lucene2.9学习第一天
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2022-07-09 11:51:41
...
1.
package test;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriter.MaxFieldLength;
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Filter;
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 util.FileDocumentUtil;
public class Test01App {
static String FilePath = "G:\\workspace\\lucen\\data\\gpl3.0.txt";
static String IndexPath = "G:\\workspace\\lucen\\index";
Analyzer luceneAnalyzer = new StandardAnalyzer();
public static void main(String[] args) {
try{
Test01App t=new Test01App();
t.test01();
// t.test02("License");
}catch (Exception e) {
System.out.println("[Error]:"+e.getMessage());
}finally{
System.out.println("完毕!");
}
}
public void test01() throws Exception {
Document doc = FileDocumentUtil.toDocument(FilePath);
System.out.println("[create Index]=\t"+FilePath);
IndexWriter updateIndex = new IndexWriter(IndexPath, luceneAnalyzer,true, MaxFieldLength.LIMITED);
updateIndex.addDocument(doc);
updateIndex.optimize();
updateIndex.close();
}
/**
* 搜索keyWords资源
*
* @param keyWords
* @throws Exception
*/
public void test02(String keyWords) throws Exception {
System.out.println("[查询关键字]=\t'" + keyWords+"'");
/* 设置查询字段 */
String[] fild = new String[]{"name", "content"};
/* Step1:keyWords解析成为 使于查询的Query对象 */
QueryParser queryParser = new MultiFieldQueryParser(fild,luceneAnalyzer);// 语法解析器
Query query = queryParser.parse(keyWords);
/* Step2:查询处理 */
IndexSearcher queryIndex = new IndexSearcher(IndexPath);
Filter filter = null;// 过滤器-为空就不过滤
TopDocs docs = queryIndex.search(query, filter, 10000);
/* Step3:输出内容 */
show(docs,queryIndex);
}
/**
* 显示结果
* @param docs
*/
public static void show(TopDocs docs,IndexSearcher query) throws Exception{
System.out.println("[查询结果]=\t" + docs.totalHits + "个.");
for (ScoreDoc doc : docs.scoreDocs) {
int docNo = doc.doc;// 文档编号
FileDocumentUtil.showDocument(query.doc(docNo));
}
}
}
2.
package util;
import java.io.File;
import java.io.Reader;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Field.Index;
import org.apache.lucene.document.Field.Store;
public class FileDocumentUtil {
public static Document document = null;
public static Document toDocument(String path) {
File file = new File(path);
document=new Document();
document.add(new Field("name",file.getName(),Store.YES,Index.ANALYZED));
document.add(new Field("content",read(file),Store.YES,Index.ANALYZED));
document.add(new Field("size",String.valueOf(file.length()),Store.YES,Index.ANALYZED));
document.add(new Field("path",file.getPath(),Store.NO,Index.ANALYZED));
return document;
}
private static String read(File file){
try{
List<String> list=FileUtils.readLines(file);
StringBuilder files=new StringBuilder();
for (String string : list) {
if(string!=null||StringUtils.isEmpty(string)){
files.append(string);
}
}
return files.toString();
}catch (Exception e) {
return "";
}
}
public static Document toDocument(File file) {
return toDocument(file.getPath());
}
/**
* 显示(打印)Document
* @param doc
*/
public static void showDocument(Document doc){
List<Field> list=doc.getFields();
for (Field field : list) {
System.out.println("[Document]");
System.out.println("[Field-"+field.name()+"]="+field.stringValue());
}
}
}
3.
[create Index]= G:\workspace\lucen\data\gpl3.0.txt
[查询关键字]= 'License'
[查询结果]= 1个.
[Document]
[Field-name]=gpl3.0.txt
[Document]
[Field-content]= GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The GNU General Public License is a free, copyleft license forsoftware and other kinds of works. The licenses for most software and other practical works are designedto take away your freedom to share and change the works. By contrast,the GNU General Public License is intended to guarantee your freedom toshare and change all versions of a program--to make sure it remains freesoftware for all its users. We, the Free Software Foundation, use theGNU General Public License for most of our software; it applies also toany other work released this way by its authors. You can apply it toyour programs, too. When we speak of free software, we are referring to freedom, notprice. Our General Public Licenses are designed to make sure that youhave the freedom to distribute copies of free software (and charge forthem if you wish), that you receive source code or can get it if youwant it, that you can change the software or use pieces of it in newfree programs, and that you know you can do these things. To protect your rights, we need to prevent others from denying youthese rights or asking you to surrender the rights. Therefore, you havecertain responsibilities if you distribute copies of the software, or ifyou modify it: responsibilities to respect the freedom of others. For example, if you distribute copies of such a program, whethergratis or for a fee, you must pass on to the recipients the samefreedoms that you received. You must make sure that they, too, receiveor can get the source code. And you must show them these terms so theyknow their rights. 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If the disclaimer of warranty and limitation of liability providedabove cannot be given local legal effect according to their terms,reviewing courts shall apply local law that most closely approximatesan absolute waiver of all civil liability in connection with theProgram, unless a warranty or assumption of liability accompanies acopy of the Program in return for a fee. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatestpossible use to the public, the best way to achieve this is to make itfree software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safestto attach them to the start of each source file to most effectivelystate the exclusion of warranty; and each file should have at leastthe "copyright" line and a pointer to where the full notice is found. <one line to give the program's name and a brief idea of what it does.> Copyright (C) <year> <name of author> This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.Also add information on how to contact you by electronic and paper mail. If the program does terminal interaction, make it output a shortnotice like this when it starts in an interactive mode: <program> Copyright (C) <year> <name of author> This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details.The hypothetical commands `show w' and `show c' should show the appropriateparts of the General Public License. Of course, your program's commandsmight be different; for a GUI interface, you would use an "about box". You should also get your employer (if you work as a programmer) or school,if any, to sign a "copyright disclaimer" for the program, if necessary.For more information on this, and how to apply and follow the GNU GPL, see<http://www.gnu.org/licenses/>. The GNU General Public License does not permit incorporating your programinto proprietary programs. If your program is a subroutine library, youmay consider it more useful to permit linking proprietary applications withthe library. If this is what you want to do, use the GNU Lesser GeneralPublic License instead of this License. But first, please read<http://www.gnu.org/philosophy/why-not-lgpl.html>.
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