JSF驗證正規表示式


<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,})" />

標籤屬性

屬性 說明
pattern 格式化模式

JSF驗證整數範圍範例

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 -