lucene 4.4 demo

ackage com.zxf.demo;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;

import org.apache.lucene.analysis.Analyzer;
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.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;



public class LuceneForuDemo {
static final String INDEXPATH = System.getProperty("user.dir") + "\index";
static final String DATAPATH = System.getProperty("user.dir") + "\data";

public static void main(String[] args) {
try{
LuceneForuDemo.indexDirectory();
LuceneForuDemo.search();
}catch (Exception e) {
e.printStackTrace();
}
}

/**
* 建立索引
* @throws Exception
*/
public static void indexDirectory() throws Exception{
File indexDir = new File(LuceneForuDemo.INDEXPATH);
File dataDir = new File(LuceneForuDemo.DATAPATH);

Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_44);
IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_44, analyzer);
Directory dir = FSDirectory.open(indexDir);
IndexWriter indexWriter = new IndexWriter(dir, iwc);

File[] dataFiles = dataDir.listFiles();
for (File file : dataFiles) {
FileInputStream inStream = new FileInputStream(file);
Document doc = new Document();
Field fullFileName = new StringField("fullFileName", file.getCanonicalPath(),Field.Store.YES);
doc.add(fullFileName);
doc.add(new TextField("contents", new BufferedReader(
new InputStreamReader(inStream, "UTF-8")
)
)
);
indexWriter.addDocument(doc);
}
indexWriter.close();
}

/*搜索*/
public static void search() throws Exception{
String field = "contents";
String queryStr = "test"; //搜索的字符串
File indexDir = new File(LuceneForuDemo.INDEXPATH);
IndexReader reader = DirectoryReader.open(FSDirectory.open(indexDir));
IndexSearcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_44);
QueryParser parser = new QueryParser(Version.LUCENE_44, field, analyzer);
Query query = parser.parse(queryStr);
System.out.println("Searching for: " + query.toString(field));
TopDocs results = searcher.search(query, 50);
ScoreDoc[] hits = results.scoreDocs;
int numTotalHits = results.totalHits;
System.out.println(numTotalHits + " total matching in documents");
for(ScoreDoc sd:hits){
Document doc = searcher.doc(sd.doc);
System.out.println(doc.get("fullFileName"));
}


}
}