先定义一个Tree对象，不同的Response去继承这个对象

import java.util.ArrayList;
import java.util.List;

public class Tree {
    protected List children = new ArrayList();
    protected List parent = new ArrayList();

    public Tree() {
    }

    protected Object getTreeId() {
        return null;
    }

    protected Object getTreeParentId() {
        return null;
    }

    public List getParentList() {
        return this.parent;
    }

    public List getChildren() {
        return this.children;
    }

    protected boolean topParentId() {
        return "0".equals(this.getTreeParentId());
    }
}

封装通用的树结构工具类

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.functio