Java数据封装树形结构代码实例

Java数据封装树形结构代码实例

这篇文章主要介绍了java数据封装树形结构代码实例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

1、实体类

@data

public class PublishServiceType implements Comparable{

/**

*

*/

private static final long serialVersionUID = -3572108154932898825L;

/*

* @see [code]

* @comment 类型标识

*/

private String code;

/*

* @see {createtime}

* @comment 创建时间

*/

private http://java.util.Date createtime;

/*

* @see {defaultmanual}

* @comment 服务类型默认使用手册

*/

private String defaultmanual;

/*

* @see {description}

* @comment 服务类型描述

*/

private String description;

/*

* @see {id}

* @comment 主键

*/

private String id;

/*

* @see {isdelete}

* @comment 是否可以删除

*/

private Integer isdelete;

/*

* @see {lastmodifytime}

* @comment 最近修改时间

*/

private java.util.Date lastmodifytime;

/*

* @see {name}

* @comment 服务类型名称

*/

private String name;

/*

* @see {parentid}

* @comment 服务类型父节点

*/

private String parentid;

/**

* 排序

*/

private Integer sort;

private Listchildren;

}

2、数据封装

@Override

public List findList(String name) {

Listlist = publishServiceTypeMapper.findByName(name);

if (JudgeUtil.isEmpty(list)){

return null;

}

//父子级组装

return parentAndChildren(list);

}

private ListparentAndChildren(List list){

//最顶层根节点

ListrootList = new ArrayList<>();

//非最顶层根节点

ListbodyList = new ArrayList<>();

for (PublishServiceType publishServiceType : list) {

if (StringUtils.isBlank(publishServiceType.getParentid())){

rootList.add(publishServiceType);

}else{

bodyList.add(publishServiceType);

}

}

return getTree(rootList,bodyList);

}

public List getTree(ListrootList, ListbodyList){

if (!JudgeUtil.isEmpty(bodyList)){

//声明一个map，用来过滤已操作过的数据

Map map = new HashMap<>(bodyList.size());

rootList.forEach(parent->getChild(parent,bodyList,map));

return rootList;

}else{

return rootList;

}

}

private void getChild(PublishServiceType parent,ListbodyList, Map map){

ListchildList = new ArrayList<>();

bodyList.stream().filter(c->!map.containsKey(c.getId()))

.filter(c->c.getParentid().equals(parent.getId()))

.forEach(c->{

map.put(c.getId(),c.getParentid());

getChild(c,bodyList,map);

childList.add(c);

});

parent.setChildren(childList);

}

3、结果

{

"code": 20000,

"message": "成功",

"data": [

{

"code": null,

"createtime": null,

"defaultmanual": null,

"description": null,

"id": "dc1d70b9eb7b4df3bbe8dcc6a93cbd57",

"isdelete": -1,

"lastmodifytime": null,

"name": "基础服务",

"parentid": "",

"sort": 1,

"children": [

{

"code": null,

"createtime": null,

"defaultmanual": null,

"description": null,

"id": "b1779671ef1b45e0a9a8a1edbff03f1e",

"isdelete": -1,

"lastmodifytime": null,

"name": "数据源服务",

"parentid": "dc1d70b9eb7b4df3bbe8dcc6a93cbd57",

"sort": 2,

"children": [

{

"code": null,

"createtime": null,

"defaultmanual": null,

"description": null,

"id": "2a38a8254ec348e9b54c9bf4622f23db",

"isdelete": 1,

"lastmodifytime": null,

"name": "测试添加数据库服务2",

"parentid": "b1779671ef1b45e0a9a8a1edbff03f1e",

"sort": null,

"children": []

}

]

},

{

"code": null,

"createtime": null,

"defaultmanual": null,

"description": null,

"id": "d4f3b047dc2d467a9b404ded8acf4673",

"isdelete": 1,

"lastmodifytime": null,

"name": "text_lsa",

"parentid": "dc1d70b9eb7b4df3bbe8dcc6a93cbd57",

"sort": null,

"children": []

}

]

},

{

"code": null,

"createtime": null,

"defaultmanual": null,

"description": null,

"id": "af1b4a4d2f074fa19e1dae0a5540a5bf",

"isdelete": 1,

"lastmodifytime": null,

"name": "测试添加1",

"parentid": "",

"sort": null,

"children": []

},

{

"code": null,

"createtime": null,

"defaultmanual": null,

"description": null,

"id": "62e15d859a224126884888a55df355a7",

"isdelete": 1,

"lastmodifytime": null,

"name": "测试添加2",

"parentid": "",

"sort": null,

"children": []

}

]

}

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