lucene学习笔记1：创建索引并查询

package testLucene;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Date;

import org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.TokenStream;
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;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;

public class TestIndexHello {

	public void testIndex() throws IOException {
		Date date1 = new Date();

		IndexWriter writer = new IndexWriter("E:\\index\\index",
				new StandardAnalyzer(), true);
		File file = new File("E:\\test");

		if (file.isDirectory()) {
			File[] fileList = file.listFiles();
			for (int i = 0; i < fileList.length; i++) {
				Document doc = new Document();
				BufferedReader reader = new BufferedReader(
						new InputStreamReader(new FileInputStream(fileList[i]),
								"UTF-8"));
				// Reader reader = new BufferedReader(new
				// FileReader(fileList[i]));
				Field field1 = new Field("content", reader);
				Field field2 = new Field("path", fileList[i].getAbsolutePath(),
						Field.Store.YES, Field.Index.TOKENIZED);
				doc.add(field1);
				doc.add(field2);

				TokenStream ts = new StandardAnalyzer().tokenStream("content",
						reader);
				Token tk = ts.next();
				while (tk != null) {
					System.out.print(tk.term() + " ");
					tk = ts.next();
				}
				writer.addDocument(doc);
			}
		}
		writer.close();
		Date date2 = new Date();
		System.out.println("");
		System.out.println("建立索引用了" + (date2.getTime() - date1.getTime())
				+ "毫秒");
	}

	public void helloSearch() throws Exception {
		IndexSearcher seach = new IndexSearcher("E:\\index\\index");
		// System.out.println("请输入查询条件：");
		QueryParser parser = new QueryParser("content", new StandardAnalyzer());
		// BufferedReader br = new BufferedReader(new
		// InputStreamReader(System.in));
		// Query query = parser.parse(br.readLine());
		String str = new String("world");
		Query query = parser.parse(str);
		Hits hits = seach.search(query);
		System.out.println("'" + str + "'" + "正在搜索...");
		if (hits.length() == 0) {
			System.out.println("没有找到符合条件的结果");
		} else {
			for (int i = 0; i < hits.length(); i++) {
				Document doc = hits.doc(i);
				System.out.println("搜索结果是：" + doc.get("content"));
				System.out.println("文件路径是" + doc.get("path"));
			}
		}

	}

	public static void main(String[] args) {
		TestIndexHello tindex = new TestIndexHello();
		try {
			tindex.testIndex();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		try {
			tindex.helloSearch();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}

评论

1 楼 confident_f 2011-09-28  

你问过这个问题，这是怎么回事呢？