vue根据百度api获取到自己所在位置的经纬度以及具体的位置名称
//获取地址和经纬度 getShopWxConfig() { let $this = this; wx.checkJsApi({ jsApiList: ["getLocation"], success: function(res) { if (res.checkResult.getLocation == false) { alert( "你的微信版本太低,不支持微信JS接口,请升级到最新的微信版本!" ); return; } } }); wx.getLocation({ type: "wgs84", success: function(res) { //转换为bd02 var convertor = new BMap.Convertor(); var pointArr = []; var ggPoint = new BMap.Point(res.longitude, res.latitude); pointArr.push(ggPoint); convertor.translate(pointArr, 1, 5, $this.translateCallback); }, cancel: function(res) { alert("用户拒绝授权获取地理位置"); } }); }, translateCallback(data){//坐标转换完之后的回调函数 let $this = this; if(data.status === 0) { $this.Burst.longitude = data.points[0].lng; $this.Burst.latitude = data.points[0].lat; let address = "" //通过baiduMap API获取街道名称 let point = new BMap.Point(data.points[0].lng, data.points[0].lat); let gc = new BMap.Geocoder(); gc.getLocation(point, function(rs) { let addComp = rs.addressComponents; address = addComp.city + addComp.district + addComp.street + addComp.streetNumber; $this.Burst.address = address; $this.scrollFn(); }); } },
后端百度api经纬度BD09=>WGS84=>GCJ-02之前的互相转换的utils类
public class CoordinateConvert {
private static double PI = Math.PI; private static double AXIS = 6378245.0; //
private static double OFFSET = 0.00669342162296594323; //(a^2 - b^2) / a^2
private static double X_PI = PI * 3000.0 / 180.0; //GCJ-02=>BD09 火星坐标系=>百度坐标系
public static double[] gcj2BD09(double glat, double glon) { double x = glon; double y = glat; double[] latlon = new double[2]; double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * X_PI); double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * X_PI);
latlon[0] = z * Math.sin(theta) + 0.006;
latlon[1] = z * Math.cos(theta) + 0.0065; return latlon;
} //BD09=>GCJ-02 百度坐标系=>火星坐标系
public static double[] bd092GCJ(double glat, double glon) { double x = glon - 0.0065; double y = glat - 0.006; double[] latlon = new double[2]; double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * X_PI); double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * X_PI);
latlon[0] = z * Math.sin(theta);
latlon[1] = z * Math.cos(theta); return latlon;
} //BD09=>WGS84 百度坐标系=>地球坐标系
public static double[] bd092WGS(double glat, double glon) { double[] latlon = bd092GCJ(glat, glon); return gcj2WGS(latlon[0], latlon[1]);
} // WGS84=》BD09 地球坐标系=>百度坐标系
public static double[] wgs2BD09(double wgLat, double wgLon) { double[] latlon = wgs2GCJ(wgLat, wgLon); return gcj2BD09(latlon[0], latlon[1]);
} // WGS84=》GCJ02 地球坐标系=>火星坐标系
public static double[] wgs2GCJ(double wgLat, double wgLon) { double[] latlon = new double[2]; if (outOfChina(wgLat, wgLon)) {
latlon[0] = wgLat;
latlon[1] = wgLon; return latlon;
} double[] deltaD = delta(wgLat, wgLon);
latlon[0] = wgLat + deltaD[0];
latlon[1] = wgLon + deltaD[1]; return latlon;
} //GCJ02=>WGS84 火星坐标系=>地球坐标系(粗略)
public static double[] gcj2WGS(double glat, double glon) { double[] latlon = new double[2]; if (outOfChina(glat, glon)) {
latlon[0] = glat;
latlon[1] = glon; return latlon;
} double[] deltaD = delta(glat, glon);
latlon[0] = glat - deltaD[0];
latlon[1] = glon - deltaD[1]; return latlon;
} //GCJ02=>WGS84 火星坐标系=>地球坐标系(精确)
public static double[] gcj2WGSExactly(double gcjLat, double gcjLon) { double initDelta = 0.01; double threshold = 0.000000001; double dLat = initDelta, dLon = initDelta; double mLat = gcjLat - dLat, mLon = gcjLon - dLon; double pLat = gcjLat + dLat, pLon = gcjLon + dLon; double wgsLat, wgsLon, i = 0; while (true) {
wgsLat = (mLat + pLat) / 2;
wgsLon = (mLon + pLon) / 2; double[] tmp = wgs2GCJ(wgsLat, wgsLon);
dLat = tmp[0] - gcjLat;
dLon = tmp[1] - gcjLon; if ((Math.abs(dLat) < threshold) && (Math.abs(dLon) < threshold)) break; if (dLat > 0) pLat = wgsLat; else mLat = wgsLat; if (dLon > 0) pLon = wgsLon; else mLon = wgsLon; if (++i > 10000) break;
} double[] latlon = new double[2];
latlon[0] = wgsLat;
latlon[1] = wgsLon; return latlon;
} //两点距离
public static double distance(double latA, double logA, double latB, double logB) { int earthR = 6371000; double x = Math.cos(latA * Math.PI / 180) * Math.cos(latB * Math.PI / 180) * Math.cos((logA - logB) * Math.PI / 180); double y = Math.sin(latA * Math.PI / 180) * Math.sin(latB * Math.PI / 180); double s = x + y; if (s > 1)
s = 1; if (s < -1)
s = -1; double alpha = Math.acos(s); double distance = alpha * earthR; return distance;
} public static double[] delta(double wgLat, double wgLon) { double[] latlng = new double[2]; double dLat = transformLat(wgLon - 105.0, wgLat - 35.0); double dLon = transformLon(wgLon - 105.0, wgLat - 35.0); double radLat = wgLat / 180.0 * PI; double magic = Math.sin(radLat);
magic = 1 - OFFSET * magic * magic; double sqrtMagic = Math.sqrt(magic);
dLat = (dLat * 180.0) / ((AXIS * (1 - OFFSET)) / (magic * sqrtMagic) * PI);
dLon = (dLon * 180.0) / (AXIS / sqrtMagic * Math.cos(radLat) * PI);
latlng[0] = dLat;
latlng[1] = dLon; return latlng;
} public static boolean outOfChina(double lat, double lon) { if (lon < 72.004 || lon > 137.8347) return true; if (lat < 0.8293 || lat > 55.8271) return true; return false;
} public static double transformLat(double x, double y) { double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));
ret += (20.0 * Math.sin(6.0 * x * PI) + 20.0 * Math.sin(2.0 * x * PI)) * 2.0 / 3.0;
ret += (20.0 * Math.sin(y * PI) + 40.0 * Math.sin(y / 3.0 * PI)) * 2.0 / 3.0;
ret += (160.0 * Math.sin(y / 12.0 * PI) + 320 * Math.sin(y * PI / 30.0)) * 2.0 / 3.0; return ret;
} public static double transformLon(double x, double y) { double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));
ret += (20.0 * Math.sin(6.0 * x * PI) + 20.0 * Math.sin(2.0 * x * PI)) * 2.0 / 3.0;
ret += (20.0 * Math.sin(x * PI) + 40.0 * Math.sin(x / 3.0 * PI)) * 2.0 / 3.0;
ret += (150.0 * Math.sin(x / 12.0 * PI) + 300.0 * Math.sin(x / 30.0 * PI)) * 2.0 / 3.0; return ret;
}
}
作者:菜菜___
链接:https://www.jianshu.com/p/7b3615666d04



