java 树形结构递归

查出所有的节点,根据父节点找到一级节点填充数据:

 1 @PostMapping(value = "/TRACK140101")
 2     public R TRACK140101(@RequestBody TRACK140101Request param) {
 3         String inputParam = "";
 4         try {
 5             inputParam = objectMapper.writeValueAsString(param);
 6             //查询能看到的节点
 7             List<String> dpIds = remoteCommonService.queryDimensions(param.getJobNo(), DimensionIdEnum.DIMENSIONID.getValue());
 8             //查询所有组织机构
 9             List<CommonDataDimensionVal> commonDataDimensionVals = commonDataDimensionValService.findAll(dpIds);
10             //一级节点
11             List<TRACK140101Response> response = new ArrayList<>();
12             List<CommonDataDimensionVal> CommonDataDimensionValList = commonDataDimensionVals.stream().filter(one -> one.getParentId().equals(DPID)).collect(Collectors.toList());
13             //遍历一级机构
14             CommonDataDimensionValList.forEach(commonDataDimens -> {
15                 TRACK140101Response trackReponse = new TRACK140101Response();
16                 trackReponse.setId(commonDataDimens.getDpId());
17                 trackReponse.setLabel(commonDataDimens.getDpName());
18                 //调用递归体
19                 trackReponse.setChildren(getchild(commonDataDimens, commonDataDimensionVals));
20                 response.add(trackReponse);
21             });
22 
23             return R.ok(response);
24         } catch (Exception e) {
25             log.error("【TRACK140101-组织机构树查询 入参 】：" + inputParam);
26             log.error("【TRACK140101-组织机构树查询 】", e);
27             return R.error();
28         }
29     }

根据父节点id查找对应的子节点信息填充  递归调用

 /**
     * 递归体
     *
     * @return
     */
    public List<TRACK140101Response> getchild(CommonDataDimensionVal commonDataDimens, List<CommonDataDimensionVal> commonDataDimensionVals) {
        //筛选出下一级的机构信息
        List<CommonDataDimensionVal> CommonDataDimensionValList = commonDataDimensionVals.stream().filter(one -> one.getParentId().equals(commonDataDimens.getDpId())).collect(Collectors.toList());
        List<TRACK140101Response> response = new ArrayList<>();
        if (StringUtils.isNotEmpty(CommonDataDimensionValList)) {
            //遍历下一级的机构信息，并封装返回参数
            CommonDataDimensionValList.forEach(childCommonDataDimens -> {
                TRACK140101Response trackReponse = new TRACK140101Response();
                trackReponse.setId(childCommonDataDimens.getDpId());
                trackReponse.setLabel(childCommonDataDimens.getDpName());
                //调用递归体
                trackReponse.setChildren(getchild(childCommonDataDimens, commonDataDimensionVals));
                response.add(trackReponse);
            });
        }
        return response;
    }

树形结构对应的实体类:

@Data
public class TRACK140101Response {
    /**
     * 机构id
     */
    private String id;
    /**
     * 机构名称
     */
    private String label;
    /**
     * 子节点
     */
    private List<TRACK140101Response> children;

}

以上.

posted @ 2020-04-23 15:28  纷纷暮雪春风来  阅读(3062)  评论(2)  编辑  收藏  举报