在struts中进行采用Validator进行输入验证有很多好处，完全可以通过修改XML文件来根据客户的要求定制数据验证而不用修改代码。但是Valiator没有提供现成的进行两个字段比较的验证方法，如验证输入密码和确认密码一致，后面的日期必须大于前面的日期等等。下面是我实现的两个字段进行比较的验证方法，可以进行两个字段是字符串、日期、数字类型的数据的比较。下面是我的实现方法，望指正：
|
在Struts中应用Validator进行两个字段的比较的方法。
validation.xml使用示例：
|
validation-rules.xml中定义规则：
|
application_zh.properties中定义的错误消息：
errors.twoFields={0}必须{1}{2}
怎么JDon现在发帖子时总会贴不上。害得我辛辛苦苦写的一段没有了:(:( faint.不写了。
This is another way.........
http://www.raibledesigns.com/page/rd/20030226struts_validator_validating_two_fields
How To Add a TwoFields Validator
Step 1: Create a class with a validateTwoFields method. In my code, my class is ValidationUtil and has the following method:
public static boolean validateTwoFields(Object bean, ValidatorAction va,
Field field, ActionErrors errors,
HttpServletRequest request) {
String value =
ValidatorUtil.getValueAsString(bean, field.getProperty());
String sProperty2 = field.getVarValue("secondProperty");
String value2 = ValidatorUtil.getValueAsString(bean, sProperty2);
if (!GenericValidator.isBlankOrNull(value)) {
try {
if (!value.equals(value2)) {
errors.add(field.getKey(),
Resources.getActionError(request, va, field));
return false;
}
} catch (Exception e) {
errors.add(field.getKey(),
Resources.getActionError(request, va, field));
return false;
}
}
return true;
}
Step 2: Edit validator-rules.xml to contain the "twofields" rule.
<validator name="twofields"
classname="org.appfuse.webapp.util.ValidationUtil" method="validateTwoFields"
methodParams="java.lang.Object,
org.apache.commons.validator.ValidatorAction,
org.apache.commons.validator.Field,
org.apache.struts.action.ActionErrors,
javax.servlet.http.HttpServletRequest"
depends="required" msg="errors.twofields">
<javascript><![CDATA[
function validateTwoFields(form) {
var bValid = true;
var focusField = null;
var i = 0;
var fields = new Array();
oTwoFields = new twofields();
for (x in oTwoFields) {
var field = form[oTwoFields[x][0]];
var secondField = form[oTwoFields[x][2]("secondProperty")];
if (field.type == 'text' ||
field.type == 'textarea' ||
field.type == 'select-one' ||
field.type == 'radio' ||
field.type == 'password') {
var value;
var secondValue;
// get field's value
if (field.type == "select-one") {
var si = field.selectedIndex;
value = field.options[si].value;
secondValue = secondField.options[si].value;
} else {
value = field.value;
secondValue = secondField.value;
}
if (value != secondValue) {
if (i == 0) {
focusField = field;
}
fields[i++] = oTwoFields[x][1];
bValid = false;
}
}
}
if (fields.length > 0) {
focusField.focus();
alert(fields.join('\n'));
}
return bValid;
}]]></javascript>
</validator>
Step 3: Configure validation for your form in validation.xml:
<field property="password"
depends="required,twofields">
<msg
name="required"
key="errors.required"/>
<msg
name="twofields"
key="errors.twofields"/>
<arg0 key="userForm.password"/>
<arg1
key="userForm.confirmPassword"
/>
<var>
<var-name>secondProperty</var-name>
<var-value>confirmPassword</var-value>
</var>
</field>
Where errors.twofields=The '{0}' field has to have the same value as the '{1}' field. An alternative to Step 3 is to use XDoclet to generate your validation.xml. This requires (1) configuring XDoclet (of course) and (2) adding some @struts tags to your form on the setPassword method.
/**
* Returns the password.
* @return String
*
* @struts.validator type="required" msgkey="errors.required"
* @struts.validator type="twofields" msgkey="errors.twofields"
* @struts.validator-args arg1resource="userForm.password"
* @struts.validator-args arg1resource="userForm.confirmPassword"
* @struts.validator-var name="secondProperty" value="confirmPassword"
*/
public String setPassword() {
return password;
}
楼上是用于比较两个口令是否一致，这只是我的方法中的一种情况。：）：）。我的实现也是参考了kuang提到的示例。
好文章，顶一下。
想看一下com.sysway.quintum.validator.WrapData类是怎么写的,^_^，能不能show一下？
因为我们大部分是比较字符型、日期型、和数字型。所以我仅实现了这三种比较。
|