<f:validateRegex>
標籤用於將字串值驗證為所需格式。
以下程式碼顯示如何使用<f:validateRegex>
標記。
<f:validateRegex pattern="((?=.*[a-z]).{6,})" />
屬性 | 說明 |
---|---|
pattern | 格式化模式 |
開啟 NetBeans IDE 建立一個Web工程:ValidateRegularExpression,其目錄結構如下所示 -
建立以下檔案程式碼,檔案:index.xhtml 的程式碼內容如下所示 -
<?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>
檔案:result.xhtml 的程式碼內容如下所示 -
<?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>
檔案:User.java 的程式碼內容如下所示 -
/*
* 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.yiibai;
/**
*
* @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;
}
}
右鍵執行工程:ValidateRegularExpression,如果沒有任何錯誤,開啟瀏覽器存取:
http://localhost:8084/ValidateRegularExpression/
應該會看到以下結果 -
簡單寫入一些資訊(密碼要求必須是4
位整數),然後提交 -