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[b]Struts2提供了校验机制，一些基本的配置信息如下：[/b][/color][/size]
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd"><!-- START SNIPPET: fieldValidatorsExample --> <validators> <field name="requiredValidatorField"> <field-validator type="required"> <message><![CDATA[ 必填 ]]></message> </field-validator> </field> <field name="requiredStringValidatorField"> <field-validator type="requiredstring"> <param name="trim">true</param> <message><![CDATA[ 必填而且必须是字符串 ]]></message> </field-validator> </field> <field name="integerValidatorField"> <field-validator type="int"> <param name="min">1</param> <param name="max">10</param> <message><![CDATA[ 要求>= 1而且<=10 ]]></message> </field-validator> </field> <field name="dateValidatorField"> <field-validator type="date"> <param name="min">01/01/1990</param> <param name="max">01/01/2000</param> <message><![CDATA[ 必须在1990年1月1日到2000年1月1日之间 ]]></message> </field-validator> </field> <field name="emailValidatorField"> <field-validator type="email"> <message><![CDATA[ 必须是合法的email地址 ]]></message> </field-validator> </field> <field name="urlValidatorField"> <field-validator type="url"> <message><![CDATA[ 必须是合法的URL ]]></message> </field-validator> </field> <field name="stringLengthValidatorField"> <field-validator type="stringlength"> <param name="maxLength">4</param> <param name="minLength">2</param> <param name="trim">true</param> <message><![CDATA[ 字符串长度必须大于1小于5 ]]></message> </field-validator> </field> <field name="regexValidatorField"> <field-validator type="regex"> <param name="expression">.*\.txt</param> <message><![CDATA[ 必须匹配正则表达式 (.*\.txt) ]]></message> </field-validator> </field> <field name="fieldExpressionValidatorField"> <field-validator type="fieldexpression"> <param name="expression">(fieldExpressionValidatorField == requiredValidatorField)</param> <message><![CDATA[ 必须和必填字段值一致 ]]></message> </field-validator> </field></validators>
