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struts框架校验

struts框架校验步骤:

在Action的相同目录下创建xml文件(命名规则为:Action名-validation.xml)

编辑xml文件：(LoginAction-validation.xml)

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE validators PUBLIC
 3         "-//Apache Struts//XWork Validator 1.0.2//EN"
 4         "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
 5 
 6 <validators>
 7     <field name="username">
 8         <field-validator type="requiredstring">
 9             <message>姓名不能为空!</message>
10         </field-validator>
11     </field>
12     <field name="age">
13         <field-validator type="required">
14             <message>年龄不能为空!</message>
15         </field-validator>
16         <field-validator type="int">
17             <param name="min">18</param>
18             <param name="max">33</param>
19             <message>年龄要介于18到33之间!</message>
20         </field-validator>
21     </field>
22 </validators>

其中一个<field>标签对应Action里面的一个属性,<field-validator>标签对应的是struts内置的校验器,这些标签可以在以下地方找到:(其中name属性对应的都是java里面的setXXX的XXX属性名)

打开此包，在default.xml下可以找到标签属性对应的校验器:

default.xml:

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE validators PUBLIC
 3         "-//Apache Struts//XWork Validator Definition 1.0//EN"
 4         "http://struts.apache.org/dtds/xwork-validator-definition-1.0.dtd">
 5 
 6 <!-- START SNIPPET: validators-default -->
 7 <validators>
 8     <validator name="required" class="com.opensymphony.xwork2.validator.validators.RequiredFieldValidator"/>
 9     <validator name="requiredstring" class="com.opensymphony.xwork2.validator.validators.RequiredStringValidator"/>
10     <validator name="int" class="com.opensymphony.xwork2.validator.validators.IntRangeFieldValidator"/>
11     <validator name="long" class="com.opensymphony.xwork2.validator.validators.LongRangeFieldValidator"/>
12     <validator name="short" class="com.opensymphony.xwork2.validator.validators.ShortRangeFieldValidator"/>
13     <validator name="double" class="com.opensymphony.xwork2.validator.validators.DoubleRangeFieldValidator"/>
14     <validator name="date" class="com.opensymphony.xwork2.validator.validators.DateRangeFieldValidator"/>
15     <validator name="expression" class="com.opensymphony.xwork2.validator.validators.ExpressionValidator"/>
16     <validator name="fieldexpression" class="com.opensymphony.xwork2.validator.validators.FieldExpressionValidator"/>
17     <validator name="email" class="com.opensymphony.xwork2.validator.validators.EmailValidator"/>
18     <validator name="url" class="com.opensymphony.xwork2.validator.validators.URLValidator"/>
19     <validator name="visitor" class="com.opensymphony.xwork2.validator.validators.VisitorFieldValidator"/>
20     <validator name="conversion" class="com.opensymphony.xwork2.validator.validators.ConversionErrorFieldValidator"/>
21     <validator name="stringlength" class="com.opensymphony.xwork2.validator.validators.StringLengthFieldValidator"/>
22     <validator name="regex" class="com.opensymphony.xwork2.validator.validators.RegexFieldValidator"/>
23     <validator name="conditionalvisitor" class="com.opensymphony.xwork2.validator.validators.ConditionalVisitorFieldValidator"/>
24 </validators>
25 <!--  END SNIPPET: validators-default -->

在eclipse中Debug Web项目:

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原文地址：https://www.cnblogs.com/hanyuan/p/validate_in_struts2.html