struts-sandbox/mailreader-course/struts2/register2/src/java/Register-validation.xml

<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">

<validators>

    <field name="username">
        <field-validator type="requiredstring">
            <message>Username is required</message>
        </field-validator>
    </field>

    <field name="fullName">
        <field-validator type="requiredstring">
            <message>Full Name is required</message>
        </field-validator>
    </field>

    <field name="fromAddress">
        <field-validator type="requiredstring">
            <message>From Address is required</message>
        </field-validator>
        <field-validator type="email">
            <message>Invalid format for From Address</message>
        </field-validator>
    </field>

    <field name="replyToAddress">
        <field-validator type="email">
            <message>Invalid format for Reply To Address</message>
        </field-validator>
    </field>

    <field name="password">
        <field-validator type="requiredstring">
            <message>Password is required</message>
        </field-validator>
        <field-validator type="stringlength">
            <param name="trim">true</param>
            <param name="minLength">4</param>
            <param name="maxLength">10</param>
            <message>Password length is not in the range 4 through 10.</message>
        </field-validator>
    </field>

    <field name="password2">
        <field-validator type="requiredstring">
            <message>Confirmation password is required</message>
        </field-validator>
    </field>

    <validator type="expression">
        <param name="expression">password eq password2</param>
        <message>Invalid username and/or password, please try again</message>
    </validator>

</validators>