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struts2的框架驗(yàn)證分為字段驗(yàn)證和非字段驗(yàn)證。這其中非字段驗(yàn)證將在所有的字段驗(yàn)證之前執(zhí)行。

下面是一個(gè)驗(yàn)證文件

<validators>

    <!--

    <validator type="requiredstring" short-circuit="true">

       <param name="fieldName">name</param>

       <message>姓名不能為空!!</message>validator也能驗(yàn)證字段，用field本可以很好解決，加了一個(gè)validator反而使用容易產(chǎn)生迷惑，并且validator在驗(yàn)證的時(shí)候配置起來(lái)并沒(méi)有field那么清晰易懂，多出這個(gè)驗(yàn)證手段有點(diǎn)費(fèi)解。

    </validator>

    -->

    <field name="name">

       <!-- 

       <field-validator type="required" short-circuit="true">

           <message>姓名不能為null</message>

       </field-validator>

       -->有了requiredstring驗(yàn)證，這里的驗(yàn)證null的就不需要了。在什么情況下需要驗(yàn)證為null呢？又不需要驗(yàn)證為空呢？

 

       <field-validator type="requiredstring" short-circuit="true">

           <param name="trim">true</param>

           <message>姓名不能為空</message>

       </field-validator>

 

       <field-validator type="stringlength">

           <param name="minLength">6</param>

           <param name="maxLength">36</param>

           <param name="trim">true</param>

           <message>姓名的長(zhǎng)度在${minLength}和${maxLength}之間</message>

       </field-validator>

    </field>

 

    <field name="age">

       <field-validator type="int">

           <param name="min">18</param>

           <param name="max">68</param>

           <message>年齡請(qǐng)?jiān)?/span> ${min}和 ${max}之間</message>

       </field-validator>

    </field>

 

    <field name="date">
        <field-validator type="required" short-circuit="true">
            <message>日期不能為空</message>
        </field-validator>
  
        <field-validator type="date">
            <param name="min">2001-01-01</param>
            <param name="max">2009-12-31</param>
            <message>日期必須在${minLength}和${maxLength}之間</message>
        </field-validator>
    </field>

 

    <field name="email">     

       <field-validator type="requiredstring" short-circuit="true">

           <param name="trim">true</param>

           <message>Email不能為空</message>

       </field-validator>

 

       <field-validator type="stringlength" short-circuit="true">

           <param name="minLength">0</param>

           <param name="maxLength">50</param>

           <param name="trim">true</param>

           <message>您輸入的email地址過(guò)長(zhǎng)了，最大長(zhǎng)度為${maxLength}</message>

       </field-validator>

 

       <field-validator type="email">

           <message>Email格式不正確</message>

       </field-validator>

    </field>

 

    <field name="psw">

       <field-validator type="requiredstring" short-circuit="true">

           <param name="trim">true</param>

           <message>密碼還沒(méi)有填寫(xiě)</message>

       </field-validator>

 

       <field-validator type="stringlength">

           <param name="minLength">6</param>

           <param name="maxLength">16</param>

           <param name="trim">true</param>

           <message>密碼長(zhǎng)度應(yīng)大于${minLength},小于${maxLength}</message>

       </field-validator>

    </field>

    <field name="repsw">

       <field-validator type="requiredstring" short-circuit="true">

           <param name="trim">true</param>

           <message>重復(fù)密碼還沒(méi)有填寫(xiě)</message>

       </field-validator>

       <field-validator type="fieldexpression">

           <param name="expression">repsw==psw</param>

           <message>兩次輸入的密碼不相同</message>

       </field-validator>

    </field>

    <!--

    <validator type="expression" short-circuit="true">

       <param name="expression">repsw==psw</param>

       <message>兩次輸入的密碼不相同</message>

    </validator> 

    -->validator的非字段驗(yàn)證是首先要被驗(yàn)證框架執(zhí)行的，也就是說(shuō)要先于字段驗(yàn)證執(zhí)行。這里就要注意了哦，如果設(shè)置short-circuit="true"，那結(jié)果會(huì)很難看，因?yàn)槭紫仁撬鼒?zhí)行，然后短路了，所以后面的驗(yàn)證都執(zhí)行不了了。如果使用這個(gè)驗(yàn)證器是驗(yàn)證密碼是否相同，錯(cuò)誤結(jié)果會(huì)在ActionError中顯示，這個(gè)是我們不希望看到的，所以這里使用fieldexpression。

 

</validators>