Lucene创建索引与搜索索引试手

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由于仿写的源码的版本是Lucene2.1.0，我用的Lucene已经是4.5.0了，所以像创建IndexWriter、IndexSearcher的时候源码的已经不能用了，只好自己查api摸索，所以有个老师在旁边指导该多好。

首先我创建的是中文的索引。

CJKAnalyzer是：对中文汉字，每两个字作为一个词条

StandardAnalyzer是：单个汉字作为一个词条

所以如果要查询像：“大禹”这样俩个字的词条时，用CJKAnalyzer，查询像“水”这样的词条时，需要改用StandardAnalyzer。我在这里纠结了很久不知道哪里错了。

还有就是StringField和TextField的区别。api的解释分别是：

TextField：A field that is indexed and tokenized, without term vectors. For example this would be used on a 'body' field, that contains the bulk of a document's text.

StringField：A field that is indexed but not tokenized: the entire String value is indexed as a single token. For example this might be used for a 'country' field or an 'id' field, or any field that you intend to use for sorting or access through the field cache.

现在看看也没很多错的地方，但是写了仨小时。期间各种查api啊，还是那句话，有个老师指点一下的话，我就能少走很多弯路，节省很多时间了。唉。。。

package org.apache.lucene;import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.text.SimpleDateFormat;
import java.util.Date;import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;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.TextField;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;import com.wb.tool.FileList;
import com.wb.tool.FileText;public class LuceneIndexer {private JTextField jtfa;private JButton jba;private JTextField jtfb;private JButton jbb;private JButton jbc;private static JTextArea jta;private void createAndShowGUI(){// 设置跨平台外观感觉//String lf=UIManager.getCrossPlatformLookAndFeelClassName();//GTK//String lf="com.sun.java.swing.plaf.gtk.GTKLookAndFeel";//System//String lf=UIManager.getSystemLookAndFeelClassName();//windows//String lf="com.sun.java.swing.plaf.windows.WindowsLookAndFeel";//metal//String lf="javax.swing.plaf.metal.MetalLookAndFeel";/**common usetry{UIManager.setLookAndFeel(lf);}catch(Exception ce){JOptionPane.showMessageDialog(null,"无法设定外观感觉！");}**///Java感觉JFrame.setDefaultLookAndFeelDecorated(true);JFrame frame=new JFrame("TEST");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);final JFileChooser fc=new JFileChooser();fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);Container con= frame.getContentPane();	con.setLayout(new BorderLayout());JPanel jpup=new JPanel();jpup.setLayout(new GridLayout(3,2));jtfa=new JTextField(30);jba=new JButton("选择被索引的文件存放路径");jba.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){int r=fc.showOpenDialog(null);if(r==JFileChooser.APPROVE_OPTION){jtfa.setText(fc.getSelectedFile().getPath());jbc.setEnabled(true);}}	});jtfb=new JTextField(30);JButton jbb=new JButton("选择索引的存放路径");jbb.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){int r=fc.showOpenDialog(null);if(r==JFileChooser.APPROVE_OPTION){jtfb.setText(fc.getSelectedFile().getPath());jbc.setEnabled(true);}}	});JLabel jl=new JLabel("");jbc=new JButton("建立索引");jbc.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){try{LuceneIndexerTool.index(jtfa.getText(),jtfb.getText());//jbc.setEnabled(false);}catch(Exception ee){ee.printStackTrace();jbc.setEnabled(true);JOptionPane.showMessageDialog(null,"索引创建失败！");System.out.println(ee.getMessage());}}	});jpup.add(jtfa);jpup.add(jba);jpup.add(jtfb);jpup.add(jbb);jpup.add(jl);jpup.add(jbc);jta=new JTextArea(10,60);JScrollPane jsp=new JScrollPane(jta);con.add(jpup,BorderLayout.NORTH);con.add(jsp,BorderLayout.CENTER);frame.setSize(200,100);frame.pack();frame.setVisible(true);}public static void main(String[] args) {SwingUtilities.invokeLater(new Runnable() {public void run() {new LuceneIndexer().createAndShowGUI();}});}static class LuceneIndexerTool {public static void index(String filePath, String indexPath) throws IOException {Path path = Paths.get(indexPath);Directory dir = FSDirectory.open(path);Analyzer analyzer = new StandardAnalyzer();IndexWriterConfig config = new IndexWriterConfig(analyzer);IndexWriter writer = new IndexWriter(dir, config);String s[] = FileList.getFiles(filePath);int len = s.length;for(int i=0; i<len; i++) {File file = new File(s[i]);String ext = getExt(file);if((ext.equalsIgnoreCase("htm")) || (ext.equalsIgnoreCase("html"))) {Document doc = new Document();Field field;String fileName = file.getName();field = new TextField("fileName", fileName, Field.Store.YES);doc.add(field);String uri = file.getPath();field = new TextField("uri", uri, Field.Store.YES);doc.add(field);Date dt = new Date(file.lastModified());SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd");String date = sdf.format(dt);field = new TextField("date", date, Field.Store.YES);doc.add(field);double l = file.length();String size = "";if(l>1024)size = String.valueOf(Math.floor(l/1024)) + "K";elsesize = String.valueOf(size) + "Bytes";field = new TextField("size", size, Field.Store.YES);doc.add(field);String text = FileText.getText(file);field = new TextField("text", text, Field.Store.YES);doc.add(field);String digest = "";if(text.length() > 200)digest = text.substring(0, 200);elsedigest = text;field = new TextField("digest", digest, Field.Store.YES);doc.add(field);writer.addDocument(doc);jta.setText(jta.getText() + "已经加入索引：" + file + "\n");}}writer.close();}public static String getExt(File file) {String s = file.getName();s = s.substring(s.lastIndexOf(".") + 1);return s;}}}

</pre><pre name="code" class="java"><pre name="code" class="java">package org.apache.lucene;import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.file.Path;
import java.nio.file.Paths;import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;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.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.queryparser.classic.ParseException;
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;public class LuceneSearcher {private JTextField jtfa;private JButton jba;private JTextField jtfb;private JButton jbb;private JButton jbc;private static JTextArea jta;private JTextField jtfc;private JButton jbd;private JButton jbe;private void createAndShowGUI(){// 设置跨平台外观感觉//String lf=UIManager.getCrossPlatformLookAndFeelClassName();//GTK//String lf="com.sun.java.swing.plaf.gtk.GTKLookAndFeel";//System//String lf=UIManager.getSystemLookAndFeelClassName();//windows//String lf="com.sun.java.swing.plaf.windows.WindowsLookAndFeel";//metal//String lf="javax.swing.plaf.metal.MetalLookAndFeel";/**common usetry{UIManager.setLookAndFeel(lf);}catch(Exception ce){JOptionPane.showMessageDialog(null,"无法设定外观感觉！");}**///Java感觉JFrame.setDefaultLookAndFeelDecorated(true);JFrame frame=new JFrame("Tianen Searcher! yutianen@163.com");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);final JFileChooser fc=new JFileChooser();fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);Container con= frame.getContentPane();	con.setLayout(new BorderLayout());JPanel jpup=new JPanel();jpup.setLayout(new GridLayout(2,2));jtfa=new JTextField(30);jba=new JButton("选择索引的存放路径");jba.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){int r=fc.showOpenDialog(null);if(r==JFileChooser.APPROVE_OPTION){jtfa.setText(fc.getSelectedFile().getPath());}}	});jtfb=new JTextField(30);JButton jbb=new JButton("搜索");jbb.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){try{String indexPath=jtfa.getText();String phrase=jtfb.getText();new LuceneSearcherTool().search(phrase,indexPath);
System.out.println("123");}catch(Exception ex){JOptionPane.showMessageDialog(null,"搜索失败！","提示",JOptionPane.ERROR_MESSAGE);}}	});jpup.add(jtfa);jpup.add(jba);jpup.add(jtfb);jpup.add(jbb);jta=new JTextArea(10,30);	JScrollPane jsp=new JScrollPane(jta);JPanel jpdown=new JPanel();jpdown.setLayout(new FlowLayout());		jtfc=new JTextField(35);jbd=new JButton("设定导出路径");fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);jbd.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){int r=fc.showOpenDialog(null);if(r==JFileChooser.APPROVE_OPTION){jtfc.setText(fc.getSelectedFile().getPath());}}	});jbe=new JButton("导出搜索结果");jbe.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){try{File f=new File(jtfc.getText());FileWriter fw=new FileWriter(f);PrintWriter pw=new PrintWriter(fw);pw.write(jta.getText());pw.flush();pw.close();							JOptionPane.showMessageDialog(null,"写入文件成功！","提示",JOptionPane.INFORMATION_MESSAGE);}catch(IOException ioe){JOptionPane.showMessageDialog(null,"写入文件失败！","提示",JOptionPane.ERROR_MESSAGE);}}	});jpdown.add(jtfc);jpdown.add(jbd);jpdown.add(jbe);con.add(jpup,BorderLayout.NORTH);con.add(jsp,BorderLayout.CENTER);con.add(jpdown,BorderLayout.SOUTH);frame.setSize(200,100);frame.pack();frame.setVisible(true);}public static void main(String[] args) {SwingUtilities.invokeLater(new Runnable() {public void run() {new LuceneSearcher().createAndShowGUI();}});}static class LuceneSearcherTool {public void search(String phrase, String indexPath) throws IOException, ParseException {Path path = Paths.get(indexPath);Directory dir = FSDirectory.open(path);IndexReader ir = DirectoryReader.open(dir);IndexSearcher is = new IndexSearcher(ir);Analyzer analyzer = new StandardAnalyzer();QueryParser parser = new QueryParser("text", analyzer);Query query = parser.parse(phrase);TopDocs hits = is.search(query, 10);for(ScoreDoc scoreDoc: hits.scoreDocs) {Document doc = is.doc(scoreDoc.doc);if(doc == null)continue;Field field = (Field) doc.getField("fileName");String fileName = field.stringValue();field = (Field) doc.getField("uri");String uri = field.stringValue();field = (Field) doc.getField("date");String date = field.stringValue();field = (Field) doc.getField("digest");String digest = field.stringValue();StringBuffer sb = new StringBuffer();sb.append("URI：" + uri + "\n");sb.append("filename：" + fileName + "\n");sb.append("date：" + date + "\n");sb.append("digest：" + digest + "\n");sb.append("------------------------------------\n");jta.setText(jta.getText() + sb.toString());}ir.close();dir.close();}}}

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