java对list的常用操作（排序，分组，去重）

1. public static ArrayList<OrganizationInfoBO> removeDuplicteUsers(ArrayList<OrganizationInfoBO> listOrganizationInfoBo) {
2. Set<OrganizationInfoBO> setBo = new TreeSet<OrganizationInfoBO>(new Comparator<OrganizationInfoBO>() {
3. @Override
4. public int compare(OrganizationInfoBO o1, OrganizationInfoBO o2) {
5. return o1.getId().compareTo(o2.getId());
6.             }
7.         });
8.         setBo.addAll(listOrganizationInfoBo);
9. return new ArrayList<OrganizationInfoBO>(setBo);
10.     }

1. Map<String, List<AttendRulesInfoBO>> group = resultBo(list对象).
2. stream().collect(Collectors.groupingBy
3. (AttendRulesInfoBO（list中VO）::getLateClass（VO中get方法）));

1. //按照条码类别倒序，条码编码正序排列
2. Collections.sort(result, new Comparator<BarcodeManageVo>() {
3. @Override
4. public int compare(BarcodeManageVo bo1, BarcodeManageVo bo2) {
5. return bo2.getBatchCode().compareTo(bo1.getBatchCode());
6. //String的逆序排列
7.                 }
8.             });