lucene6.4.2高亮测试源码 一定要导入这个包lucene-memory-6.4.2.jar

一定要导入这个包lucene-memory-6.4.2.jar，虽然没有显示地调用。坑死我了。

测试结果：

Found 3 hits.
1. 193398817 Lucene in Action小说
高亮关键字  Lucene in Action<span style='color:red;'>小</span><span style='color:red;'>说</span>
2. 9900333X The Art of Computer Science
高亮关键字  The Art of <span style='color:red;'>Computer</span> Science
3. 55320055Z Lucene for Dummies说
高亮关键字  Lucene for Dummies<span style='color:red;'>说</span>

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.queryparser.classic.ParseException;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopScoreDocCollector;
import org.apache.lucene.search.highlight.Formatter;
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;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
import java.io.IOException;
import java.io.StringReader;
 
public class HeighterTest {

	//static StandardAnalyzer analyzer = new StandardAnalyzer();
  public static void main(String[] args) throws IOException, ParseException {
    // 0. Specify the analyzer for tokenizing text.
    //    The same analyzer should be used for indexing and searching
    Analyzer analyzer = new StandardAnalyzer();
 
    // 1. create the index
    Directory index = new RAMDirectory();
	//Directory index=FSDirectory.open(Paths.get("c:/demo"));//open("c:/demo");
	
    IndexWriterConfig config = new IndexWriterConfig(analyzer);
 
    IndexWriter w = new IndexWriter(index, config);
    addDoc(w, "Lucene in Action小说", "193398817");
    addDoc(w, "Lucene for Dummies说", "55320055Z");
    addDoc(w, "Managing Gigabytes", "55063554A");
    addDoc(w, "The Art of Computer Science", "9900333X");
    w.close();
 
    // 2. query
    String querystr = args.length > 0 ? args[0] : "小说 ddd Computer";
 
    // the "title" arg specifies the default field to use
    // when no field is explicitly specified in the query.
    Query q = new QueryParser("title", analyzer).parse(querystr);
 
    // 3. search
    int hitsPerPage = 8;
    IndexReader reader = DirectoryReader.open(index);
    IndexSearcher searcher = new IndexSearcher(reader);
    TopScoreDocCollector collector = TopScoreDocCollector.create(hitsPerPage);
    searcher.search(q, collector);
    ScoreDoc[] hits = collector.topDocs().scoreDocs;
     
    // 4. display results
    QueryScorer scorer = new QueryScorer(q);
    Formatter formatter = new SimpleHTMLFormatter("<span style='color:red;'>", "</span>");
    Highlighter highlight = new Highlighter(formatter,scorer);
   // Highlighter highlight = new Highlighter(scorer);
  
    System.out.println("Found " + hits.length + " hits.");
    for(int i=0;i<hits.length;++i) {
      int docId = hits[i].doc;
      Document d = searcher.doc(docId);
      System.out.println((i + 1) + ". " + d.get("isbn") + "\t" + d.get("title"));
      
      
      // 高亮关键字  
      try {
   	   TokenStream tokenStream = analyzer.tokenStream("title", new StringReader( d.get("title")));
   	   String highlightStr = highlight.getBestFragment(tokenStream,  d.get("title"));
   		System.out.println("高亮关键字  "+highlightStr);
   	} catch (InvalidTokenOffsetsException e) {
   		// TODO Auto-generated catch block
   		e.printStackTrace();
   	}

    }

    // reader can only be closed when there
    // is no need to access the documents any more.
    reader.close();
  }
 
  private static void addDoc(IndexWriter w, String title, String isbn) throws IOException {
    Document doc = new Document();
    doc.add(new TextField("title", title, Field.Store.YES));
 
    // use a string field for isbn because we don't want it tokenized
    doc.add(new StringField("isbn", isbn, Field.Store.YES));
    w.addDocument(doc);
  }
  /** 
   * 高亮设置 
   *  
   * @param query 
   * @param doc 
   * @param field 
   * @return 
   */  
//  protected static String toHighlighter(Query query, Document doc, String field) {  
//      try {  
//          SimpleHTMLFormatter simpleHtmlFormatter = new SimpleHTMLFormatter("<font color=\"blue\">", "</font>");  
//          Highlighter highlighter = new Highlighter(simpleHtmlFormatter, new QueryScorer(query));  
//          TokenStream tokenStream1 = analyzer.tokenStream("text", new StringReader(doc.get(field)));  
//          String highlighterStr = highlighter.getBestFragment(tokenStream1, doc.get(field));  
//          return highlighterStr == null ? doc.get(field) : highlighterStr;  
//      } catch (IOException e) {  
//          e.printStackTrace();  
//      } catch (InvalidTokenOffsetsException e) {  
//          e.printStackTrace();  
//      }  
//      return null;  
//  }  
}

之前一直报这个错，导入这个包lucene-memory-6.4.2.jar就好了，虽然没有显示地调用：

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/lucene/index/memory/MemoryIndex
at org.apache.lucene.search.highlight.WeightedSpanTermExtractor.getLeafContext(WeightedSpanTermExtractor.java:399)
at org.apache.lucene.search.highlight.WeightedSpanTermExtractor.extractWeightedTerms(WeightedSpanTermExtractor.java:363)
at org.apache.lucene.search.highlight.WeightedSpanTermExtractor.extract(WeightedSpanTermExtractor.java:142)
at org.apache.lucene.search.highlight.WeightedSpanTermExtractor.extract(WeightedSpanTermExtractor.java:113)
at org.apache.lucene.search.highlight.WeightedSpanTermExtractor.extract(WeightedSpanTermExtractor.java:113)
at org.apache.lucene.search.highlight.WeightedSpanTermExtractor.getWeightedSpanTerms(WeightedSpanTermExtractor.java:522)
at org.apache.lucene.search.highlight.QueryScorer.initExtractor(QueryScorer.java:218)
at org.apache.lucene.search.highlight.QueryScorer.init(QueryScorer.java:186)
at org.apache.lucene.search.highlight.Highlighter.getBestTextFragments(Highlighter.java:195)
at org.apache.lucene.search.highlight.Highlighter.getBestFragments(Highlighter.java:155)
at org.apache.lucene.search.highlight.Highlighter.getBestFragment(Highlighter.java:101)
at HeighterTest.main(HeighterTest.java:80)
Caused by: java.lang.ClassNotFoundException: org.apache.lucene.index.memory.MemoryIndex
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 12 more