lucene 详细介绍 第一段（_lucenc简介和创建索引初步）

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Lucene-3.0.0配置

一、Lucene开发环境配置 step1.Lucene开发包下载 step2.Java开发环境配置 step3.Tomcat安装 step4.Lucene开发环境配置 解压下载的lucene-3.0.0.zip，可以看到lucene-core-3.0.0.jar和lucene-demos-3.0.0.jar这两个文件,将其解压(建议放在安装jdk的lib文件夹内)，并把路径添加到环境变量的classpath。

package com.sun.lucene;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.FieldSelectorResult;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
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.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.Version;


///我们创建一个简单的类进行学习
///前提是我们在使用要导入lucene jar 包
public class hellolucene {


// C创建索引
public void index() {
// 创建Directory
IndexWriter writer = null;
// Directory directory = new RAMDirectory();
try {
Directory directory = FSDirectory.open(new File(
"E:/Lucene/oneday/index0"));
// 创建 IndexWriter
IndexWriterConfig iwc = new IndexWriterConfig(Version.LUCENE_35,
new StandardAnalyzer(Version.LUCENE_35));


writer = new IndexWriter(directory, iwc);
// 创建Document 对象
Document doc = null;
File f = new File("E:/Lucene/oneday/example");
for (File file : f.listFiles()) {
doc = new Document();
doc.add(new Field("content", new FileReader(file)));
doc.add(new Field("filename", file.getName(),
Field.Store.YES, Field.Index.NOT_ANALYZED));
doc.add(new Field("path", file.getAbsolutePath(),
Field.Store.YES, Field.Index.NOT_ANALYZED));
writer.addDocument(doc);
}


// / 为document 对象添加Field
// / 通过indexwriter添加文档索引


} catch (Exception e) {
e.printStackTrace();


} finally {
if (writer!= null)
try {
writer.close();
} catch (CorruptIndexException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}


}


// /创建索引搜索
public void Searcher() {
// 创建Directory
Directory directory;
try {
directory = FSDirectory.open(new File("E:/Lucene/oneday/index0"));
// 创建 IndexReader 读取要搜索的文件或相关信息
IndexReader reader = IndexReader.open(directory);
// 创建 根据IndexReader 创建 Indexsearcher
IndexSearcher searcher = new IndexSearcher(reader);
// 创建 Query
// 创建Parser ;来确定搜索文件的内容 和搜索的文件域
QueryParser parser = new QueryParser(Version.LUCENE_35, "content",
new StandardAnalyzer(Version.LUCENE_35));
Query query = parser.parse("hosts");
// 根据seacher 返回topdoc
TopDocs tds = searcher.search(query, 10);
// 根据 topdoc 获取scordDoc
ScoreDoc[] sds = tds.scoreDocs;
for (ScoreDoc sd : sds) {
// 根据 seacher 和scoredDoc 获取document 对象信息
Document d = searcher.doc(sd.doc);
// 根据Document 获取相应的对象值
System.out.println(d.get("path") + "" + d.get("filename"));
}
} catch (Exception e) {
e.getStackTrace();


}
// 关闭Reader


}


}
public class Test{
@Test


 public void Text(){
  hellolucene  ge = new hellolucene();
  ge.index();
   
 }
  @Test
 public void TextSearcher(){
 hellolucene  ge = new hellolucene();
  ge.index();
  ge.Searcher();
 }


}

转载于:https://my.oschina.net/sunzy/blog/97936