我在两个 IDE 中都尝试了以下 jsp 文件。它在 NetBeans 中运行良好，但在 Eclipse 中无法运行。该程序是从 NTP 服务器获取时间。
代码如下
<%--
Document : GetNTP
Created on : May 21, 2013, 2:21:29 PM
Author : Maximin
--%>
<%@page import="java.net.InetAddress"%>
<%@page import="java.text.SimpleDateFormat"%>
<%@page import ="java.util.Date"%>
<%@page import="org.apache.commons.net.ntp.NTPUDPClient"%>
<%@page import="org.apache.commons.net.ntp.TimeInfo"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1><%
String TIME_SERVER = "time.nist.gov";
NTPUDPClient timeClient = new NTPUDPClient();
InetAddress inetAddress = InetAddress.getByName(TIME_SERVER);
TimeInfo timeInfo = timeClient.getTime(inetAddress);
long returnTime = timeInfo.getReturnTime();
Date time = new Date(returnTime);
SimpleDateFormat sdf= new SimpleDateFormat("dd-MM-yyyy");
out.println(sdf.format(time));
%></h1>
</body>
</html>
当我在 Eclipse 中运行它时，我得到了
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 17 in the generated java file
Only a type can be imported. org.apache.commons.net.ntp.NTPUDPClient resolves to a package
An error occurred at line: 18 in the generated java file
Only a type can be imported. org.apache.commons.net.ntp.TimeInfo resolves to a package
An error occurred at line: 18 in the jsp file: /GetTime.jsp
NTPUDPClient cannot be resolved to a type
15: <body>
16: <h1><%
17: String TIME_SERVER = "time.nist.gov";
18: NTPUDPClient timeClient = new NTPUDPClient();
19: InetAddress inetAddress = InetAddress.getByName(TIME_SERVER);
20: TimeInfo timeInfo = timeClient.getTime(inetAddress);
21: long returnTime = timeInfo.getReturnTime();
为什么会这样？
我应该怎么做才能让它在 Eclipse 上运行？