划重点：
column=“cellBorder” property=“cellBorder” jdbcType=“CLOB” typeHandler="org.apache.ibatis.type.ClobTypeHandler

oracle大字段CLOB转为String接收（mybatis）

<resultMap id="CellCoordinateMap" type="com.ids.test.dto.CellCoordinateDto" >
        <result column="cellName" property="cellName" jdbcType="VARCHAR" />
        <result column="cellBorder" property="cellBorder" jdbcType="CLOB" typeHandler="org.apache.ibatis.type.ClobTypeHandler"/>
    </resultMap>

    
    <select id="selectBorder" resultMap="CellCoordinateMap">
        SELECT AOI_NAME AS cellName, OUTLINE AS cellBorder
        FROM CHG_GPS_TEST
       
    </select>

dto定义字段用String

@Data
public class CellCoordinateDto {
    @ApiModelProperty(value = "小区名")
    private String cellName;
    @ApiModelProperty(value = "小区边缘经纬度")
    private String cellBorder;
}