package com.skjd.util;import java.util.ArrayList;import java.util.List;/** * 坐标以及电子围栏相关的工具类 * @author zhangyao * */public class PointUtil { public static void main(String[] args) { String str="114.316587,30.671626#114.325921,30.683437#114.342122,30.689342#114.359009,30.695246#114.377066,30.692884#114.393304,30.678417#114.412289,30.650953#114.426107,30.625253#114.433703,30.595853#114.444368,30.560458#114.466705,30.527415#114.457264,30.517327#114.454002,30.503097#114.458465,30.474631#114.430828,30.466313#114.397697,30.460362#114.343281,30.456778#114.305086,30.457354#114.269101,30.468743#114.23449,30.489598#114.182713,30.522872#114.17296,30.535364#114.167328,30.55022#114.165783,30.575754#114.167155,30.591715#114.161492,30.606935#114.160461,30.619049#114.170589,30.627469#114.206123,30.623481#114.233932,30.629832#114.184837,30.704361#114.187927,30.776472#114.233589,30.780122#114.238567,30.717035#114.248609,30.66835#114.284744,30.659813#"; } /** * 传入字符串类型的坐标组;经纬度“,”分隔;坐标之间“#”分隔;以“#”好结束 * @return */ public static boolean is(String str,double x,double y){ Listlist = getxyUtil(str); Point[] ps2 = new Point[list.size()]; for(int i=0;i<list.size();i++){ ps2[i]=list.get(i); } Point n1 = new Point(x,y); if(isPtInPoly(n1.getX() , n1.getY() , ps2)){ return true; } return false; } /** * 传入经度,维度;和需要判断的多边形坐标组 * @param ALon * @param ALat * @param ps * @return */ public static boolean isPtInPoly (double ALon , double ALat , Point[] ps) { int iSum, iCount, iIndex; double dLon1 = 0, dLon2 = 0, dLat1 = 0, dLat2 = 0, dLon; if (ps.length < 3) { return false; } iSum = 0; iCount = ps.length; for (iIndex = 0; iIndex<iCount;iIndex++) { if (iIndex == iCount - 1) { dLon1 = ps[iIndex].getX(); dLat1 = ps[iIndex].getY(); dLon2 = ps[0].getX(); dLat2 = ps[0].getY(); } else { dLon1 = ps[iIndex].getX(); dLat1 = ps[iIndex].getY(); dLon2 = ps[iIndex + 1].getX(); dLat2 = ps[iIndex + 1].getY(); } // 以下语句判断A点是否在边的两端点的水平平行线之间,在则可能有交点,开始判断交点是否在左射线上 if (((ALat >= dLat1) && (ALat < dLat2)) || ((ALat >= dLat2) && (ALat < dLat1))) { if (Math.abs(dLat1 - dLat2) > 0) { //得到 A点向左射线与边的交点的x坐标: dLon = dLon1 - ((dLon1 - dLon2) * (dLat1 - ALat) ) / (dLat1 - dLat2); // 如果交点在A点左侧(说明是做射线与 边的交点),则射线与边的全部交点数加一: if (dLon < ALon) { iSum++; } } } } if ((iSum % 2) != 0) { return true; } return false; } /** * 传入字符串坐标组;转为集合;114.288221,30.593268#114.321866,30.580559#114.311223,30.560015# * @param str * @return */ public static List getxyUtil(String str){ Listlist = new ArrayList<>(); while (str.indexOf("#")!=-1) { String str1 = str.substring(0, str.indexOf("#"));//40.01,40.12 Point pd = new Point(Double.valueOf(str1.substring(0, str1.indexOf(","))),Double.valueOf(str1.substring(str1.indexOf(",")+1))); list.add(pd); str=str.substring(str.indexOf("#")+1); } while (str.indexOf(";")!=-1) { String str1 = str.substring(0, str.indexOf(";"));//40.01,40.12 Point pd = new Point(Double.valueOf(str1.substring(0, str1.indexOf(","))),Double.valueOf(str1.substring(str1.indexOf(",")+1))); list.add(pd); str=str.substring(str.indexOf(";")+1); } return list; } /** * 获取多边形的中心 * @param str * @return */ public static PageData getCenterOfGravityPoint(String str ) { PageData data = new PageData(); ListmPoints = getxyUtil(str); double area = 0.0;//多边形面积 double Gx = 0.0, Gy = 0.0;// 重心的x、y for (int i = 1; i <= mPoints.size(); i++) { double iLat = mPoints.get(i % mPoints.size()).getX(); double iLng = mPoints.get(i % mPoints.size()).getY(); double nextLat = mPoints.get(i - 1).getX(); double nextLng = mPoints.get(i - 1).getY(); double temp = (iLat * nextLng - iLng * nextLat) / 2.0; area += temp; Gx += temp * (iLat + nextLat) / 3.0; Gy += temp * (iLng + nextLng) / 3.0; } Gx = Gx / area; Gy = Gy / area; data.put("x", String.valueOf(Gx).substring(0, String.valueOf(Gx).indexOf(".")+7)); data.put("y", String.valueOf(Gy).substring(0, String.valueOf(Gy).indexOf(".")+7)); return data; } }class Point { private Double x; private Double y; public Point (Double x , Double y) { this.x = x; this.y = y; } public Double getX() { return x; } public void setX(Double x) { this.x = x; } public Double getY() { return y; } public void setY(Double y) { this.y = y; } }