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i am using primefaces library this is my jsp page source:

<%@taglib uri="http://primefaces.prime.com.tr/ui" prefix="p"%>
<%@taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<f:view>
<head>
  <p:resources />
  <base href="<%=basePath%>">

  <title>My JSP 'index.jsp' starting page</title>
</head>

<body>

   <h:form>
    <h:outputText id="txt_count" value="#{counterBean.count}" />
    <p:poll actionListener="#{counterBean.increment}" update="txt_count" />
   </h:form>

</body>

  </f:view>
</html>

and my back bean code is :

import javax.faces.event.ActionEvent;


public class CounterBean {
private int count;
public void increment(ActionEvent actionEvent) {
count++;
}
//getters and setters
public int getCount() {
 return count;
}
public void setCount(int count) {
 this.count = count;
}
}

my web.xml is as follows

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>0</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>*.faces</url-pattern>
  </servlet-mapping>
  <servlet>
<servlet-name>Resource Servlet</servlet-name>
<servlet-class>org.primefaces.resource.ResourceServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Resource Servlet</servlet-name>
<url-pattern>/primefaces_resource/*</url-pattern>
</servlet-mapping>
  <welcome-file-list>
    <welcome-file>test.jsp</welcome-file>
  </welcome-file-list>
</web-app>

my pages loads correctly but it's not regulary updated

when it is loaded it says that "yahoo is not defined" and so it does not work.

i have defined resources servlet and but it does not work yet!

please help me!

4

1 回答 1

3

您显然在 JSF 2.0 上使用 PrimeFaces 2.0。在JSF 2.0p:resources中已弃用。您应该使用 Facelets 而不是 JSP。如果一切正常,您应该在服务器日志中看到以下条目:

信息:p:resources 组件已弃用,在 PrimeFaces 2.0 中没有用
      而是使用 JSF 2.0 资源 API 在页面上放置资源。

由于页面中不包含资源,因此不包含所需的 JavaScript 文件,并且生成的 JavaScript 代码找不到 Yahoo 库引用,因此您检索到的 JS 错误。如果您在浏览器中右键单击网页并检查了生成的 HTML 源代码,您应该也注意到缺少<script>包含。

要解决此问题,请永远转储JSP 并使用 Facelets。它是 JSP 的继承者,并且在将 JSF 纳入图片时要优越得多。

*.jsp将文件重命名为*.xhtml并使用以下代码:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" 
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:p="http://primefaces.prime.com.tr/ui">
    <h:head>
        <title>My Facelets 'index.xhtml' starting page</title>
        <base href="//#{request.serverName}:#{request.serverPort}#{request.contextPath}"></base>
    </h:head>
    <h:body>
       <h:form>
           <h:outputText id="txt_count" value="#{counterBean.count}" />
           <p:poll actionListener="#{counterBean.increment}" update="txt_count" />
       </h:form>
    </h:body>
</html>

在阅读 JSF 书籍/教程时,请确保您阅读的是涵盖 JSF 2.0 而不是 1.x 的书籍。

于 2010-07-12T20:35:15.270 回答