elasticsearch6.3.2学习记录三 《geo 地理位置空间查询》

一、查询多边形的地理位置范围

public String ploygeoSearch(@RequestBody Object json) {
        TransportClient client;
        try {
            /**List list = JSONObject.fromObject(json).getJSONArray("list");
            String keyword = JSONObject.fromObject(json).getString("keyVal");
            //指定一个区域，由三个或以上坐标点组成
            List<GeoPoint> points = new ArrayList<>();
            for (int i=0;i<list.size();i++){
                String pointStr = list.get(i).toString();
                String wkt = pointStr.substring(1,pointStr.length()-1);
                String[] point = wkt.split(",");
                double lat = Double.parseDouble(point[0])/1000.0;
                double lon = Double.parseDouble(point[1])/1000.0;
                if (lat>90) lat=90.000000;
                if (lat<-90) lat = -90.000000;
                if (lon>180) lon = 180.000000;
                if (lon<-180) lon = -180.000000;
                points.add(new GeoPoint(lat, lon));
            }**/
            List<GeoPoint> points = new ArrayList<>();//纬度，经度
            points.add(new GeoPoint(21.01, 23.10));//纬度，经度
            points.add(new GeoPoint(25.01, 53.10));
            points.add(new GeoPoint(41.01, 43.10));


 GeoPolygonQueryBuilder gpqb = QueryBuilders.geoPolygonQuery("pin.location", points);
            //多条件设置
            QueryBuilder queryBuilder = null;
            MatchPhraseQueryBuilder mpqb = null;


            if (!"".equals(keyword)){
                mpqb = QueryBuilders.matchPhraseQuery("DISTRICT",keyword);
                queryBuilder = QueryBuilders.boolQuery()
                        .must(mpqb)
                        .must(gpqb);
            }else {//如果没有输入关键字 只进行区域范围查询 
                queryBuilder = QueryBuilders.boolQuery()
                        .must(gpqb);
            }

            client = EsUtil.getClient();
            SearchResponse searchResponse = client.prepareSearch(indexName)
                    .setTypes(indexType)
                    .setSize(Integer.parseInt(searchSize))
                    .setQuery(queryBuilder)
                    .get();
            long totalHits = searchResponse.getHits().totalHits;//命中个数
            SearchHit[] searchHits = searchResponse.getHits().getHits(); //执行检索
            //返回结果
            List result = new ArrayList();
            for (int i = 0; i < searchHits.length; i++) {
                result.add(JSONObject.fromObject(searchHits[i].getSourceAsString()));
            }
            return result.toString();
        }catch (Exception e){
            e.printStackTrace();
            return "检索失败";
        }
    }






/**
     * 获取客户端
     * @return
     */
    public static TransportClient getClient() {
        try {
            TransportClient client;
            Settings esSettings = Settings.builder()
                    .put("cluster.name", "elasticsearch") //设置ES实例的名称
                    .put("client.transport.sniff", true) //自动嗅探整个集群的状态，把集群中其他ES节点的ip添加到本地的客户端列表中
                    .put("client.transport.ignore_cluster_name", true)  //如果集群名不对，也能连接
                    .build();
            client = new PreBuiltTransportClient(esSettings);//初始化client较老版本发生了变化，此方法有几个重载方法，初始化插件等。
            //此步骤添加IP，至少一个，其实一个就够了，因为添加了自动嗅探配置
            client.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("127.0.0.1"), 9300));
            return client;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

二、参考 Elasticsearch Java API 的使用（7）—多条件查询