Mybatis-plus读取和保存Postgis geometry数据

配置

1. 引入postgis-jdbc包

    
        net.postgis
        postgis-jdbc
        2.5.0
    

2. 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 {
    @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();
    }
}

3. 在实体类配置typeHandler

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