我希望实现一个高速的Trie内存实现,以创建后端自动建议/拼写检查。 是否已有一些基于内存实现(如Hazlecast)的好的实现? 还有哪个Java开源工具最适合这种用法?
我会使用一个普通的NavigableSet,例如TreeSet。它内置支持范围搜索。
NavigableSet<String> words = new TreeSet<String>();
// add words.
String startsWith = ...
SortedSet<String> matching = words.subSet(startsWith, startsWith + '\uFFFF');
List<String> words = new ArrayList<String>();
words.add("aa");
words.add("ab");
words.add("ac");
words.add("ba");
Collections.sort(words);
String startsWith = "a";
int first = Collections.binarySearch(words, startsWith);
int last = Collections.binarySearch(words, startsWith.concat("\uFFFF"));
if (first < 0) first = ~first;
if (last < 0) last = ~last - 1;
for (int i = first; i <= last; i++) {
System.out.println(words.get(i));
}