Lucene之——设置高亮核心代码

package com.lyz.d;

import org.apache.lucene.search.Query;
import org.apache.lucene.search.highlight.Formatter;
import org.apache.lucene.search.highlight.Highlighter;
import org.apache.lucene.search.highlight.QueryScorer;
import org.apache.lucene.search.highlight.Scorer;
import org.apache.lucene.search.highlight.SimpleFragmenter;
import org.apache.lucene.search.highlight.SimpleHTMLFormatter;

/**
* 高亮工具类
* @author liuyazhuang
*
*/
public class HighlighterUtil {

private static Formatter formatter = null;
private static Scorer scorer = null;
static{
formatter = new SimpleHTMLFormatter("<font color='red'>", "</font>");
}

/**
* 设置高亮
* @param query：查询的query
* @param field:高亮的字段
* @param value:高亮的值
* @param size:大小
* @return：高亮后的数据
*/
public static String setHighData(Query query, String field, String value, int size){
String result = null;
scorer = new QueryScorer(query);
//高亮工具类
Highlighter highlighter  = new Highlighter(formatter, scorer);
//设置数据长度
highlighter.setTextFragmenter(new SimpleFragmenter(size));
try {
result = highlighter.getBestFragment(Configuration.getAnalyzer(), field, value);
if(result == null){
if(value.length() > size){
result = value.substring(0, size);
}else{
result = value;
}
}
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
return result;
}
}