今天查了好多资料终于把这个该死的验证搞清楚了，其实最终还是从struts官方网站上找的例子，发现自己好笨，而且学习方法真的很重要，现在总结如下：
1。要在struts－config。xml里加上plugin－in定义：
<plug-in className="org.apache.struts.validator.ValidatorPlugIn"> <set-property property="pathnames" value="/WEB-INF/validator-rule.xml, /WEB-INF/validation.xml"/> </plug-in>
2。在web－inf下面新建两个xml，一个是validator－rule。xml，一个是validation。xml，举例如下：
validation。xml：
<?xml version="1.0" encoding="iso-8859-1"?><!DOCTYPE form-validation PUBLIC "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.1.3//EN" "http://jakarta.apache.org/commons/dtds/validator_1_1_3.dtd"><form-validation> <global> <constant> <constant-name>phone</constant-name> <constant-value>^\(?(\d{3})\)?[-| ]?(\d{3})[-| ]?(\d{4})$</constant-value> </constant> <constant> <constant-name>postnum</constant-name> <constant-value>^\d{5}\d*$</constant-value> </constant> </global>
<!-- ========================= Default Formset ========================= --> <formset> <constant> <constant-name>postnum</constant-name> <constant-value>^\d{5}(-\d{4})?$</constant-value> </constant> <form name="addUserForm"> <field property="name" depends="required,mask,minlength"> <arg key="member.name" position="0"/> <arg name="minlength" key="${var:minlength}" resource="false" position="1"/> <var> <var-name>mask</var-name> <var-value>^\w+$</var-value> </var> <var> <var-name>minlength</var-name> <var-value>5</var-value> </var> </field> <field property="password" depends="required,mask,maxlength"> <arg key="member.password" position="0" /> <arg name="maxlength" key="${var:maxlength}" resource="false" position="1"/> <var> <var-name>mask</var-name> <var-value>^[a-zA-Z]*$</var-value> </var> <var> <var-name>maxlength</var-name> <var-value>10</var-value> </var> </field> <field property="birth" depends="required"> <arg key="member.birth" /> </field> <field property="arress" depends="required"> <arg key="member.address" /> </field> <field property="phone" depends="mask"> <arg key="registrationForm.phone.displayname" /> <var> <var-name>mask</var-name> <var-value>${phone}</var-value> </var> </field> <field property="email" depends="required,email"> <arg key="registrationForm.email.displayname" /> </field> </form> </formset></form-validation>validator－rule。xml：
<!DOCTYPE form-validation PUBLIC "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.1.3//EN" "http://jakarta.apache.org/commons/dtds/validator_1_1_3.dtd"><!-- $Id: validator-rules.xml 159291 2005-03-28 20:19:29Z niallp $
This file contains the default Struts Validator pluggable validator definitions. It should be placed somewhere under /WEB-INF and referenced in the struts-config.xml under the plug-in element for the ValidatorPlugIn.
<plug-in className="org.apache.struts.validator.ValidatorPlugIn"> <set-property property="pathnames" value="/WEB-INF/validator-rules.xml, /WEB-INF/validation.xml"/> </plug-in>
These are the default error messages associated with each validator defined in this file. They should be added to your projects ApplicationResources.properties file or you can associate new ones by modifying the pluggable validators msg attributes in this file.
# Struts Validator Error Messages errors.required={0} is required. errors.minlength={0} can not be less than {1} characters. errors.maxlength={0} can not be greater than {1} characters. errors.invalid={0} is invalid.
errors.byte={0} must be a byte. errors.short={0} must be a short. errors.integer={0} must be an integer. errors.long={0} must be a long. errors.float={0} must be a float. errors.double={0} must be a double.
errors.date={0} is not a date. errors.range={0} is not in the range {1} through {2}. errors.creditcard={0} is an invalid credit card number. errors.email={0} is an invalid e-mail address.
Note: Starting in Struts 1.2.0 the default javascript definitions have been consolidated to commons-validator. The default can be overridden by supplying a <javascript> element with a CDATA section, just as in struts 1.1.
-->
<form-validation>
<global>
<validator name="required" classname="org.apache.struts.validator.FieldChecks" method="validateRequired" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" msg="errors.required"/>
<validator name="requiredif" classname="org.apache.struts.validator.FieldChecks" method="validateRequiredIf" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" msg="errors.required"/>
<validator name="validwhen" msg="errors.required" classname="org.apache.struts.validator.validwhen.ValidWhen" method="validateValidWhen" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest"/>
<validator name="minlength" classname="org.apache.struts.validator.FieldChecks" method="validateMinLength" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.minlength" jsFunction="org.apache.commons.validator.javascript.validateMinLength"/>
<validator name="maxlength" classname="org.apache.struts.validator.FieldChecks" method="validateMaxLength" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.maxlength" jsFunction="org.apache.commons.validator.javascript.validateMaxLength"/>
<validator name="mask" classname="org.apache.struts.validator.FieldChecks" method="validateMask" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.invalid"/>
<validator name="byte" classname="org.apache.struts.validator.FieldChecks" method="validateByte" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.byte" jsFunctionName="ByteValidations"/>
<validator name="short" classname="org.apache.struts.validator.FieldChecks" method="validateShort" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.short" jsFunctionName="ShortValidations"/>
<validator name="integer" classname="org.apache.struts.validator.FieldChecks" method="validateInteger" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.integer" jsFunctionName="IntegerValidations"/>
<validator name="long" classname="org.apache.struts.validator.FieldChecks" method="validateLong" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.long"/>
<validator name="float" classname="org.apache.struts.validator.FieldChecks" method="validateFloat" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.float" jsFunctionName="FloatValidations"/>
<validator name="double" classname="org.apache.struts.validator.FieldChecks" method="validateDouble" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.double"/>
<validator name="date" classname="org.apache.struts.validator.FieldChecks" method="validateDate" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.date" jsFunctionName="DateValidations"/>
<validator name="intRange" classname="org.apache.struts.validator.FieldChecks" method="validateIntRange" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="integer" msg="errors.range"/>
<validator name="floatRange" classname="org.apache.struts.validator.FieldChecks" method="validateFloatRange" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="float" msg="errors.range"/>
<validator name="doubleRange" classname="org.apache.struts.validator.FieldChecks" method="validateDoubleRange" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="double" msg="errors.range"/>
<validator name="creditCard" classname="org.apache.struts.validator.FieldChecks" method="validateCreditCard" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.creditcard"/>
<validator name="email" classname="org.apache.struts.validator.FieldChecks" method="validateEmail" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.email"/>
<validator name="url" classname="org.apache.struts.validator.FieldChecks" method="validateUrl" methodParams="java.lang.Object, org.apache.commons.validator.ValidatorAction, org.apache.commons.validator.Field, org.apache.struts.action.ActionMessages, org.apache.commons.validator.Validator, javax.servlet.http.HttpServletRequest" depends="" msg="errors.url"/>
<!-- This simply allows struts to include the validateUtilities into a page, it should not be used as a validation rule. --> <validator name="includeJavaScriptUtilities" classname="" method="" methodParams="" depends="" msg="" jsFunction="org.apache.commons.validator.javascript.validateUtilities"/>
</global>
</form-validation>3。在相应的验证页面加上验证信息：
<html:form action="/addUser.do?call=add" method="POST" onsubmit="return validateAddUserForm(this);">
<html:javascript formName="addUserForm"/>
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