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id相同时cookie重复问题？

求怎样改进id重复的问题？试了试大家的代码，自己加进去还是不行，不知道加到哪里？

Atheny

2016-06-21

源自：JAVA遇见HTML——JSP篇 8-8

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慕盖茨9747674
2016-12-12

Public ArrayList<Items> getViewList(String list){
       ArrayList<Items> itemList = new ArrayList<Items>();
           ArrayList<Integer> ls = new ArrayList<Integer>();
           String[] arr=list.split(",");
           int iCount=5;
           if(list!=null&&list.length()>0){
               for(int i=arr.length-1;i>=0;i--){
                  if(ls!=null&&!ls.isEmpty()){
                     if(ls.contains(Integer.parseInt(arr[i]))){
                        continue;
                     }else{
                        ls.add(Integer.parseInt(arr[i]));
                     }
                  }else{
                     ls.add(Integer.parseInt(arr[i]))
                  }
                 }
               if(ls.size()<=iCount){
                  for(Integer i:ls){
                     itemList.add(getItemById(id));
                  }    
               }else{
                  for(int i=0;i<iCount;i++){
                     itemList.add(getItemById(ls.get(i)));
                  }
               }
               return itemList;
           }else{
               return null;
           }
}