/** 通过改变boost的值来改变文档的得分* 在这个例子中Doc3的得分是最少的，* 加入我想把doc3的得分变高，，把他放到网页的第一条，* 那么就是用doc3.setBoost(2f);方法就可以实现* */package score;import java.io.IOException;import org.apache.lucene.analysis.standard.StandardAnalyzer;import org.apache.lucene.document.Document;import org.apache.lucene.document.Field;import org.apache.lucene.document.Field.Index;import org.apache.lucene.index.IndexWriter;import org.apache.lucene.index.Term;import org.apache.lucene.search.Hits;import org.apache.lucene.search.IndexSearcher;import org.apache.lucene.search.TermQuery;public class ChangeBoost{public ChangeBoost(String INDEX_STORE_PATH){try{IndexWriter writer = new IndexWriter(INDEX_STORE_PATH, new StandardAnalyzer(), true);writer.setUseCompoundFile(false);//创建3个文档Document doc1 = new Document();Document doc2 = new Document();Document doc3 = new Document();Field f1 = new Field("bookname", "ab bc", Field.Store.YES, Index.TOKENIZED);Field f2 = new Field("bookname", "ab bc cd", Field.Store.YES, Index.TOKENIZED);Field f3 = new Field("bookname", "ab bc de ff gg ss", Field.Store.YES, Index.TOKENIZED);doc1.add(f1);doc2.add(f2);doc3.add(f3);writer.addDocument(doc1);writer.addDocument(doc2);doc3.setBoost(2f);writer.addDocument(doc3);writer.close();IndexSearcher searcher = new IndexSearcher(INDEX_STORE_PATH);TermQuery q = new TermQuery(new Term("bookname", "bc"));Hits hits = searcher.search(q);for(int i = 0; i < hits.length(); i++){Document doc = hits.doc(i);//与之匹配的文档System.out.println(doc.get("bookname") + "\t\t");//文档所得分数System.out.println(hits.score(i));//这里通过解释的方法，来了解这个分数是怎么回事System.out.println(searcher.explain(q, hits.id(i)).toString());}}catch(IOException e){e.printStackTrace();}}public static void main(String[] args) {// TODO Auto-generated method stubChangeBoost cb = new ChangeBoost("E:\\Lucene项目\\索引文件");}
}
改变前的截图：
加上处理后截图：
便觉不过如此。也许我们只是想让自己的心去旅行，
