/**
* 根据经度、纬度获取区域编码
*
* @param lon 经度
* @param lat 纬度
* @return
* @throws Exception long
*/
public static long getAreaAnalyzer(double lon, double lat) throws Exception {
long areacode = -1;
Geometry geo = new GeometryFactory().createPoint(new Coordinate(lon, lat));
List<?> areas = areaTree.query(geo.getEnvelopeInternal());
for (Object obj : areas) {
AreaNode anode = (AreaNode) obj;
if (anode.getPolygon().contains(geo)) {
areacode = anode.getAreaCode();
break;
}
}
return areacode;
}
/**
* areaTree全国区域拓扑树初始化
*
* @param fileName
* @throws Exception void
*/
public static void buildTree(String fileName) throws Exception {
FileInputStream fis = new FileInputStream(new File(fileName));
BufferedReader br = new BufferedReader(new InputStreamReader(fis, "utf-8"));
String line = null;
AreaNode node = null;
while ((line = br.readLine()) != null) { // 读取区域文件
String[] lines = line.split(";");
Geometry polygon = new WKTReader().read(lines[lines.length - 1]);
node = new AreaNode(); // 创建节点
node.setAreaCode(Long.parseLong(lines[0]));
node.setAreaName(lines[1]);
node.setPolygon(polygon);
areaTree.insert(polygon.getEnvelopeInternal(), node); // 向树上添加节点
}
fis.close();
br.close();
areaTree.build(); // 构建树
}