我的生成索引的类如下:其中index里有1.txt,2.txt,3.txt
package ceshi;import java.io.IOException;
import java.io.StringReader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.standard.StandardAnalyzer; import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.Date;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
/** */ /**
* author lighter date 2006-8-7
*/
public class TextFileIndexer {
public static void main(String[] args) throws Exception {
/**/ /* 指明要索引文件夹的位置,这里是C盘的S文件夹下 */
// File fileDir = new File( " c:/s" );
String filePath1="c:/s/";
filePath1=filePath1.toString();//中文转换
java.io.File fileDir=new java.io.File(filePath1);
/**/ /* 这里放索引文件的位置 */
String filePath2="c:/index1/";
filePath2=filePath2.toString();//中文转换
java.io.File indexDir=new java.io.File(filePath2); // File indexDir = new File( " c:/index" );
System.out.println("are you ok?");
Analyzer luceneAnalyzer = new StandardAnalyzer();
IndexWriter indexWriter = new IndexWriter(indexDir, luceneAnalyzer,true );
System.out.println("perhaps ok?");
File[] textFiles = fileDir.listFiles();
long startTime = new Date().getTime();
System.out.println(textFiles.length);
// 增加document到索引去
for ( int i = 0 ; i < textFiles.length; i ++ ) {
System.out.println("seems ok?");
if(textFiles[i].isFile() ){
System.out.println("it is a file!");
}
if(textFiles[i].getName().endsWith( " .txt " )){
System.out.println("it is a txt file!!!");
}
if (textFiles[i].isFile()) {
System.out.println("is here coming?");
System.out.println( " File " + textFiles[i].getCanonicalPath()
+ " 正在被索引.... " );
String temp = FileReaderAll(textFiles[i].getCanonicalPath(),
"utf-8" );
System.out.println(temp);
Document document = new Document();
Field FieldPath = new Field( " path " , textFiles[i].getPath(),
Field.Store.YES, Field.Index.NO);
Field FieldBody = new Field( " body " , temp, Field.Store.YES,
Field.Index.TOKENIZED,
Field.TermVector.WITH_POSITIONS_OFFSETS);
document.add(FieldPath);
document.add(FieldBody);
indexWriter.addDocument(document);
}
}
// optimize()方法是对索引进行优化
indexWriter.optimize();
indexWriter.close();
// 测试一下索引的时间
long endTime = new Date().getTime();
System.out
.println( " 这花费了 "
+ (endTime - startTime)
+ " 毫秒来把文档增加到索引里面去! "
+ fileDir.getPath());
}
public static String FileReaderAll(String FileName, String charset)
throws IOException {
BufferedReader reader = new BufferedReader( new InputStreamReader(
new FileInputStream(FileName), charset));
String line = new String();
String temp = new String();
while ((line = reader.readLine()) != null ) {
temp += line;
}
reader.close();
return temp;
}
} 查找索引的类如下:
package sample.dw.paper.lucene.search;import java.io.IOException; import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.queryParser.ParseException;
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.store.FSDirectory;
public class TestQuery {
public static void main(String[] args) throws IOException, ParseException {
Hits hits = null;
String queryString = "ok";
Query query = null;
IndexSearcher searcher = new IndexSearcher("c:\\index1");
Analyzer analyzer = new StandardAnalyzer();
QueryParser qp = new QueryParser("body", analyzer);
try {
query = qp.parse(queryString);
// 以下 是评分机制 的代码.等看懂这个例子后,可以把注销代码删了
// hits = searcher.search(query);
// for(int i=0;i<hits.length();i++){
// Explanation explanation = searcher.explain(query,hits.id(i));
// System.out.println("得分"+hits.score(i));
// System.out.println("具体情况"+explanation);
// System.out.println("长度"+hits.length());
//
// }
} catch (org.apache.lucene.queryParser.ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (searcher != null) {
hits = searcher.search(query);
if (hits.length() > 0) {
System.out.println("找到:" + hits.length() + " 个结果!");
}
else{
System.out.print("没有找到!!!!!!!!");
}
}
}
}
但是,控制台一直打印出找不到,请各位帮我看看是怎么回事啊
package ceshi;import java.io.IOException;
import java.io.StringReader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.standard.StandardAnalyzer; import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.Date;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
/** */ /**
* author lighter date 2006-8-7
*/
public class TextFileIndexer {
public static void main(String[] args) throws Exception {
/**/ /* 指明要索引文件夹的位置,这里是C盘的S文件夹下 */
// File fileDir = new File( " c:/s" );
String filePath1="c:/s/";
filePath1=filePath1.toString();//中文转换
java.io.File fileDir=new java.io.File(filePath1);
/**/ /* 这里放索引文件的位置 */
String filePath2="c:/index1/";
filePath2=filePath2.toString();//中文转换
java.io.File indexDir=new java.io.File(filePath2); // File indexDir = new File( " c:/index" );
System.out.println("are you ok?");
Analyzer luceneAnalyzer = new StandardAnalyzer();
IndexWriter indexWriter = new IndexWriter(indexDir, luceneAnalyzer,true );
System.out.println("perhaps ok?");
File[] textFiles = fileDir.listFiles();
long startTime = new Date().getTime();
System.out.println(textFiles.length);
// 增加document到索引去
for ( int i = 0 ; i < textFiles.length; i ++ ) {
System.out.println("seems ok?");
if(textFiles[i].isFile() ){
System.out.println("it is a file!");
}
if(textFiles[i].getName().endsWith( " .txt " )){
System.out.println("it is a txt file!!!");
}
if (textFiles[i].isFile()) {
System.out.println("is here coming?");
System.out.println( " File " + textFiles[i].getCanonicalPath()
+ " 正在被索引.... " );
String temp = FileReaderAll(textFiles[i].getCanonicalPath(),
"utf-8" );
System.out.println(temp);
Document document = new Document();
Field FieldPath = new Field( " path " , textFiles[i].getPath(),
Field.Store.YES, Field.Index.NO);
Field FieldBody = new Field( " body " , temp, Field.Store.YES,
Field.Index.TOKENIZED,
Field.TermVector.WITH_POSITIONS_OFFSETS);
document.add(FieldPath);
document.add(FieldBody);
indexWriter.addDocument(document);
}
}
// optimize()方法是对索引进行优化
indexWriter.optimize();
indexWriter.close();
// 测试一下索引的时间
long endTime = new Date().getTime();
System.out
.println( " 这花费了 "
+ (endTime - startTime)
+ " 毫秒来把文档增加到索引里面去! "
+ fileDir.getPath());
}
public static String FileReaderAll(String FileName, String charset)
throws IOException {
BufferedReader reader = new BufferedReader( new InputStreamReader(
new FileInputStream(FileName), charset));
String line = new String();
String temp = new String();
while ((line = reader.readLine()) != null ) {
temp += line;
}
reader.close();
return temp;
}
} 查找索引的类如下:
package sample.dw.paper.lucene.search;import java.io.IOException; import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.queryParser.ParseException;
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.store.FSDirectory;
public class TestQuery {
public static void main(String[] args) throws IOException, ParseException {
Hits hits = null;
String queryString = "ok";
Query query = null;
IndexSearcher searcher = new IndexSearcher("c:\\index1");
Analyzer analyzer = new StandardAnalyzer();
QueryParser qp = new QueryParser("body", analyzer);
try {
query = qp.parse(queryString);
// 以下 是评分机制 的代码.等看懂这个例子后,可以把注销代码删了
// hits = searcher.search(query);
// for(int i=0;i<hits.length();i++){
// Explanation explanation = searcher.explain(query,hits.id(i));
// System.out.println("得分"+hits.score(i));
// System.out.println("具体情况"+explanation);
// System.out.println("长度"+hits.length());
//
// }
} catch (org.apache.lucene.queryParser.ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (searcher != null) {
hits = searcher.search(query);
if (hits.length() > 0) {
System.out.println("找到:" + hits.length() + " 个结果!");
}
else{
System.out.print("没有找到!!!!!!!!");
}
}
}
}
但是,控制台一直打印出找不到,请各位帮我看看是怎么回事啊
public static void main(String[] args) throws IOException, ParseException {
Hits hits = null;
String queryString = "ok";
Query query = null;
IndexSearcher searcher = new IndexSearcher("c:\\index1");
Analyzer analyzer = new StandardAnalyzer();
QueryParser qp = new QueryParser("body", analyzer);
try {
query = qp.parse(queryString);
// 以下 是评分机制 的代码.等看懂这个例子后,可以把注销代码删了
// hits = searcher.search(query);
// for(int i=0;i<hits.length();i++){
// Explanation explanation = searcher.explain(query,hits.id(i));
// System.out.println("得分"+hits.score(i));
// System.out.println("具体情况"+explanation);
// System.out.println("长度"+hits.length());
//
// }
} catch (org.apache.lucene.queryParser.ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (searcher != null) {
hits = searcher.search(query);
if (hits.length() > 0) {
System.out.println("找到:" + hits.length() + " 个结果!");
}
else{
System.out.print("没有找到!!!!!!!!");
}
}
}
}
query 你根本没赋值,一直为NULL。 hits = searcher.search(query);这里你肯定得不到结果呀。
hits.length() > 0根本就不会实现。肯定会打印 "没有找到!!!!!!!!"咯。
hits = searcher.search(query);
if (hits.length() > 0) {
System.out.println("找到:" + hits.length() + " 个结果!");
}
else{
System.out.print("没有找到!!!!!!!!");
}
}
能打印"没有找到!!!!!!!!",说明进到这里去了。但是length>0不会实现。 你看看search()方法吧。
说明 hits = searcher.search(query); 可能是null。你打印下试试。