Struts validator 验证简介

要用validator验证框架首先要在WEB-INF文件夹下建立一个名为validation.xml（必须为此名）的文件。

validation.xml文件

<? xml version = "1.0" encoding = "UTF-8" ?>

<! DOCTYPE form-validation PUBLIC

"-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.1.3//EN"

"http://jakarta.apache.org/commons/dtds/validator_1_1_3.dtd" >

< form-validation >

< global >

< constant >

< constant-name > phone </ constant-name >

< constant-value > ^/d{8}$ </ constant-value >

</ constant >

</ global >

< formset >

< form name = "userForm" >

< field property = "userName" depends = "required" >

<!-- field 中 depends 表示 validator-rulers.xml 中以定义好的方法 -->

< msg name = "required" key = "userName" resource = "true" />

<!-- msg 中 resource 表示是否从 properties 文件中读取提示信息 -->

</ field >

< field property = "userPwd" depends = "required,minlength" >

< msg name = "required" key = "mima bu neng wei kong !"

resource = "false" />

< msg name = "minlength" key = "chang du bu neng xiao yu 5!"

resource = "false" />

< var >

< var-name > minlength </ var-name >

< var-value > 5 </ var-value >

</ var >

</ field >

< field property = "userPwd" depends = "required" >

< msg name = "required" key = "mima bu neng wei kong !"

resource = "false" />

</ field >

</ form >

</ formset >

</ form-validation >

Jsp页面

<%@ page language = "java" pageEncoding = "gb2312" %>

<%@ taglib uri = "http://jakarta.apache.org/struts/tags-bean" prefix = "bean" %>

<%@ taglib uri = "http://jakarta.apache.org/struts/tags-html" prefix = "html" %>

< html >

< head >

< title > JSP for UserForm form </ title >

</ head >

< body >

<%-- <html:form action="/user">--%>

<%-- userName : <html:text property="userName"/><html:errors property="userName"/><br/>--%>

<%-- userPwd : <html:text property="userPwd"/><html:errors property="userPwd"/><br/>--%>

<%-- <html:submit/><html:cancel/>--%>

<%-- </html:form>--%>

< html:form action = "/user" >

userName : < html:text property = "userName" />< html:errors property = "userName" />< br />

userPwd : < html:text property = "userPwd" />< html:errors property = "userPwd" />< br />

< html:submit />< html:cancel />

</ html:form >

</ body >

</ html >

ApplicationResources.properties文件

# Resources for parameter 'com.yourcompany.struts.ApplicationResources'

# Project ValidateTest

userName= yong hu ming bu neng wei kong !