使用Lucene荧光笔的问题 [英] Problems using Lucene Highlighter

问题描述

我在使用Lucene Highlighter 2.4.1作为我的应用程序。我使用荧光笔获得最佳的匹配片段，并显示它们。
我调用一个函数String [] getFragmentsWithHighlightedTerms（Analyzer analyzer，Query query，String fieldName，String fieldContents，int fragmentsNumber，int fragmentSize）。例如：

  String text = doc.get（MetaData）; 
 getFragmentsWithHighlightedTerms（analyzer，query，MetaData，Text，5,100）; 
  

函数getFragmentsWithHighlightedTerms（）定义如下

$
{
TokenStream stream = TokenSources.getTokenStream（fieldName，fieldContents，analyzer）;
SpanScorer scorer = new SpanScorer（query，fieldName，new CachingTokenFilter（stream））;
Fragmenter fragmenter = new SimpleSpanFragmenter（scorer，fragmentSize）;

荧光笔荧光笔=新的荧光笔（得分手）;
highlighter.setTextFragmenter（fragmenter）;
highlighter.setMaxDocCharsToAnalyze（Integer.MAX_VALUE）;

String [] fragments = highlighter.getBestFragments（stream，fieldContents，fragmentNumber）;

返回片段;
}

现在我的麻烦是，highlighter.getBestFragments（）方法返回重复。即，如果我显示前5个片段，否则。 1和3相同。我不太明白是什么原因造成的。代码有问题吗？

解决方案

我没有代码在我面前，但我认为你正在阵列阵列
所以你需要这样做：

  item [] = fragments [0] 
 fragment =项目[0] 
  

或者只是得到1个项目的片段数组。

I am using Lucene Highlighter 2.4.1 for my application. I use the highlighter to get the best matching fragments, and display them. I make a call to a function String[] getFragmentsWithHighlightedTerms(Analyzer analyzer, Query query, String fieldName, String fieldContents, int fragmentsNumber, int fragmentSize). For example :

String text = doc.get("MetaData");
getFragmentsWithHighlightedTerms(analyzer, query, "MetaData", Text, 5, 100);

The function getFragmentsWithHighlightedTerms() is defined as follows

private static String[] getFragmentsWithHighlightedTerms( argument list here)
{
    TokenStream stream = TokenSources.getTokenStream(fieldName, fieldContents, analyzer);
    SpanScorer scorer = new SpanScorer(query, fieldName, new CachingTokenFilter(stream));
    Fragmenter fragmenter = new SimpleSpanFragmenter(scorer, fragmentSize);

    Highlighter highlighter = new Highlighter(scorer);
    highlighter.setTextFragmenter(fragmenter);
    highlighter.setMaxDocCharsToAnalyze(Integer.MAX_VALUE);

    String[] fragments = highlighter.getBestFragments(stream, fieldContents, fragmentNumber);

    return fragments;
}

Now my trouble is that the highlighter.getBestFragments() method is returning duplicates. i.e, If i display say the first 5 fragments, no. 1 and 3 are same. I do not quite understand what is causing this. Is there a problem with the code?

解决方案

I dont have the code in front of me, but I think you are getting an array of arrays. So you would need to do this:

item[] = fragments[0]
fragment = item[0]

or just get 1 item out the fragments array.

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