抽词程序

package grid.text.evolution;

import grid.common.TextUtils;
import grid.text.dic.CnDictionary;
import grid.text.index.CnPreviewTextIndexer;
import grid.text.index.TextIndexer;
import grid.text.selector.CnTextSelector;
import grid.text.selector.TextSelector;

import java.util.HashSet;
import java.util.Set;


public class NewWordDiscover {

    private CnDictionary dictionary;

    /** * Minimum word length */
    private final static int MIN_CANDIDATE_LEN = 2;

    /** * Maximum word length */
    private final static int MAX_CANDIDATE_LEN = 6;

    private static Set<Character> structuralLetterSet = new HashSet<Character>();

    private static char[] structuralLetters = { '我','你','您','他','她','谁','哪','那','这','的','了','着','也','是','有','不','在','与','呢','啊','呀','吧','嗯','哦','哈','呐' };

    static {
        for (char c : structuralLetters) {
            structuralLetterSet.add(c);
        }
    }

    public NewWordDiscover() {
        dictionary = CnDictionary.Instance();
    }

    /** * New word discover is based on statistic and entropy,better to sure * document size is in 100kb level,or you may get a unsatisfied result. * * @param document * @return */
    public Set<String> discover(String document) {

        Set<String> set = new HashSet<String>();
        TextIndexer indexer = new CnPreviewTextIndexer(document);
        TextSelector selector = new CnTextSelector(document,MIN_CANDIDATE_LEN,MAX_CANDIDATE_LEN);
        EntropyJudger judger = new EntropyJudger(indexer);
        String candidate;
        while (!selector.end()) {
            candidate = selector.next();
            if (TextUtils.isBlank(candidate)) {
                continue;
            }
            if (structuralLetterSet.contains(candidate.charAt(0))
                    || structuralLetterSet.contains(candidate.charAt(candidate
                            .length() - 1))) {
                continue;
            }
            // Replace IF clause with "set.contains(candidate)" if you want to
            // find new word without any dictionary
            if (dictionary.contains(candidate) || set.contains(candidate)) {
                selector.select();
            } else if (judger.judge(candidate)) {
                set.add(candidate);
            }
        }
        return set;
    }
}

index

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