Struts2.x快速上手7--声明式验证(validation.xml)

1)logon.jsp
?使用struts2标记

?

2)在Action下添加同名的校验配置

LogonAction-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="username">
??<field-validator type="requiredstring">
???<message key="username.required"></message>
??</field-validator>
?</field>
?<field name="password">
??<field-validator type="requiredstring">
???<message key="password.required"></message>
??</field-validator>
?</field>
</validators>