GisUtil工具类：将WKT(wellKnownText)文本转换为ElasticSearch识别的空间对象字符串形式

ElasticSearch中的Geo Shape Type：

https://www.elastic.co/guide/en/elasticsearch/reference/1.4/mapping-geo-shape-type.html

 

从熟知文本或熟知二进制数据中生成的 ST_Geometry：

http://resources.arcgis.com/zh-cn/help/main/10.2/index.html#/na/002n0000006n000000/

 

package com.nihaorz.utils;

import com.vividsolutions.jts.geom.*;
import com.vividsolutions.jts.io.ParseException;
import com.vividsolutions.jts.io.WKTReader;
import org.geotools.geometry.jts.JTSFactoryFinder;

/**
 * Created by Administrator on 2016/4/1.
 */
public class GisUtil {

    private final static WKTReader wktReader = new WKTReader(JTSFactoryFinder.getGeometryFactory());

    /**
     * 将WKT文本字符串转换为ES中的GeoShape字符串格式
     * @param wkt
     * @return
     * @throws ParseException
     */
    public static String getESGeoTextFromWkt(String wkt) throws ParseException {
        String result = null;
        Geometry geom = wktReader.read(wkt);
        String type = geom.getClass().getSimpleName().toLowerCase();
        Point point;
        MultiPoint multiPoint;
        LineString lineString;
        MultiLineString multiLineString;
        Polygon polygon;
        MultiPolygon multiPolygon;
        if(type.equals("point")){
            point = (Point) geom;
            result = getESPointText(point);
        }else if(type.equals("linestring")){
            lineString = (LineString) geom;
            result = getESLineStringText(lineString);
        }else if(type.equals("polygon")){
            polygon = (Polygon) geom;
            result = getESPolygonText(polygon);
        }else if(type.equals("multipoint")){
            multiPoint = (MultiPoint) geom;
            result = getESMultiPointText(multiPoint);
        }else if(type.equals("multilinestring")){
            multiLineString = (MultiLineString) geom;
            result = getESMultiLineStringText(multiLineString);
        }else if(type.equals("multipolygon")){
            multiPolygon = (MultiPolygon) geom;
            result = getESMultiPolygonText(multiPolygon);
        }
        return result;
    }

    /**
     * 通过MultiPolygon对象拼接中括号表示的字符串
     * @param multiPolygon
     * @return
     */
    private static String getESMultiPolygonText(MultiPolygon multiPolygon) throws ParseException {
        Polygon polygon;
        int num = multiPolygon.getNumGeometries();
        StringBuffer sb = new StringBuffer("[");
        for(int i = 0; i < num; i++){
            polygon = (Polygon) multiPolygon.getGeometryN(i);
            sb.append(getESPolygonText(polygon)+",");
        }
        sb.setCharAt(sb.length() - 1, ']');
        return sb.toString();
    }

    /**
     * 通过MultiLineString对象拼接中括号表示的字符串
     * @param multiLineString
     * @return
     */
    private static String getESMultiLineStringText(MultiLineString multiLineString) {
        LineString lineString;
        int num = multiLineString.getNumGeometries();
        StringBuffer sb = new StringBuffer("[");
        for(int i = 0; i < num; i++){
            lineString = (LineString) multiLineString.getGeometryN(i);
            sb.append(getESLineStringText(lineString)+",");
        }
        sb.setCharAt(sb.length() - 1, ']');
        return sb.toString();
    }

    /**
     * 通过MultiPoint对象拼接中括号表示的字符串
     * @param multiPoint
     * @return
     */
    private static String getESMultiPointText(MultiPoint multiPoint) {
        Point point;
        int num = multiPoint.getNumGeometries();
        StringBuffer sb = new StringBuffer("[");
        for(int i = 0; i < num; i++){
            point = (Point) multiPoint.getGeometryN(i);
            sb.append(getESPointText(point)+",");
        }
        sb.setCharAt(sb.length() - 1, ']');
        return sb.toString();
    }

    /**
     * 通过Polygon对象拼接中括号表示的字符串
     * @param polygon
     * @return
     * @throws ParseException
     */
    private static String getESPolygonText(Polygon polygon){
        String result;
        /**
         * 内部闭合环形的数量
         */
        int num = polygon.getNumInteriorRing();
        if(num > 0){
            StringBuffer sb = new StringBuffer("["+getESLineStringText(polygon.getExteriorRing())+",");
            for(int i = 0; i < num; i++){
                sb.append(getESLineStringText(polygon.getInteriorRingN(i))+",");
            }
            sb.setCharAt(sb.length() - 1, ']');
            result = sb.toString();
        }else{
            result = "["+getESLineStringText(polygon.getExteriorRing())+"]";
        }
        return result;
    }

    /**
     * 通过LineString对象拼接中括号表示的字符串
     * @param lineString
     * @return
     */
    public static String getESLineStringText(LineString lineString){
        Coordinate[] corrds = lineString.getCoordinates();
        StringBuffer sb = new StringBuffer("[");
        for(Coordinate corrd : corrds) {
            sb.append(getCoordinateText(corrd)+",");
        }
        sb.setCharAt(sb.length() - 1, ']');
        return sb.toString();
    }

    /**
     * 通过Point对象拼接中括号表示的字符串
     * @param point
     * @return
     */
    public static String getESPointText(Point point){
        return getCoordinateText(point.getCoordinate());
    }

    /**
     * 通过Coordinate对象拼接中括号表示的字符串
     * @param coord
     * @return
     */
    public static String getCoordinateText(Coordinate coord) {
        return "["+coord.x+","+coord.y+"]";
    }

}

　　

　

附：

空心面的WKT文本格式：

POLYGON  (( 114.69311270 32.15375671, 114.69311270 30.38273703, 117.16663685 30.38273703, 117.16663685 32.15375671, 114.69311270 32.15375671),( 115.46055456 31.36860465, 115.96824687 31.67558140, 116.33425760 31.37450805, 115.81475850 31.01440072, 115.46055456 31.36860465))

ArcMap中的预览效果：