微信公众号获得城市及街道位置信息
微信公众号获得城市及街道位置信息
- 一 概念介绍
- 二 js和java坐标转换工具库
- 三 获得当前城市或经纬度对应的位置
- 四 总结
一、 概念介绍
目前国内主要有以下三种坐标系：
1. WGS84：为一种大地坐标系，也是目前广泛使用的GPS全球卫星定位系统使用的坐标系，即国际标准经纬度坐标；
2. GCJ02：表示经过国测局加密的坐标；
3. BD09：为百度坐标系，其中bd09ll表示百度经纬度坐标，bd09mc表示百度墨卡托米制坐标(Web服务坐标)；
二、 js和java坐标转换工具库
上面3种坐标可想到转换，而且百度地图毕境在国内是个大的地图内容提供商，所以获得其它坐标基本上都会把它转换成BD09百度坐标系。
js坐标转换库
var GPS = {
PI : 3.14159265358979324,
x_pi : 3.14159265358979324 * 3000.0 / 180.0,
delta : function (lat, lon) {
// Krasovsky 1940
//
// a = 6378245.0, 1/f = 298.3
// b = a * (1 - f)
// ee = (a^2 - b^2) / a^2;
var a = 6378245.0; // a: 卫星椭球坐标投影到平面地图坐标系的投影因子。
var ee = 0.00669342162296594323; // ee: 椭球的偏心率。
var dLat = this.transformLat(lon - 105.0, lat - 35.0);
var dLon = this.transformLon(lon - 105.0, lat - 35.0);
var radLat = lat / 180.0 * this.PI;
var magic = Math.sin(radLat);
magic = 1 - ee * magic * magic;
var sqrtMagic = Math.sqrt(magic);
dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * this.PI);
dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * this.PI);
return {'lat': dLat, 'lon': dLon};
},
//WGS-84坐标系 转 GCJ-02坐标系
gcj_encrypt : function (wgsLat, wgsLon) {
if (this.outOfChina(wgsLat, wgsLon))
return {'lat': wgsLat, 'lon': wgsLon};
var d = this.delta(wgsLat, wgsLon);
return {'lat' : wgsLat + d.lat,'lon' : wgsLon + d.lon};
},
//GCJ-02坐标系 转 WGS-84坐标系
gcj_decrypt : function (gcjLat, gcjLon) {
if (this.outOfChina(gcjLat, gcjLon))
return {'lat': gcjLat, 'lon': gcjLon};
var d = this.delta(gcjLat, gcjLon);
return {'lat': gcjLat - d.lat, 'lon': gcjLon - d.lon};
},
//更精确的计算GCJ-02坐标系 转 WGS-84坐标系
gcj_decrypt_exact : function (gcjLat, gcjLon) {
var initDelta = 0.01;
var threshold = 0.000000001;
var dLat = initDelta, dLon = initDelta;
var mLat = gcjLat - dLat, mLon = gcjLon - dLon;
var pLat = gcjLat + dLat, pLon = gcjLon + dLon;
var wgsLat, wgsLon, i = 0;
while (1) {
wgsLat = (mLat + pLat) / 2;
wgsLon = (mLon + pLon) / 2;
var tmp = this.gcj_encrypt(wgsLat, wgsLon)
dLat = tmp.lat - gcjLat;
dLon = tmp.lon - 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;
}
//console.log(i);
return {'lat': wgsLat, 'lon': wgsLon};
},
//GCJ-02坐标系 转 BD-09坐标系
bd_encrypt : function (gcjLat, gcjLon) {
var x = gcjLon, y = gcjLat;
var z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * this.x_pi);
var theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * this.x_pi);
bdLon = z * Math.cos(theta) + 0.0065;
bdLat = z * Math.sin(theta) + 0.006;
return {'lat' : bdLat,'lon' : bdLon};
},
//BD-09坐标系 转 GCJ-02坐标系
bd_decrypt : function (bdLat, bdLon) {
var x = bdLon - 0.0065, y = bdLat - 0.006;
var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * this.x_pi);
var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * this.x_pi);
var gcjLon = z * Math.cos(theta);
var gcjLat = z * Math.sin(theta);
return {'lat' : gcjLat, 'lon' : gcjLon};
},
//WGS-84坐标系 转 bd09mc百度墨卡托米制坐标
//mercatorLat -> y mercatorLon -> x
mercator_encrypt : function(wgsLat, wgsLon) {
var x = wgsLon * 20037508.34 / 180.;
var y = Math.log(Math.tan((90. + wgsLat) * this.PI / 360.)) / (this.PI / 180.);
y = y * 20037508.34 / 180.;
return {'lat' : y, 'lon' : x};
/*
if ((Math.abs(wgsLon) > 180 || Math.abs(wgsLat) > 90))
return null;
var x = 6378137.0 * wgsLon * 0.017453292519943295;
var a = wgsLat * 0.017453292519943295;
var y = 3189068.5 * Math.log((1.0 + Math.sin(a)) / (1.0 - Math.sin(a)));
return {'lat' : y, 'lon' : x};
//*/
},
// Web mercator to WGS-84
//bd09mc百度墨卡托米制坐标 转 WGS-84坐标系
// mercatorLat -> y mercatorLon -> x
mercator_decrypt : function(mercatorLat, mercatorLon) {
var x = mercatorLon / 20037508.34 * 180.;
var y = mercatorLat / 20037508.34 * 180.;
y = 180 / this.PI * (2 * Math.atan(Math.exp(y * this.PI / 180.)) - this.PI / 2);
return {'lat' : y, 'lon' : x};
/*
if (Math.abs(mercatorLon) < 180 && Math.abs(mercatorLat) < 90)
return null;
if ((Math.abs(mercatorLon) > 20037508.3427892) || (Math.abs(mercatorLat) > 20037508.3427892))
return null;
var a = mercatorLon / 6378137.0 * 57.295779513082323;
var x = a - (Math.floor(((a + 180.0) / 360.0)) * 360.0);
var y = (1.5707963267948966 - (2.0 * Math.atan(Math.exp((-1.0 * mercatorLat) / 6378137.0)))) * 57.295779513082323;
return {'lat' : y, 'lon' : x};
//*/
},
// 计算2个经纬间距离
distance : function (latA, lonA, latB, lonB) {
var earthR = 6371000.;
var x = Math.cos(latA * this.PI / 180.) * Math.cos(latB * this.PI / 180.) * Math.cos((lonA - lonB) * this.PI / 180);
var y = Math.sin(latA * this.PI / 180.) * Math.sin(latB * this.PI / 180.);
var s = x + y;
if (s > 1) s = 1;
if (s < -1) s = -1;
var alpha = Math.acos(s);
var distance = alpha * earthR;
return distance;
},
//确定坐标是国外还是国内
outOfChina : function (lat, lon) {
if (lon < 72.004 || lon > 137.8347)
return true;
if (lat < 0.8293 || lat > 55.8271)
return true;
return false;
},
transformLat : function (x, y) {
var 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 * this.PI) + 20.0 * Math.sin(2.0 * x * this.PI)) * 2.0 / 3.0;
ret += (20.0 * Math.sin(y * this.PI) + 40.0 * Math.sin(y / 3.0 * this.PI)) * 2.0 / 3.0;
ret += (160.0 * Math.sin(y / 12.0 * this.PI) + 320 * Math.sin(y * this.PI / 30.0)) * 2.0 / 3.0;
return ret;
},
transformLon : function (x, y) {
var 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 * this.PI) + 20.0 * Math.sin(2.0 * x * this.PI)) * 2.0 / 3.0;
ret += (20.0 * Math.sin(x * this.PI) + 40.0 * Math.sin(x / 3.0 * this.PI)) * 2.0 / 3.0;
ret += (150.0 * Math.sin(x / 12.0 * this.PI) + 300.0 * Math.sin(x / 30.0 * this.PI)) * 2.0 / 3.0;
return ret;
}
};java坐标转换库
PositionUtil.java:
package yui.comn.util;
import yui.comn.model.Gps;
/**
* 各地图API坐标系统比较与转换;
* WGS84坐标系：即地球坐标系，国际上通用的坐标系。设备一般包含GPS芯片或者北斗芯片获取的经纬度为WGS84地理坐标系,
* 谷歌地图采用的是WGS84地理坐标系（中国范围除外）;
* GCJ02坐标系：即火星坐标系，是由中国国家测绘局制订的地理信息系统的坐标系统。由WGS84坐标系经加密后的坐标系。
* 谷歌中国地图和搜搜中国地图采用的是GCJ02地理坐标系; BD09坐标系：即百度坐标系，GCJ02坐标系经加密后的坐标系;
* 搜狗坐标系、图吧坐标系等，估计也是在GCJ02基础上加密而成的。
* @author Henry
*
*/
public class PositionUtil {
public static final String BAIDU_LBS_TYPE = "bd09ll";
public static double pi = 3.1415926535897932384626;
public static double a = 6378245.0;
public static double ee = 0.00669342162296594323;
/**
* 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System
*
* @param lat
* @param lon
* @return
*/
public static Gps gps84_To_Gcj02(double lat, double lon) {
if (outOfChina(lat, lon)) {
return null;
}
double dLat = transformLat(lon - 105.0, lat - 35.0);
double dLon = transformLon(lon - 105.0, lat - 35.0);
double radLat = lat / 180.0 * pi;
double magic = Math.sin(radLat);
magic = 1 - ee * magic * magic;
double sqrtMagic = Math.sqrt(magic);
dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
double mgLat = lat + dLat;
double mgLon = lon + dLon;
return new Gps(mgLat, mgLon);
}
/**
* * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return
* */
public static Gps gcj_To_Gps84(double lat, double lon) {
Gps gps = transform(lat, lon);
double lontitude = lon * 2 - gps.getWgLon();
double latitude = lat * 2 - gps.getWgLat();
return new Gps(latitude, lontitude);
}
/**
* 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 将 GCJ-02 坐标转换成 BD-09 坐标
*
* @param gg_lat
* @param gg_lon
*/
public static Gps gcj02_To_Bd09(double gg_lat, double gg_lon) {
double x = gg_lon, y = gg_lat;
double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * pi);
double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * pi);
double bd_lon = z * Math.cos(theta) + 0.0065;
double bd_lat = z * Math.sin(theta) + 0.006;
return new Gps(bd_lat, bd_lon);
}
/**
* * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 * * 将 BD-09 坐标转换成GCJ-02 坐标 * * @param
* bd_lat * @param bd_lon * @return
*/
public static Gps bd09_To_Gcj02(double bd_lat, double bd_lon) {
double x = bd_lon - 0.0065, y = bd_lat - 0.006;
double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * pi);
double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * pi);
double gg_lon = z * Math.cos(theta);
double gg_lat = z * Math.sin(theta);
return new Gps(gg_lat, gg_lon);
}
/**
* (BD-09)-->84
* @param bd_lat
* @param bd_lon
* @return
*/
public static Gps bd09_To_Gps84(double bd_lat, double bd_lon) {
Gps gcj02 = PositionUtil.bd09_To_Gcj02(bd_lat, bd_lon);
Gps map84 = PositionUtil.gcj_To_Gps84(gcj02.getWgLat(),
gcj02.getWgLon());
return map84;
}
/**
* 将84 坐标转换成 BD-09 坐标
* @param bd_lat
* @param bd_lon
* @return
*/
public static Gps gps84_To_Bd09(double lat, double lon) {
Gps gps = gps84_To_Gcj02(lat,lon);
return gcj02_To_Bd09(gps.getWgLat(),gps.getWgLon());
}
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 Gps transform(double lat, double lon) {
if (outOfChina(lat, lon)) {
return new Gps(lat, lon);
}
double dLat = transformLat(lon - 105.0, lat - 35.0);
double dLon = transformLon(lon - 105.0, lat - 35.0);
double radLat = lat / 180.0 * pi;
double magic = Math.sin(radLat);
magic = 1 - ee * magic * magic;
double sqrtMagic = Math.sqrt(magic);
dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
double mgLat = lat + dLat;
double mgLon = lon + dLon;
return new Gps(mgLat, mgLon);
}
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;
}
public static void main(String[] args) {
// 北斗芯片获取的经纬度为WGS84地理坐标 31.426896,119.496145
Gps gps = new Gps(31.426896, 119.496145);
System.out.println("gps :" + gps);
Gps gcj = gps84_To_Gcj02(gps.getWgLat(), gps.getWgLon());
System.out.println("gcj :" + gcj);
Gps star = gcj_To_Gps84(gcj.getWgLat(), gcj.getWgLon());
System.out.println("star:" + star);
Gps bd = gcj02_To_Bd09(gcj.getWgLat(), gcj.getWgLon());
System.out.println("bd :" + bd);
Gps gcj2 = bd09_To_Gcj02(bd.getWgLat(), bd.getWgLon());
System.out.println("gcj :" + gcj2);
}
}Gps.java
package yui.comn.model;
public class Gps {
private double wgLat;
private double wgLon;
public Gps(double wgLat, double wgLon) {
setWgLat(wgLat);
setWgLon(wgLon);
}
public double getWgLat() {
return wgLat;
}
public void setWgLat(double wgLat) {
this.wgLat = wgLat;
}
public double getWgLon() {
return wgLon;
}
public void setWgLon(double wgLon) {
this.wgLon = wgLon;
}
@Override
public String toString() {
return wgLat + "," + wgLon;
}
}三、 获得当前城市或经纬度对应的位置
参照《微信接入js-sdk-获取地理位置，打开微信内置地图》设置微信公众号获得地理位置服务及配置。这里使用百度js_api将获得经纬度转成百度坐标，再用百度api查询到位置信息。
我自己总结的微信位置方法库WeiXinConfig.js：
document.write("");
function WeiXinConfig(){}
//有引入Common.js
//1.basePath路径
//2./weixin/getJsTicket后台有服务
//微信关闭渡口
WeiXinConfig.closeBridge = function() {
WeixinJSBridge.call('closeWindow');
}
//分享给朋友
WeiXinConfig.onMenuShareAppMessage=function(title,desc,link,imgUrl,successCB,cancelCB){
wx.onMenuShareAppMessage({
title: title, // 分享标题
desc: desc, // 分享描述
link: link, // 分享链接，该链接域名或路径必须与当前页面对应的公众号JS安全域名一致
imgUrl:imgUrl,
success: function(){
if(successCB){
successCB.call(this);
}
},
cancel: function(){
if(cancelCB){
cancelCB.call(this);
}
}
});
}
//分享给朋友圈
WeiXinConfig.onMenuShareTimeline=function(title,desc,link,imgUrl,successCB,cancelCB){
wx.onMenuShareTimeline({
title: title, // 分享标题
desc: desc, // 分享描述
link: link, // 分享链接，该链接域名或路径必须与当前页面对应的公众号JS安全域名一致
imgUrl:imgUrl,
success: function(){
if(successCB){
successCB.call(this);
}
},
cancel: function(){
if(cancelCB){
cancelCB.call(this);
}
}
});
}
//配置
WeiXinConfig.config = function() {
var thisPageUrl = location.href.split('#')[0];
var json = {
url : thisPageUrl
};
// Common.getRemote({url:basePath + "/weixin/getJsTicket",data:json,success:function(data){
// if (data != null) {
// configWeiXin(data.appId, data.timestamp, data.nonceStr,
// data.signature);
// } else {
// console.log("配置weixin jsapi失败");
// }
// },error:function(data){
// console.log("配置请求错误");
// }})
$.get({url:basePath + "/weixin/getJsTicket",data:json,success:function(data){
if (data != null) {
configWeiXin(data.appId, data.timestamp, data.nonceStr,
data.signature);
} else {
console.log("配置weixin jsapi失败");
}
},error:function(data){
console.log("配置请求错误");
}})
}
function configWeiXin(appId, timestamp, nonceStr, signature) {
wx.config({
debug : false,// 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
appId : appId,
timestamp : timestamp,
nonceStr : nonceStr,
signature : signature,
jsApiList : [ 'chooseImage', 'uploadImage', 'downloadImage',
'previewImage', 'openLocation', 'getLocation',
'scanQRCode', 'checkJsApi', 'onMenuShareTimeline',
'onMenuShareAppMessage', 'onMenuShareQQ',
'onMenuShareWeibo', 'onMenuShareQZone' ]
});
}
var successCBack;
var errorCBack;
/**支付*/
WeiXinConfig.prePayFor=function(jsonData, success, error){
successCBack = success;
errorCBack = error;
doPrePayFor(jsonData);
}
//立即支付
function doPrePayFor(jsonData) {
$.ajax({
type: "GET",
url: basePath + "/bss/pay/ordPrePay",
xhrFields: {
withCredentials: true
},
data: jsonData,
contentType: "application/x-www-form-urlencoded",
dataType: "json",
async: true,
success: function (data) {
doBridgeReady(data);
},
error: function (res) {
console.log("ajax请求失败11,res:" + JSON.stringify(res));
}
});
}
function doBridgeReady(data){
if (typeof WeixinJSBridge == "undefined"){
if( document.addEventListener ){
document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
}else if (document.attachEvent){
document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
}
}else{
onBridgeReady(data);
}
}
function onBridgeReady(data) {
WeixinJSBridge.invoke('getBrandWCPayRequest', {
"appId" : data.appId, /* 微信支付，坑一 冒号是中文字符 */
// "appId" : data.appId, // 公众号名称，由商户传入
"timeStamp" : data.timeStamp, // 时间戳，自1970年以来的秒数
"nonceStr" : data.nonceStr, // 随机串
"package" : data.package,
"signType" : data.signType, // 微信签名方式：
"paySign" : data.paySign
// 微信签名
}, function(res) {
console.log(res);
if (res.err_msg == "get_brand_wcpay_request:ok") {
if(successCBack){
successCBack.call(this);
}
} else {
layerTip("支付失败");
if(errorCBack){
errorCBack.call(this);
}
}
});
}
WeiXinConfig.codeScan=function(success){
wx.scanQRCode({
needResult: 1, // 默认为0，扫描结果由微信处理，1则直接返回扫描结果，
scanType: ["qrCode","barCode"], // 可以指定扫二维码还是一维码，默认二者都有
success: function (res) {
var result = res.resultStr; // 当needResult 为 1 时，扫码返回的结果
if(success){
success.call(this, result);
}
}
});
}
function alertMessage(text) {
layer.open({
content : text,
skin : 'msg',
time : 4
});
}
function layerTip(msg, success){
layer.open({
type: 1,
className: '',
content: '',
style: 'border-radius:8px',
success:function(){
$('.j-close,.j-true').click(function(){
layer.closeAll();
if(success){
success.call(this);
}
});
}
});
};
其中basePath是