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Posted to general@lucene.apache.org by Nuno Lopes <ds...@gmail.com> on 2013/10/15 20:48:50 UTC
Fwd: Problem with output in the SearchFile example
Good Night,
I have the following data.txt:
-------txt---------------
Nuno Rui Sergio
Abraham
Diogo
Bela Nuno Rui
Rui
Nuno Sergio
----------------------------
I want to search the following string: Nuno. For this i used the example
provided by your website.
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Date;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
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.FSDirectory;
import org.apache.lucene.util.Version;
/** Simple command-line based search demo. */
public class SearchFiles {
private SearchFiles() {}
/** Simple command-line based search demo. */
public static void main(String[] args) throws Exception {
String usage =
"Usage:\tjava org.apache.lucene.demo.SearchFiles [-index dir]
[-field f] [-repeat n] [-queries file] [-query string] [-raw] [-paging
hitsPerPage]\n\nSee http://lucene.apache.org/core/4_1_0/demo/ for details.";
// args[0] ="Artigo de IE 8060152";
// String[] teste = null;
// teste[0]="artigo";
//System.out.println("--> "+args.length);
// if (teste.length > 0 && ("-h".equals(args[0]) ||
"-help".equals(args[0]))) {
// System.out.println(usage);
// System.exit(0);
// }
String index =
"C:\\Users\\javas\\Documents\\NetBeansProjects\\Brincadeira";
String field = "Nuno";
String queries = "data.txt";
int repeat = 0;
boolean raw = true;
String queryString = null;
int hitsPerPage = 10;
// for(int i = 0;i < teste.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 ("-query".equals(args[i])) {
// queryString = 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 ("-paging".equals(args[i])) {
// hitsPerPage = Integer.parseInt(args[i+1]);
// if (hitsPerPage <= 0) {
// System.err.println("There must be at least 1 hit per
page.");
// System.exit(1);
// }
// i++;
// }
// }
IndexReader reader = DirectoryReader.open(FSDirectory.open(new
File(index)));
IndexSearcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_45);
BufferedReader in = null;
if (queries != null) {
in = new BufferedReader(new InputStreamReader(new
FileInputStream(queries), "UTF-8"));
} else {
in = new BufferedReader(new InputStreamReader(System.in,
"UTF-8"));
}
QueryParser parser = new QueryParser(Version.LUCENE_45, field,
analyzer);
while (true) {
if (queries == null && queryString == null) {
// prompt the user
System.out.println("Enter query: ");
}
String line = queryString != null ? queryString : in.readLine();
if (line == null || line.length() == -1) {
break;
}
line = line.trim();
if (line.length() == 0) {
break;
}
System.out.println(line.toString());
Query query = parser.parse(line);
System.out.println("Searching for: " + query.toString(field));
if (repeat > 0) { // repeat & time as
benchmark
Date start = new Date();
for (int i = 0; i < repeat; i++) {
searcher.search(query, null, 100);
}
Date end = new Date();
System.out.println("Time:
"+(end.getTime()-start.getTime())+"ms");
}
doPagingSearch(in, searcher, query, hitsPerPage, raw, queries ==
null && queryString == null);
if (queryString != null) {
break;
}
}
reader.close();
}
/**
139 * This demonstrates a typical paging search scenario, where the
search engine presents
140 * pages of size n to the user. The user can then go to the next
page if interested in
141 * the next hits.
142 *
143 * When the query is executed for the first time, then only enough
results are collected
144 * to fill 5 result pages. If the user wants to page beyond this
limit, then the query
145 * is executed another time and all hits are collected.
146 *
147 */
public static void doPagingSearch(BufferedReader in, IndexSearcher
searcher, Query query,
int hitsPerPage, boolean raw,
boolean interactive) throws IOException {
// Collect enough docs to show 5 pages
TopDocs results = searcher.search(query, 5 * hitsPerPage);
ScoreDoc[] hits = results.scoreDocs;
int numTotalHits = results.totalHits;
System.out.println(numTotalHits + " total matching documents");
int start = 0;
int end = Math.min(numTotalHits, hitsPerPage);
while (true) {
if (end > hits.length) {
System.out.println("Only results 1 - " + hits.length +" of " +
numTotalHits + " total matching documents collected.");
System.out.println("Collect more (y/n) ?");
String line = in.readLine();
if (line.length() == 0 || line.charAt(0) == 'n') {
break;
}
hits = searcher.search(query, numTotalHits).scoreDocs;
}
end = Math.min(hits.length, start + hitsPerPage);
for (int i = start; i < end; i++) {
if (raw) { // output raw format
System.out.println("doc="+hits[i].doc+"
score="+hits[i].score);
continue;
}
Document doc = searcher.doc(hits[i].doc);
String path = doc.get("path");
if (path != null) {
System.out.println((i+1) + ". " + path);
String title = doc.get("title");
if (title != null) {
System.out.println(" Title: " + doc.get("title"));
}
} else {
System.out.println((i+1) + ". " + "No path for this
document");
}
}
if (!interactive || end == 0) {
break;
}
if (numTotalHits >= end) {
boolean quit = false;
while (true) {
System.out.print("Press ");
if (start - hitsPerPage >= 0) {
System.out.print("(p)revious page, ");
}
if (start + hitsPerPage < numTotalHits) {
System.out.print("(n)ext page, ");
}
System.out.println("(q)uit or enter number to jump to a
page.");
String line = in.readLine();
if (line.length() == 0 || line.charAt(0)=='q') {
quit = true;
break;
}
if (line.charAt(0) == 'p') {
start = Math.max(0, start - hitsPerPage);
break;
} else if (line.charAt(0) == 'n') {
if (start + hitsPerPage < numTotalHits) {
start+=hitsPerPage;
}
break;
} else {
int page = Integer.parseInt(line);
if ((page - 1) * hitsPerPage < numTotalHits) {
start = (page - 1) * hitsPerPage;
break;
} else {
System.out.println("No such page");
}
}
}
if (quit) break;
end = Math.min(numTotalHits, start + hitsPerPage);
}
}
}
}
My problem is that the output said that 0 matches were found when should
return 3.
Can you help me please.
Best regardings,
Nuno Sérgio Lopes.