mybatis自定義轉換器

public interface BasicCodeEnum {
    /**
     * 獲取枚舉值
     *
     * @return 枚舉值
     */
    Integer getValue();
}

@MappedTypes(value = {Status.class})
@MappedJdbcTypes(JdbcType.TINYINT)
public class MyConvertTypeHandler<E extends Enum<E> & BasicCodeEnum> extends BaseTypeHandler<BasicCodeEnum> {
    private Class<E> type;

    public MyConvertTypeHandler(Class<E> type) {
        if (type == null) {
            throw new IllegalArgumentException("Type argument cannot be null");
        }
        this.type = type;
    }


    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, BasicCodeEnum parameter, JdbcType jdbcType)
            throws SQLException {
        ps.setInt(i, parameter.getValue());
    }

    @Override
    public E getNullableResult(ResultSet rs, String columnName) throws SQLException {
        int code = rs.getInt(columnName);
        return rs.wasNull() ? null : codeOf(code);
    }

    @Override
    public E getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        int code = rs.getInt(columnIndex);
        return rs.wasNull() ? null : codeOf(code);
    }

    @Override
    public E getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        int code = cs.getInt(columnIndex);
        return cs.wasNull() ? null : codeOf(code);
    }

    private E codeOf(int code){
        try {
            return codeOf(type, code);
        } catch (Exception ex) {
            throw new IllegalArgumentException("Cannot convert " + code + " to " + type.getSimpleName() + " by code value.", ex);
        }
    }
    public static <E extends Enum<?> & BasicCodeEnum> E codeOf(Class<E> enumClass, int code) {
        E[] enumConstants = enumClass.getEnumConstants();
        for (E e : enumConstants) {
            if (e.getValue() == code)
                return e;
        }
        return null;
    }
}