Java tutorial
package org.apache.lucene.search; /** * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.io.BufferedReader; import java.io.File; import java.io.IOException; import java.io.InputStreamReader; import org.apache.commons.lang.StringUtils; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.document.Document; import org.apache.lucene.index.IndexReader; import org.apache.lucene.queryParser.QueryParser; import org.apache.lucene.search.IndexSearcher; import org.apache.lucene.search.Query; import org.apache.lucene.search.ScoreDoc; import org.apache.lucene.search.Searcher; import org.apache.lucene.search.TopDocCollector; public class SearchFiles { private static String queryString; private static final String INDEX_DIR = "C:/Java/tomcat_vzdncore_1/index"; //Where index files save. private SearchFiles() { } public static void main(String[] args) throws Exception { String usage = "Usage:\tjava org.apache.lucene.demo.SearchFiles [-field f] [-raw] [-paging hitsPerPage]"; usage += "\n\tSpecify 'false' for hitsPerPage to use streaming instead of paging search."; if (args.length > 0 && ("-h".equals(args[0]) || "-help".equals(args[0]))) { System.out.println(usage); System.exit(0); } String field = "contents"; boolean raw = false; boolean paging = true; int hitsPerPage = 100; for (int i = 0; i < args.length; i++) { if ("-field".equals(args[i])) { field = args[i + 1]; i++; } else if ("-raw".equals(args[i])) { raw = true; } else if ("-paging".equals(args[i])) { if (args[i + 1].equals("false")) { paging = false; } else { hitsPerPage = Integer.parseInt(args[i + 1]); if (hitsPerPage == 0) { paging = false; } } i++; } } IndexReader reader = IndexReader.open(INDEX_DIR); Searcher searcher = new IndexSearcher(reader); Analyzer analyzer = new StandardAnalyzer(SearchUtil.SMART_STOP_WORDS); QueryParser parser = new QueryParser(field, analyzer); BufferedReader in = new BufferedReader(new InputStreamReader(System.in, "UTF-8")); while (true) { System.out.println("Enter query: "); String line = in.readLine(); if (line == null || line.length() == -1) break; line = line.trim(); if (line.length() == 0) break; queryString = line; Query query = parser.parse(line); System.out.println("Searching for: " + query.toString(field)); doPagingSearch(in, searcher, query, hitsPerPage, raw); } reader.close(); } /** * This demonstrates a typical paging search scenario, where the search engine presents * pages of size n to the user. The user can then go to the next page if interested in * the next hits. * * When the query is executed for the first time, then only enough results are collected * to fill 5 result pages. If the user wants to page beyond this limit, then the query * is executed another time and all hits are collected. * */ public static void doPagingSearch(BufferedReader in, Searcher searcher, Query query, int hitsPerPage, boolean raw) throws IOException { // Collect enough docs to show 5 pages TopDocCollector collector = new TopDocCollector(5 * hitsPerPage); searcher.search(query, collector); ScoreDoc[] hits = collector.topDocs().scoreDocs; int numTotalHits = collector.getTotalHits(); System.out.println(numTotalHits + " total matching documents"); int start = 0; int end = Math.min(numTotalHits, hitsPerPage); SearchUtil searchUtil = new SearchUtil(); 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; } collector = new TopDocCollector(numTotalHits); searcher.search(query, collector); hits = collector.topDocs().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); try { searchUtil.parse(new File(path)); } catch (InterruptedException e) { e.printStackTrace(); } /*String title = doc.get("title"); if (title != null) { System.out.println(" Title: " + doc.get("title")); }*/ String title = SearchUtil.getTitle(searchUtil.getContents()); String contents = SearchUtil.removeTitle(searchUtil.getContents(), title); contents = SearchUtil.removeJspTags(contents); contents = SearchUtil.removeDirty(contents, "\"", "/>", 2); contents = SearchUtil.removeDirty(contents, "\"", "\">", 2); contents = StringUtils.remove(contents, "\" >"); contents = SearchUtil.removeDirty(contents, "[", "]", 1); contents = StringUtils.replace(contents, " ", ""); contents = StringUtils.replace(contents, "", ""); contents = StringUtils.replace(contents, "", ""); contents = StringUtils.replace(contents, "Back To Top", ""); contents = StringUtils.replace(contents, "Learn More", ""); contents = StringUtils.replace(contents, "View Here", ""); contents = StringUtils.replace(contents, "Submit App", ""); String displayStr = SearchUtil.createDisplayStr(contents, queryString); displayStr = SearchUtil.highlightSearchWord(displayStr, queryString); System.out.println(" title: " + title); System.out.println(" contents: " + contents); System.out.println(" displayStr: " + displayStr); } else { System.out.println((i + 1) + ". " + "No path for this document"); } System.out.println("================================================================"); } 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); } } } }