电子商务网站建设与维护课程总结,阿里云网站备案好了 怎么建站,周口网站建设专家,腾讯广告推广平台需求#xff1a;前端根据后端的返回数据#xff1a;画统计图#xff1b;
说明#xff1a; 1.X轴为地域#xff0c;Y轴为地域出现的次数#xff1b; 2. 动态展示#xff08;有地域展示#xff0c;没有不展示#xff0c;且高低排序#xff09; Demo案例#xff1a;
…需求前端根据后端的返回数据画统计图
说明 1.X轴为地域Y轴为地域出现的次数 2. 动态展示有地域展示没有不展示且高低排序 Demo案例
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;public class day22 {public static void main(String[] args) {ListMapString,Object list new ArrayList();MapString,Object map1 new HashMap();map1.put(region,西安);map1.put(num,1.0);MapString,Object map2 new HashMap();map2.put(region,上海);map2.put(num,2.0);MapString,Object map3 new HashMap();map3.put(region,北京);map3.put(num,3.0);MapString,Object map4 new HashMap();map4.put(region,西安);map4.put(num,1.5);MapString,Object map5 new HashMap();map5.put(region,西安);map5.put(num,2.5);MapString,Object map6 new HashMap();map6.put(region,北京);map6.put(num,4.0);MapString,Object map7 new HashMap();map7.put(region,成都);map7.put(num,1.0);MapString,Object map8 new HashMap();map8.put(region,上海);map8.put(num,2.0);MapString,Object map9 new HashMap();map9.put(region,上海);map9.put(num,2.5);MapString,Object map10 new HashMap();map10.put(region,上海);map10.put(num,2.0);MapString,Object map11 new HashMap();map11.put(region,长沙);map11.put(num,2.0);MapString,Object map12 new HashMap();map12.put(region,苏州);map12.put(num,2.0);MapString,Object map13 new HashMap();map13.put(region,江西);map13.put(num,2.0);MapString,Object map14 new HashMap();map14.put(region,长沙);map14.put(num,2.0);MapString,Object map15 new HashMap();map15.put(region,苏州);map15.put(num,2.0);list.add(map1);list.add(map2);list.add(map3);list.add(map4);list.add(map5);list.add(map6);list.add(map7);list.add(map8);list.add(map9);list.add(map10);list.add(map11);list.add(map12);list.add(map13);list.add(map14);list.add(map15);// Set获取数组中的所有数据去重SetString hashSet new HashSet();for (int i 0; i list.size(); i) {String region String.valueOf(list.get(i).get(region));hashSet.add(region);}String[] regionArr new String[hashSet.size()];int[] valueSort new int[hashSet.size()];// Set转数组if(list.size() 0){regionArr hashSet.toArray(new String[hashSet.size()]);}// 根据数组计算每个元素的数量for (int i 0; i regionArr.length; i) {for (int j 0; j list.size(); j) {String s String.valueOf(list.get(j).get(region));if(regionArr[i].equals(s)){valueSort[i] valueSort[i] 1;}}}// 排序BubblSortUtils.bubbleSortDescMultiple(valueSort,regionArr);ListMapString,Object listFinal new ArrayList();for (int i 0; i regionArr.length; i) {MapString,Object map new HashMap();map.put(title,regionArr[i]);map.put(value,valueSort[i]);listFinal.add(map);}System.out.println(listFinal:listFinal);}
}
测试输出
listFinal:[{title上海, value4}, {title西安, value3}, {title苏州, value2}, {title北京, value2}, {title长沙, value2}, {title江西, value1}, {title成都, value1}]
案例二 public ListMapString,Object getRevealData(HttpServletRequest request, MapString, Object paramMap) {ListMapString,Object list getCountData(request,paramMap);if(list.size() 0){return null;}// 获取数据的类型去重SetString hashSet new HashSet();for (int i 0; i list.size(); i) {String waysOfProblemReveal String.valueOf(list.get(i).get(waysOfProblemReveal));hashSet.add(waysOfProblemReveal);}String[] waysOfProblemArr new String[hashSet.size()];int[] valueSort new int[hashSet.size()];if(list.size() 0){waysOfProblemArr hashSet.toArray(new String[hashSet.size()]);}// 根据数组计算每个元素的个数for (int i 0; i waysOfProblemArr.length; i) {for (int j 0; j list.size(); j) {String s String.valueOf(list.get(j).get(waysOfProblemReveal));if(waysOfProblemArr[i].equals(s)){valueSort[i] valueSort[i] 1;}}}// 数组排序BubblSortUtils.bubbleSortDescMultiple(valueSort,waysOfProblemArr);ListMapString,Object listFinal new ArrayList();for (int i 0; i waysOfProblemArr.length; i) {MapString,Object map new HashMap();map.put(title,waysOfProblemArr[i]);map.put(value,valueSort[i]);map.put(sortValue,waysOfProblemArr.length-i);listFinal.add(map);}return listFinal;}postman接口测试
