用java为mongodb创建地理空间查询

我做我的项目。它与MongoDB和Java相关。我需要从MongoDB获取多边形数据

但是，我的查询始终未返回任何记录

以下是我的java代码：

 string coords = "28.56402,79.93652a27.27569,26.16394a42.69404,20.02808a48.61541,51.37207a"
 String[] coors = coords.split("a")
 final LinkedList<double[]> polygon = new LinkedList<double[]>();
 for(int i= 0;i<coors.length;i++)
 {
    String[] coo = coors[i].split(",");
    System.out.println("coors" + i + " : " + coors[i]);
    polygon.addLast(new double[]{Double.parseDouble(coo[0]),Double.parseDouble(coo[1])});
 }
 BasicDBObject query = new BasicDBObject("loc", new BasicDBObject("$within", new BasicDBObject("$polygon", polygon)));
 FindIterable<Document> results = this.getMongoCollectionProcessor().queryDocument(query);
 MongoCursor<Document> resultsIterator = results.iterator();

查询计数为零

我做错了什么？你能帮助我吗？

---

谢谢。

您可以尝试以下查询

Geopolygon将阵列阵列作为坐标。使用

过滤器。geoWithinPolygon

辅助方法，因为

中的
已被弃用

 String coords = "28.56402,79.93652a27.27569,26.16394a42.69404,20.02808a48.61541,51.37207a";
 String[] coors = coords.split("a");
 final List<List<Double>> polygons = new ArrayList<>();

 for(int i= 0;i<coors.length;i++)
    {
       String[] coo = coors[i].split(",");
       System.out.println("coors" + i + " : " + coors[i]);
       polygons.add(Arrays.asList(Double.parseDouble(coo[0]),Double.parseDouble(coo[1])));
    }

 Bson query = Filters.geoWithinPolygon("loc", polygons);
 FindIterable<Document> results = this.getMongoCollectionProcessor().queryDocument(query);
 MongoCursor<Document> resultsIterator = results.iterator();

谢谢你的回答，但它再次返回零。输出查询是：运算符筛选器{fieldName='loc'，运算符='$geointen'，值={“$polygon”：[[13.82608128.03467]，[13.82608128.03467]，[13.82608128.03467]，[13.82608128.03467]}。当我在mongoBooster上运行这个查询时，我收到了“Loop is not closed”（循环未关闭）。您是否尝试使用最新的代码？为什么所有的坐标都一样？我没有数据要测试。它应该是
[[13.82608128.03467]，[13.82608128.03467]，[13.82608128.03467]，[13.82608128.03467]，[13.82608128.03467]
是的，我试过了。坐标相同，因为这些坐标有数据。你能在mongo booster中运行这个查询吗<代码>{loc:{$geointen:{$geometry:{$type:{Polygon'，坐标：[[13.82608128.03467]，[13.82608128.03467]，[13.82608128.03467]，[13.82608128.03467]}}
它返回的错误是“经度/纬度超出范围，lng:13.8261纬度：128.035”
 String coords = "28.56402,79.93652a27.27569,26.16394a42.69404,20.02808a48.61541,51.37207a";
 String[] coors = coords.split("a");
 final List<List<Double>> polygons = new ArrayList<>();

 for(int i= 0;i<coors.length;i++)
    {
       String[] coo = coors[i].split(",");
       System.out.println("coors" + i + " : " + coors[i]);
       polygons.add(Arrays.asList(Double.parseDouble(coo[0]),Double.parseDouble(coo[1])));
    }

 Bson query = Filters.geoWithinPolygon("loc", polygons);
 FindIterable<Document> results = this.getMongoCollectionProcessor().queryDocument(query);
 MongoCursor<Document> resultsIterator = results.iterator();

{
    loc: {
        $geoWithin: {
            $geometry: {
                type: "Polygon",
                coordinates: [
                    [
                        [28.56402, 79.93652],
                        [27.27569, 26.16394],
                        [42.69404, 20.02808],
                        [48.61541, 51.37207]
                    ]
                ]
            }
        }
    }
}