lucene 新增 更新 删除索引

    private static final Version version = Version.LUCENE_4_9;
    private Directory directory = new RAMDirectory();
    private DirectoryReader ireader = null;
    private IndexWriter iwriter = null;
    private IKAnalyzer analyzer;
    //存放索引文件的位置,即索引库
    private String searchDir = "d:\\Test\\Index";

    private static File indexFile = null;   


/**
     * 新增索引
     */
    public void addIndex()throws Exception{
    indexFile = new File(searchDir);
    directory = FSDirectory.open(indexFile);  
        IndexWriterConfig iwConfig =  new IndexWriterConfig(version, getAnalyzer());
        iwConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
        iwriter = new IndexWriter(directory,iwConfig);
        Document doc = new Document();
        doc.add(new TextField("id", "1",Field.Store.YES));
        doc.add(new TextField("name", "王五",Field.Store.YES));
        iwriter.addDocument(doc);
        iwriter.close();
    }


/**
     * 更新索引
     */
    public void updateIndex(String id) throws Exception{
    indexFile = new File(searchDir);
    directory = FSDirectory.open(indexFile);  
        IndexWriterConfig iwConfig =  new IndexWriterConfig(version, getAnalyzer());
        iwConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
        iwriter = new IndexWriter(directory,iwConfig);
        ireader = DirectoryReader.open(FSDirectory.open(indexFile));
        
        Document doc = new Document();
        doc.add(new TextField("id", "183",Field.Store.YES));
        doc.add(new TextField("name", "王凯1",Field.Store.YES));
        //第一个参数是删除含有term的document,第二个参数是更新后的docume
    iwriter.updateDocument(new Term("id","183"), doc);
    iwriter.close();
    }


/**
     * 删除索引
     */
    public void deleteIndex(String id) throws Exception{
    indexFile = new File(searchDir);
    directory = FSDirectory.open(indexFile);  
        IndexWriterConfig iwConfig =  new IndexWriterConfig(version, getAnalyzer());
        iwConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
        iwriter = new IndexWriter(directory,iwConfig);
        
        ireader = DirectoryReader.open(FSDirectory.open(indexFile));
        
    Term term = new Term("id",id); //---精确查找,删除此纪录
   
    iwriter.deleteDocuments(term);
    iwriter.close();
    }

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