JavaEE学习记录二：Struts2框架对数据进行校验

最新推荐文章于 2021-03-06 12:16:03 发布

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最新推荐文章于 2021-03-06 12:16:03 发布

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本文链接：https://blog.youkuaiyun.com/Tensor6689/article/details/104738247

这篇博客详细介绍了Struts2框架中常用的九种数据校验规则，包括必填检验、必填字符串检验、整数和浮点检验、日期检验、字段表达式检验、邮件地址校验、网址校验、字符串长度检验以及正则表达式检验，并提供了相应的XML配置示例。

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一、常用的验证规则：

1.必填检验
<validators>

<field name="username">
<field-validator type="required">
<message>指定检验失败的提示信息</message>
</field-validator>
</field>
</validators>

2.必填字符串检验
<validators>
<field name="username">
<field-validator type="requiredstring">
<param name="trim">true</param>
<message>指定检验失败的提示信息</message>
</field-validator>
</field>
</validators>

3.整数检验器/浮点检验
<validators>
<field name="age">
<field-validator type="int">
<param name="min">1</param>
<param name="max">150</param>
<message>年纪必须在1到150之间</message>
</field-validator>
</field>

</validators>

4.日期检验
<validators>
<field name="birth">
<field-validator type="date">
<param name="min">1900-01-01</param>
<param name="max">2050-02-21</param>
<message key="birth.range"/>
</field-validator>
</field>
</validators>

5.字段表达式检验器(要求指定字段满足一个逻辑表达式)
<validators>
<field name="re_pass">

<field-validator type="fieldexpression">

<param name="expression"> (pass eq re_pass)</param>
<message>密码必须和确认密码相等</message>
</field-validator>
</field>
</validators>

6.邮件地址校验
<validators>
<field name="email">
<field-validator type="email">
<message>你的电子邮件地址必须是一个有效的电邮地址</message>
</field-validator>
</field>
</validators>

7.网址检验
<validators>
<field name="url">
<field-validator type="url">
<message>你的主页地址必须是一个有效的网址</message>
</field-validator>
</field>
</validators>

8.字符串长度检验
<validators>
<field name="user">

<field-validator type="stringlength">
<param name="minlength">4</param>
<param name="maxlength">20</param>
<message>你的用户名长度必须在4到20之间</message>
</field-validator>
</field>
</validators>

9.正则表达式检验
<validators>
<field name="user">
<field-validator type="regex">
<param name="regexExpression"><![CDATA[(\w{4,25})]]></param>

<message>您输入的用户名只能是字母和数组，且长度必须在4到25之间</message>
</field-validator>
</field>
</validators

二、示例

Action-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC    
"-//Apache Struts//XWork Validator 1.0.2//EN" 
"http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
<validators>
  	<field name="student.sno">
        	<field-validator type="requiredstring">
        	<!-- 去空格 -->
        	<param name="trim">true</param>
        	<message>学号不能为空！</message>
        	</field-validator>
        	<field-validator type="regex">
            <param name="regexExpression">[0-9]{14}</param>
            <message>学号必须为14位数字字符！</message>
            </field-validator>
   	  </field>
   	  <field name="student.sname">
        	<field-validator type="requiredstring">
        	<!-- 去空格 -->
        	<param name="trim">true</param>
        	<message>姓名不能为空！</message>
        	</field-validator>
   	  </field>
  	  <field name="student.birth">
  	  		<field-validator type="required">
        	<!-- 去空格 -->
        	<param name="trim">true</param>
        	<message>出生日期不能为空！</message>
        	</field-validator>
    		<field-validator type="date">
    		<param name="min">1990-01-01</param>
    		<param name="max">2020-12-30</param>
    		<message>出生日期必须在1990-01-01至2020-12-30之间</message>
   	 		</field-validator>
  	  </field>
  	  <field name="student.major">
        	<field-validator type="requiredstring">
        	<!-- 去空格 -->
        	<param name="trim">true</param>
        	<message>专业不能为空！</message>
        	</field-validator>
   	  </field>
       	<field name="student.score">
       		<field-validator type="required">
        	<!-- 去空格 -->
        	<param name="trim">true</param>
        	<message>成绩不能为空！</message>
        	</field-validator>
    		<field-validator type="int">
    		<param name="min">0</param>
    		<param name="max">100</param>
    		<message>成绩必须在0到100之间</message>
    		</field-validator>
   	  </field>
</validators>