語言 Java
實現(xiàn)內(nèi)容是一列帶日期的數(shù)據(jù)分組成一個月一組的形式（提前要求是數(shù)據(jù)得按時間從小到大排序）
- 數(shù)據(jù)結(jié)構(gòu)
# time 是Date日期類型
[
{
"time": "2019-01-01",
"title": "這是20190101"
},
{
"time": "2019-01-02",
"title": "這是20190102"
},
{
"time": "2019-02-01",
"title": "這是20190201"
},
{
"time": "2019-03-01",
"title": "這是20190301"
},
{
"time": "2019-03-02",
"title": "這是20190302"
},
{
"time": "2019-03-03",
"title": "這是20190303"
}
]
- 方法
List<Map<String, Object>> result= Lists.newLinkedList();
SimpleDateFormat sf=new SimpleDateFormat("yyyy年MM月");
for (int i = 0; i < list.size(); i++) { //list 格式 ： List<Data> Data就是上面json格式
Map<String,Object> params= Maps.newHashMap();
String time=sf.format(list.get(i).getTime());
List<Data> children= Lists.newLinkedList();
for (int j = i; j < list.size(); j++) {
Data data=list.get(j);
if (time.equals(sf.format(data.getTime()))){
children.add(data);
}else{
break;
}
i=j;
}
params.put("time",time );
params.put("data",children);
result.add(params);
}
return result;
- 效果
[
{
"data": [
{
"time": "2019-01-01",
"title": "這是20190101"
},
{
"time": "2019-01-02",
"title": "這是20190102"
}
],
"time": "2019年01月"
},
{
"data": [
{
"time": "2019-02-01",
"title": "這是20190201"
}
],
"time": "2019年02月"
},
{
"data": [
{
"time": "2019-03-01",
"title": "這是20190301"
},
{
"time": "2019-03-02",
"title": "這是20190302"
},
{
"time": "2019-03-03",
"title": "這是20190303"
}
],
"time": "2019年03月"
}
]
