Matt RaibleMatt Raible is a Java Champion and Developer Advocate at Okta.

The JHipster Mini-Book The JHipster Mini-Book is a guide to getting started with hip technologies today: Angular, Bootstrap, and Spring Boot. All of these frameworks are wrapped up in an easy-to-use project called JHipster.

This book shows you how to build an app with JHipster, and guides you through the plethora of tools, techniques and options you can use. Furthermore, it explains the UI and API building blocks so you understand the underpinnings of your great application.

For book updates, follow @jhipster-book on Twitter.


Over 10 years ago, I wrote my first blog post. Since then, I've authored books, had kids, traveled the world, found Trish and blogged about it all.

Struts Validator: Validating Two Fields Match

In the Struts Validator Guide, there is a section on how to create a pluggable validator that matches two fields. I've been using this server-side validator (as shown in the example) to do password/confirm password validation. This has worked great for me, but I've always wanted the Validator to have the client-side JavaScript method for it too. I wrote my own that just compared the two fields, but it's not the same as having one rendered for you (from validator-rules.xml). So yesterday, I did some tinkering and figured out how to add the JavaScript method to validator-rules.xml. So here's how to configure the whole thing (most of this is contained in the Validator Guide, save the JavaScript).

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)) {
                           Resources.getActionError(request, va, field));

                return false;
        } catch (Exception e) {
                       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" 
   depends="required" msg="errors.twofields">
        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) {
            return bValid;

Step 3: Configure validation for your form in validation.xml:

<field property="password"

  <arg0 key="userForm.password"/>

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;

I've sent this as a proposal to the struts-dev mailing list yesterday, but haven't heard anything yet. Enjoy!

Update: You'll need to update and validator-rules-custom.xml for Struts 1.2. Full files: and validation-rules-custom.xml.

Posted in Java at Feb 26 2003, 12:29:56 PM MST 10 Comments

Moblogger works with Roller!

I did some testing with Russ's Moblogger this morning and it works great with Roller! I haven't tested attaching images, but sending a plain text message worked like a charm. The hardest part was setting up the e-mail address. I'll try to document my setup procedures tonight for other Roller users.

Hopefully, I'll be setting this up on this site so I can post with my T68i. What does that give me? Nothing, absolutely nothing - simply the ability to post 1 liners or something like that. Of course, I could also be motivated to get the phone's camera - that might make it a little more worthwhile. Good excuse for new gadget. I dig the software/idea - thanks Russ!

Moblogger Logo

Posted in Roller at Feb 26 2003, 06:39:19 AM MST 5 Comments