1、根据经纬度计算距离
private static double EARTH_RADIUS = 6378.137;
private double rad(double d) {
return d * Math.PI / 180.0;
}
/**
* @param targetLongitude 目标经度
* @param targetLatitude
* @param currentLongitude 当前经度
* @param currentLatitude
* @return
*/
private double range(double targetLongitude, double targetLatitude, double currentLongitude, double currentLatitude) {
double radLat1 = rad(targetLatitude);
double radLat2 = rad(currentLatitude);
double a = radLat1 - radLat2;
double b = rad(targetLongitude) - rad(currentLongitude);
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)));
s = s * EARTH_RADIUS;
s = Math.round(s * 10000d) / 10000d;
s = s * 1000;
return s;
}
/**
* 逆地址
*
* @param currentLongitude--当前经度
* @param currentLatitude--当前纬度
* @return
*/
private String TxServiceGcoder(double currentLongitude, double currentLatitude) {
String address = "";
String url = "https://apis.map.qq.com/ws/geocoder/v1/";
String key = "";
String param = "location=" + currentLatitude + "," + currentLongitude + "&key=" + key;
String result = HttpRequest.sendGet(url, param);
JSONObject json = JSON.parseObject(result);
int status = (int) json.get("status");
if (status == 0) {
address = json.getJSONObject("result").get("address").toString();
} else {
throw new RuntimeException(result);
}
return address;
}