Apache Lucene-使用简单介绍
package test;import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.LongField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.index.DirectoryReader;
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.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.usermodel.Range;
/**
* @author xinghl
*
*/
public class IndexManager{
private static IndexManager indexManager;
private static String content="";
private static String INDEX_DIR = "D:\\luceneIndex";
private static String DATA_DIR = "D:\\luceneData";
private static Analyzer analyzer = null;
private static Directory directory = null;
private static IndexWriter indexWriter = null;
/**
* 创建索引管理器
* @return 返回索引管理器对象
*/
public IndexManager getManager(){
if(indexManager == null){
this.indexManager = new IndexManager();
}
return indexManager;
}
/**
* 创建当前文件目录的索引
* @param path 当前文件目录
* @return 是否成功
*/
public static boolean createIndex(String path){
Date date1 = new Date();
List fileList = getFileList(path);
for (File file : fileList) {
content = "";
//获取文件后缀
String type = file.getName().substring(file.getName().lastIndexOf(".")+1);
if("txt".equalsIgnoreCase(type)){
content += txt2String(file);
}else if("doc".equalsIgnoreCase(type)){
content += doc2String(file);
}else if("xls".equalsIgnoreCase(type)){
content += xls2String(file);
}
System.out.println("name :"+file.getName());
System.out.println("path :"+file.getPath());
// System.out.println("content :"+content);
System.out.println();
try{
analyzer = new StandardAnalyzer(Version.LUCENE_CURRENT);
directory = FSDirectory.open(new File(INDEX_DIR));
File indexFile = new File(INDEX_DIR);
if (!indexFile.exists()) {
indexFile.mkdirs();
}
IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_CURRENT, analyzer);
indexWriter = new IndexWriter(directory, config);
Document document = new Document();
document.add(new TextField("filename", file.getName(), Store.YES));
document.add(new TextField("content", content, Store.YES));
document.add(new TextField("path", file.getPath(), Store.YES));
indexWriter.addDocument(document);
indexWriter.commit();
closeWriter();
}catch(Exception e){
e.printStackTrace();
}
content = "";
}
Date date2 = new Date();
System.out.println("创建索引-----耗时：" + (date2.getTime() - date1.getTime()) + "ms\n");
return true;
}
/**
* 读取txt文件的内容
* @param file 想要读取的文件对象
* @return 返回文件内容
*/
public static String txt2String(File file){
String result = "";
try{
BufferedReader br = new BufferedReader(new FileReader(file));//构造一个BufferedReader类来读取文件
String s = null;
while((s = br.readLine())!=null){//使用readLine方法，一次读一行
result = result + "\n" +s;
}
br.close();
}catch(Exception e){
e.printStackTrace();
}
return result;
}
/**
* 读取doc文件内容
* @param file 想要读取的文件对象
* @return 返回文件内容
*/
public static String doc2String(File file){
String result = "";
try{
FileInputStream fis = new FileInputStream(file);
HWPFDocument doc = new HWPFDocument(fis);
Range rang = doc.getRange();
result += rang.text();
fis.close();
}catch(Exception e){
e.printStackTrace();
}
return result;
}
/**
* 读取xls文件内容
* @param file 想要读取的文件对象
* @return 返回文件内容
*/
public static String xls2String(File file){
String result = "";
try{
FileInputStream fis = new FileInputStream(file);
StringBuilder sb = new StringBuilder();
jxl.Workbook rwb = Workbook.getWorkbook(fis);
Sheet[] sheet = rwb.getSheets();
for (int i = 0; i < sheet.length; i++) {
Sheet rs = rwb.getSheet(i);
for (int j = 0; j < rs.getRows(); j++) {
Cell[] cells = rs.getRow(j);
for(int k=0;k 0) {
return true;
}else if (fileName.lastIndexOf(".xls") > 0) {
return true;
}else if (fileName.lastIndexOf(".doc") > 0) {
return true;
}
return false;
}
public static void closeWriter() throws Exception {
if (indexWriter != null) {
indexWriter.close();
}
}
/**
* 删除文件目录下的所有文件
* @param file 要删除的文件目录
* @return 如果成功，返回true.
*/
public static boolean deleteDir(File file){
if(file.isDirectory()){
File[] files = file.listFiles();
for(int i=0; i
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