通过mybatis实现单表内一对多的数据展示

1 public class ResultIndustry {
2     private String industryFirst;//一级行业
3     private List<String> industrySecondList;//二级行业

 1 <select id="getResultIndustryList" resultMap="resultIndustryMap">
 2         SELECT DISTINCT industry_first,industry_second
 3         FROM results
 4         WHERE industry_second IS NOT NULL
 5         AND industry_second != ""
 6     </select>
 7 
 8     <resultMap id="resultIndustryMap" type="com.gy_resc.common.bean.ResultIndustry">
 9         <result property="industryFirst" column="industry_first" jdbcType="VARCHAR"/>
10         <collection property="industrySecondList" ofType="java.lang.String">
11             <result property="industrySecond" column="industry_second" jdbcType="VARCHAR"/>
12         </collection>
13     </resultMap>