struts2验证框架的两种方式

最新推荐文章于 2020-04-22 11:12:29 发布

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本文详细介绍了Struts2框架中的两种验证方式：第一种是在Action同目录下创建action-validation.xml进行验证配置；第二种则是结合POJO的方式，在Action同目录及POJO目录下分别创建action-validation.xml与action-cpojo-validation.xml进行验证。文章通过具体示例展示了如何对用户输入的姓名和年龄等字段进行必填项检查以及年龄范围限制。

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第一种（在action同目录下建立 action-validation.xml）
<?xml version="1.0" encoding="UTF-8"?>
<!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="user.firstname">
<field-validator type="requiredstring">
<message>required first name</message>
</field-validator>
</field>

<field name="user.lastname">
<field-validator type="requiredstring">
<message>required last name</message>
</field-validator>
</field>

<field name="user.age">
<field-validator type="required">
<message>required age</message>
</field-validator>
<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>
</validators>

第二种（在action同目录下建立 action-validation.xml，pojo下寻立action-cpojo-validation.xml）
action-validation.xml
<?xml version="1.0" encoding="UTF-8"?>
<!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="user">
<field-validator type="visitor">
<param name="context">user</param>
<param name="appendPrefix">true</param>
<message>user's </message>
</field-validator>
</field>
</validators>

action-cpojo-validation.xml
<?xml version="1.0" encoding="UTF-8"?>
<!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="firstname">
<field-validator type="requiredstring">
<message>required first name</message>
</field-validator>
</field>

<field name="lastname">
<field-validator type="requiredstring">
<message>required last name</message>
</field-validator>
</field>

<field name="age">
<field-validator type="required">
<message>required age</message>
</field-validator>
<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>

</validators>