5

编辑：我找到了解决办法：编辑core.jar，删除除codec包之外的所有包并添加到构建路径，codec包必须在jar中，不能是源码看不懂，这个很Lucene 的简单代码，它与 Lucene 核心库一起运行，但是当我使用 Lucene 核心源时会导致错误。

public static void main(String[] args) throws IOException, ParseException {
    Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_CURRENT);

    // Store the index in memory:
    Directory directory = new RAMDirectory();
    // To store an index on disk, use this instead:
    // Directory directory = FSDirectory.open("/tmp/testindex");
    IndexWriterConfig config = new IndexWriterConfig(
            Version.LUCENE_CURRENT, analyzer);
    IndexWriter iwriter = new IndexWriter(directory, config);
    Document doc = new Document();
    String text = "This is the text to be indexed.";
    doc.add(new Field("fieldname", text, TextField.TYPE_STORED));
    iwriter.addDocument(doc);
    iwriter.close();

    // Now search the index:
    DirectoryReader ireader = DirectoryReader.open(directory);
    IndexSearcher isearcher = new IndexSearcher(ireader);
    // Parse a simple query that searches for "text":
    QueryParser parser = new QueryParser(Version.LUCENE_CURRENT,
            "fieldname", analyzer);
    Query query = parser.parse("text");
    ScoreDoc[] hits = isearcher.search(query, null, 1000).scoreDocs;
    // Iterate through the results:
    for (int i = 0; i < hits.length; i++) {
        Document hitDoc = isearcher.doc(hits[i].doc);
                System.out.println(hitDoc.get("fieldname"));
    }
    ireader.close();
    directory.close();
}

错误是：

 Exception in thread "main" java.lang.ExceptionInInitializerError
        at org.apache.lucene.index.LiveIndexWriterConfig.<init>(LiveIndexWriterConfig.java:118)
        at org.apache.lucene.index.IndexWriterConfig.<init>(IndexWriterConfig.java:145)
        at Test.main(Test.java:34)
    Caused by: java.lang.IllegalArgumentException: A SPI class of type org.apache.lucene.codecs.Codec with name 'Lucene40' does not exist. You need to add the corresponding JAR file supporting this SPI to your classpath.The current classpath supports the following names: []
        at org.apache.lucene.util.NamedSPILoader.lookup(NamedSPILoader.java:104)
        at org.apache.lucene.codecs.Codec.forName(Codec.java:95)
        at org.apache.lucene.codecs.Codec.<clinit>(Codec.java:122)
        ... 3 more
4

1 回答 1

0

您必须将 Lucene jar 添加到类路径中。

如果这不起作用，请将 jar 复制到您的索引目录中，例如

java -cp app/luke/lukeall-4.0-dev.jar org.apache.lucene.index.CheckIndex data/solr/cores/collection1_0/data/index/

解压后的 web 应用中的一些 jar 是为战争定制的，没有自己的 MANIFEST 目录。Luke jar 有代码，是一个独立的 jar。

也可以看看：

如何在 LWE2.1 中执行 CheckIndex

于 2013-04-10T11:13:22.863 回答