- package com.lucene;
- 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.index.IndexWriter;
- import org.apache.lucene.index.Term;
- import org.apache.lucene.queryParser.QueryParser;
- import org.apache.lucene.search.Hits;
- import org.apache.lucene.search.IndexSearcher;
- import org.apache.lucene.search.Query;
- public class UpdateDocument {
- private static String path = "d:/index";
- public static void main(String[] args){
- // addIndex();
- updateIndex();
- search("李四");
- search("王五");
- }
- public static void addIndex(){
- try {
- IndexWriter write = new IndexWriter(path,new StandardAnalyzer(),true);
- Document doc = new Document();
- doc.add(new Field("id","123456",Field.Store.YES,Field.Index.UN_TOKENIZED));
- doc.add(new Field("userName","张三",Field.Store.YES,Field.Index.TOKENIZED));
- doc.add(new Field("comefrom","北京",Field.Store.YES,Field.Index.TOKENIZED));
- write.addDocument(doc);
- write.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- public static void updateIndex(){
- try {
- IndexWriter write = new IndexWriter(path,new StandardAnalyzer(),false);
- Document docNew = new Document();
- docNew.add(new Field("id","123456",Field.Store.YES,Field.Index.UN_TOKENIZED));
- docNew.add(new Field("userName","王五",Field.Store.YES,Field.Index.TOKENIZED));
- Term term = new Term("id","123456");
- /**
- 调用updateDocument的方法,传给它一个新的doc来更新数据,
- Term term = new Term("id","1234567");
- 先去索引文件里查找id为1234567的Doc,如果有就更新它(如果有多条,最后更新后只有一条)。如果没有就新增.
- 数据库更新的时候,我们可以只针对某个列来更新,而lucene只能针对一行数据更新。
- */
- write.updateDocument(term, docNew);
- write.close(); //注意在这里一定要关闭write
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- public static Query queryParser(String str){
- QueryParser queryParser = new QueryParser("userName", new StandardAnalyzer());
- try {
- Query query = queryParser.parse(str);
- return query;
- } catch (Exception e) {
- e.printStackTrace();
- }
- return null;
- }
- public static void search(String str){
- try {
- IndexSearcher search = new IndexSearcher(path);
- Query query = queryParser(str);
- Hits hits = search.search(query);
- if(hits==null){
- return;
- }
- if(hits.length() == 0){
- System.out.println(" 没有搜索到'" + str+"'");
- return;
- }
- for (int i = 0; i < hits.length(); i++) {
- Document doc = hits.doc(i);
- System.out.println("id = "+hits.id(i));
- System.out.println("own id = " + doc.get("id"));
- System.out.println("userName = "+doc.get("userName"));
- System.out.println("come from = "+doc.get("comefrom"));
- System.out.println("");
- }
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }