【第三节】Lucene5文档域加权

javazx · 发表于 2016-6-20 14:49:36

1、源码
import java.nio.file.Paths;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.junit.Test;

public class IndexingTest2 {

private String ids[]={"1","2","3","4"};
private String authors[]={"Jack","Marry","John","Json"};
private String positions[]={"accounting","technician","salesperson","boss"};
private String titles[]={"Java is a good language.","Java is a cross platform language","Java powerful","You should learn java"};
private String contents[]={
         "If possible, use the same JRE major version at both index and search time.",
         "When upgrading to a different JRE major version, consider re-indexing. ",
         "Different JRE major versions may implement different versions of Unicode,",
         "For example: with Java 1.4, `LetterTokenizer` will split around the character U+02C6,"
};

private Directory dir;

/**
   * 获取IndexWriter实例
   * @return
   * @throws Exception
   */
private IndexWriter getWriter()throws Exception{
      Analyzer analyzer=new StandardAnalyzer(); // 标准分词器
      IndexWriterConfig iwc=new IndexWriterConfig(analyzer);
      IndexWriter writer=new IndexWriter(dir, iwc);
      return writer;
}

/**
   * 生成索引
   * @throws Exception
   */
@Test
public void index()throws Exception{
      dir=FSDirectory.open(Paths.get("D:\\lucene3"));
      IndexWriter writer=getWriter();
      for(int i=0;i<ids.length;i++){
         Document doc=new Document();
         doc.add(new StringField("id", ids, Field.Store.YES));4 n# [* p5 a3 K! w
         doc.add(new StringField("author",authors,Field.Store.YES));
( z9 c4 i  b- m9 I  j! j: _% k          doc.add(new StringField("position",positions,Field.Store.YES));
* b1 a1 |* j5 e4 J' X          // 加权操作. a2 y& p0 u9 j; c
         TextField field=new TextField("title", titles, Field.Store.YES);1 I: v" h$ a- _0 c- M% }7 }- v
         if("boss".equals(positions)){4 Z0 x& o6 \9 B+ C; t, ^
            field.setBoost(1.5f);( q" d7 ]" H$ X" D4 ?. R6 O
         }
  \7 m8 F( ^, E. v$ m4 R. m% g/ b          doc.add(field);
% B1 F# I; C: s, D) z4 q' i          doc.add(new TextField("content", contents, Field.Store.NO));
6 ], T7 n2 v* Q5 @# L: X          writer.addDocument(doc); // 添加文档8 p" x  Z  d. q, M+ v
      }* @+ B# K: f3 j: R8 e
      writer.close();
* m" m6 c3 Q% W6 a }
' k0 b1 v4 H. ^7 l" U" u1 I0 }% n7 c3 w0 R
/**
, V! t6 N/ W7 D# a    * 查询5 Z! w) `4 Z* [6 n
   * @throws Exception
" u% q0 w0 a% ^- f0 u) \4 |; M    */- S0 D. a) ?4 {9 |( z
@Test
4 `; j  T$ ]7 M4 D public void search()throws Exception{
+ x; [4 s* u* }$ l       dir=FSDirectory.open(Paths.get("D:\\lucene3"));
3 L: n7 N& y$ k* r# s! i# ^       IndexReader reader=DirectoryReader.open(dir);; q8 f2 ], c7 v  R# R* b
      IndexSearcher is=new IndexSearcher(reader);( s2 ~3 n; d- L( M8 K
      String searchField="title";
+ a' k5 \& P9 H       String q="java";, R5 W% x7 L. d. f& ^% L
      Term t=new Term(searchField,q);
: K+ b* d5 B6 H8 ]" A' Q! h       Query query=new TermQuery(t);: H* T  k5 g" g0 Q4 i) a* Z, G+ X
      TopDocs hits=is.search(query, 10);; C( A; N4 \; Q  ~
      System.out.println("匹配 '"+q+"'，总共查询到"+hits.totalHits+"个文档");
6 D0 {9 L; S1 G3 T       for(ScoreDoc scoreDoc:hits.scoreDocs){
4 r9 z; x1 K5 m2 A; ?7 L          Document doc=is.doc(scoreDoc.doc);
) T1 c1 I6 k; e" f0 d, Y$ V* o          System.out.println(doc.get("author"));. O; J$ Y& B' J- [* q' Y
      }
8 ^% u9 t9 @8 O) S4 w& x! C; O0 P       reader.close();
( J7 G; A1 h2 @0 ~' o }
" ~8 A5 H4 \. t) l7 k& M1 d9 J* w$ ]
}$ k. O  I* w, ], h7 z" Q7 V* B& s
1 b  h% c& b5 a4 B" o( I9 s: }! D
8 i1 y. H0 A# J
! W4 a. L# B" X: j0 i

学java来尚学堂 · 发表于 2016-10-29 14:14:51

看了那么多，还是觉得我参加的北京尚学堂的教的好。包教包会，而且毕业就有1W的工资在手。一起来学习吧

wwwfasss · 发表于 2016-10-30 12:24:00

java自学网给力亲测资源可以

		自动登录	找回密码
密码			立即注册

【第三节】Lucene5文档域加权

相关帖子

宣传达人

突出贡献

优秀版主

荣誉管理

论坛元老