如何用Lucene为目录创建索引

现在网上很多例子都是基于老版本的Lucene做得例子，我给改了一下，这个例子是基于lucene 2.4的，希望能有所帮助

1. packageutils;
3. importjava.io.File;
4. importjava.io.FileReader;
5. importjava.io.IOException;
6. importjava.io.Reader;
8. importorg.apache.lucene.analysis.standard.StandardAnalyzer;
9. importorg.apache.lucene.document.Document;
10. importorg.apache.lucene.document.Field;
11. importorg.apache.lucene.index.IndexWriter;
13. publicclassIndexer{
15. publicintindex(StringindexDir,StringdataDir)throwsIOException
16. {
17. FileindexDirFile=newFile(indexDir);
18. FiledataDirFile=newFile(dataDir);
19. intnumIndexed=index(indexDirFile,dataDirFile);
20. return0;
21. }
23. privateintindex(FileindexDirFile,FiledataDirFile)throwsIOException{
24. if(!dataDirFile.exists()||!dataDirFile.isDirectory())
25. {
26. thrownewIOException(dataDirFile+"doesnotexistorisnotadirectory");
27. }
28. IndexWriterwriter=newIndexWriter(indexDirFile,newStandardAnalyzer(),true);
29. writer.setUseCompoundFile(false);
30. indexDirectory(writer,dataDirFile);
32. intnumIndexed=writer.docCount();
33. writer.optimize();
34. writer.close();
35. returnnumIndexed;
36. }
38. privatevoidindexDirectory(IndexWriterwriter,FiledataDirFile)throwsIOException{
39. File[]files=dataDirFile.listFiles();
40. for(inti=0;i<files.length;i++)
41. {
42. Filef=files[i];
43. if(f.isDirectory())
44. {
45. indexDirectory(writer,f);
46. }elseif(f.getName().endsWith(".java") || f.getName().endsWith(".txt"))//需要索引的文件类型
47. {
48. indexFile(writer,f);
49. }
51. }
53. }
55. privatevoidindexFile(IndexWriterwriter,Filef)throwsIOException{
56. if(f.isHidden()||!f.exists()||!f.canRead())
57. {
58. return;
59. }
60. System.out.println("Indexing"+f.getCanonicalPath());
61. Documentdoc=newDocument();
62. ReadertxtReader=newFileReader(f);
63. doc.add(newField("path",f.getCanonicalPath(),Field.Store.YES,Field.Index.UN_TOKENIZED));
64. doc.add(newField("contents",txtReader));
65. doc.add(newField("name",f.getName(),Field.Store.YES,Field.Index.UN_TOKENIZED));
66. writer.addDocument(doc);
67. }
69. }

调用的代码如下：

1. StringfilesRepoDir="C:/workspace-2.0";//需要被索引的目录
2. StringindexDir="C:/apache-tomcat-6.0.18/webapps/index";//存放索引的目录
3. Indexerindexer=newIndexer();
4. indexer.index(indexDir,filesRepoDir);