十三、自定义Stop分词器

import java.io.Reader;
import java.util.Set;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.LetterTokenizer;
import org.apache.lucene.analysis.LowerCaseFilter;
import org.apache.lucene.analysis.StopAnalyzer;
import org.apache.lucene.analysis.StopFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.util.Version;

public class MyStopAnalyzer extends Analyzer {
    @SuppressWarnings( { "unchecked" })
    private final Set    stops;
   
    @SuppressWarnings("unchecked")
    public MyStopAnalyzer(String[] sws) {
        //会自动将字符串数组转换为Set
        stops = StopFilter.makeStopSet(Version.LUCENE_35, sws, true);
        //将原有的停用词加入到现在的停用词
        stops.addAll(StopAnalyzer.ENGLISH_STOP_WORDS_SET);
    }
   
    public MyStopAnalyzer() {
        //获取原有的停用词
        stops = StopAnalyzer.ENGLISH_STOP_WORDS_SET;
    }
   
    @Override
    public TokenStream tokenStream(String fieldName, Reader reader) {
        //为这个分词器设定过滤链和Tokenizer
        return new StopFilter (Version.LUCENE_35, new LowerCaseFilter(Version.LUCENE_35,
            new LetterTokenizer (Version.LUCENE_35, reader)), stops);
    }
   
}