java中将list转为树形结构的数据
/**
*pid 顶级节点的parentId
*/
public static List<DepartmentVO> getTreeData(List<DepartmentVO> list,Long pid){
List<DepartmentVO> result = new ArrayList<DepartmentVO>();
List<DepartmentVO> temp = new ArrayList<DepartmentVO>();
for(DepartmentVO entity : list){
if(entity.getParentId().equals(pid)){
DepartmentVO departmentVO = new DepartmentVO();
BeanCopyUtils.copyProperties(entity,departmentVO);
temp = getTreeData(list,entity.getDepartmentId());
if(temp.size() > 0){
departmentVO.setChildren(temp);
}
result.add(departmentVO);
}
}
return result;
}