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：