/**
* 查询收货地址列表
*
* @param request
* @param wechatId
* @return
*/
@RequestMapping("/weixin/address/queryRecentlyAddress"
)
public AddressVo queryRecentlyAddress(HttpServletRequest request, Integer wechatId, AddressVo vo) {
String openId =
OauthUtil.getInstance().getOpenId(request, String.valueOf(wechatId));
// 查询收货地址
Map<String, Object> map =
new HashMap<String, Object>
();
String nowLng = (String) request.getAttribute("Lng"
);
String nowLat = (String) request.getAttribute("Lat"
);
map.put("openId"
, openId);
List<AddressVo> aList =
addressService.queryList(map);//TreeMap具有更具key做自动排序的功能，默认为正序即从小到大
Map<Double,AddressVo> addressMap=
new TreeMap<Double,AddressVo>
();
for(AddressVo address:aList){
String latitude =
address.getLatitude();
String longitude =
address.getLongitude();
double distance =
Distance(nowLng,nowLat,latitude,longitude);
addressMap.put(distance,address);
}
AddressVo addressVo = addressMap.get(0
);
return addressVo;
}
根据两个点的经纬度算出两个点之间的距离
//根据两个地点的经纬度，计算两的距离
private static final double EARTH_RADIUS = 6378.137;
private static double rad(double d){ return d * Math.PI / 180.0; }
public double Distance(String nowLng, String nowLat, String latitude, String longitude) {
double long1;
double lat1;
double long2;
double lat2;
double a, b, sa2, sb2,d = 0
;
try {
long1 =
Double.valueOf(nowLng);
lat1 =
Double.valueOf(nowLat);
long2 =
Double.valueOf(latitude);
lat2 =
Double.valueOf(longitude);
lat1 =
rad(lat1);
lat2 =
rad(lat2);
a = lat1 -
lat2;
b = rad(long1 -
long2);
sa2 = Math.sin(a / 2.0
);
sb2 = Math.sin(b / 2.0
);
d = 2 *
EARTH_RADIUS
* Math.asin(Math.sqrt(sa2 * sa2 +
Math.cos(lat1)
* Math.cos(lat2) * sb2 *
sb2));
} catch (Exception e) {
e.printStackTrace();
}
return d;
}
转载于:https://www.cnblogs.com/flytogalaxy/p/6992244.html
