如何在java中使用GPX解析器获取GPX文件的分数？

Question

＆＃13;

＆＃13;

import java.awt.Point;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;

import javax.xml.parsers.ParserConfigurationException;

import org.alternativevision.gpx.GPXParser;
import org.alternativevision.gpx.beans.GPX;
import org.alternativevision.gpx.beans.Track;
import org.alternativevision.gpx.beans.Waypoint;
import org.xml.sax.SAXException;

public class PointParser {
	private static Double latitude;
	private static Double longitude;
	private static Double elevation;
	private static Date time;

	public static void main (String[] args) throws ParserConfigurationException, SAXException, IOException{
		FileInputStream input = new FileInputStream("E:\\sample.gpx");
		GPXParser parser = new GPXParser();
		GPX gpx = parser.parseGPX(input);
		Track trk = new Track();
		ArrayList<Waypoint> trkpt = trk.getTrackPoints();
		Object[] pointArray = trkpt.toArray();
		for (Object o : pointArray){
			Point p = (Point) o;
		}
		Waypoint wp = new Waypoint();
		latitude = wp.getLatitude();
		longitude = wp.getLongitude();
		elevation = wp.getElevation();
		time = wp.getTime();
	}
	public static Double getLatitude() {
		return latitude;
	}

	public static void setLatitude(Double latitude) {
		PointParser.latitude = latitude;
	}

	public static Double getLongitude() {
		return longitude;
	}

	public static void setLongitude(Double longitude) {
		PointParser.longitude = longitude;
	}

	public static Double getElevation() {
		return elevation;
	}

	public static void setElevation(Double elevation) {
		PointParser.elevation = elevation;
	}

	public static Date getTime() {
		return time;
	}

	public static void setTime(Date time) {
		PointParser.time = time;
	}

	
}

＆＃13;

＆＃13;

＆＃13;

您好， 我是java和GPXparser库的新手。我有一个包含一些跟踪点的GPX文件。我想从这个文件中提取经度，纬度，时间和高程的4个元素，并在我的java代码中的另一个类的算法中使用它。当我运行它时，我看到了这个错误：

＆＃34;在PointParser.main（PointParser.java:23） 引起：java.lang.ClassNotFoundException：org.apache.log4j.Logger＆＃34;

任何人都可以帮我吗？我使用的是GPXparser correclty吗？！

提前谢谢