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);