本文借鉴 http://blog.csdn.net/fdipzone/article/details/46285521
Java 代码
//查询地理位置的条件
List<JSONObject> listJson=new ArrayList<>()
Double lng = 113.323568d
Double lat = 23.146436d
Integer radius =1000
Position pt = new Position(lng,lat)
Point po = new Point(pt)
Filters.nearSphere("loc",po,radius.doubleValue(),0.00)
MongoCursor<Document> list=MongoDBUtil.find(db, Filters.nearSphere("loc",po ,radius.doubleValue(),0.00))
while(list.hasNext()){
Document d=list.next()
listJson.add(JSON.parseObject(diyObjectIdToJson(d)))
}
System.out.println(listJson.toString())
1.创建lbs集合存放地点坐标
b.lbs.insert(
{
loc:{
type: "Point",
coordinates: [113.332264, 23.156206]
},
name: "广州东站"
}
db.lbs.insert(
{
loc:{
type: "Point",
coordinates: [113.330611, 23.147234]
},
name: "林和西"
}
)
db.lbs.insert(
{
loc:{
type: "Point",
coordinates: [113.328095, 23.165376]
},
name: "天平架"
}
)
2.创建地理位置索引
db.lbs.ensureIndex(
{
loc: "2dsphere"
}
)
3.查询附近的坐标
当前位置为:时代广场,
坐标:113.323568, 23.146436
搜寻附近一公里内的点,由近到远排序
db.lbs.find(
{
loc: {
$near:{
$geometry:{
type: "Point",
coordinates: [113.323568, 23.146436]
},
$maxDistance: 1000
}
}
}
)