content: package org.jeecg.modules.system.util;
  
  import org.jeecg.common.constant.CommonConstant;
  import org.jeecg.common.util.RedisUtil;
  import org.jeecg.common.util.oConvertUtils;
  import org.jeecg.modules.system.entity.SysDepart;
  import org.jeecg.modules.system.model.DepartIdModel;
  import org.jeecg.modules.system.model.SysDepartTreeModel;
  import org.springframework.beans.factory.annotation.Autowired;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * <P>
   * 对应部门的表,处理并查找树级数据
   * <P>
   * 
   * @Author: Steve
   * @Date: 2019-01-22
   */
  public class FindsDepartsChildrenUtil {
  
  	//部门树信息-树结构
  	//private static List<SysDepartTreeModel> sysDepartTreeList = new ArrayList<SysDepartTreeModel>();
  	
  	//部门树id-树结构
      //private static List<DepartIdModel> idList = new ArrayList<>();
  
  
      /**
       * queryTreeList的子方法 ====1=====
       * 该方法是s将SysDepart类型的list集合转换成SysDepartTreeModel类型的集合
       */
      public static List<SysDepartTreeModel> wrapTreeDataToTreeList(List<SysDepart> recordList) {
          // 在该方法每请求一次,都要对全局list集合进行一次清理
          //idList.clear();
      	List<DepartIdModel> idList = new ArrayList<DepartIdModel>();
          List<SysDepartTreeModel> records = new ArrayList<>();
          for (int i = 0; i < recordList.size(); i++) {
              SysDepart depart = recordList.get(i);
              records.add(new SysDepartTreeModel(depart));
          }
          List<SysDepartTreeModel> tree = findChildren(records, idList);
          setEmptyChildrenAsNull(tree);
          return tree;
      }
  
      /**
       * 获取 DepartIdModel
       * @param recordList
       * @return
       */
      public static List<DepartIdModel> wrapTreeDataToDepartIdTreeList(List<SysDepart> recordList) {
          // 在该方法每请求一次,都要对全局list集合进行一次清理
          //idList.clear();
          List<DepartIdModel> idList = new ArrayList<DepartIdModel>();
          List<SysDepartTreeModel> records = new ArrayList<>();
          for (int i = 0; i < recordList.size(); i++) {
              SysDepart depart = recordList.get(i);
              records.add(new SysDepartTreeModel(depart));
          }
          findChildren(records, idList);
          return idList;
      }
  
      /**
       * queryTreeList的子方法 ====2=====
       * 该方法是找到并封装顶级父类的节点到TreeList集合
       */
      private static List<SysDepartTreeModel> findChildren(List<SysDepartTreeModel> recordList,
                                                           List<DepartIdModel> departIdList) {
  
          List<SysDepartTreeModel> treeList = new ArrayList<>();
          for (int i = 0; i < recordList.size(); i++) {
              SysDepartTreeModel branch = recordList.get(i);
              if (oConvertUtils.isEmpty(branch.getParentId())) {
                  treeList.add(branch);
                  DepartIdModel departIdModel = new DepartIdModel().convert(branch);
                  departIdList.add(departIdModel);
              }
          }
          getGrandChildren(treeList,recordList,departIdList);
          
          //idList = departIdList;
          return treeList;
      }
  
      /**
       * queryTreeList的子方法====3====
       *该方法是找到顶级父类下的所有子节点集合并封装到TreeList集合
       */
      private static void getGrandChildren(List<SysDepartTreeModel> treeList,List<SysDepartTreeModel> recordList,List<DepartIdModel> idList) {
  
          for (int i = 0; i < treeList.size(); i++) {
              SysDepartTreeModel model = treeList.get(i);
              DepartIdModel idModel = idList.get(i);
              for (int i1 = 0; i1 < recordList.size(); i1++) {
                  SysDepartTreeModel m = recordList.get(i1);
                  if (m.getParentId()!=null && m.getParentId().equals(model.getId())) {
                      model.getChildren().add(m);
                      DepartIdModel dim = new DepartIdModel().convert(m);
                      idModel.getChildren().add(dim);
                  }
              }
              getGrandChildren(treeList.get(i).getChildren(), recordList, idList.get(i).getChildren());
          }
  
      }
      
  
      /**
       * queryTreeList的子方法 ====4====
       * 该方法是将子节点为空的List集合设置为Null值
       */
      private static void setEmptyChildrenAsNull(List<SysDepartTreeModel> treeList) {
  
          for (int i = 0; i < treeList.size(); i++) {
              SysDepartTreeModel model = treeList.get(i);
              if (model.getChildren().size() == 0) {
                  model.setChildren(null);
                  model.setIsLeaf(true);
              }else{
                  setEmptyChildrenAsNull(model.getChildren());
                  model.setIsLeaf(false);
              }
          }
          // sysDepartTreeList = treeList;
      }
  }
  