JSF学习五Ajax

来源：互联网发布：金瑞泰集团数据编辑：程序博客网时间：2024/05/16 11:38

验证用户名(不能有下划线)和密码（不能小于六位）

1.UserBean.java

package ajax;import java.io.Serializable;import javax.faces.application.FacesMessage;import javax.faces.bean.ManagedBean;import javax.faces.bean.SessionScoped;import javax.faces.component.UIComponent;import javax.faces.context.FacesContext;import javax.faces.validator.ValidatorException;@ManagedBean(name="ajax")@SessionScopedpublic class UserBean implements Serializable {private String name="";private String password;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public void validateName(FacesContext fc,UIComponent c,Object value){if(((String)value).contains("_")){throw new ValidatorException(new  FacesMessage("Name cannot contain underscores!"));}}public void validatePassword(FacesContext fc,UIComponent c,Object value){if(((String)value).length()<6){throw new ValidatorException(new  FacesMessage("Password at least six words!"));}}}

2.hello.xhtml

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.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:head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Insert title here</title></h:head><h:body><h:form><p><h:outputText value="Name"/><h:inputText id="name" value="#{ajax.name}" validator="#{ajax.validateName}"><f:ajax event="blur" execute="@this" render="nameError"/></h:inputText><h:message for="name" id="nameError" style="color:red" /></p><h:outputText value="Password"/><h:inputSecret id="password" value="#{user.password}" validator="#{ajax.validatePassword}"><f:ajax event="blur" render="passwordError"/></h:inputSecret><h:message for="password" id="passwordError" style="color:red" /></h:form></h:body></html>

3.运行结果如下

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