Question

我正在使用Lucene 3.6。我想知道为什么更新不起作用。有什么不对吗？

public class TokenTest
{
    private static String IndexPath = "D:\\update\\index";

    private static Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_33);

    public static void main(String[] args) throws Exception
    {

        try
        {

            update();

            display("content", "content");

        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }

    @SuppressWarnings("deprecation")
    public static void display(String keyField, String words) throws Exception
    {
        IndexSearcher searcher = new IndexSearcher(FSDirectory.open(new File(IndexPath)));
        Term term = new Term(keyField, words);
        Query query = new TermQuery(term);
        TopDocs results = searcher.search(query, 100);

        ScoreDoc[] hits = results.scoreDocs;

        for (ScoreDoc hit : hits)
        {

            Document doc = searcher.doc(hit.doc);
            System.out.println("doc_id = " + hit.doc);
            System.out.println("内容: " + doc.get("content"));
            System.out.println("路径:" + doc.get("path"));

        }
    }

    public static String update() throws Exception
    {

        IndexWriterConfig writeConfig = new IndexWriterConfig(Version.LUCENE_33, analyzer);

        IndexWriter writer = new IndexWriter(FSDirectory.open(new File(IndexPath)), writeConfig);

        Document document = new Document();

        Field field_name2 = new Field("path", "update_path", Field.Store.YES, Field.Index.ANALYZED);
        Field field_content2 = new Field("content", "content update", Field.Store.YES, Field.Index.ANALYZED);

        document.add(field_name2);
        document.add(field_content2);

        Term term = new Term("path", "qqqqq");

        writer.updateDocument(term, document);
        writer.optimize();
        writer.close();
        return "update_path";
    }

}

Answer 1

我假设您要更新您的文档，以便该字段＆＃34;路径＆＃34; =＆＃34; qqqq＆＃34;。你完全倒退了（ please read the documentation ）。

updateDocument执行两个步骤：

查找并删除包含term的所有文件
- 在这种情况下，找不到任何内容，因为您的索引文档不包含path:qqqq
将新的document添加到索引。

您似乎正在做相反的事情，尝试按文档查找，然后将该术语添加到其中，并且它不会以这种方式工作。我相信，你所寻找的是：

Term term = new Term("content", "update");

document.removeField("path");
document.add("path", "qqqq");

writer.updateDocument(term, document);

lucene updateDocument不起作用

1 个答案: