struts中js验证的问题,谢谢!!!

Question

<html:form action="/UserLoginAction" onsubmit="return checkMail(document.form[0].mail.value)">这样写能通过吗？html:form 没有onsubmit属性吧？
给你的form命个名然后写方法在mail.js中function formName.onsubmit(){
       ..............
}

Answer 1

要是用struts的validate你就不用写什么表达式了。你可以试试看。

Answer 2

在struts中，js验证采用如下格式：
<html:form  action="/UserLoginAction" focus="username" onsubmit="return validateLogonForm(this);">
...................
<html:javascript formName="logonForm" dynamicJavascript="true" staticJavascript="false"  />
<script language=Javascript1.1 src="staticJavascript.jsp"></script>
.............
其中logonForm在validation.xml中定义：
 <form name="logonForm">            <field property="username"
                    depends="required, minlength,maxlength">
                <arg0   key="prompt.username"/>
                <arg1   key="${var:minlength}" name="minlength"
                   resource="false"/>
                <arg2   key="${var:maxlength}" name="maxlength"
                   resource="false"/>
                <var>
                    <var-name>maxlength</var-name>
                    <var-value>16</var-value>
                </var>
                <var>
                    <var-name>minlength</var-name>
                    <var-value>3</var-value>
                </var>
            </field>            <field property="password"
                    depends="required, minlength,maxlength"
                    bundle="alternate">
                <arg0   key="prompt.password"/>
                <arg1   key="${var:minlength}" name="minlength"
                   resource="false"/>
                <arg2   key="${var:maxlength}" name="maxlength"
                   resource="false"/>
                <var>
                    <var-name>maxlength</var-name>
                    <var-value>16</var-value>
                </var>
                <var>
                    <var-name>minlength</var-name>
                    <var-value>3</var-value>
                </var>
            </field>        </form>
对应的js代码在validator-rules.xml中定义：
<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.ActionErrors,
                       javax.servlet.http.HttpServletRequest"
                  msg="errors.required">         <javascript><![CDATA[
            function validateRequired(form) {
                var isValid = true;
                var focusField = null;
                var i = 0;
                var fields = new Array();
                oRequired = new required();
                for (x in oRequired) {
                 var field = form[oRequired[x][0]];
                
                    if (field.type == 'text' ||
                        field.type == 'textarea' ||
                        field.type == 'file' ||
                        field.type == 'select-one' ||
                        field.type == 'radio' ||
                        field.type == 'password') {
                        
                        var value = '';
// get field's value
if (field.type == "select-one") {
var si = field.selectedIndex;
if (si >= 0) {
value = field.options[si].value;
}
} else {
value = field.value;
}
                        
                        if (value == '') {
                        
                        if (i == 0) {
                            focusField = field;
                        }
                        fields[i++] = oRequired[x][1];
                        isValid = false;
                        }
                    }
                }
                if (fields.length > 0) {
                   focusField.focus();
                   alert(fields.join('\n'));
                }
                return isValid;
            }]]>
         </javascript>      </validator>

Answer 3

<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.ActionErrors,
                               org.apache.commons.validator.Validator,
                               javax.servlet.http.HttpServletRequest"
                 msg="errors.required">
      </validator>      <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.ActionErrors,
                       javax.servlet.http.HttpServletRequest"
              depends=""
                  msg="errors.minlength">         <javascript><![CDATA[
            function validateMinLength(form) {
                var isValid = true;
                var focusField = null;
                var i = 0;
                var fields = new Array();
                oMinLength = new minlength();
                for (x in oMinLength) {
                    var field = form[oMinLength[x][0]];
                    
                    if (field.type == 'text' ||
                        field.type == 'textarea') {
                        
                        var iMin = parseInt(oMinLength[x][2]("minlength"));
                        if ((field.value.length > 0) && (field.value.length < iMin)) {
                            if (i == 0) {
                                focusField = field;
                            }
                            fields[i++] = oMinLength[x][1];
                            isValid = false;
                        }
                    }
                }
                if (fields.length > 0) {
                   focusField.focus();
                   alert(fields.join('\n'));
                }
                return isValid;
            }]]>
         </javascript>      </validator>
      <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.ActionErrors,
                       javax.servlet.http.HttpServletRequest"
              depends=""
                  msg="errors.maxlength">         <javascript><![CDATA[
            function validateMaxLength(form) {
                var isValid = true;
                var focusField = null;
                var i = 0;
                var fields = new Array();
                oMaxLength = new maxlength();
                for (x in oMaxLength) {
                    var field = form[oMaxLength[x][0]];
                    
                    if (field.type == 'text' ||
                        field.type == 'textarea') {
                        
                        var iMax = parseInt(oMaxLength[x][2]("maxlength"));
                        if (field.value.length > iMax) {
                            if (i == 0) {
                                focusField = field;
                            }
                            fields[i++] = oMaxLength[x][1];
                            isValid = false;
                        }
                    }
                }
                if (fields.length > 0) {
                   focusField.focus();
                   alert(fields.join('\n'));
                }
                return isValid;
            }]]>
         </javascript>      </validator>

Answer 4

也许是你的这句onsubmit="return checkMail(document.form[0].mail.value)"有问题，js是个弱类型语言，
给document.form[0].mail.value加上''或""，即('document.form[0].mail.value')或("document.form[0].mail.value"),或者
最好将document.form[0].mail.value赋给一个变量，在通过js传递给你的函数，试试。