Test.java

import java.io.IOException;

import org.junit.Assert;
import org.junit.Test;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.core.KeywordAnalyzer;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.highlight.Highlighter;
import org.apache.lucene.search.highlight.InvalidTokenOffsetsException;
import org.apache.lucene.search.highlight.QueryScorer;
import org.apache.lucene.search.highlight.SimpleHTMLFormatter;

public class Test {

	@Test
	public void test() throws Exception {
		Query query = new TermQuery( new Term( "notAnalyzedField", "a-bbb-ccc" ) );
		String highlighted = highlightText( query, new KeywordAnalyzer(), "notAnalyzedField", "a-bbb-ccc" );
		Assert.assertEquals( "<span>a-bbb-ccc</span>", highlighted );
	}

	String highlightText(Query query, Analyzer analyzer, String fieldName, String text)
			throws IOException, InvalidTokenOffsetsException {
		QueryScorer queryScorer = new QueryScorer(query);
		SimpleHTMLFormatter formatter = new SimpleHTMLFormatter("<span>", "</span>");
		Highlighter highlighter = new Highlighter(formatter, queryScorer);
		return highlighter.getBestFragment(analyzer, fieldName, text);
	}

}