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+package com.jpsoft.gps.utils;
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+
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+import com.alibaba.fastjson.JSONArray;
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+import com.alibaba.fastjson.JSONObject;
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+
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+import java.io.BufferedReader;
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+import java.io.InputStreamReader;
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+import java.net.URL;
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+import java.net.URLConnection;
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+import java.text.DecimalFormat;
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+
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+public class GPSUtil {
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+ public static double pi = 3.1415926535897932384626;
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+ public static double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
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+ public static double a = 6378245.0;
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+ public static double ee = 0.00669342162296594323;
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+
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+ public static double transformLat(double x, double y) {
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+ double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y
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+ + 0.2 * Math.sqrt(Math.abs(x));
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+ ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
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+ ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
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+ ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
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+ return ret;
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+ }
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+
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+ public static double transformLon(double x, double y) {
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+ double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1
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+ * Math.sqrt(Math.abs(x));
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+ ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
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+ ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
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+ ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0
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+ * pi)) * 2.0 / 3.0;
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+ return ret;
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+ }
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+ public static double[] transform(double lat, double lon) {
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+ if (outOfChina(lat, lon)) {
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+ return new double[]{lat,lon};
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+ }
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+ double dLat = transformLat(lon - 105.0, lat - 35.0);
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+ double dLon = transformLon(lon - 105.0, lat - 35.0);
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+ double radLat = lat / 180.0 * pi;
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+ double magic = Math.sin(radLat);
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+ magic = 1 - ee * magic * magic;
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+ double sqrtMagic = Math.sqrt(magic);
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+ dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
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+ dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
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+ double mgLat = lat + dLat;
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+ double mgLon = lon + dLon;
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+ return new double[]{mgLat,mgLon};
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+ }
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+ public static boolean outOfChina(double lat, double lon) {
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+ if (lon < 72.004 || lon > 137.8347) {
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+ return true;
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+ }
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+
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+ if (lat < 0.8293 || lat > 55.8271) {
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+ return true;
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+ }
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+
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+ return false;
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+ }
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+ /**
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+ * 84 to 火星坐标系 (GCJ-02) World Geodetic System ==> Mars Geodetic System
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+ *
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+ * @param lat
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+ * @param lon
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+ * @return
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+ */
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+ public static double[] gps84_To_Gcj02(double lat, double lon) {
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+ if (outOfChina(lat, lon)) {
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+ return new double[]{lat,lon};
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+ }
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+ double dLat = transformLat(lon - 105.0, lat - 35.0);
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+ double dLon = transformLon(lon - 105.0, lat - 35.0);
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+ double radLat = lat / 180.0 * pi;
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+ double magic = Math.sin(radLat);
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+ magic = 1 - ee * magic * magic;
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+ double sqrtMagic = Math.sqrt(magic);
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+ dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
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+ dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
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+ double mgLat = lat + dLat;
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+ double mgLon = lon + dLon;
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+ return new double[]{mgLat, mgLon};
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+ }
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+
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+ /**
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+ * * 火星坐标系 (GCJ-02) to 84 * * @param lon * @param lat * @return
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+ * */
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+ public static double[] gcj02_To_Gps84(double lat, double lon) {
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+ double[] gps = transform(lat, lon);
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+ double lontitude = lon * 2 - gps[1];
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+ double latitude = lat * 2 - gps[0];
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+ return new double[]{latitude, lontitude};
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+ }
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+ /**
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+ * 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
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+ *
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+ * @param lat
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+ * @param lon
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+ */
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+ public static double[] gcj02_To_Bd09(double lat, double lon) {
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+ double x = lon, y = lat;
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+ double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
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+ double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
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+ double tempLon = z * Math.cos(theta) + 0.0065;
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+ double tempLat = z * Math.sin(theta) + 0.006;
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+ double[] gps = {tempLat,tempLon};
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+ return gps;
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+ }
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+
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+ /**
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+ * * 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
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+ * bd_lat * @param bd_lon * @return
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+ */
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+ public static double[] bd09_To_Gcj02(double lat, double lon) {
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+ double x = lon - 0.0065, y = lat - 0.006;
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+ double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
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+ double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
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+ double tempLon = z * Math.cos(theta);
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+ double tempLat = z * Math.sin(theta);
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+ double[] gps = {tempLat,tempLon};
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+ return gps;
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+ }
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+
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+ /**将gps84转为bd09
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+ * @param lat
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+ * @param lon
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+ * @return
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+ */
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+ public static double[] gps84_To_bd09(double lat,double lon){
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+ double[] gcj02 = gps84_To_Gcj02(lat,lon);
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+ double[] bd09 = gcj02_To_Bd09(gcj02[0],gcj02[1]);
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+ return bd09;
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+ }
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+ public static double[] bd09_To_gps84(double lat,double lon){
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+ double[] gcj02 = bd09_To_Gcj02(lat, lon);
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+ double[] gps84 = gcj02_To_Gps84(gcj02[0], gcj02[1]);
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+ //保留小数点后六位
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+ gps84[0] = retain6(gps84[0]);
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+ gps84[1] = retain6(gps84[1]);
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+ return gps84;
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+ }
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+
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+ /**保留小数点后六位
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+ * @param num
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+ * @return
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+ */
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+ private static double retain6(double num){
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+ String result = String .format("%.6f", num);
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+ return Double.valueOf(result);
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+ }
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+
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+ public static String regeo(String longitude,String latitude,String key) {
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+ StringBuffer json = new StringBuffer();
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+
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+ //09abadb2e35fc61fd84042c518e9aebf
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+ try {
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+ URL u = new URL(String.format("https://restapi.amap.com/v3/geocode/regeo?location=%s,%s&key=%s",
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+ longitude,latitude,key));
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+
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+ URLConnection yc = u.openConnection();
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+ //读取返回的数据
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+ BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream(),"UTF-8"));
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+ String inputline = null;
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+
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+ while((inputline=in.readLine())!=null){
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+ json.append(inputline);
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+ }
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+
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+ in.close();
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ }
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+
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+ String jsonStr = json.toString();
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+
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+ System.out.println(jsonStr);
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+
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+ JSONObject jsonObject = JSONObject.parseObject(jsonStr);
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+
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+ JSONObject regeocode = jsonObject.getJSONObject("regeocode");
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+
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+ //判断输入的位置点是否存在
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+ if(regeocode!=null) {
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+ return regeocode.getString("formatted_address");
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+ }
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+ else {
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+ return null;
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+ }
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+ }
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+
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+ public static void main(String[] args) {
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+ double[] points = GPSUtil.bd09_To_Gcj02(30.308866F,112.270896F);
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+
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+ DecimalFormat df = new DecimalFormat("#.######");
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+
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+ String longitude = df.format(points[1]);
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+ String latitude = df.format(points[0]);
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+
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+ System.out.println(longitude + "," + latitude);
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+
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+ String address = GPSUtil.regeo(longitude,latitude,"a71a4fa458ed085246ea75ebe096bbea");
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+
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+ System.out.println(address);
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+ }
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+}
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