以下程序需要lucene-core-2.0.0.jar
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.demo.FileDocument;
import org.apache.lucene.index.IndexWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Date;
public class IndexFiles {
private IndexFiles() {}
//索引文件存放位置
static final File INDEX_DIR = new File("d://index");
public static void main(String[] args) {
final File docDir = new File("e://");
if (!docDir.exists() || !docDir.canRead()) {
System.out.println("Document directory '" +docDir.getAbsolutePath()+ "' does not exist or is not readable, please check the path");
System.exit(1);
}
Date start = new Date();
try {
IndexWriter writer = new IndexWriter(INDEX_DIR, new StandardAnalyzer(), true);
System.out.println("Indexing to directory '" +INDEX_DIR+ "'...");
indexDocs(writer, docDir);
System.out.println("Optimizing...");
writer.optimize();
writer.close();
Date end = new Date();
System.out.println(end.getTime() - start.getTime() + " total milliseconds");
} catch (IOException e) {
System.out.println(" caught a " + e.getClass() +
"/n with message: " + e.getMessage());
}
}
static void indexDocs(IndexWriter writer, File file)
throws IOException {
// do not try to index files that cannot be read
if (file.canRead()) {
if (file.isDirectory()) {
String[] files = file.list();
// an IO error could occur
if (files != null) {
for (int i = 0; i < files.length; i++) {
indexDocs(writer, new File(file, files[i]));
}
}
} else if(file.getName().endsWith(".java")){
System.out.println("adding " + file);
try {
writer.addDocument(FileDocument.Document(file));
}
catch (FileNotFoundException fnfe) {
;
}
}
}
}
}
public class FileDocument {
public static Document Document(File f)
throws java.io.FileNotFoundException {
// make a new, empty document
Document doc = new Document();
// Add the path of the file as a field named "path". Use a field that is
// indexed (i.e. searchable), but don't tokenize the field into words.
doc.add(new Field("path", f.getPath(), Field.Store.YES, Field.Index.UN_TOKENIZED));
// Add the last modified date of the file a field named "modified". Use
// a field that is indexed (i.e. searchable), but don't tokenize the field
// into words.
doc.add(new Field("modified",
DateTools.timeToString(f.lastModified(), DateTools.Resolution.MINUTE),
Field.Store.YES, Field.Index.UN_TOKENIZED));
// Add the contents of the file to a field named "contents". Specify a Reader,
// so that the text of the file is tokenized and indexed, but not stored.
// Note that FileReader expects the file to be in the system's default encoding.
// If that's not the case searching for special characters will fail.
doc.add(new Field("contents", new FileReader(f)));
// return the document
return doc;
}
private FileDocument() {}
}