lucene对数据库建立索引

package com.mysqindex;import java.io.File;import java.io.IOException;import java.util.Iterator;import java.util.LinkedList;import java.util.Map;import java.util.Map.Entry;import org.apache.lucene.analysis.Analyzer;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.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.ScoreDoc;import org.apache.lucene.store.Directory;import org.apache.lucene.store.FSDirectory;import org.apache.lucene.util.Version;import org.wltea.analyzer.lucene.IKAnalyzer;import com.mysql.MySql;public class MysqlIndex {//对博客内容创建索引public static boolean buildBlogIndex(final Analyzer analyzer, final Directory directory, String selectsql, final int num){try {IndexWriter indexWriter = new IndexWriter(directory, new IndexWriterConfig(Version.LUCENE_47, analyzer));indexWriter.deleteAll();int begin = 0;String selectsql2 = selectsql;selectsql2 += " limit " + begin + "," + num;//读取表里面指定的内容Map<String,String> map = MySql.selectBlogData(selectsql2);while(map.size() != 0){Iterator it = map.entrySet().iterator();while(it.hasNext()){Document doc = new Document();Map.Entry<String, String> entry = (Entry<String, String>) it.next();doc.add(new Field("id", entry.getKey(), TextField.TYPE_STORED));doc.add(new Field("content", entry.getValue(), TextField.TYPE_NOT_STORED ));indexWriter.addDocument(doc);}selectsql2 = selectsql;begin += num;selectsql2 += " limit " + (begin-1) + "," + num;//indexWriter.close();map = MySql.selectBlogData(selectsql2);}indexWriter.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();return false;}return true;}//根据关键字进行搜索public static LinkedList<String> searchBlogIndex(final Analyzer analyzer, final Directory directory, final String keyword, final int score) {        DirectoryReader ireader = null;        LinkedList<String> list = new LinkedList<String>();        try {            // 打开索引存储            ireader = DirectoryReader.open(directory);            IndexSearcher isearcher = new IndexSearcher(ireader);            QueryParser par1 = new QueryParser(Version.LUCENE_47,"content",analyzer);            Query query = par1.parse(keyword);            //设置评分靠前的score条数据            ScoreDoc[] hits = isearcher.search(query, null, score).scoreDocs;            for (int i = 0; i < hits.length; i++) {                Document hitDoc = isearcher.doc(hits[i].doc);                //得到查询数据的内容               // System.out.println(hitDoc.get("content")+ " +++++++++++++++++++");                //得到查询数据的地址                list.add(hitDoc.get("id"));               // System.out.println(hitDoc.get("id") );                //得到查询数据的题目                //System.out.println(hitDoc.get("title"));                  }        } catch (Exception e) {            e.printStackTrace();            return null;                    } finally {            try {                ireader.close();                directory.close();            } catch (IOException e) {            }        }      return list;    }public static void main(String []args){File indexFile = new File("c:/lucene");Analyzer analyzer = new IKAnalyzer();Directory directory;try {directory = FSDirectory.open(indexFile);String selectsql = "select * from blog";int num = 10;int score = 5;String keyword = "winnerspring是何许人也";buildBlogIndex(analyzer, directory,selectsql, num);searchBlogIndex(analyzer, directory, keyword, score);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}