时候要小心-->
    <!--上边那些都是基于字段的验证，这个是基于action的验证
    如果要在页面显示这些消息，需要加入<ww:actionerror/>
    -->
    <validator type="expression">
        <!--可以基于表达式的验证name.equals(desc)-->
        <param name="expression">name.equals(desc)</param>
        <message>name not the same as desc</message>
    </validator>
    <!-- plain validator 2 -->
    <!--可以基于表达式的验证mail.startswith('mark')-->
    <validator type="expression" short-circuit="true">
        <param name="expression">mail.startswith('mark')</param>
        <message>email does not start with mark</message>
    </validator>
</validators>

<%@page contenttype="text/html; charset=utf-8" pageencoding="utf-8"%>
<%@ taglib prefix="ww" uri="/webwork"%>
<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html>
    <head>
        <title></title>
        <ww:head />
    </head>
    <body>
        <!--  
        如果想统一的显示所有的erro打开下边这句
        <ww:fielderror />
        如果想显示其中一个error打开下边这句，默认显示在字段的正上方
        <ww:fielderror>
            <ww:param value="%{'name'}" />
        </ww:fielderror>
        <ww:fielderror>
            <ww:param>desc</ww:param>
        </ww:fielderror>
         -->
        <ww:form name="test" namespace="/" action="dbadmin" method="post" validate="true">
            <ww:actionmessage />
            <ww:actionerror/>
            <ww:textfield label="name" name="name" />
            <ww:date id="strcurrdate" name="currdate" format="yyyy-mm-dd" />
            <ww:datepicker name="currdate" id="currdate" showstime="true"
                format="%y-%m-%e %h:%m" cssclass="tx" language="zh" required="true"
                template="datepicker.ftl" label="currdate" value="%{strcurrdate}" >
            </ww:datepicker>
            <ww:textfield label="url" name="url" />
            <ww:textfield label="mail" name="mail" />
            <ww:textfield label="age" name="age" />
            <ww:textfield label="desc" name="desc" />
            <ww:submit action="dbadmin" method="dotestvalidator"
                value="dotestvalidator" />
        </ww:form>
    </body>
</html>

六、对应上边的action代码
package niis.web.actions.temp;

import java.text.simpledateformat;
import java.util.date;

import niis.persistence.itestdao;
import niis.persistence.dao.sqlcommand;
import niis.web.actions.abstractaction;

public class dbadminaction {
    private string name;
    private date currdate ;
    private string url;
    private string mail;
    private int age;
    private string desc;
    
    public string dotestvalidator(){
        system.out.println(name);
        system.out.println(currdate);
        system.out.println(url);
        system.out.println(mail);
        system.out.println(age);
        return success;
    }
    /** *//**
     * @return the age
     */
    public int getage() {
        return age;
    }
    /** *//**
     * @param age the age to set
     */
    public void setage(int age) {
        this.age = age;
    }
    /** *//**
     * @return the date
     */
    public date getcurrdate() {
        return currdate;
    }
    /** *//**
     * @param date the date to set
     */
    public void setcurrdate(date date) {
        this.currdate = date;
    }
    /** *//**
     * @return the mail
     */
    public string getmail() {
        return mail;
    }
    /** *//**
     * @param mail the mail to set
     */
    public void setmail(string mail) {
        this.mail = mail;
    }
    /** *//**
     * @return the name
     */
    public string getname() {
        return name;
    }
    /** *//**
     * @param name the name to set
     */
    public void setname(string name) {
        this.name = name;
    }
    /** *//**
     * @return the url
     */
    public string geturl() {
        return url;
    }
    /** *//**
     * @param url the url to set