lucene4.5.0----高亮显示实现

重要的类：Highlighter；Scorer；Formatter；Fragmenter；

简单的高亮显示实现：

 

public class HighlighterUtil {

public void createSimpleHighLighter(String queryString) {
try {
String string="I like basketball . I like football too . " +
"I am come from jiangxi province .";
QueryParser queryParser=new QueryParser(Version.LUCENE_45, "text",
new StandardAnalyzer(Version.LUCENE_45));
Query query=queryParser.parse(queryString);
//Query query=new TermQuery(new Term("text", input));
QueryScorer fragmentScorer=new QueryScorer(query,"text");
//SimpleSpanFragmenter fragmenter=new SimpleSpanFragmenter(fragmentScorer);
Formatter formatter=new SimpleHTMLFormatter("<BIG>","</BIG>");
Highlighter highlighter=new Highlighter(formatter,fragmentScorer);
//highlighter.setTextFragmenter(fragmenter);
String result=highlighter.getBestFragment(new StandardAnalyzer(Version.LUCENE_45),"text",string);
System.out.println(result);
} catch (IOException e) {
e.printStackTrace();
} catch (InvalidTokenOffsetsException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
}
}
}

测试：

@Test
public void  simpleHighLighterTest() {
HighlighterUtil highlighterUtil=new HighlighterUtil();
highlighterUtil.createSimpleHighLighter("like");
}

输出：

I <BIG>like</BIG> basketball . I <BIG>like</BIG> football too . I am come from jiangxi province .

这就是最基础的。当然你还可以进行扩展：比如：对文档名包含某个关键字进行高亮，对文档内容包括某个关键字进行高亮。