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f:validateRegex標(biāo)記用于將字符串值驗(yàn)證為必需的格式。
以下代碼顯示如何使用f:validateRegex標(biāo)記。
<f:validateRegex pattern="((?=.*[a-z]).{6,})" />
屬性 | 描述 |
---|---|
pattern | 格式化模式 |
以下代碼來自result.xhtml。
<?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>
下面的代碼來自UserBean.java。
package cn.w3cschool.common; import java.io.Serializable; import javax.faces.bean.ManagedBean; import javax.faces.bean.SessionScoped; @ManagedBean(name="user") @SessionScoped public class UserBean implements Serializable{ String password; public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } }
以下代碼來自demo.xhtml。
<?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>下載 Validate_regular_expression.zip
將生成的WAR文件從目標(biāo)文件夾復(fù)制到Tomcat部署文件夾,并運(yùn)行Tomcat-Install-folder/bin/startup.bat。
Tomcat完成啟動(dòng)后,在瀏覽器地址欄中鍵入以下URL。
http://localhost:8080/simple-webapp/demo.xhtml
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