List<String> list = new ArrayList<String>();
for (String s : acctitleIdArray) {
    list.add(s);
}
List<String> existList = new ArrayList<String>(limitSubList).retainAll(list);
List<String> notExistList = list.removeAll(limitSubList);

StringBuilder existBuf = new StringBuilder();
for (String s : existsList) {
    existBuf.append(s).append(",");
}
if (existBuf.length()>0) {existBuf.delete(existBur.length()-1, existBur.length());}

StringBuilder notExistBuf = new StringBuilder();
for (String s : notExistList) {
    notExistBuf.append(s).append(",");
}
if (notExistBuf.length()>0) {notExistBuf.delete(notExistBuf.length()-1, notExistBuf.length());}
String[] result = new String[]{existBuf.toString(), notExistBuf.toString()};
return result;

------解决方案--------------------
探讨


利用集合的交并差方法就可以了

Java code
List<String> list = new ArrayList<String>();
for (String s : acctitleIdArray) {
    list.add(s);
}
List<String> existList = new ArrayList<String>(limitSubList).retainAll(……