Search from file Using Apache Lucene .
Version version = Version.LUCENE_45
StandardAnalyzer analyzer = new StandardAnalyzer(version)
RAMDirectory directory = new RAMDirectory()
IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_45,
analyzer);
IndexWriter writer = new IndexWriter(directory, config);
File f = new File(
"/home/vishal/Desktop/java program/IO/read_Ip_TO_Country/ip-to-country.csv");
FileReader fr = new FileReader(f);
BufferedReader br = new BufferedReader(fr);
String s = "";
while ((s = br.readLine()) != null) {
String[] str = s.split("\\s+");
// System.out.print(str.length);
Document document = new Document();
document.add(new TextField("country code 2", str[2], Field.Store.YES));
document.add(new TextField("country code 3", str[3], Field.Store.YES));
if (str.length > 5) {
document.add(new TextField("country Name", str[4] + " " + str[5],
Field.Store.YES));
} else {
document.add(new TextField("country Name", str[4], Field.Store.YES));
}
writer.addDocument(document);
}
writer.close();
QueryParser parser = new QueryParser(version, "country Name", analyzer);
Query query = parser.parse("INDIA");
int hitPerPage = 10;
IndexReader reader = DirectoryReader.open(directory);
IndexSearcher searcher = new IndexSearcher(reader);
TopScoreDocCollector collector = TopScoreDocCollector.create(
hitPerPage, true);
searcher.search(query, collector);
ScoreDoc[] hits = collector.topDocs().scoreDocs;
System.out.println("Found " + hits.length + " hits.");
for (int i = 0; i < hits.length; ++i) {
int docId = hits[i].doc;
Document d = searcher.doc(docId);
System.out.println((i + 1) + ". " + d.get("country code 2") + "\t"
+ d.get("country code 3"));
}
// reader can only be closed when there
// is no need to access the documents any more.
reader.close();
// <![CDATA[ function styleCode() { if (typeof disableStyleCode != 'undefined') { return; } var a = false; $('pre').each(function() { if (!$(this).hasClass('prettyprint')) { $(this).addClass('prettyprint'); a = true; } }); if (a) { prettyPrint(); } } $(function() {styleCode();}); // ]]> // <![CDATA[ function styleCode() { if (typeof disableStyleCode != 'undefined') { return; } var a = false; $('pre').each(function() { if (!$(this).hasClass('prettyprint')) { $(this).addClass('prettyprint'); a = true; } }); if (a) { prettyPrint(); } } $(function() {styleCode();}); // ]]>
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