EsriJSON与GeoJSON转换工具类

EsriJSON与GeoJSON转换工具类。简单的点线面应该没问题，复杂的可能有问题，没具体测试。大家可以在这个基础上修改。后面用起来慢慢修正吧。package piesat.geo;import com.alibaba.fastjson.JSON;
import  com.alibaba.fastjson.JSONObject;
import org.apache.commons.lang3.StringUtils;import java.math.BigDecimal;
import java.util.*;public class EsriGeoJsonUtil {public static String esri2geo(String ersiJson){Map geoMap = new HashMap();try {List geoFs = new ArrayList();geoMap.put("type", "FeatureCollection");Map esriMap = (Map) JSON.parse(ersiJson);Object esriFs = esriMap.get("features");if(esriFs instanceof List){esriFs = (List<Map<String, Object>>) esriFs;for(int i=0; i< ((List) esriFs).size(); i++){Map esriF = (Map) ((List) esriFs).get(i);Map geoF = new HashMap();geoF.put("type", "Feature");geoF.put("properties", esriF.get("attributes"));Map<String, Object> geometry = (Map<String, Object>) esriF.get("geometry");if(null != geometry.get("x")){geoF.put("geometry", geoPoint(geometry));}else if(null != geometry.get("points")){geoF.put("geometry", geoPoints(geometry));}else if(null != geometry.get("paths")){geoF.put("geometry", geoLine(geometry));}else if(null != geometry.get("rings")){geoF.put("geometry", geoPoly(geometry));}geoFs.add(geoF);}geoMap.put("features", geoFs);}}catch (Exception e){e.printStackTrace();}return new JSONObject(geoMap).toString();}public static String geo2ersi(String geoJson, String idAttribute){Map esriMap = new HashMap();try {Map geoMap = (Map) JSON.parse(geoJson);esriMap = getEsriGeo(geoMap, idAttribute);Map spatialReference = new HashMap();spatialReference.put("wkid", 4326);esriMap.put("spatialReference",spatialReference);}catch (Exception e){e.printStackTrace();}return new JSONObject(esriMap).toString();}public static Map getEsriGeo(Map geoMap, String idAttribute){Map esriMap = new HashMap();idAttribute = StringUtils.isNotEmpty(idAttribute)? idAttribute:"OBJECTID";String type = geoMap.get("type").toString();switch (type){case "Point":List<BigDecimal> coords = (List<BigDecimal>) geoMap.get("coordinates");esriMap.put("x", coords.get(0));esriMap.put("y", coords.get(1));break;case "MultiPoint":esriMap.put("points",geoMap.get("coordinates"));break;case "LineString":List<Object> coordsList = new ArrayList<>();coordsList.add(geoMap.get("coordinates"));esriMap.put("paths",coordsList);break;case "MultiLineString":esriMap.put("paths",geoMap.get("coordinates"));break;case "Polygon":List<List<List<BigDecimal>>> coordinates = (List<List<List<BigDecimal>>>) geoMap.get("coordinates");List<List<List<BigDecimal>>> rings = orientRings(coordinates);esriMap.put("rings", rings);break;case "MultiPolygon":List<List<List<List<BigDecimal>>>> mcoordinates = (List<List<List<List<BigDecimal>>>>) geoMap.get("coordinates");List<List<List<BigDecimal>>> mrings = flattenMultiPolygonRings(mcoordinates);esriMap.put("rings", mrings);break;case "Feature":if (null != geoMap.get("geometry")) {Map geometry = getEsriGeo((Map) geoMap.get("geometry"), idAttribute);esriMap.put("geometry", geometry);}if(null != geoMap.get("properties")){Map properties = (Map) geoMap.get("properties");if (null != geoMap.get("id")) {properties.put(idAttribute, geoMap.get("id"));}esriMap.put("attributes", properties);}break;case "FeatureCollection":List<Object> esriFs = new ArrayList<>();List<Map> features = (List<Map>) geoMap.get("features");for (int i = 0; i < features.size(); i++) {esriFs.add(getEsriGeo(features.get(i), idAttribute));}esriMap.put("features", esriFs);esriMap.put("geometryType","esriGeometryPolygon");break;case "GeometryCollection":List<Object> esriFsc = new ArrayList<>();List<Map> geometries = (List<Map>) geoMap.get("geometries");for (int i = 0; i < geometries.size(); i++) {esriFsc.add(getEsriGeo(geometries.get(i), idAttribute));}esriMap.put("geometries", esriFsc);esriMap.put("geometryType","esriGeometryPolygon");break;}return esriMap;}public static Map geoPoint(Map<String, Object> geometry){Map geo = new HashMap();geo.put("type", "point");BigDecimal x = (BigDecimal) geometry.get("x");BigDecimal y = (BigDecimal) geometry.get("y");List<BigDecimal> coords = new ArrayList<>();coords.add(x);coords.add(y);geo.put("coordinates", coords);return geo;}public static Map geoPoints(Map<String, Object> geometry){Map geo = new HashMap();List<Object> points = (List<Object>) geometry.get("points");if(points.size()==1){geo.put("type", "Point");geo.put("coordinates", points.get(0));}else{geo.put("type", "MultiPoint");geo.put("coordinates", points);}return geo;}public static Map geoLine(Map<String, Object> geometry){Map geo = new HashMap();List<Object> paths = (List<Object>) geometry.get("paths");if(paths.size()==1){geo.put("type", "LineString");geo.put("coordinates", paths.get(0));}else{geo.put("type", "MultiLineString");geo.put("coordinates", paths);}return geo;}public static Map geoPoly(Map<String, Object> geometry){Map geo = new HashMap();List<List<List<BigDecimal>>> rings = (List<List<List<BigDecimal>>>) geometry.get("rings");if(rings.size()==1){geo.put("type", "Polygon");geo.put("coordinates", rings);}else{List<List<List<List<BigDecimal>>>> coords = new ArrayList();String type = "";int len = coords.size() - 1;for(int i=0; i< rings.size(); i++){if(ringIsClockwise( rings.get(i))){List<List<List<BigDecimal>>> item = new ArrayList<>();item.add(rings.get(i));coords.add(item);len++;}else{coords.get(len).add(rings.get(i));}}if(coords.size() == 1){type="Polygon";}else{type="MultiPolygon";}geo.put("type", type);geo.put("coordinates",coords.size()==1?coords.get(0): coords);}return geo;}public static boolean ringIsClockwise(List<List<BigDecimal>> rings){int total = 0;List<BigDecimal> pt1 = null;List<BigDecimal> pt2 = null;for(int i=0; i< rings.size()-1; i++){pt1 = rings.get(i);pt2 = rings.get(i+1);total += (pt2.get(0).doubleValue() - pt1.get(0).doubleValue())*  (pt2.get(1).doubleValue() + pt1.get(1).doubleValue());}return total>=0;}public static List<List<List<BigDecimal>>> orientRings ( List<List<List<BigDecimal>>> polygon) {List<List<List<BigDecimal>>> ringsList = new ArrayList<>();List<List<BigDecimal>> outerRing = closeRing(polygon.get(0));if (outerRing.size() >= 4) {if (!ringIsClockwise(outerRing)) {Collections.reverse(outerRing);}ringsList.add(outerRing);polygon.remove(0);for (int i = 0; i < polygon.size(); i++) {List<List<BigDecimal>> hole = closeRing(polygon.get(i));if (hole.size() >= 4) {if (ringIsClockwise(hole)) {Collections.reverse(hole);}ringsList.add(hole);}}}return ringsList;}public static List<List<BigDecimal>> closeRing (List<List<BigDecimal>> coords) {if (!pointsEqual(coords.get(0), coords.get(coords.size()-1))) {coords.add(coords.get(0));}return coords;}public static boolean pointsEqual (List<BigDecimal> a, List<BigDecimal> b) {for (int i = 0; i < a.size(); i++) {if (a.get(i).compareTo(b.get(i)) != 0) {return false;}}return true;}public static List<List<List<BigDecimal>>> flattenMultiPolygonRings (List<List<List<List<BigDecimal>>>> rings) {List<List<List<BigDecimal>>> polygonList = new ArrayList<>();for (int i = 0; i < rings.size(); i++) {List<List<List<BigDecimal>>> polygons = orientRings(rings.get(i));for (int x = polygons.size() - 1; x >= 0; x--) {List<List<BigDecimal>> polygon = polygons.get(x);polygonList.add(polygon);}}return polygonList;}
}

EsriJSON与GeoJSON转换工具类相关推荐

android 字体像素转换工具类_Android中px与dip，sp与dip等的转换工具类
Android中px与dip,sp与dip等的转换工具类功能通常在代码中设置组件或文字大小只能用px,通过这个工具类我们可以把dip(dp)或sp为单位的值转换为以px为单位的值而保证大小不变.方 ...
java gson 工具类_GSON 实体转换工具类
/** * Gson转换工具类 */ public class GsonUtils { /** * @param jsonString * json字符串 * @param cl ...
android 日期时间类,Android 日期时间等转换工具类
package com.easyder.util; import java.text.SimpleDateFormat; import java.util.Date; /** * 日期时间等转换工具类 ...
android 字体像素转换工具类_android px,dp,sp大小转换工具
package com.voole.playerlib.util; import android.content.Context; /** * Android大小单位转换工具类 * * float s ...
java 视频转码工具类_JavaCV入门指南：FrameConverter转换工具类及CanvasFrame图像预览工具类（javaCV教程完结篇）...
JavaCV入门指南:FrameConverter转换工具类及CanvasFrame图像预览工具类(javaCV教程完结篇) 前言再此章之前,我们已经详细介绍和剖析了javacv的结构和ffmpeg ...
java字体颜色编程_Java 字体颜色转换工具类 ColorUtil
Java 字体颜色转换工具类 ColorUtil,Java 字体颜色转换工具类 ColorUtil-- import java.awt.Color; import jxl.format.Colour; ...
Java 字体颜色转换工具类 ColorUtil
import java.awt.Color; import jxl.format.Colour; /** *字体颜色转换工具类 * @author tanghui * */ pu ...
自定义java对象转换工具类
背景项目中经常有VO.PO.DTO等之间转换,由于apache工具类中BeanUtils.copyProperties及Json序列化反序列化方式转换性能比较低(阿里巴巴规范检查有提示不建议采用). ...
ImageTools-图片格式转换工具类
/*** 图片转换工具类*/ public final class ImageTools {/*** Transfer drawable to bitmap 把drawable转换为bitmap** ...

EsriJSON与GeoJSON转换工具类

EsriJSON与GeoJSON转换工具类相关推荐

最新文章

热门文章