PrimeFaces Ajax验证示例 _Ajax验证

PrimeFaces提供验证标签以在服务器端验证我们的数据。 < p：ajax> 用于执行Ajax验证。在这里, 我们正在创建一个示例, 该示例接受两个输入并在服务器端进行验证。
本示例包括以下文件。
JSF文件
// ajax-validation.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://xmlns.jcp.org/jsf/html"xmlns:p="http://primefaces.org/ui"xmlns:f="http://xmlns.jcp.org/jsf/core"> < h:head> < title> ajax-validation< /title> < /h:head> < h:body> < h:form> < p:panel id="panel-id" header="Add a User"> < p:messages id="msgs" /> < h:panelGrid columns="3" cellpadding="5"> < p:outputLabel for="firstname" value="http://www.srcmini.com/Firstname:" /> < p:inputText id="firstname" value="http://www.srcmini.com/#{ajaxValidation.firstname}" required="true" label="Firstname"> < f:validateLength minimum="2" /> < /p:inputText> < p:message for="firstname" display="icon" /> < p:outputLabel for="lastname" value="http://www.srcmini.com/Lastname:" /> < p:inputText id="lastname" value="http://www.srcmini.com/#{ajaxValidation.lastname}" label="Lastname" required="true"> < f:validateLength minimum="2" /> < p:ajax update="msgLastname" event="keyup" /> < /p:inputText> < p:message for="lastname" id="msgLastname" display="icon" /> < /h:panelGrid> < p:commandButton value="http://www.srcmini.com/Save" update="panel-id" actionListener="#{ajaxValidation.save}" icon="ui-icon-check" /> < /p:panel> < /h:form> < /h:body> < /html>

ManagedBean
// AjaxValidation.java

package com.srcmini; import javax.faces.application.FacesMessage; import javax.faces.bean.ManagedBean; import javax.faces.context.FacesContext; @ManagedBeanpublic class AjaxValidation {private String firstname; private String lastname; public String getFirstname() {return firstname; }public void setFirstname(String firstname) {this.firstname = firstname; }public String getLastname() {return lastname; }public void setLastname(String lastname) {this.lastname = lastname; }public void save() {FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("Welcome " + firstname + "" + lastname)); }}

执行后将产生以下输出。
输出