springboot3.0.4RBAC(2)对接菜单页

新建控制器返回菜单列表，

这里会用到树形结构节点类和构建工具类

public class TreeNode implements Serializable {
    private static final long serialVersionUID = 1L;
    /**
     * 主键
     */
    private Long id;
    /**
     * 上级ID
     */
    private Long pid;
    /**
     * 子节点列表
     */
    private List children = new ArrayList<>();

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Long getPid() {
        return pid;
    }

    public void setPid(Long pid) {
        this.pid = pid;
    }

    public List getChildren() {
        return children;
    }

    public void setChildren(List children) {
        this.children = children;
    }
}

public class TreeUtils {

    /**
     * 根据pid，构建树节点
     */
    public static  List build(List treeNodes, Long pid) {
        //pid不能为空
        AssertUtils.isNull(pid, "pid");

        List treeList = new ArrayList<>();
        for(T treeNode : treeNodes) {
            if (pid.equals(treeNode.getPid())) {
                treeList.add(findChildren(treeNodes, treeNode));
            }
        }

        return treeList;
    }

    /**
     * 查找子节点
     */
    private static  T findChildren(List treeNodes, T rootNode) {
        for(T treeNode : treeNodes) {
            if(rootNode.getId().equals(treeNode.getPid())) {
                rootNode.getChildren().add(findChildren(treeNodes, treeNode));
            }
        }
        return rootNode;
    }

    /**
     * 构建树节点
     */
    public static  List build(List treeNodes) {
        List result = new ArrayList<>();

        //list转map
        Map nodeMap = new LinkedHashMap<>(treeNodes.size());
        for(T treeNode : treeNodes){
            nodeMap.put(treeNode.getId(), treeNode);
        }

        for(T node : nodeMap.values()) {
            T parent = nodeMap.get(node.getPid());
            if(parent != null && !(node.getId().equals(parent.getId()))){
                parent.getChildren().add(node);
                continue;
            }

            result.add(node);
        }

        return result;
    }

}

编写vue代码，该代码已经提交到git

菜单页目前可以展开

其中前端树形结构用的是el-table里面的展开功能