Java数据封装树形结构代码实例

2023-08-03 02:16:04 68

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
publicclassPublishServiceTypeimplementsComparable{


/**
*
*/
privatestaticfinallongserialVersionUID=-3572108154932898825L;


/*
*@see[code]
*@comment类型标识
*/
privateStringcode;
/*
*@see{createtime}
*@comment创建时间
*/
privatejava.util.Datecreatetime;
/*
*@see{defaultmanual}
*@comment服务类型默认使用手册
*/
privateStringdefaultmanual;
/*
*@see{description}
*@comment服务类型描述
*/
privateStringdescription;
/*
*@see{id}
*@comment主键
*/
privateStringid;
/*
*@see{isdelete}
*@comment是否可以删除
*/
privateIntegerisdelete;
/*
*@see{lastmodifytime}
*@comment最近修改时间
*/
privatejava.util.Datelastmodifytime;
/*
*@see{name}
*@comment服务类型名称
*/
privateStringname;
/*
*@see{parentid}
*@comment服务类型父节点
*/
privateStringparentid;

/**
*排序
*/
privateIntegersort;

privateListchildren;
}

2、数据封装

@Override
publicListfindList(Stringname){
Listlist=publishServiceTypeMapper.findByName(name);
if(JudgeUtil.isEmpty(list)){
returnnull;
}
//父子级组装
returnparentAndChildren(list);
}
privateListparentAndChildren(Listlist){

//最顶层根节点
ListrootList=newArrayList<>();
//非最顶层根节点
ListbodyList=newArrayList<>();
for(PublishServiceTypepublishServiceType:list){
if(StringUtils.isBlank(publishServiceType.getParentid())){
rootList.add(publishServiceType);
}else{
bodyList.add(publishServiceType);
}
}
returngetTree(rootList,bodyList);
}

publicListgetTree(ListrootList,ListbodyList){
if(!JudgeUtil.isEmpty(bodyList)){
//声明一个map，用来过滤已操作过的数据
Mapmap=newHashMap<>(bodyList.size());
rootList.forEach(parent->getChild(parent,bodyList,map));
returnrootList;
}else{
returnrootList;
}
}

privatevoidgetChild(PublishServiceTypeparent,ListbodyList,Mapmap){
ListchildList=newArrayList<>();
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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Java数据封装树形结构代码实例

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