java使用Lucene建全文索引代码，lucene全文索引,package cn.o

java使用Lucene建全文索引代码，lucene全文索引,package cn.o

package cn.outofmemory.lucene;import java.io.File;import java.io.FileReader;import java.io.IOException;import org.apache.lucene.analysis.SimpleAnalyzer;import org.apache.lucene.document.Document;import org.apache.lucene.document.Field;import org.apache.lucene.index.IndexWriter;import org.apache.lucene.store.FSDirectory;public class SimpleFileIndexer {    public static void main(String[] args) throws Exception {        File indexDir = new File("C:/index/");        File dataDir = new File("C:/programs/eclipse/workspace/");        String suffix = "java";        SimpleFileIndexer indexer = new SimpleFileIndexer();        int numIndex = indexer.index(indexDir, dataDir, suffix);        System.out.println("Total files indexed " + numIndex);    }    private int index(File indexDir, File dataDir, String suffix) throws Exception {        IndexWriter indexWriter = new IndexWriter(                FSDirectory.open(indexDir),                 new SimpleAnalyzer(),                true,                IndexWriter.MaxFieldLength.LIMITED);        indexWriter.setUseCompoundFile(false);        indexDirectory(indexWriter, dataDir, suffix);        int numIndexed = indexWriter.maxDoc();        indexWriter.optimize();        indexWriter.close();        return numIndexed;    }    private void indexDirectory(IndexWriter indexWriter, File dataDir,            String suffix) throws IOException {        File[] files = dataDir.listFiles();        for (int i = 0; i < files.length; i++) {            File f = files[i];            if (f.isDirectory()) {                indexDirectory(indexWriter, f, suffix);            }            else {                indexFileWithIndexWriter(indexWriter, f, suffix);            }        }    }    private void indexFileWithIndexWriter(IndexWriter indexWriter, File f,             String suffix) throws IOException {        if (f.isHidden() || f.isDirectory() || !f.canRead() || !f.exists()) {            return;        }        if (suffix!=null && !f.getName().endsWith(suffix)) {            return;        }        System.out.println("Indexing file " + f.getCanonicalPath());        Document doc = new Document();        doc.add(new Field("contents", new FileReader(f)));                doc.add(new Field("filename", f.getCanonicalPath(),            Field.Store.YES, Field.Index.ANALYZED));        indexWriter.addDocument(doc);    }}