學習lucene3.5時，做的一個小例子

在開始學習lucene時，在網上找到很多的例子，全部是早期的版本，在lucene3.5時，好多方法已不推薦使用，所以就自己寫了個例子，方便大家學習

1，創建一個實體類

package com.yutel.lucene;

public class ContactInfo {
	private int id;
	private String FirstName;
	private String LastName;
	public ContactInfo() {
	}
	public ContactInfo(int id, String firstName, String lastName) {
		this.id = id;
		FirstName = firstName;
		LastName = lastName;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getFirstName() {
		return FirstName;
	}
	public void setFirstName(String firstName) {
		FirstName = firstName;
	}
	public String getLastName() {
		return LastName;
	}
	public void setLastName(String lastName) {
		LastName = lastName;
	}
}

2，索引的操作類

package com.yutel.lucene;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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.index.CorruptIndexException;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.queryParser.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.FSDirectory;
import org.apache.lucene.util.Version;

public class ContactInfoSearcher {
	private static final File INDEX_DIR = new File("d:\\temp\\index");
	private static final Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_35);
	/**
	 * 在索引庫中進行查詢
	 * @param fieldName
	 * @param criteria
	 * @return
	 * @throws CorruptIndexException
	 * @throws IOException
	 * @throws ParseException
	 */
	public List<ContactInfo> search(String fieldName, String criteria)
			throws CorruptIndexException, IOException, ParseException {
		IndexReader reader = IndexReader.open(FSDirectory.open(INDEX_DIR));
		IndexSearcher searcher = new IndexSearcher(reader);
		List<ContactInfo> list = new ArrayList<ContactInfo>();
		try {
			Query query = buildQuery(fieldName, criteria);
			TopDocs topDocs = searcher.search(query, 10);
			int total = topDocs.totalHits;
			System.out.println("total=" + total);
			ScoreDoc[] scoreDocs = topDocs.scoreDocs;
			for (int i = 0; i < scoreDocs.length; i++) {
				Document doc = searcher.doc(scoreDocs[i].doc);
				ContactInfo info = new ContactInfo();
				info.setId(Integer.valueOf(doc.get("id")));
				info.setFirstName(doc.get("firstName"));
				info.setLastName(doc.get("lastName"));
				list.add(info);
			}
			return list;
		} finally {
			searcher.close();
		}
	}
	 /**
	  * 將聯繫方式添加到索引庫中
	  * @param list
	  * @throws IOException
	  */
	public void index(List<ContactInfo> list) throws IOException {
		IndexWriter writer = openIndexWriter();
		try {
			for (ContactInfo contact : list) {
				Document document = builderDocument(contact);
				writer.addDocument(document);
			}
		} finally {
			writer.close();
		}
	}

	private IndexWriter openIndexWriter() throws IOException {
		IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_35,
				analyzer);
		iwc.setOpenMode(OpenMode.CREATE);
		return new IndexWriter(FSDirectory.open(INDEX_DIR), iwc);
	}

	private Document builderDocument(ContactInfo contact) {
		Document document = new Document();
		Field id = new Field("id", String.valueOf(contact.getId()),
				Field.Store.YES, Field.Index.ANALYZED);
		Field firstName = new Field("firstName", contact.getFirstName(),
				Field.Store.YES, Field.Index.ANALYZED);
		Field lastName = new Field("lastName", contact.getLastName(),
				Field.Store.YES, Field.Index.ANALYZED);
		document.add(id);
		document.add(firstName);
		document.add(lastName);
		return document;
	}

	private Query buildQuery(String fieldName, String criteria)
			throws ParseException, CorruptIndexException, IOException {
		QueryParser parser = new QueryParser(Version.LUCENE_35, fieldName,
				analyzer);
		return parser.parse(criteria);
	}

}

3，測試類

package com.yutel.lucene;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.queryParser.ParseException;

public class ContactTest {

	public static void main(String[] args) {
		ContactTest t = new ContactTest();
		t.init();
		t.search();
	}

	public void search() {
		ContactInfoSearcher cis = new ContactInfoSearcher();
		try {
			List<ContactInfo> list = cis.search("lastName", "軍");
			if (list.size() > 0) {
				System.out.println("找到:" + list.size() + "個結果! ");
				for (ContactInfo info : list) {
					System.out.println("id=" + info.getId() + ",name="
							+ info.getFirstName() + info.getLastName());
				}
			} else {
				System.out.println("沒有找到結果");
			}
		} catch (CorruptIndexException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (ParseException e) {
			e.printStackTrace();
		}
	}

	public void init() {
		List<ContactInfo> list = new ArrayList<ContactInfo>();
		list.add(new ContactInfo(1, "孫", "定軍"));
		list.add(new ContactInfo(2, "袁", "亞軍"));
		list.add(new ContactInfo(3, "王", "明慧"));
		list.add(new ContactInfo(4, "王", "磊軍"));
		list.add(new ContactInfo(3, "陳", "曉稽"));
		list.add(new ContactInfo(3, "烏", "紅毅"));
		list.add(new ContactInfo(3, "李", "建英"));
		ContactInfoSearcher cis = new ContactInfoSearcher();
		try {
			cis.index(list);
			System.out.println("add complate");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}