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lizijie

2020-12-17 11999481fbcdacd6425217cd89c21ac17579ea7a

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package com.moral.util;
 
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
public class WindUtils {
 
    /**
     *@Description: 根据方向和风速，获取UV风向
     * @return:                                                                <                                                               com.moral.entity.Device>>
     * @Author: lizijie
     * @Date: 2020/12/03
     *
     * */
    public static Map<String, Double> getWind_direction_speed(List<Map<String, Object>> list){
        //定义u：水平方向，v：竖直方向
        double u = 0;
        double v = 0;
        for (Map map:list) {
            double u1 = 0;
            double v1 = 0;
            double wind_speed = Double.parseDouble(map.get("wind_speed").toString());
            double wind_direction = Double.parseDouble(map.get("wind_direction").toString());
            if (wind_speed == 0){
                continue;//如果风速为0，结束此次循环，进入下次循环
            }
            if (wind_direction==0){
                u1 = 0;
                v1 = wind_speed*1;
            }else if (0<wind_direction&&wind_direction<90){
                u1 = wind_speed*Math.sin(Math.toRadians(wind_direction));
                v1 = wind_speed*Math.cos(Math.toRadians(wind_direction));
            }else if (wind_direction == 90){
                u1 = wind_speed*1;
                v1 = 0;
            }else if (90<wind_direction&&wind_direction<180){
                u1 = wind_speed*Math.sin(Math.toRadians(180-wind_direction));
                v1 = -1*wind_speed*Math.cos(Math.toRadians(180-wind_direction));
            }else if (wind_direction == 180){
                u1 = 0;
                v1 = wind_speed*-1;
            }else if (180<wind_direction&&wind_direction<270){
                u1 = -1*wind_speed*Math.sin(Math.toRadians(wind_direction-180));
                v1 = -1*wind_speed*Math.cos(Math.toRadians(wind_direction-180));
            }else if (wind_direction == 270){
                u1 = wind_speed*-1;
                v1 = 0;
            }else if (270<wind_direction&&wind_direction<360){
                u1 = wind_speed*Math.sin(Math.toRadians(360-wind_direction));
                v1 = -1*wind_speed*Math.cos(Math.toRadians(360-wind_direction));
            }
            u = u+u1;
            v = v+v1;
        }
        Map<String,Double> windDirectionSpeedMap = new HashMap<>();
        if (u==0&&v==0){
            windDirectionSpeedMap.put("wind_direction",0.0);
            windDirectionSpeedMap.put("wind_speed",0.0);
        }else if (u==0&&v>0){
            windDirectionSpeedMap.put("wind_direction",0.0);
            windDirectionSpeedMap.put("wind_speed",v/list.size());
        }else if (u>0&&v>0){
            windDirectionSpeedMap.put("wind_direction",Math.toDegrees(Math.atan2(u,v)));
            windDirectionSpeedMap.put("wind_speed",Math.sqrt(u*u+v*v)/list.size());
        }else if (u>0&&v==0){
            windDirectionSpeedMap.put("wind_direction",90.0);
            windDirectionSpeedMap.put("wind_speed",u/list.size());
        }else if (u>0&&v<0){
            windDirectionSpeedMap.put("wind_direction",Math.toDegrees(Math.atan2(-v,u))+90);
            windDirectionSpeedMap.put("wind_speed",Math.sqrt(u*u+v*v)/list.size());
        }else if (u==0&&v<0){
            windDirectionSpeedMap.put("wind_direction",180.0);
            windDirectionSpeedMap.put("wind_speed",Math.abs(v)/list.size());
        }else if (u<0&&v<0){
            windDirectionSpeedMap.put("wind_direction",Math.toDegrees(Math.atan2(-u,-v))+180);
            windDirectionSpeedMap.put("wind_speed",Math.sqrt(u*u+v*v)/list.size());
        }else if (u<0&&v==0){
            windDirectionSpeedMap.put("wind_direction",270.0);
            windDirectionSpeedMap.put("wind_speed",Math.abs(u)/list.size());
        }else if (u<0&&v>0){
            windDirectionSpeedMap.put("wind_direction",Math.toDegrees(Math.atan2(v,-u))+270);
            windDirectionSpeedMap.put("wind_speed",Math.sqrt(u*u+v*v)/list.size());
        }
        return windDirectionSpeedMap;
    }
 
    /*public static void main(String[] args) {
        List list = new ArrayList();
        Map map = new HashMap();
        Map map2 = new HashMap();
        map.put("wind_direction",45);
        map.put("wind_speed",1);
        map2.put("wind_direction",45);
        map2.put("wind_speed",1);
        list.add(map);
        list.add(map2);
        Map<String, Double> re = getWind_direction_speed(list);
        System.out.println(re);
        System.out.println(Math.toRadians(45));
        System.out.println(Math.sin(Math.toRadians(45)));
        System.out.println(Math.cos(Math.toRadians(45)));
    }*/
 
}