利用lucene_4.3索引搜索demo

lucene版本索引搜索的过程

package com.shentong.search;

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.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.FSDirectory;
import org.apache.lucene.util.Version;

public class TxtFileIndexSearchSimple {

public static void main(String[] args) {
String indexStorePos = "E:\\数据\\luceneindex";
String field = "contents";// 搜索索引的域名字
String queryString = "中国人";
int hitsPerPage = 10;//显示前50个
try {
IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(indexStorePos)));
IndexSearcher searcher = new IndexSearcher(reader);
Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_43);
QueryParser parser = new QueryParser(Version.LUCENE_43, field, analyzer);
Query query = parser.parse(queryString);
TopDocs results = searcher.search(query, 5 * hitsPerPage);
ScoreDoc[] hits = results.scoreDocs;
for(int i=0;i<hits.length;i++){
Document doc = searcher.doc(hits[i].doc);
System.out.println(doc.getField("path").stringValue());
}
System.out.println(hits.length);
}catch(Exception e){
System.out.println(e.getClass());
}
}

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);
}
}
}
}