JTS:04 读取数据库数据

版本

org.locationtech.jts:jts-core:1.19.0
链接: github

数据库

创建数据库方式

1. postgresql，使用postgis插件
2. kartoza/postgis:15-3.3 使用docker容器

-- 创建表结构
CREATE TABLE temp_tb_geometry(
	id serial4,
	wkt_geometry geometry,
	PRIMARY KEY (id)
)
-- 插入数据
INSERT INTO temp_tb_geometry(wkt_geometry) VALUES 
('SRID=4326;POINT(118.7043304 32.0419021)')

代码

import org.locationtech.jts.io.WKBReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.sql.*;

public class PostgresStu {

    private final static String url = "jdbc:postgresql://192.168.111.128:5432/postgres";

    private final static String user = "postgres";

    private final static String password = "postgres";

    private static final Logger LOGGER = LoggerFactory.getLogger(PostgresStu.class);

    public static void main(String[] args) throws Exception {
        WKBReader wkbReader = new WKBReader();
        Connection conn = DriverManager.getConnection(url, user, password);
        LOGGER.info("连接是否关闭：{}", conn.isClosed());

        String sql = "SELECT * FROM temp_tb_geometry";
        Statement statement = conn.createStatement();
        ResultSet resultSet = statement.executeQuery(sql);

        while (resultSet.next()) {
            String id = resultSet.getString("id");
            String wkt_geometry = resultSet.getString("wkt_geometry");
            LOGGER.info("Key: {}, value: {}", id, wkbReader.read(WKBReader.hexToBytes(wkt_geometry)));
        }
    }
}

运行结果

17:53:56.426 [main] INFO  pers.stu.sql.PostgresStu - 连接是否关闭：false
17:53:56.465 [main] INFO  pers.stu.sql.PostgresStu - Key: 1, value: POINT (118.7043304 32.0419021)