Lucene5.3.1之helloworld demo

1.项目结构

2.代码

package com.ccy.lucene;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.nio.file.Paths;

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.LongField;
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.junit.Test;

/**
 * 
 * 
 
 * Title: HelloWorld.java 
 * Package com.ccy.lucene 
 * 
 * 

 * Description: lucene helloworld demo
 * 

 * @author Tom.Cai
 * @created 2015-11-1 下午2:13:25 
 * @version V1.0 
 *
 */
public class HelloWorld {
	//源文件
	String filePath = "D:\\newWork\\lucene5.3\\luceneSourceFile\\IndexWriter addDocument's a javadoc .txt";
	//索引文件
	String indexPath = "D:\\newWork\\lucene5.3\\luceneIndex";
	//分词器
	private Analyzer analyzer = new StandardAnalyzer();
	
	@Test
	public void createIndex() throws Exception{
		//1.将文本转化为doc对象
		Document doc = file2Document(filePath);
		//2、打开索引库
		IndexWriterConfig config = new IndexWriterConfig(analyzer);
		Directory fsDir =  FSDirectory.open(Paths.get(indexPath));
		//3、写入索引库
		IndexWriter indexWiter = new IndexWriter(fsDir, config);
		indexWiter.addDocument(doc);
		//4.关闭
		indexWiter.close();
	}
	
	
	@Test
	public void search() throws Exception{
		//0、搜索关键字
		String queryString ="document";
		
		//1、打开索引库
		IndexReader reader = DirectoryReader.open(FSDirectory.open(Paths.get(indexPath)));
		IndexSearcher searcher = new IndexSearcher(reader);
	
		//2、搜索解析器
		QueryParser parser = new QueryParser("content", analyzer);
		Query query = parser.parse(queryString);
		
		//3、根据关键词进行搜索  
        TopDocs docs = searcher.search(query, 100);;  
        System.out.println("总共有【" + docs.totalHits + "】条匹配结果");
  
        //4、遍历结果并处理  
        for (ScoreDoc scoreDoc : docs.scoreDocs) {
			int docSn = scoreDoc.doc; // 文档内部编号
			Document doc = searcher.doc(docSn); // 根据编号取出相应的文档
			// 打印出文档信息
			System.out.println("------------------------------");
			System.out.println("name     = " + doc.get("name"));
			System.out.println("content  = " + doc.get("content"));
			System.out.println("size     = " + doc.get("size"));
			System.out.println("path     = " + doc.get("path"));
		}
        
        reader.close();  
	}
	
	
	
	/**
	 * //1.将文本转化为doc对象
	 * @param path
	 * @return
	 */
	public Document file2Document(String path){
		File file = new File(path);
		Document doc = new Document();
		doc.add(new Field("name", file.getName(),StringField.TYPE_STORED));
		doc.add(new Field("content", readFileContent(file),TextField.TYPE_STORED));
		doc.add(new LongField("size", file.length(),LongField.TYPE_STORED));
		doc.add(new Field("path", file.getAbsolutePath(),StringField.TYPE_STORED));
		return doc;
	}
	
	/**
	 * 读取文件内容
	 */
	public static String readFileContent(File file) {
		try {
			BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
			StringBuffer content = new StringBuffer();

			for (String line = null; (line = reader.readLine()) != null;) {
				content.append(line).append("\n");
			}
			return content.toString();
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
	}
}

3.结果

4.其他

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