List<Map> maps1 =[{"bigtypes":100,"num":400},{"bigtypes":200,"num":300},{"bigtypes":400,"num":500},{"bigtypes":600,"num":500}] List<Map> maps2 =[{"bigtypes":400,"num":720},{"bigtypes":500,"num":320},{"bigtypes":200,"num":120}] List<Map> maps3 =[{"bigtypes":700,"num":120},{"bigtypes":500,"num":320},{"bigtypes":100,"num":510}]
目的为将 bigtypes 属性值相等 num属性值进行相加,bigtypes属性值不相等的List<Map>累加
将json数组循环赋值给 foodIntakeType
List<TDiet> tDiets = dietApiService.getDietsByDate(userId, startDate, endDate); List<Map<String, String>> list = new ArrayList(); List<Map<String, String>> newList = new ArrayList(); int talls=0; if(tDiets.size()>0){ int a=0; for(TDiet td:tDiets){ talls+=Integer.parseInt(td.getFoodIntakeMeasure());//摄入总量 a++; String foodIntakeType =td.getFoodIntakeType(); org.json.JSONArray jsonArray = new org.json.JSONArray(foodIntakeType); int iSize = jsonArray.length(); for (int i = 0; i < iSize; i++) { org.json.JSONObject jsonObj = jsonArray.getJSONObject(i); String bigtypes = jsonObj.get("bigtypes").toString(); String num = jsonObj.get("num").toString(); Map<String, String> maMap = new HashMap<String, String>(); maMap.put("bigtypes", bigtypes); maMap.put("num", num); if(a>1){//多组数据 newList=list; Map<String,String> newMap =new HashMap<String, String>(); int b=0; for (int j = 0; j < list.size(); j++) { newMap= list.get(j); if(bigtypes.equals(newMap.get("bigtypes").toString())){//key值相等的:value相加 b++; newList.remove(j); Map<String, String> maMap2 = new HashMap<String, String>(); maMap2.put("bigtypes", bigtypes); int xx= Integer.parseInt(newMap.get("num"))+Integer.parseInt(num); maMap2.put("num",xx+"" ); newList.add(maMap2); break; } } if(b==0){//key值与list<map>的map无共同key的:list新增 newList.add(maMap); } list= newList; }else{//只有一组数据 list.add(maMap); } } } //取百分比 newList=new ArrayList(); for (int c = 0; c < list.size(); c++) { Map<String,String> newMap2 =new HashMap<String, String>(); Map<String,String> oldmap=new HashMap<String, String>(); oldmap = list.get(c); newMap2.put("bigtypes", oldmap.get("bigtypes")); int aa= Integer.parseInt(oldmap.get("num")); newMap2.put("num",towNumDivide(aa,talls)+"%"); newList.add(newMap2); } list=newList; }
时间: 2024-10-08 09:13:40