<f:validateRegex>
标签用于将字符串值验证为所需格式。
以下代码显示如何使用<f:validateRegex>
标记。
<f:validateRegex pattern="((?=.*[a-z]).{6,})" />
属性 | 说明 |
---|---|
pattern | 格式化模式 |
打开 NetBeans IDE 创建一个Web工程:ValidateRegularExpression,其目录结构如下所示 -
创建以下文件代码,文件:index.xhtml 的代码内容如下所示 -
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core"> <h:body> <h:form> <h:panelGrid columns="3"> Enter your password : <h:inputSecret id="password" value="#{user.password}" size="20" required="true" label="Password"> <f:validateRegex pattern="\d\d\d\d" /> </h:inputSecret> <h:message for="password" style="color:red" /> </h:panelGrid> <h:commandButton value="Submit" action="result" /> </h:form> </h:body> </html>
文件:result.xhtml 的代码内容如下所示 -
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:c="http://java.sun.com/jsp/jstl/core" > <h:body> <h:panelGrid columns="2"> Password : <h:outputText value="#{user.password}" /> </h:panelGrid> </h:body> </html>
文件:User.java 的代码内容如下所示 -
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.zyiz; /** * * @author Maxsu */ import java.io.Serializable; import javax.faces.bean.ManagedBean; import javax.faces.bean.SessionScoped; @ManagedBean(name = "user") @SessionScoped public class User implements Serializable { String password; public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
右键运行工程:ValidateRegularExpression,如果没有任何错误,打开浏览器访问:
http://localhost:8084/ValidateRegularExpression/
应该会看到以下结果 -
简单写入一些信息(密码要求必须是4
位整数),然后提交 -