Question

编辑：我找到了解决方案：编辑core.jar，删除除codec包之外的所有包并添加到构建路径，编解码包必须在jar中，不能是源代码我无法理解，这是Lucene的非常简单的代码，它与Lucene核心lib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

Answer 1

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/

解压缩的网络应用程序中的一些罐子是为战争定制的，并且没有自己的MANIFEST目录。卢克的罐子里有代码，是一个独立的jar。

另见：

How Do I Execute CheckIndex In LWE2.1

错误简单示例lucene 4.0 with source（not jar lib）

1 个答案: