lucene入门代码四（使用css高亮文本）
1.本代码需要的jar包有：
lucene-core-3.0.0.jar
lucene-analyzers-3.0.0.jar
lucene-highlighter-3.0.0.jar
代码如下：
package com.yale.lucene;import java.io.FileWriter;import java.io.StringReader;import org.apache.lucene.analysis.TokenStream;import org.apache.lucene.analysis.standard.StandardAnalyzer;import org.apache.lucene.queryParser.QueryParser;import org.apache.lucene.search.Query;import org.apache.lucene.search.highlight.Highlighter;import org.apache.lucene.search.highlight.QueryScorer;import org.apache.lucene.search.highlight.SimpleHTMLFormatter;import org.apache.lucene.search.highlight.SimpleSpanFragmenter;import org.apache.lucene.util.Version;/** * * 使用CSS高亮terms * */public class HighlightTermsUseCSS{private static final String text ="In this section we'll show you how to make the simplest " +"programmatic query, searching for a single term, and then " +"we'll see how to use QueryParser to accept textual queries. " +"In the sections that follow, we’ll take this simple example " +"further by detailing all the query types built into Lucene. " +"We begin with the simplest search of all: searching for all " +"documents that contain a single term.";public static void main(String[] args) throws Exception{//将高亮后的html代码写入此文件String filename="F://新建文件夹//luceneTest//dataSource//highlight.html";//要搜索的关键字String searchText = "term";//创建QueryParserQueryParser parser = new QueryParser(Version.LUCENE_30,"f",new StandardAnalyzer(Version.LUCENE_30));//得到QueryQuery query = parser.parse(searchText);//要高亮的文本添加样式SimpleHTMLFormatter formatter = new SimpleHTMLFormatter("<span class=\"highlight\">","</span>");//TokenStream用来分析文字流，按一定的规则罗列tokenTokenStream tokens = new StandardAnalyzer(Version.LUCENE_30).tokenStream("f",new StringReader(text));//声明查询记分器QueryScorer scorer = new QueryScorer(query,"f");//声明高亮的关键类Highlighter highlighter = new Highlighter(formatter,scorer);//设置段划分器;使用SimpleSpanFragmenterhighlighter.setTextFragmenter(new SimpleSpanFragmenter(scorer));//得到高亮的片段String result = highlighter.getBestFragments(tokens,text,3,"...");//写入文件操作FileWriter writer = new FileWriter(filename);writer.write("<html>");writer.write("<style>\n" +".highlight {\n" +" background: yellow;\n" +"}\n" +"</style>");writer.write("<body>");writer.write(result);writer.write("</body></html>");writer.close();System.out.println("完成");}}效果图如下：
