云计算大作业（计算北京城区出租车数量以及车辆位置点数）

作业（计算北京城区出租车数量以及车辆位置点数）"/>

云计算大作业（计算北京城区出租车数量以及车辆位置点数）

工程目录如下

package org.example.Bean;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
//如果没有lombok插件的，将下列注释改写成getter,setter，和相应的构造方法
@Data
@NoArgsConstructor
@AllArgsConstructor
public class DistrictBean {private String DistrictName;//城区名字private double longitude;//经度private double latitude;//纬度private double Radius;//城区半径@Overridepublic String toString () {return "城区名称为: "+DistrictName+" 中心坐标为: ("+longitude+","+latitude+")  " +""+" 半径为: "+Radius+"km\n";}}

package org.example.Bean;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.stereotype.Component;/*** 城区类*/
@Data
@AllArgsConstructor
@NoArgsConstructor
public class TaxiInDistrictBean {private String DistrictName;//城区名字private Integer TaxiCountInEachDis;//每个城区的出租车点数@Overridepublic String toString () {return DistrictName+": 有车辆位置点数  "+TaxiCountInEachDis+" 个";}
}

package org.example.Bean;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;/*** 经纬度类*/
@Data
@AllArgsConstructor
@NoArgsConstructor
public class TaxiAddress {private double longitude;//经度private double latitude;//纬度
}

package org.example.Controller;import org.example.Bean.DistrictBean;
import org.example.Bean.TaxiInDistrictBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;import java.io.*;
import java.util.*;public class TaxiNumberController {private double EARTH_R = 6371.137;//地球半径private FileReader taxiReader;private FileReader districtReader;private BufferedReader taxiBr;private BufferedReader districtBr;private String config = "ApplicationContext.xml";ApplicationContext context = new ClassPathXmlApplicationContext(config);//出租车的数量public String getNumber () {File file = (File) context.getBean("taxi_gps");ArrayList<String> taxiList = new ArrayList<>();//出租车的数量try {FileReader reader = new FileReader(file);BufferedReader br = new BufferedReader(reader);String s = null;int taxiCount = 0;while ((s = br.readLine()) != null) {String[] split = s.split(",");for (int i = 0; i < split.length; i++) {int taxiNumber = Integer.parseInt(split[0]);if (!taxiList.contains(split[0])) {//去重，如果集合中包含了这个数据，就继续下一步循环taxiList.add(split[0]);//如果没有包含这个车辆编号，则将车辆编号添加的集合中}}}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return "该出租车GPS数据文件包含" + taxiList.size() + "量车";}//北京城区的区public void District () {File district = (File) context.getBean("district");ArrayList<DistrictBean> districtBeans = new ArrayList<>();List<Map<String, DistrictBean>> districtMap = new ArrayList<>();try {FileReader reader = new FileReader(district);BufferedReader br = new BufferedReader(reader);int i = 1;String s = null;while ((s = br.readLine()) != null) {String[] split = s.split(",");org.example.Bean.DistrictBean districtBean = new DistrictBean(split[0],(double) Double.parseDouble(split[1]), Double.parseDouble(split[2]),Double.parseDouble(split[3]));districtBeans.add(districtBean);Map<String, DistrictBean> map = new HashMap<>();map.put("D" + i + "区", districtBean);districtMap.add(map);i++;}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}int i = 1;for (DistrictBean bean : districtBeans) {System.out.println("D" + i + "区: " + bean.getDistrictName() +" 中心坐标为: (" + bean.getLongitude() + "," + bean.getLatitude() +") 半径为: " + bean.getRadius() + "km");i++;}}//每个城区的车辆位置点数public void taxiAddress () {List<Map<String, List<String>>> TaxiInDList = new ArrayList<>();//Map中的第一个参数是城区名字，第二参数是在这个区内车辆的集合数量构成的集合List<Map<String, Integer>> maps = new ArrayList<>();//Map中的第一个参数是城区名字，第二个参数是出租车的位置点数List<TaxiInDistrictBean> taxiInDistrictBeanList = new ArrayList<>();File taxi = (File) context.getBean("taxi_gps");File district = (File) context.getBean("district");try {districtReader = new FileReader(district);districtBr = new BufferedReader(districtReader);//将读取的数据全部存放到数组中String districtS = null;while ((districtS = districtBr.readLine()) != null) {taxiReader = new FileReader(taxi);taxiBr = new BufferedReader(taxiReader);List<String> taxiList = new ArrayList<>();//                    城区经纬度数据的下表分别是1，2String[] splitDistrict = districtS.split(",");String DistrictName = splitDistrict[0];//城区的名字double district_longitude = Double.parseDouble(splitDistrict[1]);//城区的经度double district_latitude = Double.parseDouble(splitDistrict[2]);//陈回去的纬度double district_Radius = Double.parseDouble(splitDistrict[3]);String taxiS = null;while ((taxiS = taxiBr.readLine()) != null) {//出租车数据经纬度的下标分别是4，5String[] splitTaxi = taxiS.split(",");String taxiNumber = splitTaxi[0];//获取出租车的编号double taxi_longitude = Double.parseDouble(splitTaxi[4]);//获取出租车的经度double taxi_latitude = Double.parseDouble(splitTaxi[5]);//获取出租车的纬度
//                    double longitude = taxi_longitude - district_longitude;
//                    double latitude = taxi_latitude - district_latitude;
//                    double distance1 = Math.hypot(longitude, latitude);
//                    //知道了经纬度的差
//                    double x = (taxi_longitude - district_longitude) * Math.PI * EARTH_R *
//                            Math.cos(((taxi_latitude - district_latitude) / 2)
//                                    * Math.PI / 100) / 180;
//                    double y = (taxi_latitude - district_latitude) * Math.PI * EARTH_R / 180;
//                    double r = Math.hypot(x, y) / 1000;//x与y之间的距离
//                    double distance = 0;
//                    double rad_taxi_latitude = getRad(taxi_latitude);
//                    double rad_district_latitude = getRad(district_latitude);
//                    double dis1 = rad_taxi_latitude - rad_district_latitude;
//                    double dis2 = getRad(taxi_longitude) - getRad(district_longitude);
//                    distance = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(dis1 / 2), 2) +
//                            Math.cos(taxi_latitude) * Math.cos(district_latitude) *
//                                    Math.pow(Math.sin(dis2 / 2), 2)));
//                    distance = distance * EARTH_R;
//                    distance = Math.round(distance * 10000d) / 10000d;double mindistance = getDistance(district_longitude,district_latitude,taxi_longitude,taxi_latitude);if (mindistance < district_Radius) {taxiList.add(taxiNumber);}}Map<String, List<String>> districtmap = new HashMap<>();districtmap.put(DistrictName, taxiList);TaxiInDList.add(districtmap);Map<String, Integer> map = new HashMap<>();map.put(DistrictName, taxiList.size());maps.add(map);}} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}for (Map<String, Integer> map : maps) {Set<String> strings = map.keySet();for (String s : strings) {TaxiInDistrictBean districtBean = new TaxiInDistrictBean(s, map.get(s));taxiInDistrictBeanList.add(districtBean);}}for (TaxiInDistrictBean inDistrictBean : taxiInDistrictBeanList) {System.out.println(inDistrictBean);}
//        System.out.println(taxiInDistrictBeanList.toString());
//        return taxiInDistrictBeanList.toString();}//将经纬度转换成弧度public double getRad (double x) {return x * Math.PI / 180;}private static final double EARTH_RADIUS = 6378.137;public double getDistance(double longitude1, double latitude1, double longitude2, double latitude2) {double Lat1 = rad(latitude1);double Lat2 = rad(latitude2);double a = Lat1 - Lat2;double b = rad(longitude1) - rad(longitude2);double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2)+ Math.cos(Lat1) * Math.cos(Lat2)* Math.pow(Math.sin(b / 2), 2)));s = s * EARTH_RADIUS;s = Math.round(s * 10000d) / 10000d;return s;}private double rad(double d) {return d * Math.PI / 180.0;}}

package org.example;import org.example.Controller.TaxiNumberController;public class Main{public static void main( String[] args ) {//调用方法TaxiNumberController controller = new TaxiNumberController();//出租车的数量System.out.println("taxi_gps文件的出租车数量");String Taxinumber = controller.getNumber();System.out.println(Taxinumber);System.out.println("-------------------------------------");System.out.println();System.out.println("北京市各个区的信息");//每个城区的信息controller.District();System.out.println("--------------------------------------");System.out.println();System.out.println("每个区的车辆位置点数");//每个城区的车辆位置数量controller.taxiAddress();}}

运行结果如下

自行运行结果