[PG] postgis 使用ST_Within圈选某一个几何内的POI

前言

之前有一个需求，需要统计一批门店周边几公里餐饮，娱乐，购物，零售等类型的门店数量。

准备的数据有门店表 bj：

geom字段是根据门店坐标计算的到达圈

北京某分类的poi表 poi0419：

到达圈都需要提前刷好~

 

具体java实现demo

package com.demo;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import com.demo.DbHelper;

public class POICountLY {
	
	public static void main(String[] args) throws ClassNotFoundException {
		DbHelper db= new DbHelper();
//		 String url = "jdbc:mysql://localhost:3306/dataclean?"
//        + "user=root&password=root&useUnicode=true&characterEncoding=UTF8";  
//POSTGRES数据库
		String url = "jdbc:postgresql://192.168.8.133:5432/cxl?"
			 + "allowMultiQueries=true&useUnicode=true&characterEncoding=utf8"; 
		String user = "";
		String psw = "";
		try {
			Class.forName("org.postgresql.Driver");   // mysql 8
			//Class.forName("com.mysql.jdbc.Driver");      //mysql 5
			Connection	conn = DriverManager.getConnection(url,user,psw);
			Statement stmt = conn.createStatement();
			List geoms = new ArrayList();
			List kinds = new ArrayList();
			List ids = new ArrayList();
			//提取poi分类
			String sql ="select kind from ly_kind";
			List> data = db.queryForList(conn, sql);
			for(Map aMap : data ){
				String fls = aMap.get("kind"); 
				if(fls != null && !"".contentEquals(fls)) {
					kinds.add(fls);
				}
			}
			//提取门店 id ，geom
			String sql1 ="select id,geom from bj";
			List> data1 = db.queryForList(conn, sql1);
			for(Map aMap : data1 ){
				String id = aMap.get("id"); 
				String geom = aMap.get("geom"); 
				if(geom != null && !"".contentEquals(geom)) {
					ids.add(id);
					geoms.add(geom);	
				}
			}
			
			if (geoms != null && geoms.size() > 0) {
				
				for(int j = 0; j < geoms.size(); j++) {
					String geom = geoms.get(j);
					String id = ids.get(j);
					String sql3 = "select count(*) n,kind from poi0419 where ST_Within(geom::geometry,'"+geom+"'::geometry) and citycode='110099' group by kind";
					System.out.println(sql3);
					List> data3 = db.queryForList(conn, sql3);
					String sql4 = "insert into ly_bj  values("+id+")"; 
					stmt.execute(sql4);
					if(data3 != null && data3.size() > 0) {
						for (int x = 0; x < data3.size(); x++) {
							try {
								Map temp = data3.get(x);
								String num = temp.get("n");
								String kind = temp.get("kind");
								boolean flag = false;
								for(int n = 0; n < kinds.size(); n++) {
									if(kind.equals(kinds.get(n))){ flag = true;}
								}
								if(flag){
									String sql2 = "update ly_bj set t"+kind+"="+num+" where id="+ id +"";
									stmt.addBatch(sql2);
									if(x%100==0){
										//批量处理
										System.out.println("第"+x/100+"次执行语句");
										stmt.executeBatch();
										//清除stmt中积攒的参数列表
										stmt.clearBatch();
										System.out.println("第"+x/100+"次清除batch");
									}
								}
							} catch (Exception e) {
								System.out.println("错误信息:"+e);
								continue;
							}
							
						}
						stmt.executeBatch();
					}
					
				}
			}
		System.out.println("更新完毕");
		} catch (SQLException e) {
			e.printStackTrace();
		}
		
	}
	/**
        MYSQL数据库

    try {
			Class.forName("com.mysql.cj.jdbc.Driver");   // mysql 8
			//Class.forName("com.mysql.jdbc.Driver");      //mysql 5
			Connection	conn = DriverManager.getConnection(url,user,psw);
			Statement stmt = conn.createStatement();
			List citycodes = new ArrayList();
			List kinds = new ArrayList();
			String sql ="select distinct citycode from poi order by citycode";
			String sql1 ="select distinct kind from poi order by kind";
			List> data = db.queryForList(conn, sql);
			List> data1 = db.queryForList(conn, sql1);
			for(Map aMap : data ){
				String citycode = aMap.get("citycode"); 
				if(citycode != null && !"".contentEquals(citycode)) {
					citycodes.add(citycode);
				}
			}
			
			for(Map aMap : data1 ){
				String kind = aMap.get("kind"); 
				if(kind != null && !"".contentEquals(kind)) {
					kinds.add(kind);
				}
			}

			if (citycodes != null && citycodes.size() > 0) {
				for(int j = 0; j < citycodes.size(); j++) {
					String citycode = citycodes.get(j);
					String sql3 = "select count(*) n, kind from poi where citycode='" +citycode+ "' group by kind";
					List> data3 = db.queryForList(conn, sql3);
					String sql4 = "insert into citykind(city) values('"+citycode+"')"; 
					stmt.execute(sql4);
					
					if(data3 != null && data3.size() > 0) {
						for (int x = 0; x < data3.size(); x++) {
							Map temp = data3.get(x);
							String num = temp.get("n");
							String kind = temp.get("kind");
							String sql2 = "update citykind set `"+kind+"`='"+num+"' where city='"+ citycode +"'";
							stmt.addBatch(sql2);
							if(x%100==0){

								//批量处理
								System.out.println("第"+x/100+"次执行语句");
								stmt.executeBatch();
								//清除stmt中积攒的参数列表
								stmt.clearBatch();
								System.out.println("第"+x/100+"次清除batch");
							}
						}
						stmt.executeBatch();
					}
					
				}
			}
			
		System.out.println("更新完毕");
		} catch (SQLException e) {
			e.printStackTrace();
		}
		
		
	}
	


**/
}



DbHelper.class
package com.demo;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;


public class DbHelper {
	
	public List> queryForList(Connection conn, String sql, Object... params) {
		PreparedStatement stat = null;
		ResultSet rs = null;
		try {
//			params = Arrays.copyOf(params, params.length + 2);
//			params[params.length - 2] = (pageIndex * pageSize);
//			params[params.length - 1] = pageSize;
			stat = prepared(conn, sql, params);
			rs = stat.executeQuery();
			ResultSetMetaData meta = rs.getMetaData();
			List cols = new ArrayList();
			for (int i = 0, count = meta.getColumnCount(); i < count; i++) {
				cols.add(meta.getColumnLabel(i+1));
			}
			final String[] label = cols.toArray(new String[cols.size()]);
			List> list = new LinkedList>();
			while (rs.next()) {
				final Map row = new HashMap(label.length);
				for (int i = 0, count = label.length; i < count; i++) {
					row.put(label[i], rs.getString(i+1));
				}
				list.add(row);
			}
			return list;
		} catch (Exception e) {
			throw new RuntimeException(e);
		} finally {
			close(stat, rs);
		}
	}
	
	public long queryForLong(Connection conn, String sql, Object... params) {
		PreparedStatement stat = null;
		ResultSet rs = null;
		try {
			stat = prepared(conn, sql, params);
			rs = stat.executeQuery();
			rs.next();
			Object obj = rs.getObject(1);
			if (obj instanceof Long) {
				return ((Long) obj).longValue();
			} else if (obj instanceof Integer) {
				return ((Integer) obj).longValue();
			} else {
				return Long.valueOf(obj.toString()).longValue();
			}
		} catch (Exception e) {
			throw new RuntimeException(e);
		} finally {
			close(stat, rs);
		}
	}

	public int queryForInt(Connection conn, String sql, Object... params) {
		PreparedStatement stat = null;
		ResultSet rs = null;
		try {
			stat = prepared(conn, sql, params);
			rs = stat.executeQuery();
			rs.next();
			Object obj = rs.getObject(1);
			if (obj instanceof Long) {
				return ((Long) obj).intValue();
			} else if (obj instanceof Integer) {
				return ((Integer) obj).intValue();
			} else {
				return Integer.valueOf(obj.toString()).intValue();
			}
		} catch (Exception e) {
			throw new RuntimeException(e);
		} finally {
			close(stat, rs);
		}
	}

	

	public PreparedStatement prepared(Connection conn, String sql,
			Object... params) {
		try {
			PreparedStatement stat = conn.prepareStatement(sql);
			if (params.length > 0) {
				for (int i = 0, count = params.length; i < count; i++) {
					stat.setObject(i + 1, params[i]);
				}
			}
			return stat;
		} catch (SQLException e) {
			throw new RuntimeException("fail to generate preparedStatement", e);
		}
	}

	public void close(Connection conn, Statement st) {
		if (st != null) {
			try {
				st.close();
			} catch (SQLException e) {
			}
			st=null;
		}
		if (conn != null) {
			try {
				conn.close();
			} catch (SQLException e) {
			}
			conn=null;
		}
	}

	public void close(Statement st, ResultSet rs) {
		if (rs != null) {
			try {
				rs.close();
			} catch (SQLException e) {
			}
			rs=null;
		}
		if (st != null) {
			try {
				st.close();
			} catch (SQLException e) {
			}
			st = null;
		}
	}

	public void close(Connection conn, Statement st, ResultSet rs) {
		if (rs != null) {
			try {
				rs.close();
			} catch (SQLException e) {
			}
			rs=null;
		}
		close(conn, st);
	}

}

结果表 ly_bj： 

 ST_Within：

boolean ST_Within(geometry A, geometry B);

对比两个几何是否相等，返回布尔值~