java组装部门树

用到了组装部门树，给的内容是五花八门，关键时刻靠自己

直接上代码

亲测有效

public List<QwDept> getQwDeptTree() {
        List<QwDept> menus = qwDeptMapper.selectQwDeptList(new QwDept());
      
        List<QwDept> TreeMenu = menus.stream().filter(m -> m.getParentid() == 0).map(
                (m) -> {
                    m.setChildren(getChildrens(m,menus));
              
                    return m;
                }
        ).collect(Collectors.toList());
        return TreeMenu;
    }

private List<QwDept> getChildrens(QwDept root, List<QwDept> all) {

        List<QwDept> children = all.stream().filter(m -> {
            return Objects.equals(m.getParentid(), root.getId());
        }).map(
                (m) -> {
                    m.setChildren(getChildrens(m, all));
                    return m;
                }
        ).collect(Collectors.toList());
        return children;
    }