Java 实现汉字按照26个英文首字母分组排序(实际业务方法改造)

@ApiOperation(value = "26个首字母排序")
@RequestMapping(value = "alphabetical", method = RequestMethod.POST) 
public PmpResult  alphabetical (){
        //数据源查询数据库得出
        List<CustomCabinets2> alphabeticalGather = crmCustomersService.alphabetical();
        try {
            // 输出26个字母  TreeMap有序集合
            Map<String, Object> map = new TreeMap<>();
            for (int i = 1; i <= 26; i++) {
                //首字母
                String word = String.valueOf((char)(96 + i)).toUpperCase();
                // 循环找出 首字母一样的数据
                List<Object> letter = new ArrayList<>();
                //业务中查询出来的数据源 texts
                for (CustomCabinets2 customCabinets2 : alphabeticalGather) {
                    //调用工具类方法获取汉字串拼音
                    String zm = AlphabeticalUtils.getFullSpell(customCabinets2.getCabinetsTwoType()).substring(0, 1);
                    //将26个字母 和遍历出来接触的首字母比较相同添加到集合
                    if (word.equals(zm)) {
                        letter.add(customCabinets2);
                    }
                }
                map.put(word, letter);
            }
            return  PmpResult.success(map);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
工具类AlphabeticalUtils :  http://t.csdn.cn/pVm41
ServiceImpl
@Override
    public List<CustomCabinets2> alphabetical() {
        List<CustomCabinets2> alphabetical = crmCustomersDao.alphabetical();
        return alphabetical;
    }
 Service
List<CustomCabinets2> alphabetical();
Dao
 List<CustomCabinets2> alphabetical();
XML 
<select id="alphabetical"  resultType="com.lt.crm.entity.CustomCabinets2">
        SELECT
             CABINETS_TWO_CODE "cabinetsTwoCode",
             CABINETS_TWO_TYPE "cabinetsTwoType",
             STATE             "state"
          FROM CUSTOM_CABINETS2
</select>