使用java的mongodb shell查詢

Question

如何寫這個mongodb使用java的shell查詢？

查詢：db.building_feature.find({geometry : {$geoIntersects :{$geometry :{type : "Polygon", coordinates :[[[37.59777,55.73216],[37.59805,55.77615],[37.68710,55.77643],[37.68517,55.73290],[37.59777,55.73216]]]}}}})

我收藏GeoSpatialIndex是 「2dsphere」。

我的版本，它不工作：

DBCollection testCollection = db.getCollection("building_feature"); 
final LinkedList<double[]> geo = new LinkedList<>(); 
geo.addLast(new double[]{37.59777, 55.73216}); 
geo.addLast(new double[]{37.59805, 55.77615}); 
geo.addLast(new double[]{37.68710, 55.77643}); 
geo.addLast(new double[]{37.68517, 55.73290}); 

final BasicDBObject query 
    = new BasicDBObject("geometry", new BasicDBObject("$within", new BasicDBObject("$geometry", geo))); 
System.out.println("Result Count : " + testCollection.find(query).count()); 

感謝。

Answer 1

你應該在編寫Java完全相同的查詢：

BasicDBObject polygon = new BasicDBObject("type", "Polygon"); 
polygon.put("coordinates", <myArray>); 

BasicDBObject query = new BasicDBObject(
    "geometry", new BasicDBObject(
     "$geoIntersects", new BasicDBObject(
      "$geometry", polygon 
     ) 
    ) 
); 

<myArray>是您的三重嵌套double[][][] GeoJSON的多邊形座標數組。

順便說一句，它可以更清楚地閱讀一個JSON字符串，然後JSON.parse。

而且我覺得$whithin運營商不MongoDB中存在...