Struts 2 - 基于 XML 的验证器
以下是 Struts2 中可用的各种字段级和非字段级验证类型的列表 −
日期验证器
<field name = "birthday"> <field-validator type = "date"> <param name = "min">01/01/1990</param> <param name = "max">01/01/2000</param> <message> Birthday must be within ${min} and ${max} </message> </field-validator> </field>
双重验证器
<field name = "percentage"> <field-validator type = "double"> <param name = "minExclusive">0.123</param> <param name = "maxExclusive">99.98</param> <message> Percentage needs to be between ${minExclusive} ${maxExclusive} (exclusive) </message> </field-validator> </field>
email 验证器
<field name = "myEmail"> <field-validator type = "email"> <message> Must provide a valid email </message> </field-validator> </field>
表达式验证器
根据提供的正则表达式进行验证的非字段级验证器。
<field-validator type = "expression"> <param name = "expression">....</param> <message> Failed to meet Ognl Expression .... </message> </field-validator>
int 验证器
<field name = "age"> <field-validator type = "int"> <param name = "min">5</param> <param name = "max">50</param> <message> Age needs to be between ${min} and ${max} </message> </field-validator> </field>
正则表达式验证器
<field name = "myStrangePostcode"> <field-validator type = "regex"> <param name = "fieldName">myStrangePostcode</param> <param name = "expression"> <![CDATA[([aAbBcCdD][123][eEfFgG][456])]]> </param> </field-validator> </field>
必需验证器
<field name = "username"> <field-validator type = "required"> <message> username must not be null </message> </field-validator> </field>
必填字符串验证器
<field name = "username"> <field-validator type = "requiredstring"> <param name = "trim">true</param> <message> username must not be null </message> </field-validator> </field>
字符串长度验证器
<field name = "username"> <field-validator type = "stringlength"> <param name = "minLength">10</param> <param name = "maxLength">10</param> <param name = "trim">true</param> <message> Your username needs to be 10 characters long </message> </field-validator> </field>
url validator
<field-validator type = "url"> <param name = "fieldName">myHomePageURL</param> <message> Invalid homepage url </message> </field-validator>