package searchfileexample;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.index.IndexWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Date;
import org.apache.lucene.demo.FileDocument;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import java.io.FileReader;
import org.apache.lucene.index.*;
import java.text.DateFormat;
import org.apache.poi.hdf.extractor.WordDocument;
import java.io.InputStream;
import java.io.StringWriter;
import java.io.PrintWriter;
import java.io.FileInputStream;
import java.io.*;
import org.textmining.text.extraction.WordExtractor;
/**
* 給某個目錄下的所有文件生成索引
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2007</p>
* <p>Company: </p>
* @author not attributable
* @version 1.0
* 根據文件的不同，可以把索引文件創建到不同的文件夾下去，這樣可以分類保存索引信息。
*/
/** Index all text files under a directory. */
public class IndexFiles {
private IndexFiles() {}
static final File INDEX_DIR = new File("index");
/** Index all text files under a directory. */
public static void main(String[] args) {
String usage = "java org.apache.lucene.demo.IndexFiles <root_directory>";
//String[] arg = {"a","b"};
//System.out.println(arg[0]);
/*
if (args.length == 0) {
System.err.println("Usage: " + usage);
System.exit(1);
}*/
/*
if (INDEX_DIR.exists()) {
System.out.println("Cannot save index to '" +INDEX_DIR+ "' directory, please delete it first");
System.exit(1);
}*/
final File docDir = new File("a"); //需要生成索引的文件的文件夾
if (!docDir.exists() || !docDir.canRead()) {
System.out.println("Document directory '" + docDir.getAbsolutePath() +
"' does not exist or is not readable, please check the path");
System.exit(1);
}
Date start = new Date();
try {
IndexWriter writer = new IndexWriter(INDEX_DIR, new StandardAnalyzer(), true); //true-覆蓋原有的索引 false-不覆蓋原有的索引
System.out.println("Indexing to directory '" + INDEX_DIR + "'...");
indexDocs(writer, docDir);
System.out.println("Optimizing...");
writer.optimize();
writer.close();
Date end = new Date();
System.out.println(end.getTime() - start.getTime() +
" total milliseconds");
}
catch (IOException e) {
System.out.println(" caught a " + e.getClass() +
"\n with message: " + e.getMessage());
}
}
static void indexDocs(IndexWriter writer, File file) throws IOException {
// do not try to index files that cannot be read
if (file.canRead()) {
if (file.isDirectory()) {
String[] files = file.list();
// an IO error could occur
if (files != null) {
for (int i = 0; i < files.length; i++) {
indexDocs(writer, new File(file, files[i]));
}
}
}
else {
System.out.println("adding " + file);
try {
writer.addDocument(getDocument2(file, new FileInputStream(file)));
//writer.addDocument(parseFile(file));
//writer.addDocument(FileDocument.Document(file));//path 存放文件的相對路徑
}
// at least on windows, some temporary files raise this exception with an "access denied" message
// checking if the file can be read doesn't help
catch (Exception fnfe) {
;
}
}
}
}
/**
*@paramfile
*
*把File變成Document
*/
static Document parseFile(File file) throws Exception {
Document doc = new Document();
doc.add(new Field("path", file.getAbsolutePath(), Field.Store.YES,
Field.Index.UN_TOKENIZED)); //取文件的絕對路徑
try {
doc.add(new Field("contents", new FileReader(file))); //索引文件內容
doc.add(new Field("title", file.getName(), Field.Store.YES,
Field.Index.UN_TOKENIZED));
//索引最后修改時間
doc.add(new Field("modified",
String.valueOf(DateFormat.
getDateTimeInstance().format(new
Date(file.lastModified()))), Field.Store.YES,
Field.Index.UN_TOKENIZED));
//doc.removeField("title");
}
catch (Exception e) {
e.printStackTrace();
}
return doc;
}
/**
*@paramfile
*
*轉換word文檔
static String changeWord(File file) throws Exception {
String re = "";
try {
WordDocument wd = new WordDocument(is);
StringWriter docTextWriter = new StringWriter();
wd.writeAllText(new PrintWriter(docTextWriter));
docTextWriter.close();
bodyText = docTextWriter.toString();
} catch (Exception e) {
e.printStackTrace();
}
return re;
}*/
/**
*@paramfile
*
*使用POI讀取word文檔
*/
static Document getDocument(File file, FileInputStream is) throws Exception {
String bodyText = null;
try {
//BufferedReader wt = new BufferedReader(new InputStreamReader(is));
//bodyText = wt.readLine();
//System.out.println("word ===="+bodyText);
WordDocument wd = new WordDocument(is);
StringWriter docTextWriter = new StringWriter();
wd.writeAllText(new PrintWriter(docTextWriter));
bodyText = docTextWriter.toString();
docTextWriter.close();
// bodyText = new WordExtractor().extractText(is);
System.out.println("word content====" + bodyText);
}
catch (Exception e) {
;
}
if ( (bodyText != null)) {
Document doc = new Document();
doc.add(new Field("path", file.getAbsolutePath(), Field.Store.YES,
Field.Index.UN_TOKENIZED)); //取文件的絕對路徑
doc.add(new Field("contents", bodyText, Field.Store.YES,
Field.Index.TOKENIZED));
return doc;
}
return null;
}
//Document doc = getDocument(new FileInputStream(new File(file)));
/**
*@paramfile
*
*使用tm-extractors-0.4.jar讀取word文檔
*/
static Document getDocument2(File file, FileInputStream is) throws Exception {
String bodyText = null;
try {
//FileInputStream in = new FileInputStream("D:/lfy_programe/全文檢索/SearchFileExample/a/aa.doc");
// FileInputStream in = new FileInputStream ("D:/szqxjzhbase/技術測試/新建 Microsoft Word 文檔.doc");
WordExtractor extractor = new WordExtractor();
System.out.println(is.available());
bodyText = extractor.extractText(is);
// System.out.println("the result length is"+str.length());
System.out.println("word content===="+bodyText);
}
catch (Exception e) {
;
}
if ( (bodyText != null)) {
Document doc = new Document();
doc.add(new Field("path", file.getAbsolutePath(), Field.Store.YES,
Field.Index.UN_TOKENIZED)); //取文件的絕對路徑
doc.add(new Field("contents", bodyText, Field.Store.YES,
Field.Index.TOKENIZED));
return doc;
}
return null;
}
}
package searchfileexample;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.FilterIndexReader;
import org.apache.lucene.index.IndexReader;
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 java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Date;
import org.apache.lucene.analysis.SimpleAnalyzer;
import org.apache.lucene.analysis.KeywordAnalyzer;
import org.apache.lucene.analysis.WhitespaceAnalyzer;
import org.apache.lucene.document.Fieldable;
/** Simple command-line based search demo. */
public class SearchFiles {
/** Use the norms from one field for all fields. Norms are read into memory,
* using a byte of memory per document per searched field. This can cause
* search of large collections with a large number of fields to run out of
* memory. If all of the fields contain only a single token, then the norms
* are all identical, then single norm vector may be shared. */
private static class OneNormsReader extends FilterIndexReader {
private String field;
public OneNormsReader(IndexReader in, String field) {
super(in);
this.field = field;
}
public byte[] norms(String field) throws IOException {
return in.norms(this.field);
}
}
private SearchFiles() {}
/** Simple command-line based search demo. */
public static void main(String[] arg) throws Exception {
String[] args = {"a","b"};
String usage =
"Usage: java org.apache.lucene.demo.SearchFiles [-index dir] [-field f] [-repeat n] [-queries file] [-raw] [-norms field]";
if (args.length > 0 && ("-h".equals(args[0]) || "-help".equals(args[0]))) {
System.out.println(usage);
System.exit(0);
}
String index = "index";//該值是用來存放生成的索引文件的文件夾的名稱，不能改動
String field = "contents";//不能修改 field 的值
String queries = null;//是用來存放需要檢索的關鍵字的一個文件。
queries = "D:/lfy_programe/全文檢索/SearchFileExample/aa.txt";
int repeat = 1;
boolean raw = false;
String normsField = null;
for (int i = 0; i < args.length; i++) {
if ("-index".equals(args[i])) {
index = args[i+1];
i++;
} else if ("-field".equals(args[i])) {
field = args[i+1];
i++;
} else if ("-queries".equals(args[i])) {
queries = args[i+1];
i++;
} else if ("-repeat".equals(args[i])) {
repeat = Integer.parseInt(args[i+1]);
i++;
} else if ("-raw".equals(args[i])) {
raw = true;
} else if ("-norms".equals(args[i])) {
normsField = args[i+1];
i++;
}
}
IndexReader reader = IndexReader.open(index);
if (normsField != null)
reader = new OneNormsReader(reader, normsField);
Searcher searcher = new IndexSearcher(reader);//用來打開索引文件
Analyzer analyzer = new StandardAnalyzer();//分析器
//Analyzer analyzer = new StandardAnalyzer();
BufferedReader in = null;
if (queries != null) {
in = new BufferedReader(new FileReader(queries));
} else {
in = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
}
QueryParser parser = new QueryParser(field, analyzer);
while (true) {
if (queries == null) // prompt the user
System.out.println("Enter query: ");
String line = in.readLine();//組成查詢關鍵字字符串
System.out.println("查詢字符串==="+line);
if (line == null || line.length() == -1)
break;
line = line.trim();
if (line.length() == 0)
break;
Query query = parser.parse(line);
System.out.println("Searching for: " + query.toString(field));//每個關鍵字
Hits hits = searcher.search(query);
if (repeat > 0) { // repeat & time as benchmark
Date start = new Date();
for (int i = 0; i < repeat; i++) {
hits = searcher.search(query);
}
Date end = new Date();
System.out.println("Time: "+(end.getTime()-start.getTime())+"ms");
}
System.out.println("查詢到：" + hits.length() + " 個含有 ["+query.toString(field)+"]的文檔");
final int HITS_PER_PAGE = 10;//查詢返回的最大記錄數
int currentNum = 2;//當前記錄數
for (int start = 0; start < hits.length(); start += HITS_PER_PAGE) {
//start = start + currentNum;
int end = Math.min(hits.length(), start + HITS_PER_PAGE);
for (int i = start; i < end; i++) {
//if (raw) { // output raw format
System.out.println("doc="+hits.id(i)+" score="+hits.score(i));//score是接近度的意思
//continue;
//}
Document doc = hits.doc(i);
String path = doc.get("path");
if (path != null) {
System.out.println((i+1) + ". " + path);
String title = doc.get("title");
System.out.println(" modified: " + doc.get("modified"));
if (title != null) {
System.out.println(" Title: " + doc.get("title"));
}
} else {
System.out.println((i+1) + ". " + "No path for this document");
}
}
if (queries != null) // non-interactive
break;
if (hits.length() > end) {
System.out.println("more (y/n) ? ");
line = in.readLine();
if (line.length() == 0 || line.charAt(0) == 'n')
break;
}
}
}
reader.close();
}
}
package searchfileexample;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import org.textmining.text.extraction.WordExtractor;
public class ReadWord extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
//Initialize global variables
public void init() throws ServletException {
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType(CONTENT_TYPE);
FileInputStream in = new FileInputStream ("D:/lfy_programe/全文檢索/SearchFileExample/a/aa.doc");
// FileInputStream in = new FileInputStream ("D:/szqxjzhbase/技術測試/新建 Microsoft Word 文檔.doc");
WordExtractor extractor = new WordExtractor();
System.out.println(in.available());
String str = null;
try {
str = extractor.extractText(in);
}
catch (Exception ex) {
}
// System.out.println("the result length is"+str.length());
System.out.println(str);
}
//Clean up resources
public void destroy() {
}
}
1.英文的模糊查詢問題
查詢時的關鍵字的后邊加上通配符 " * " 就可以了。
2.IndexFiles.java
用來索引文件的java類
3.SearchFiles.java
用來搜索的java類
4.ReadWord.java
使用tm-extractors-0.4.jar來讀取word文件