Two implementations of Mybatis return arrays

<resultMap type="Return to entity class"  >
		<result property="Entity Class Field Name" column="mysql field name" typeHandler="Processing Class"/>
</resultMap>

<select  parameterType="Transferred Parameter Type" resultMap="resultMap id">
    select pricture from xm_picture
</select>

<resultMap type=""  >
		<result property="pictureArr" column="picture" typeHandler=""/>
</resultMap>

<!-- parameterType It can also be an entity class -->
<select  parameterType="Long" resultMap="PictureResult">
    select pricture from xm_picture where id = #{id}
</select>

@Select("<script>" +
" select picture from xm_picture where id = #{id} " +
"</script>")
@Results({@Result(property="Entity Class Field Name",column="Database field name",typeHandler= Processing class.class)})
PictureDto selectById(Long id);

@Select("<script>" +
" select picture from xm_picture where id = #{id} " +
"</script>")
@Results({@Result(property="pictureArr",column="picture",typeHandler= )})
PictureDto selectById(Long id);

import ;
import ;
import ;
import ;

import ;
import ;
import ;
import ;

@MappedJdbcTypes({})
public class JsonStringArrayTypeHandler extends BaseTypeHandler<String[]> {
    private static final ObjectMapper mapper = new ObjectMapper();

    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, String[] parameter, JdbcType jdbcType) throws SQLException {
        (i, toJson(parameter));
    }

    @Override
    public String[] getNullableResult(ResultSet rs, String columnName) throws SQLException {
        return ((columnName));
    }

    @Override
    public String[] getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        return ((columnIndex));
    }

    @Override
    public String[] getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        return ((columnIndex));
    }

    private String toJson(String[] params) {
        try {
            return (params);
        } catch (Exception e) {
            ();
        }
        return "[]";
    }

    private String[] toObject(String content) {
        if (content != null && !()) {
            try {
                return (String[]) (content, String[].class);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        } else {
            return null;
        }
    }
}