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java工具类(六)根据经纬度计算距离_java hutool工具通过经纬度计算距离

java hutool工具通过经纬度计算距离

Java实现根据经纬度计算距离

在项目开发过程中,需要根据两地经纬度坐标计算两地间距离,所用的工具类如下:

Demo1:

 

  1. public static double getDistatce(double lat1, double lat2, double lon1, double lon2) {
  2. double R = 6371;
  3. double distance = 0.0;
  4. double dLat = (lat2 - lat1) * Math.PI / 180;
  5. double dLon = (lon2 - lon1) * Math.PI / 180;
  6. double a = Math.sin(dLat / 2) * Math.sin(dLat / 2)
  7. + Math.cos(lat1 * Math.PI / 180)
  8. * Math.cos(lat2 * Math.PI / 180) * Math.sin(dLon / 2)
  9. * Math.sin(dLon / 2);
  10. distance = (2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a))) * R;
  11. return distance;
  12. }

 

Demo2:

 

  1. private static final double EARTH_RADIUS = 6378.137 * 1000;
  2. private static double rad(double d)
  3. {
  4. return d * Math.PI / 180.0;
  5. }
  6. public static double GetDistance(double lat1, double lng1, double lat2, double lng2)
  7. {
  8. double radLat1 = rad(lat1);
  9. double radLat2 = rad(lat2);
  10. double a = radLat1 - radLat2;
  11. double b = rad(lng1) - rad(lng2);
  12. double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a/2),2) +
  13. Math.cos(radLat1)*Math.cos(radLat2)*Math.pow(Math.sin(b/2),2)));
  14. s = s * EARTH_RADIUS ;
  15. s = Math.round(s * 10000) / 10000;
  16. return s;
  17. }

 

Demo3:

 

  1. private static final double EARTH_RADIUS = 6378137;//赤道半径(单位m)
  2. /**
  3. * 转化为弧度(rad)
  4. * */
  5. private static double rad(double d)
  6. {
  7. return d * Math.PI / 180.0;
  8. }
  9. /**
  10. * 基于余弦定理求两经纬度距离
  11. * @param lon1 第一点的精度
  12. * @param lat1 第一点的纬度
  13. * @param lon2 第二点的精度
  14. * @param lat3 第二点的纬度
  15. * @return 返回的距离,单位km
  16. * */
  17. public static double LantitudeLongitudeDist(double lon1, double lat1,double lon2, double lat2) {
  18. double radLat1 = rad(lat1);
  19. double radLat2 = rad(lat2);
  20. double radLon1 = rad(lon1);
  21. double radLon2 = rad(lon2);
  22. if (radLat1 < 0)
  23. radLat1 = Math.PI / 2 + Math.abs(radLat1);// south
  24. if (radLat1 > 0)
  25. radLat1 = Math.PI / 2 - Math.abs(radLat1);// north
  26. if (radLon1 < 0)
  27. radLon1 = Math.PI * 2 - Math.abs(radLon1);// west
  28. if (radLat2 < 0)
  29. radLat2 = Math.PI / 2 + Math.abs(radLat2);// south
  30. if (radLat2 > 0)
  31. radLat2 = Math.PI / 2 - Math.abs(radLat2);// north
  32. if (radLon2 < 0)
  33. radLon2 = Math.PI * 2 - Math.abs(radLon2);// west
  34. double x1 = EARTH_RADIUS * Math.cos(radLon1) * Math.sin(radLat1);
  35. double y1 = EARTH_RADIUS * Math.sin(radLon1) * Math.sin(radLat1);
  36. double z1 = EARTH_RADIUS * Math.cos(radLat1);
  37. double x2 = EARTH_RADIUS * Math.cos(radLon2) * Math.sin(radLat2);
  38. double y2 = EARTH_RADIUS * Math.sin(radLon2) * Math.sin(radLat2);
  39. double z2 = EARTH_RADIUS * Math.cos(radLat2);
  40. double d = Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2)+ (z1 - z2) * (z1 - z2));
  41. //余弦定理求夹角
  42. double theta = Math.acos((EARTH_RADIUS * EARTH_RADIUS + EARTH_RADIUS * EARTH_RADIUS - d * d) / (2 * EARTH_RADIUS * EARTH_RADIUS));
  43. double dist = theta * EARTH_RADIUS;
  44. return dist;
  45. }

 

Demo4:

 

  1. //google map
  2. private static final double EARTH_RADIUS = 6378137;//赤道半径(单位m)
  3. /**
  4. * 转化为弧度(rad)
  5. * */
  6. private static double rad(double d)
  7. {
  8. return d * Math.PI / 180.0;
  9. }
  10. /**
  11. * 基于googleMap中的算法得到两经纬度之间的距离,计算精度与谷歌地图的距离精度差不多,相差范围在0.2米以下
  12. * @param lon1 第一点的精度
  13. * @param lat1 第一点的纬度
  14. * @param lon2 第二点的精度
  15. * @param lat3 第二点的纬度
  16. * @return 返回的距离,单位km
  17. * */
  18. public static double GetDistance(double lon1,double lat1,double lon2, double lat2)
  19. {
  20. double radLat1 = rad(lat1);
  21. double radLat2 = rad(lat2);
  22. double a = radLat1 - radLat2;
  23. double b = rad(lon1) - rad(lon2);
  24. double s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a/2),2)+Math.cos(radLat1)*Math.cos(radLat2)*Math.pow(Math.sin(b/2),2)));
  25. s = s * EARTH_RADIUS;
  26. s = Math.round(s * 10000) / 10000;
  27. return s;
  28. }

 

 

 

 

 

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