java工具封装树形对象,常用于菜单 json树逆向生成list集合

package com.jiuding.adminuser.util;import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.jiuding.adminuser.vo.TPermissionVo;import java.util.List;
import java.util.Map;public class TreeToolUtils {/**TPermissionVo 是我的javaBen,请换成自己的那个树节点对象对象中的属性主要需要的是自己的主键:private String id;//父级的主键private String parentId;//装子集的list,因为表示自关联所以list对象也是自己private List<TPermissionVo> list;*/
//根节点
private List<TPermissionVo> rootList; //根节点对象集合存放到这里 如:表中所有父节点都是0的    private List<TPermissionVo> bodyList; //其他节点存放到这里，可以包含根节点public TreeToolUtils(List<TPermissionVo> rootList, List<TPermissionVo> bodyList) {this.rootList = rootList;this.bodyList = bodyList;}public TreeToolUtils() {}public List<TPermissionVo> getTree(){   //调用的方法入口if(bodyList != null && !bodyList.isEmpty()){//声明一个map，用来过滤已操作过的数据Map<String,String> map = Maps.newHashMapWithExpectedSize(bodyList.size());rootList.forEach(beanTree -> getChild(beanTree,map));return rootList;}return null;}public void getChild(TPermissionVo TPermissionVo,Map<String,String> map){List<TPermissionVo> childList = Lists.newArrayList();bodyList.stream().filter(c -> !map.containsKey(c.getId())).filter(c ->c.getParentId().equals(TPermissionVo.getId())).forEach(c ->{map.put(c.getId(),c.getParentId());getChild(c,map);childList.add(c);});TPermissionVo.setList(childList);}
}

//使用: 创建一个对象
//list是装所有父节点的
//list2是装所有子节点的TreeToolUtils utils =  new TreeToolUtils(list,list2);List<TPermissionVo> result =  utils.getTree();
//result 就是返回的 树集合[{"id": "0d311a16aa71461dadfc62f0d27682be","createBy": "10296c662e8a4628a6b5ac65a1609ba9","createTime": "2019-10-08 17:11:32","delFlag": null,"updateBy": null,"updateTime": null,"name": "关系分析","parentId": "0","sortOrder": 1,"module": 1,"style": "","icon": "","path": "","status": 0,"url": "guanxifenxi","list": [{"id": "c8e4be1cae654de6bd6ceb1225d6fcc0","createBy": "xxx","createTime": "2019-10-18 15:30:33","delFlag": null,"updateBy": null,"updateTime": null,"name": "我是关系分析二级级菜单","parentId": "0d311a16aa71461dadfc62f0d27682be","sortOrder": 9999,"module": 1,"style": "","icon": "","path": "","status": 0,"url": "/queryDepartmentsssss","list": [{"id": "49abcca609a6444898adbb5746ab27bf","createBy": "xxx","createTime": "2019-10-18 15:30:51","delFlag": null,"updateBy": null,"updateTime": null,"name": "我是关系分析三级级菜单","parentId": "c8e4be1cae654de6bd6ceb1225d6fcc0","sortOrder": 9999,"module": 1,"style": "","icon": "","path": "","status": 0,"url": "/queryDepartm","list": [{"id": "9287f6a6b15b490f9126e77563050269","createBy": "xxx","createTime": "2019-10-18 15:42:49","delFlag": null,"updateBy": null,"updateTime": null,"name": "我是关系分析四级级菜单","parentId": "49abcca609a6444898adbb5746ab27bf","sortOrder": 9999,"module": 1,"style": "","icon": "","path": "","status": 0,"url": "/queryDepartm4","list": [],"bool": false}],"bool": false},{"id": "cd25ab0d7dc9460d8c761b3c3176169b","createBy": "xxx","createTime": "2019-10-18 15:31:12","delFlag": null,"updateBy": null,"updateTime": null,"name": "我是关系分析三级级菜单2","parentId": "c8e4be1cae654de6bd6ceb1225d6fcc0","sortOrder": 9999,"module": 1,"style": "","icon": "","path": "","status": 0,"url": "/queryDepartm2","list": [],"bool": false}],"bool": false}],"bool": true},{"id": "20f9d7d9ca9b40ecb585dca8446d7417","createBy": "10296c662e8a4628a6b5ac65a1609ba9","createTime": "2019-10-08 17:12:22","delFlag": null,"updateBy": null,"updateTime": null,"name": "联案分析","parentId": "0","sortOrder": 3,"module": 1,"style": "","icon": "","path": "","status": 0,"url": "textr","list": [],"bool": true}]

json树逆向生成list集合

//    装子节点集合private static List<JSONObject> childMenu=new ArrayList<JSONObject>();private List<JSONObject> adasd(JSONObject object,String pid){if (!object.isEmpty()){JSONObject data = object.getJSONObject("data");data.put("pid",pid);String id = data.getString("id");childMenu.add(data);
//            System.err.println("data的数据:"+data);JSONArray children = object.getJSONArray("children");
//            System.err.println("节点的数据:"+children);if (!children.isEmpty()&&children.size()>0){for (Object child : children){adasd((JSONObject)child,id);}}}return childMenu;}

数据:

{"root": {"data": {"id": "c1lg9acr6wo0","created": 1585295229212,"text": "中心主题"},"children": [{"data": {"id": "c1lh5vxprfk0","created": 1585297783845,"text": "分支1主题"},"children": [{"data": {"id": "c1lh621gnuw0","created": 1585297797132,"text": "分支1的分支1主题"},"children": [{"data": {"id": "c1lh66h48w00","created": 1585297806786,"text": "分支1的分支1的分支1主题"},"children": []}]}, {"data": {"id": "c1lh6fzwdm80","created": 1585297827513,"text": "分支1的分支2主题"},"children": []}]}, {"data": {"id": "c1lh6l0hzh40","created": 1585297838433,"text": "分支3主题"},"children": [{"data": {"id": "c1lh712oe800","created": 1585297873393,"text": "分支3的分支主题","layout_right_offset": {"x": 38,"y": 22}},"children": []}]}, {"data": {"id": "c1lh6tu6qcg0","created": 1585297857642,"text": "分支2主题"},"children": []}]},"template": "default","theme": "fresh-blue","version": "1.4.43"
}

使用 obj为上面的json字符串childMenu.clear();System.err.println(obj);List<JSONObject> adasd=new ArrayList<>();if (obj!=null){JSONObject root = obj.getJSONObject("root");//处理数据adasd = adasd(root,"root");}

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java工具封装树形对象,常用于菜单 json树逆向生成list集合

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