lucene第一步---3.QueryParser用法示例

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lucene Apache 搜索引擎正则表达式

package demo.first;

import java.io.IOException;
import java.util.Date;

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.CorruptIndexException;
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;
import org.apache.lucene.search.Searcher;
import org.apache.lucene.store.LockObtainFailedException;

public class TestQueryParser {

	public static void main(String[] args) throws CorruptIndexException, IOException {
		String path = "D://workspace//fwk//lucenedemo//firstLuceneIndex";
		TestQueryParser tqp = new TestQueryParser();
		tqp.createIndex(path);
		Searcher search = tqp.getSearcher(path);
		System.out.println("#_2");
		tqp.testTime(search, tqp.getQueryParser2());
		System.out.println("#_1");
		tqp.testTime(search, tqp.getQueryParser1());
		System.out.println("#_3");
		tqp.testTime(search, tqp.getQueryParser3());
		System.out.println("#_4");
		tqp.testTime(search, tqp.getQueryParser4());
		System.out.println("#_5");
		tqp.testTime(search, tqp.getQueryParser5());
		System.out.println("#_6");
		tqp.testTime(search, tqp.getQueryParser6());
		System.out.println("#_7");
		tqp.testTime(search, tqp.getQueryParser7());
	}
	
	public void testTime(Searcher search,Query query) throws IOException{
		Date start = new Date();
		Hits hits = search.search(query);
		for (int i = 0; i < hits.length(); i++) {
			System.out.println(hits.id(i));
			System.out.println(hits.doc(i));
			System.out.println(hits.score(i));
		}
		
		System.out.println("本次搜索用时：" + ((new Date()).getTime() - start.getTime()) + "毫秒");
		
	}
	
	public Searcher getSearcher(String path) throws CorruptIndexException, IOException{
			return new IndexSearcher(path);
	}
	
	public Query getQueryParser1(){
		//默认搜索字段
		QueryParser queryParser = new QueryParser("content", new StandardAnalyzer());
		try {
			return queryParser.parse("搜索 - 擎");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	
	public Query getQueryParser2(){
		QueryParser queryParser = new QueryParser("content", new StandardAnalyzer());
		try {
			return queryParser.parse("欢迎");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	
	public Query getQueryParser3(){
		QueryParser queryParser = new QueryParser("content", new StandardAnalyzer());
		try {
			return queryParser.parse("搜索 and 擎");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	
	public Query getQueryParser4(){
		QueryParser queryParser = new QueryParser("content", new StandardAnalyzer());
		try {
			//content字段搜索 索引   title字段搜寻 你好
			return queryParser.parse("索引 title:你好");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	
	public Query getQueryParser5(){
		QueryParser queryParser = new QueryParser("content", new StandardAnalyzer());
		//允许使用正则表达式方式
		queryParser.setAllowLeadingWildcard(true);
		try {
			return queryParser.parse("*索*");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	/**
	 * 采用标准分词器StandardAnalyzer会在创建索引的时候把存入的英文全部换成小写放在索引中 查询的时候也会将查询的关键词转为小写进行查询
	 * @return
	 */
	public Query getQueryParser6(){
		QueryParser queryParser = new QueryParser("testCapital", new StandardAnalyzer());
		try {
			return queryParser.parse("hellOwangzi");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	
	/**
	 * 采用标准分词器StandardAnalyzer会在创建索引的时候把存入的and or等关键字过滤掉 所以在查询的时候怎么也查不到
	 * @return
	 */
	public Query getQueryParser7(){
		QueryParser queryParser = new QueryParser("testAndOr", new StandardAnalyzer());
		try {
			//return queryParser.parse("and");
			return queryParser.parse("test");
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}
	/**
	 * 创建索引
	 * @param path
	 */
	public void createIndex(String path){
		try {
			IndexWriter writer = new IndexWriter(path,new StandardAnalyzer(),true);
			Document docA = new Document();
			//相当于数据库中列的概念，因此第一个参数是列名，第二个参数是列的值，最后两个参数是enum类型的(JDK1.5)，对创建的索引的设置
			//Field.Store 是否覆盖原来的索引文件，而不是重新建一个
			Field fieldA = new Field("content","搜索引擎",Field.Store.YES,Field.Index.TOKENIZED);
			//我们把列(fieldA)加到某一行(docA)中
			docA.add(fieldA);
			
			docA.add(new Field("title","你好中国",Field.Store.YES,Field.Index.TOKENIZED));
			docA.add(new Field("content","欢迎你llying",Field.Store.YES,Field.Index.TOKENIZED));
			docA.add(new Field("lastModifyTime","2008-9-17",Field.Store.YES,Field.Index.TOKENIZED));
			docA.add(new Field("testCapital","HelloWangzi",Field.Store.YES,Field.Index.TOKENIZED));
			docA.add(new Field("testAndOr","test and",Field.Store.YES,Field.Index.TOKENIZED));
			
			Document docB = new Document();
			//相当于数据库中列的概念，因此第一个参数是列名，第二个参数是列的值，最后两个参数是enum类型的(JDK1.5)，对创建的索引的设置
			Field fieldB = new Field("content","创建索引",Field.Store.YES,Field.Index.TOKENIZED);
			//我们把列(fieldA)加到某一行(docA)中
			docB.add(fieldB);
			docB.add(new Field("title","你好世界",Field.Store.YES,Field.Index.TOKENIZED));
			docB.add(new Field("content","欢迎加入jee高级开发群46176507",Field.Store.YES,Field.Index.TOKENIZED));
			docB.add(new Field("lastModifyTime","2008-9-6",Field.Store.YES,Field.Index.TOKENIZED));
			docB.add(new Field("testCapital","hellowangZi",Field.Store.YES,Field.Index.TOKENIZED));
			docB.add(new Field("testAndOr","test or",Field.Store.YES,Field.Index.TOKENIZED));
			
			writer.addDocument(docA);
			writer.addDocument(docB);
			
			//如果对海量数据进行创建索引的时候，需要对索引进行优化，以便提高速度
			writer.optimize();
			
			//跟数据库类似，打开一个连接，使用完后，要关闭它
			writer.close();
		} catch (CorruptIndexException e) {
			e.printStackTrace();
		} catch (LockObtainFailedException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

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