SOLR 创建索引与创建搜索步骤
创建索引1、创建Directory
2、创建IndexWriter
3、创建Document对象
4、为Document对象添加Field
5、通过IndexWriter添加Document对象到索引中
创建搜索
1、创建Directory
2、创建IndexReader
3、根据IndexReader创建IndexSearcher
4、创建搜索的query
5、根据searcher搜索并且创建TopDocs
6、根据TopDocs获取ScoreDoc对象
7、根据seacher和ScoreDoc对象获取具体的Document对象
8、根据Document对象获取需要的值
9、关闭Reader
创建索引
Java代码
[*]package com.langhua;
[*]
[*]import java.io.File;
[*]import java.io.FileReader;
[*]import java.io.IOException;
[*]import java.util.Date;
[*]
[*]import org.apache.lucene.analysis.standard.StandardAnalyzer;
[*]import org.apache.lucene.document.DateTools;
[*]import org.apache.lucene.document.Document;
[*]import org.apache.lucene.document.Field;
[*]import org.apache.lucene.index.IndexWriter;
[*]import org.apache.lucene.store.Directory;
[*]import org.apache.lucene.store.SimpleFSDirectory;
[*]import org.apache.lucene.util.Version;
[*]/**
[*] * 创建索引 Lucene 3.0+
[*] * @author Administrator
[*] *
[*] */
[*]public class Indexer {
[*]
[*] /**
[*] * @param args
[*] * @throws IOException
[*] */
[*] public static void main(String[] args) throws IOException {
[*] //保存索引文件的地方
[*] String indexDir = "F:\\indexDir";
[*] //将要搜索TXT文件的地方
[*] String dateDir = "F:\\dateDir";
[*] IndexWriter indexWriter = null;
[*] //创建Directory对象
[*] Directory dir = new SimpleFSDirectory(new File(indexDir));
[*] //创建IndexWriter对象,第一个参数是Directory,第二个是分词器,第三个表示是否是创建,如果为false为在此基础上面修改,第四表示表示分词的最大值，比如说new MaxFieldLength(2)，就表示两个字一分，一般用IndexWriter.MaxFieldLength.LIMITED
[*] indexWriter = new IndexWriter(dir,new StandardAnalyzer(Version.LUCENE_30),true,IndexWriter.MaxFieldLength.UNLIMITED);
[*] File[] files = new File(dateDir).listFiles();
[*] for (int i = 0; i < files.length; i++) {
[*] Document doc = new Document();
[*] //创建Field对象，并放入doc对象中
[*] doc.add(new Field("contents", new FileReader(files)));
[*] doc.add(new Field("filename", files.getName(),
[*] Field.Store.YES, Field.Index.NOT_ANALYZED));
[*] doc.add(new Field("indexDate",DateTools.dateToString(new Date(), DateTools.Resolution.DAY),Field.Store.YES,Field.Index.NOT_ANALYZED));
[*] //写入IndexWriter
[*] indexWriter.addDocument(doc);
[*] }
[*] //查看IndexWriter里面有多少个索引
[*] System.out.println("numDocs"+indexWriter.numDocs());
[*] indexWriter.close();
[*]
[*] }
[*]
[*]}
搜索索引 Lucene 3.0+
Java代码
[*]package com.langhua;
[*]
[*]import java.io.File;
[*]import java.io.IOException;
[*]
[*]import org.apache.lucene.analysis.standard.StandardAnalyzer;
[*]import org.apache.lucene.document.Document;
[*]import org.apache.lucene.queryParser.ParseException;
[*]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.SimpleFSDirectory;
[*]import org.apache.lucene.util.Version;
[*]/**
[*] * 搜索索引 Lucene 3.0+
[*] * @author Administrator
[*] *
[*] */
[*]public class Searcher {
[*]
[*] public static void main(String[] args) throws IOException, ParseException {
[*] //保存索引文件的地方
[*] String indexDir = "F:\\indexDir";
[*] Directory dir = new SimpleFSDirectory(new File(indexDir));
[*] //创建 IndexSearcher对象，相比IndexWriter对象，这个参数就要提供一个索引的目录就行了
[*] IndexSearcher indexSearch = new IndexSearcher(dir);
[*] //创建QueryParser对象,第一个参数表示Lucene的版本,第二个表示搜索Field的字段,第三个表示搜索使用分词器
[*] QueryParser queryParser = new QueryParser(Version.LUCENE_30,
[*] "contents", new StandardAnalyzer(Version.LUCENE_30));
[*] //生成Query对象
[*] Query query = queryParser.parse("langhua9527");
[*] //搜索结果 TopDocs里面有scoreDocs[]数组，里面保存着索引值
[*] TopDocs hits = indexSearch.search(query, 10);
[*] //hits.totalHits表示一共搜到多少个
[*] System.out.println("找到了"+hits.totalHits+"个");
[*] //循环hits.scoreDocs数据，并使用indexSearch.doc方法把Document还原，再拿出对应的字段的值
[*] for (int i = 0; i < hits.scoreDocs.length; i++) {
[*] ScoreDoc sdoc = hits.scoreDocs;
[*] Document doc = indexSearch.doc(sdoc.doc);
[*] System.out.println(doc.get("filename"));
[*] }
[*] indexSearch.close();
[*] }
[*]}
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