luncene RAMDirectory

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package com.robert.lucene;import org.apache.lucene.analysis.Analyzer;import org.apache.lucene.analysis.core.SimpleAnalyzer;import org.apache.lucene.document.Document;import org.apache.lucene.document.Field;import org.apache.lucene.document.TextField;import org.apache.lucene.index.DirectoryReader;import org.apache.lucene.index.IndexReader;import org.apache.lucene.index.IndexWriter;import org.apache.lucene.index.IndexWriterConfig;import org.apache.lucene.queryparser.classic.QueryParser;import org.apache.lucene.search.IndexSearcher;import org.apache.lucene.search.Query;import org.apache.lucene.search.SearcherFactory;import org.apache.lucene.search.TopDocs;import org.apache.lucene.store.Directory;import org.apache.lucene.store.RAMDirectory;import java.util.concurrent.Callable;/** * Created  on 15/8/21. */public class SearchArray {    public static void main(String[] args) {        try {            Directory directory = new RAMDirectory();            Analyzer analyzer = new SimpleAnalyzer();            IndexWriterConfig iwc = new IndexWriterConfig(analyzer);            IndexWriter writer = new IndexWriter(directory, iwc);            String[] docs = {              "a b c d e",              "a b c d e f g h",              "a b c d e f g h i j",              "a c e",              "e c a",              "a c e a c e",              "a c e a b c",            };            for (int j = 0; j < docs.length; ++j) {                Document d = new Document();                d.add(new TextField("contents", docs[j], Field.Store.YES));                writer.addDocument(d);            }            writer.close();            IndexReader reader = DirectoryReader.open(directory);            IndexSearcher indexSearcher = new IndexSearcher(reader);            //搜索contents字段            QueryParser parser = new QueryParser("contents", analyzer);            TopDocs topDocs = null;            String[] queries = {                    "a c e",                    "h i"            };            for( int j = 0; j < queries.length; ++j) {                Query query = parser.parse(queries[j]);                System.out.println(" query:" + query.toString("contents"));                topDocs = indexSearcher.search(query,100);                System.out.println("总共匹配多少个：" + topDocs.totalHits);                for(int i = 0; i < topDocs.totalHits; ++i) {                    Document d = indexSearcher.doc(topDocs.scoreDocs[i].doc);                    System.out.println(i + " " + topDocs.scoreDocs[i].score + d.get("contents"));                }                System.out.println("-------------");            }        } catch (Exception e) {        }    }}
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