1.定义一个转换器类，继承TypeHandler

@MappedJdbcTypes(JdbcType.VARCHAR)
@MappedTypes(List.class)
public class ListToVarcharTypeHandler implements TypeHandler<List<String>> {
    @Override
    public void setParameter(PreparedStatement preparedStatement, int i, List<String> strings, JdbcType jdbcType) throws SQLException {
        StringBuffer sb = new StringBuffer();
        for (int j = 0; j < strings.size(); j++) {
            if (j == strings.size() - 1) {
                sb.append(strings.get(j));
            } else {
                sb.append(strings.get(j)).append(",");
            }
        }
        preparedStatement.setString(i, sb.toString());

    }

    @Override
    public List<String> getResult(ResultSet resultSet, String s) throws SQLException {
        String resultString = resultSet.getString(s);
        if (StringUtils.isNotEmpty(resultString)) {
            return Arrays.asList(resultString.split(","));
        }
        return null;
    }

    @Override
    public List<String> getResult(ResultSet resultSet, int i) throws SQLException {
        String resultString = resultSet.getString(i);
        if (StringUtils.isNotEmpty(resultString)) {
            return Arrays.asList(resultString.split(","));
        }
        return null;
    }

    @Override
    public List<String> getResult(CallableStatement callableStatement, int i) throws SQLException {
        String resultString = callableStatement.getString(i);
        if (StringUtils.isNotEmpty(resultString)) {
            return Arrays.asList(resultString.split(","));
        }
        return null;
    }
}

2.在实体类的对应字段上加上Tablefield

@TableField(value="questionnaire",typeHandler="com.rainon.dataplat.service.BO.commen.ListToVarcharTypeHandler")
    private List<String> questionnaire;

如果版本不支持，则需要在注解里添加el包头

@TableField(el="questionnaire,typeHandler=com.rainon.dataplat.service.BO.commen.ListToVarcharTypeHandler")
    private List<String> questionnaire;

3.在对应Mapping里的resultMap里添加

<result column="questionnaire" jdbcType="VARCHAR" property="questionnaire"  typeHandler="com.rainon.dataplat.service.BO.commen.ListToVarcharTypeHandler" />

记得对应的添加查找语句里也要加上resultMap

<select id="getAllInquiryBydate" resultMap="BaseResultMap">