Map

举例动态数据统计思路案例动态排序containsKey五117

如图所示

getCountData(request,paramMap);list

(e.get(status).equals(关闭))).collect(Collectors.toList());//

Map存储(region,num,num为相同region的加和MapString,Object

regionMap

Map存储(region,统计次数,统计次数为相同region的次数MapString,Object

countMap

String.valueOf(list.get(i).get(region));String

num

String.valueOf(list.get(i).get(processTime));//

regionMap包含region将region当作keyif(regionMap.containsKey(region))

{String

String.valueOf(regionMap.get(key));

从regionMap获取value值即地域对应的num值regionMap.put(region,

num);}//

countMap包含region将region当作keyif(countMap.containsKey(region))

{String

String.valueOf(countMap.get(key2));

从countMap获取value值即地域对应的统计次数值countMap.put(region,

1);}else

封装地域集合北京数值和IteratorMap.EntryString,

Object

regionMap.entrySet().iterator();while(it.hasNext()){Map.EntryString,

Object

String.valueOf(entry.getValue());regionList.add(key);numberList.add(value);}//

封装统计次数集合北京统计次数IteratorMap.EntryString,

Object

countMap.entrySet().iterator();while(it2.hasNext()){Map.EntryString,

Object

String.valueOf(entry.getValue());countList.add(value);}//

计算平均值封装集合avgListif(numberList.size()

countList.size())

Double.parseDouble(numberList.get(i));int

fenmu

Integer.valueOf(countList.get(i));if(fenmu

{Double

double类型的数据当分母的数值趋近0的时候返回来的数值就是一个NAN:if(Double.isNaN(x)){x

0.0;}avgList.add(String.valueOf(x));}}}//

resultList

根据地域集合与平均值集合封装新集合resultListif(regionList.size()

avgList.size())

HashMap();map.put(title,regionList.get(i));map.put(value,avgList.get(i).substring(0,avgList.get(i).indexOf(.)2));resultList.add(map);}}//排序value值大的Map往前排斌且插入新字段sortValue代表序列;Double[]

valueSort

Double[resultList.size()];String[]

titleSort

Double.parseDouble(String.valueOf(resultList.get(i).get(value)));titleSort[i]

String.valueOf(resultList.get(i).get(title));}//

数组排序BubblSortUtils.bubbleSortDescMultipleDouble(valueSort,titleSort);//

数组封装listFinalfor

String.valueOf(titleSort[i]);for

(int

String.valueOf(resultList.get(j).get(title));if(ch.equals(value)){listFinal.add(resultList.get(j));}}}//

listFinal中添加排序字段sortValueString[]

new

String[listFinal.size()];String[]

new

{listFinal.get(i).put(sortValue,listFinal.size()-i);A[i]

String.valueOf(listFinal.get(i).get(title));B[i]

String.valueOf(listFinal.get(i).get(value));}MapString,Object

restMap

HashMap();restMap.put(title,A);restMap.put(value,B);return

restMap;}

备注以上代码可简化处理写这么多是为了明确每个过程提供数据处理的拓展思路

代码修改位置

listFinal中添加排序字段sortValueString[]

new

String[listFinal.size()];String[]

new

{listFinal.get(i).put(sortValue,listFinal.size()-i);A[i]

String.valueOf(listFinal.get(i).get(title));B[i]

String.valueOf(listFinal.get(i).get(value));}MapString,Object

restMap

HashMap();restMap.put(title,A);restMap.put(value,B);return

restMap;Postman测试