關於struts2驗證框架

struts2驗證框架分爲字段(field校驗--面向字段、字段優先)校驗器和非字段(validator--校驗面向validator、validator優先)校驗器.

通過驗證框架驗證，只需要刪除掉原來validate()方法中的內容(這篇blog是基於"struts2輸入驗證--validate()驗證"的)，再增加一個xml文件即可：一個Action對應一個驗證xml(RegisterAction.class-->RegisterAction-validation.xml並在同一個包中，注意文件名的對應關係)

1.基於field的驗證框架

<?xml version="1.0"
encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.dtd">
<validators>

    <field
name="username">
        <field-validator
type="requiredstring">
            <message>username shouldn't be null!!!</message>
        </field-validator>

        <field-validator
type="stringlength">
            <param
name="minLength">6</param>
            <param
name="maxLength">10</param>
            <message>username should be between ${minLength} and ${maxLength}</message>
        </field-validator>
    </field>

    <field
name="password">
        <field-validator
type="requiredstring">
            <message>password shouldn't be null!!!</message>
        </field-validator>

        <field-validator
type="stringlength">
            <param
name="minLength">6</param>
            <param
name="maxLength">10</param>
            <message>password should be between ${minLength} and ${maxLength}</message>
        </field-validator>
    </field>

    <field
name="repassword">
        <field-validator
type="requiredstring">
            <message>repassword shouldn't be null!!!</message>
        </field-validator>

        <field-validator
type="stringlength">
            <param
name="minLength">6</param>
            <param
name="maxLength">10</param>
            <message>repassword should be between ${minLength} and ${maxLength}</message>
        </field-validator>
    </field>

    <field
name="age">
        <field-validator
type="int">
            <param
name="min">1</param>
            <param
name="max">150</param>
            <message>age should be between ${min} and ${max}</message>
        </field-validator>
    </field>

    <field
name="birthday">
        <field-validator
type="required">
            <message>birthday shouldn't be null!!!</message>
        </field-validator>

        <field-validator
type="date">
            <param
name="min">2001-01-01</param>
            <param
name="max">2003-08-08</param>
            <message>birthday should be between ${min} and ${max}</message>
        </field-validator>
    </field>

    <field
name="graduation">
        <field-validator
type="required">
            <message>graduation shouldn't be null!!!</message>
        </field-validator>

        <field-validator
type="date">
            <param
name="min">2003-08-08</param>
            <param
name="max">2008-08-08</param>
            <message>graduation should be between ${min} and ${max}</message>
        </field-validator>
    </field>
</validators>

2.基於validator的驗證框架

<?xml version="1.0"
encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.dtd">
<validators>
    <validator
type="requiredstring">
        <param
name="fieldName">username</param>
        <param
name="fieldName">password</param>
        <param
name="fieldName">repassword</param>
        <message>username|password|repassword shouldn't be null!!!</message>
    </validator>

    <validator
type="stringlength">
        <param
name="fieldName">username</param>
        <param
name="fieldName">password</param>
        <param
name="fieldName">repassword</param>
        <param
name="minLength">6</param>
        <param
name="maxLength">10</param>
        <message>username|password|repassword should be between ${minLength} and ${maxLength}</message>
    </validator>

    <validator
type="int">
        <param
name="min">1</param>
        <param
name="max">150</param>
        <message>age should be between ${min} and ${max}</message>
    </validator>

    <validator
type="required">
        <param
name="fieldName">birthday</param>
        <param
name="fieldName">graduation</param>
        <message>birthday|graduation shouldn't be null!!!</message>
    </validator>

    <validator
type="date">
        <param
name="fieldName">birthday</param>
        <param
name="fieldName">graduation</param>
        <param
name="min">2003-08-08</param>
        <param
name="max">2008-08-08</param>
        <message>birthday|graduation should be between ${min} and ${max}</message>
    </validator>
</validators>

其他文件的內容不變(即和上一篇blog：validate()方法驗證時的一致)

struts2與struts1不同，struts1在配置驗證框架時需要配置struts-config.xml，但struts2在配置驗證框架時不再需要配置struts.xml