使用Android中的列表值对HashMap进行排序(map)
我已经使用json响应创建了一个HashMap，我希望按月使用它的数据组。
我的json
[
{
"type":"CLAIMS PAID",
"category":"01. Less than 0",
"month":11,
"year":2020,
"count":173
},
{
"type":"CLAIMS PAID",
"category":"02. 1-5",
"month":11,
"year":2020,
"count":445
},
{
"type":"CLAIMS PAID",
"category":"03. 6-10",
"month":11,
"year":2020,
"count":362
},
{
"type":"CLAIMS PAID",
"category":"04. 11-15",
"month":11,
"year":2020,
"count":241
},
{
"type":"CLAIMS PAID",
"category":"05. 16-20",
"month":11,
"year":2020,
"count":130
},
{
"type":"CLAIMS PAID",
"category":"06. 21-25",
"month":11,
"year":2020,
"count":115
},
{
"type":"CLAIMS PAID",
"category":"07. 26-30",
"month":11,
"year":2020,
"count":66
},
{
"type":"CLAIMS PAID",
"category":"08. 31-35",
"month":11,
"year":2020,
"count":32
},
{
"type":"CLAIMS PAID",
"category":"09. More than 35",
"month":11,
"year":2020,
"count":251
},
{
"type":"CLAIMS PAID",
"category":"01. Less than 0",
"month":12,
"year":2020,
"count":257
},
{
"type":"CLAIMS PAID",
"category":"02. 1-5",
"month":12,
"year":2020,
"count":726
},
{
"type":"CLAIMS PAID",
"category":"03. 6-10",
"month":12,
"year":2020,
"count":722
},
{
"type":"CLAIMS PAID",
"category":"04. 11-15",
"month":12,
"year":2020,
"count":378
},
{
"type":"CLAIMS PAID",
"category":"05. 16-20",
"month":12,
"year":2020,
"count":207
},
{
"type":"CLAIMS PAID",
"category":"06. 21-25",
"month":12,
"year":2020,
"count":151
},
{
"type":"CLAIMS PAID",
"category":"07. 26-30",
"month":12,
"year":2020,
"count":94
},
{
"type":"CLAIMS PAID",
"category":"08. 31-35",
"month":12,
"year":2020,
"count":56
},
{
"type":"CLAIMS PAID",
"category":"09. More than 35",
"month":12,
"year":2020,
"count":351
},
{
"type":"CLAIMS PAID",
"category":"01. Less than 0",
"month":1,
"year":2021,
"count":254
},
{
"type":"CLAIMS PAID",
"category":"02. 1-5",
"month":1,
"year":2021,
"count":693
},
{
"type":"CLAIMS PAID",
"category":"03. 6-10",
"month":1,
"year":2021,
"count":538
},
{
"type":"CLAIMS PAID",
"category":"04. 11-15",
"month":1,
"year":2021,
"count":287
},
{
"type":"CLAIMS PAID",
"category":"05. 16-20",
"month":1,
"year":2021,
"count":194
},
{
"type":"CLAIMS PAID",
"category":"06. 21-25",
"month":1,
"year":2021,
"count":144
},
{
"type":"CLAIMS PAID",
"category":"07. 26-30",
"month":1,
"year":2021,
"count":110
},
{
"type":"CLAIMS PAID",
"category":"08. 31-35",
"month":1,
"year":2021,
"count":73
},
{
"type":"CLAIMS PAID",
"category":"09. More than 35",
"month":1,
"year":2021,
"count":372
},
{
"type":"CLAIMS PAID",
"category":"01. Less than 0",
"month":2,
"year":2021,
"count":225
},
{
"type":"CLAIMS PAID",
"category":"02. 1-5",
"month":2,
"year":2021,
"count":960
},
{
"type":"CLAIMS PAID",
"category":"03. 6-10",
"month":2,
"year":2021,
"count":733
},
{
"type":"CLAIMS PAID",
"category":"04. 11-15",
"month":2,
"year":2021,
"count":360
},
{
"type":"CLAIMS PAID",
"category":"05. 16-20",
"month":2,
"year":2021,
"count":200
},
{
"type":"CLAIMS PAID",
"category":"06. 21-25",
"month":2,
"year":2021,
"count":145
},
{
"type":"CLAIMS PAID",
"category":"07. 26-30",
"month":2,
"year":2021,
"count":107
},
{
"type":"CLAIMS PAID",
"category":"08. 31-35",
"month":2,
"year":2021,
"count":51
},
{
"type":"CLAIMS PAID",
"category":"09. More than 35",
"month":2,
"year":2021,
"count":271
}
]
对象类
public class Item{
private String type;
private String category;
private int month;
private int year;
private String monthName;
private String count;
}
JSONArray resArray = new JSONArray(jsonresponse);
for (int i = 0; i < resArray.length(); i++) {
JSONObject jo = resArray.getJSONObject(i);
Item ariData = new Item();
ariData.setType(jo.getString("type"));
ariData.setCategory(jo.getString("category"));
ariData.setYear(jo.getInt("year"));
ariData.setMonth(jo.getInt("month"));
ariData.setMonthName(getMonthFullName(jo.getInt("month")));
ariData.setCount(jo.getString("count"));
ariList.add(ariData);
}
Map<Integer, List<Item>> objectsPer = ariList.stream()
.collect(Collectors.groupingBy(Item::getMonth));
public class Item{
private String type;
private String category;
private String count;
private int total;
private YearMonth yearMonth;
}
JSONArray resArray = new JSONArray(response);
for (int i = 0; i < resArray.length(); i++) {
JSONObject jo = resArray.getJSONObject(i);
Item ariData = new Item();
ariData.setType(jo.getString("type"));
ariData.setCategory(jo.getString("category"));
ariData.setCount(jo.getString("count"));
YearMonth yMonth = YearMonth.of(jo.getInt("year"), jo.getInt("month"));
ariData.setYearMonth(yMonth);
ariList.add(ariData);
}
Map<YearMonth, List<Item>> objectsPer = ariList.stream()
.collect(Collectors.groupingBy(Item::getYearMonth));
共有1个答案
正如deHaar所评论的，您应该使用java.time.YearMonts类，而不是单独的int字段来表示year和Month。并且不需要存储月份名称，因为可以通过调用YearMonth#GetMonth和month#GetDisplayName来动态确定月份名称。
重新定义您的类，使用更少的字段：字符串类型、字符串类别、YearMonth YearMonth和int count。
(count不应该是整数而不是string吗？）
public record Item ( String type, String category, YearMonth yearMonth, int count ) {}
在映射中收集项对象。使用可导航地图和可导航集保持按YearMonth排序。
也许可以使用Treemap和Treeset作为实现的选择。在构造Treeset对象时，传递comparator来组织排序。
NavigableMap< YearMonth , NavigableSet< Item > > = …
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