1.indexing
/**
*
*/
package org.apache.lucene.test;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
/**
* @author LJW
*
*/
public class Indexer {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
File indexDir = new File(Constant.indexDirStr);
File dataDir = new File(Constant.dataDirStr);
IndexWriter writer = null;
try {
writer = new IndexWriter(indexDir, new StandardAnalyzer(), true);
writer.setUseCompoundFile(false);
index(writer,dataDir);
int indexCount=writer.docCount();
writer.optimize();
writer.close();
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println("" + e.toString());
e.printStackTrace();
}
}
public static void index(IndexWriter writer, File dataDir) {
File[] files = dataDir.listFiles();
for (int i = 0; i < files.length; i++) {
File f = files[i];
try {
if (!f.isDirectory() && f.getName().endsWith(".txt")) {
if (f.isHidden() || !f.exists() || !f.canRead()) {
return;
}
System.out.println("Index...." + f.getCanonicalPath());
Document doc = new Document();
doc.add(Field.Text("content", new FileReader(f)));
doc.add(Field.Keyword("path", f.getCanonicalPath()));
writer.addDocument(doc);
}
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println("" + e.toString());
e.printStackTrace();
}
}
}
}
2.searcher
/**
*
*/
package org.apache.lucene.test;
import java.io.File;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
/**
* @author LJW
*
*/
public class Searcher {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
File indexDir=new File(Constant.indexDirStr);
if(!indexDir.exists()||!indexDir.isDirectory())
{
System.out.println(indexDir+" does not exists or is not a directory !");
return;
}
try {
search(indexDir,Constant.querystr);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println(e.toString());
}
}
public static void search(File indexDir,String querystr)throws Exception
{
Directory fsdir=FSDirectory.getDirectory(indexDir, false);
IndexSearcher is=new IndexSearcher(fsdir);
Query q=QueryParser.parse(querystr, "content", new StandardAnalyzer());
Hits hits=is.search(q);
System.out.println("Found "+hits.length()+" documents matched the /""+querystr+"/"");
for(int i=0;i<hits.length();i++)
{
Document doc=hits.doc(i);
System.out.println(doc.getField("path"));
}
}
}
3.Constant
/**
*
*/
package org.apache.lucene.test;
/**
* @author LJW
*
*/
public class Constant {
public static final String indexDirStr = "D://workspace//testdata//indexdir";
public static final String dataDirStr = "D://workspace//testdata";
public static final String querystr="student";
}
