lucene(全文搜索)_恢复/更新索引操作

项目结构大家可以先看看：lucene(全文搜索)_根据内容建立索引_源码下载 

索引的恢复/更新操作

/**
     * 把删除的索引进行恢复操作
     */
    public void recover() {
        IndexReader reader = null;
        try {
            // readOnly默认为true，要把readOnly设置为false
            reader = IndexReader.open(directory, false);
            reader.undeleteAll();
        } catch (CorruptIndexException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * 清空回收站,也就是不能够恢复数据啦
     */
    public void forceMerge() {
        IndexWriter writer = null;
        try {
            writer = new IndexWriter(directory,new IndexWriterConfig(Version.LUCENE_35,new StandardAnalyzer(Version.LUCENE_35)));
            writer.forceMergeDeletes();
        } catch (CorruptIndexException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (writer != null) {
                try {
                    writer.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    
    /**
     * 更新操作
     */
    public void update(){
        IndexWriter writer = null;
        try {
            writer = new IndexWriter(directory,new IndexWriterConfig(Version.LUCENE_35,new StandardAnalyzer(Version.LUCENE_35)));
            
            Document document = new Document();
            document.add(new Field("id", "11", Field.Store.YES,
                    Field.Index.NOT_ANALYZED_NO_NORMS));
            document.add(new Field("email", emails[0], Field.Store.YES,
                    Field.Index.NOT_ANALYZED));
            document.add(new Field("content", contents[0], Field.Store.YES,
                    Field.Index.ANALYZED));
            writer.updateDocument(new Term("id","1"), document);
        } catch (CorruptIndexException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (writer != null) {
                try {
                    writer.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

测试代码：

@Test
    public void testDelete(){
        LuceneUtil util = new LuceneUtil();
        System.out.println("删除前 =======");
        util.query();
        util.delete();
        System.out.println("删除后 =======");
        util.query();
    }
    
    @Test
    public void testRecover(){
        LuceneUtil util = new LuceneUtil();
        System.out.println("恢复前 ========");
        util.query();
        util.recover();
        System.out.println("恢复后 ========");
        util.query();
    }
    
    @Test
    public void testUpdate(){
        LuceneUtil util = new LuceneUtil();
        System.out.println("更新前 ========");
        util.query();
        util.update();
        System.out.println("更新后 ========");
        util.query();
    }

I'm Hongten