如何扩充struts验证框架，进行多表单页面的验证

struts的validator的客户端验证，不能进行多表单页面的验证，原因是由<html:script>标签生成的javascipt是根据每个表单，生成一段代码。例如：

<html:javascript formName="searchSgbySjForm" dynamicJavascript="true" staticJavascript="false"/>生成     var bCancel = false;

    function validateSearchSgbySjForm(form) {                                                                           if (bCancel)       return true;         else        return validateRequired(form) && validateDate(form);    }

    function required () {      this.aa = new Array("sgfssjq", "事故发生时间起 不可为空.", new Function ("varName", "this.datePatternStrict='yyy-MM-dd';  return this[varName];"));     this.ab = new Array("sgfssjz", "事故发生时间止 不可为空.", new Function ("varName", "this.datePatternStrict='yyy-MM-dd';  return this[varName];"));    }

    function DateValidations () {      this.aa = new Array("sgfssjq", "事故发生时间起 不是有效的日期类型.", new Function ("varName", "this.datePatternStrict='yyy-MM-dd';  return this[varName];"));     this.ab = new Array("sgfssjz", "事故发生时间止 不是有效的日期类型.", new Function ("varName", "this.datePatternStrict='yyy-MM-dd';  return this[varName];"));    }

如果有多个的话required和DateValidations 都会重复的，而javascript是只认最后一个函数的。所以，会导致验证出错。

再写一个标签 ，主要根据原来的代码修改，代码如下:

/* * $Header: /home/cvs/jakarta-struts/src/share/org/apache/struts/taglib/html/JavascriptValidatorTag.java,v 1.52 2004/08/07 04:17:52 martinc Exp $ * $Revision: 1.52 $ * $Date: 2004/08/07 04:17:52 $ * * Copyright 2001-2004 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */

package com.tmri.acd.tag;

import java.io.IOException;import java.util.ArrayList;import java.util.Collections;import java.util.Comparator;import java.util.Iterator;import java.util.List;import java.util.Locale;import java.util.Map;

import javax.servlet.jsp.JspException;import javax.servlet.jsp.JspWriter;import javax.servlet.jsp.PageContext;import javax.servlet.jsp.tagext.BodyTagSupport;

import org.apache.commons.validator.Field;import org.apache.commons.validator.Form;import org.apache.commons.validator.ValidatorAction;import org.apache.commons.validator.ValidatorResources;import org.apache.commons.validator.util.ValidatorUtils;import org.apache.commons.validator.Var;import org.apache.struts.Globals;import org.apache.struts.action.ActionMapping;import org.apache.struts.config.ModuleConfig;import com.tmri.acd.tag.TagUtils;import org.apache.struts.util.MessageResources;import org.apache.struts.validator.Resources;import org.apache.struts.validator.ValidatorPlugIn;import java.util.StringTokenizer;

/** * Custom tag that generates JavaScript for client side validation based * on the validation rules loaded by the <code>ValidatorPlugIn</code> * defined in the struts-config.xml file. * * @version $Revision: 1.52 $ $Date: 2004/08/07 04:17:52 $ * @since Struts 1.1 */public class JavascriptValidatorTag extends BodyTagSupport {

    /**     * A Comparator to use when sorting ValidatorAction objects.     */    private static final Comparator actionComparator = new Comparator() {        public int compare(Object o1, Object o2) {

            ValidatorAction va1 = (ValidatorAction) o1;            ValidatorAction va2 = (ValidatorAction) o2;

            if ((va1.getDepends() == null || va1.getDepends().length() == 0)                && (va2.getDepends() == null || va2.getDepends().length() == 0)) {                return 0;

            } else if (                (va1.getDepends() != null && va1.getDepends().length() > 0)                    && (va2.getDepends() == null || va2.getDepends().length() == 0)) {                return 1;

            }