Mybatis-plus读取和保存geometry数据

建表

-- ----------------------------
-- Table structure for file_attribute_info
-- ----------------------------
DROP TABLE IF EXISTS "public"."file_attribute_info";
CREATE EXTENSION postgis;
CREATE EXTENSION postgis_topology;
CREATE TABLE "public"."file_attribute_info" (
"id" int8 NOT NULL GENERATED ALWAYS AS IDENTITY (
INCREMENT 1
MINVALUE  1
MAXVALUE 9223372036854775807
START 1
),
"file_key" varchar(500) COLLATE "pg_catalog"."default",
"attribute" json,
"geometry" geometry,
"time" timestamp(6)
)
;

-- ----------------------------
-- Primary Key structure for table file_attribute_info
-- ----------------------------
ALTER TABLE "public"."file_attribute_info" ADD CONSTRAINT "file_attribute_info_pkey" PRIMARY KEY ("id");

注意先安装插件配置

1. 引入postgis-jdbc包

    <dependency>
        <groupId>net.postgis</groupId>
        <artifactId>postgis-jdbc</artifactId>
        <version>2.5.0</version>
    </dependency>

1. 创建类型转换类MyGeometryTypeHandler

import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedTypes;
import org.postgis.PGgeometry;

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

@MappedTypes({String.class})
public class MyGeometryTypeHandler extends BaseTypeHandler<String> {
    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, String parameter, JdbcType jdbcType) throws SQLException {
        PGgeometry pGgeometry = new PGgeometry(parameter);
        ps.setObject(i, pGgeometry);
    }

    @Override
    public String getNullableResult(ResultSet rs, String columnName) throws SQLException {
        PGgeometry pGgeometry = new PGgeometry(rs.getString(columnName));
        if (pGgeometry == null) {
            return null;
        }
        return pGgeometry.toString();
    }

    @Override
    public String getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        PGgeometry pGgeometry = new PGgeometry(rs.getString(columnIndex));
        if (pGgeometry == null) {
            return null;
        }
        return pGgeometry.toString();
    }

    @Override
    public String getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {

        PGgeometry pGgeometry = new PGgeometry(cs.getString(columnIndex));
        if (pGgeometry == null) {
            return null;
        }
        return pGgeometry.toString();
    }
}

1. 在实体类配置typeHandler

 @TableField(typeHandler = MyGeometryTypeHandler.class)
 private String wkb;

查询语句：

SELECT ST_AsEWKT(file_attribute_info.geometry) from file_attribute_info

 

 带json的查询

select id, file_key, "attribute", geometry, "time" from "file_attribute_info" WHERE file_key='de4768ce814f4ac9a46678e50e178e0d' and ATTRIBUTE #>>'{KIND_CODE }'='11'