調整Lucene搜索結果得分按重量特定字段同名

Question

我目前使用Lucene作爲我們的全文搜索引擎。但是我們需要根據特定的字段對搜索結果進行排序。

例如，如果我們的索引中包含以下三個文檔，其中除了id字段之外的內容都完全相同。

val document01 = new Document() 
    val field0100 = new Field("id", "1", Field.Store.YES, Field.Index.ANALYZED) 
    val field0101 = new Field("contents", "This is a test: Linux", Field.Store.YES, Field.Index.ANALYZED) 
    val field0102 = new Field("contents", "This is a test: Windows", Field.Store.YES, Field.Index.ANALYZED) 
    document01.add(field0100) 
    document01.add(field0101) 
    document01.add(field0102) 

    val document02 = new Document() 
    val field0200 = new Field("id", "2", Field.Store.YES, Field.Index.ANALYZED) 
    val field0201 = new Field("contents", "This is a test: Linux", Field.Store.YES, Field.Index.ANALYZED) 
    val field0202 = new Field("contents", "This is a test: Windows", Field.Store.YES, Field.Index.ANALYZED) 
    document02.add(field0200) 
    document02.add(field0201) 
    document02.add(field0202) 

    val document03 = new Document() 
    val field0300 = new Field("id", "3", Field.Store.YES, Field.Index.ANALYZED) 
    val field0301 = new Field("contents", "This is a test: Linux", Field.Store.YES, Field.Index.ANALYZED) 
    val field0302 = new Field("contents", "This is a test: Windows", Field.Store.YES, Field.Index.ANALYZED) 
    document03.add(field0300) 
    document03.add(field0301) 
    document03.add(field0302) 

現在，當我使用IndexSearcher的搜索Linux，我得到了以下結果：

Document<stored,indexed,tokenized<id:1> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 
Document<stored,indexed,tokenized<id:2> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 
Document<stored,indexed,tokenized<id:3> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 

當我搜索Windows，我得到相同的排序相同的結果。

Document<stored,indexed,tokenized<id:1> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 
Document<stored,indexed,tokenized<id:2> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 
Document<stored,indexed,tokenized<id:3> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 

問題是可以在構建索引時權重特定的字段嗎？例如，如果匹配搜索時，我想讓field0201得分較高。

換句話說，當我搜索Linux，我想得到的結果按以下順序：

Document<stored,indexed,tokenized<id:2> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 
Document<stored,indexed,tokenized<id:1> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 
Document<stored,indexed,tokenized<id:3> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 

當我搜索Windows，它仍然是原來的排序，如下所示：

Document<stored,indexed,tokenized<id:1> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 
Document<stored,indexed,tokenized<id:2> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 
Document<stored,indexed,tokenized<id:3> stored,indexed,tokenized<contents:This is a test: Linux> stored,indexed,tokenized<contents:This is a test: Windows>> 

我試着用field0201.setBoost()，但它會改變搜索排序的結果既當我搜索Linux或Windows。

Answer 1

我認爲應該有可能的，如果你把你的數據不同的來源不同的名稱字段。您可以在索引時設置一個提升，但如果您使用相同的名稱，我認爲提升將適用於具有相同名稱的所有字段 - 基於setBoost javadoc。所以，如果你這樣做，而不是：

val field0201 = new Field("content-high", "This is a test: Linux", ...) 
field0201.setBoost(1.5f) 
val field0202 = new Field("content-low", "This is a test: Windows", ...) 

然後用content-high:Linux content-low:Linux查詢（使用布爾查詢有兩個應條款均設置爲長期Linux的），然後含量高升壓應加大如果匹配在該字段中，則文檔得分。使用explain看看是否有效。