Java数据封装成树形结构,多级
话不多说直接上菜
1，实体类
/**
* @ClassName SysTagConf
* @Description TODO
* @Author shenWB
* @Date 2019/5/31 10:12
* @Version 1.0
**/@Data
public class SysTagConf implements java.io.Serializable{
private String rowGuid; //唯一标识
private String name; //标签名称
private String opType; //授权类型 0全部 1目录清单 2实施清单 3办理项
private String useLevel; //使用层级 0不限 2省级 3地市级 4区县级
private float sort; //排序
private String parentGuid; //父节点标识
private String bakNote; //备注
private String createUId; //创建人ID
private String createUName; //创建人名称
private String createTime; //创建时间
private String updateUId; //更新人ID
private String updateUName; //更新人名称
private String updateTime; //更新时间
private String parentName; //父节点名称
private List childList;
}
2,业务模块serviceImpl
/**--------------------数据封装树结构代码---------------------------*/
@Override
public List tagConfTreeList(String deptId, List opType) {
SysDepartment sysDepartment = departmentDao.selectDepartmentByUserId(deptId);
String useLevel = null;//行使层级
if(sysDepartment != null){
if(sysDepartment.getUseLevel() != null && !"".equals(sysDepartment.getUseLevel())) {
useLevel = sysDepartment.getUseLevel();//行使层级赋值
}
}
List sysTagConfList = sysTagConfDao.tagConfTreeList(useLevel,opType); //查询所有数据
List rootList = new ArrayList<>(); //根节点对象存放到这里
List bodyList = new ArrayList<>(); //其他节点存放到这里，可以包含根节点
for (SysTagConf sysTagConf: sysTagConfList) {
if(sysTagConf != null) {
if (sysTagConf.getParentGuid().equals("")) {
rootList.add(sysTagConf);//所有父节点数据放进去
} else {
bodyList.add(sysTagConf); //其他节点数据也放进去
}
}
}
List stc = getTree(rootList,bodyList);//组装的树返给前端sb
return stc;
}
public List getTree(List rootList,List bodyList){
if(bodyList != null && !bodyList.isEmpty()){
//声明一个map，用来过滤已操作过的数据
Map map = Maps.newHashMapWithExpectedSize(bodyList.size());
rootList.forEach(beanTree -> getChild(beanTree,map,bodyList));
return rootList;
}
return null;
}
public void getChild(SysTagConf treeDto,Map map,List bodyList){
List childList = Lists.newArrayList();
bodyList.stream()
.filter(c -> !map.containsKey(c.getRowGuid()))
.filter(c ->c.getParentGuid().equals(treeDto.getRowGuid()))
.forEach(c ->{
map.put(c.getRowGuid(),c.getParentGuid());
getChild(c,map,bodyList);
childList.add(c);
});
treeDto.setChildList(childList);//子数据集
}
/**--------------------到此结束---------------------------*/ 3返回效果
{
"code": 0,
"message": "操作成功",
"data": [
{
"rowGuid": "1",
"name": "1",
"opType": "1",
"useLevel": "1",
"sort": 1,
"parentGuid": "",
"bakNote": "1",
"createUId": "1",
"createUName": "1",
"createTime": "1",
"updateUId": "1",
"updateUName": "1",
"updateTime": "1",
"parentName": null,
"childList": [
{
"rowGuid": "2",
"name": "2",
"opType": "1",
"useLevel": "1",
"sort": 2,
"parentGuid": "1",
"bakNote": "2",
"createUId": "2",
"createUName": "2",
"createTime": "2",
"updateUId": "2",
"updateUName": "2",
"updateTime": "2",
"parentName": null,
"childList": [
{
"rowGuid": "3",
"name": "3",
"opType": "1",
"useLevel": "1",
"sort": 3,
"parentGuid": "2",
"bakNote": "3",
"createUId": "3",
"createUName": "3",
"createTime": "3",
"updateUId": "3",
"updateUName": "3",
"updateTime": "3",
"parentName": null,
"childList": []
}
]
}
]
}
],
"messageId": null
}