String数组跟Integer数组

String数组和Integer数组
Integer数组

Set<Integer> userSet = new HashSet<Integer>();
Integer[] arrUids = userSet.toArray(new Integer[userSet.size()]);

String数组
Collection<String> pids
String[] keys = pids.toArray(new String[pids.size()]);


Integer列表转为String数组
List<Integer> appPageIds
int size = appPageIds.size();
String keys = new String[size];
for(int i=0;i<size;i++){
    Integer appPageId = appPageIds.get(i);
    if (appPageId != null){
        keys[i] = appPageId.toString();
    }
}

Map<String, AppPage> cacheValue = cache.getMulti(keys);