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1、lucene.apache.org6 A5 t; v3 C/ l/ t
2、5.3.1版本
& }: L) Q1 P6 J3、源码:4 ]+ m" k7 Q ~1 Y
(0)pom:
% v# I3 }4 J' g) Z. L<dependency>& [( ^1 h8 P: H8 b: C, x
<groupId>org.apache.lucene</groupId>
3 C; ~* r( Z3 s) H0 [ <artifactId>lucene-core</artifactId>2 x1 X" h) Q0 B4 d
<version>5.3.1</version>2 B. M9 z9 l: v' H
</dependency>
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<dependency>
# p3 v% w* J; I& X. e: \+ ] <groupId>org.apache.lucene</groupId>0 ~1 h( ~) ?+ S5 W( b9 H
<artifactId>lucene-queryparser</artifactId>
9 x6 W. e, t, m, Y9 s) }6 w/ ~5 K <version>5.3.1</version>6 d' X3 Q& Q9 V2 u8 A
</dependency>
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<dependency>
* I" O9 Y r% {3 R$ c/ O. z <groupId>org.apache.lucene</groupId>( x/ e- B6 |- G) p
<artifactId>lucene-analyzers-common</artifactId>$ y: o8 ]' a6 g: O
<version>5.3.1</version>
& ^1 B. n0 L" D: W </dependency>
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import java.io.File;" d9 {1 f! f+ K" K7 Q0 b! ^
import java.io.FileReader;: I: g- O( k' [) }, R N4 R& J: L
import java.nio.file.Paths;
- ]4 M5 P0 D: D; c4 L" x0 C: v+ W/ s' v6 Z5 p2 s' {
import org.apache.lucene.analysis.Analyzer;
- j; @) s& x8 w( f" p8 z, yimport org.apache.lucene.analysis.standard.StandardAnalyzer;4 I# ?7 S$ ?1 Z2 i8 ?( D
import org.apache.lucene.document.Document;4 ^$ ^! c2 `; K. L! p
import org.apache.lucene.document.Field;4 R. \0 n6 w5 \5 l; l) F
import org.apache.lucene.document.TextField;
; t9 e( ^0 l4 L% [& q& gimport org.apache.lucene.index.IndexWriter;% S9 `4 b3 [; e! @7 A
import org.apache.lucene.index.IndexWriterConfig;
/ m/ F: ]: f5 t1 pimport org.apache.lucene.store.Directory;
/ J# T2 n9 L/ D' G S! x' uimport org.apache.lucene.store.FSDirectory;
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: x8 Q0 e* y" _public class Indexer {
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( {. ]$ H, R$ Y+ d6 X private IndexWriter writer; // 写索引实例
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/**
8 v* `/ ?: l$ Y2 c * 构造方法 实例化IndexWriter' @7 a: f D6 f: N: q
* @param indexDir* z1 { G& G# x, A$ t
* @throws Exception
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public Indexer(String indexDir)throws Exception{
& z4 v6 D6 O3 w- i- w# q Directory dir=FSDirectory.open(Paths.get(indexDir));
# L# j, H; A. N1 [( o! p Analyzer analyzer=new StandardAnalyzer(); // 标准分词器
7 Y- G( k* d$ `8 [; t$ G7 C IndexWriterConfig iwc=new IndexWriterConfig(analyzer);. u1 |# x2 b% w
writer=new IndexWriter(dir, iwc);
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3 T( B/ F) M- t( F% E /**$ }8 z6 i1 h& b, V
* 关闭写索引/ n% x* |% W; i8 c% {# f
* @throws Exception
/ {. ?0 k; A* M5 m( U */
`8 X# e( N9 d5 u public void close()throws Exception{
: |8 Q, r% Z4 @3 W writer.close();
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/**
7 o) Q6 Y& B" c8 y4 `8 g; Q * 索引指定目录的所有文件1 n7 _- d. K1 h
* @param dataDir5 j0 }% x" K( H" H5 v8 f( d
* @throws Exception
) p9 _1 P+ m& X) f. @4 p. a */
" j& B' G& {! B1 S& C5 m public int index(String dataDir)throws Exception{( c5 W; s1 W( a
File []files=new File(dataDir).listFiles();
1 J1 J, P0 o, }5 e for(File f:files){- T# H3 d! |6 u N$ @
indexFile(f);: ]2 r6 k- z/ M" y
}
2 C x3 y! N5 {2 {3 q return writer.numDocs();
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/**
' }1 F6 q2 ~# e! u5 r * 索引指定文件- i: X1 |* ^( G
* @param f
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private void indexFile(File f) throws Exception{6 \, n* } P: j7 X1 x( x
System.out.println("索引文件:"+f.getCanonicalPath());) o3 W5 o+ j6 A8 `( n
Document doc=getDocument(f);9 d; `' E+ q6 M
writer.addDocument(doc);8 @+ e3 ^/ t6 u. c3 y: K5 I
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/**
. M' h5 @& E$ y# i0 g9 r, O& M) } * 获取文档,文档里再设置每个字段; a* |3 q* q) q+ z( _7 m& S
* @param f- j. O* v" C0 \+ h
*/
! X( H) U4 j1 A( W private Document getDocument(File f)throws Exception {
! S' Y2 `* O, K Document doc=new Document();+ T4 l' h$ F$ u* @( B( u9 h
doc.add(new TextField("contents",new FileReader(f)));9 i2 E1 c2 T0 z8 t1 p3 E
doc.add(new TextField("fileName", f.getName(),Field.Store.YES));
, U, H' E/ C/ ^: [ doc.add(new TextField("fullPath",f.getCanonicalPath(),Field.Store.YES));" h M0 x) C8 g, E/ [' f( J; i- p
return doc;! Z; b% R+ |5 }6 S. `& ?
}
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7 a. h$ @6 V# w% L+ N/ H- { public static void main(String[] args) {7 v/ I1 Y) L- h S d: |
String indexDir="D:\\lucene";
* p6 g g2 b# x K String dataDir="D:\\lucene\\data";( p# r3 U+ M- _3 |) [5 t
Indexer indexer=null;, d. Y+ Y3 U1 w
int numIndexed=0;7 J a9 [; X+ g, l# t: Y. t$ D _
long start=System.currentTimeMillis();
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indexer = new Indexer(indexDir);- y0 ~0 e: Y+ S; E; Z9 {/ _
numIndexed=indexer.index(dataDir);( ]- |5 L' R, R6 i5 l3 ~- Y+ r
} catch (Exception e) {& m/ E$ ?( ?% [) o& O6 S4 Q7 Z g
// TODO Auto-generated catch block
]( N+ S; V I- V8 L e.printStackTrace();
% N1 S8 _& T( [2 _. z- D }finally{
) ]' [8 p2 u+ K! G& t6 U- r try {
# N1 ]4 \- F5 K: `" x2 Q indexer.close();0 L9 M0 e% x! u. M! N+ `* W3 m# L
} catch (Exception e) {; E$ A1 c6 K1 m
// TODO Auto-generated catch block
) K; B* X; ^ k; e$ S, }2 I e.printStackTrace();
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4 K" o2 e$ g/ y! {1 F long end=System.currentTimeMillis();
N! Z0 X# M0 Y System.out.println("索引:"+numIndexed+" 个文件 花费了"+(end-start)+" 毫秒");* R3 H4 J3 v0 X6 z$ W9 i
}
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(2)、查询:
- W4 M% }1 X, R5 G& aimport java.nio.file.Paths;
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import org.apache.lucene.analysis.Analyzer;4 t F3 @+ X* i5 X) h' b, g
import org.apache.lucene.analysis.standard.StandardAnalyzer;. X* c" ]4 u/ X. k: B! I/ c6 [* j
import org.apache.lucene.document.Document;, [* ]# q2 L: Y6 d& x
import org.apache.lucene.index.DirectoryReader;3 c' p6 W# I! D- y1 e
import org.apache.lucene.index.IndexReader;/ O, g ?! Y" J6 v9 C% w S
import org.apache.lucene.queryparser.classic.QueryParser;$ J! ?8 B8 z& F' h2 w: m
import org.apache.lucene.search.IndexSearcher;
, F/ ~ R) n Cimport org.apache.lucene.search.Query;, \+ \) X3 C# K! [- i
import org.apache.lucene.search.ScoreDoc;
& P* P# z9 p, I8 fimport org.apache.lucene.search.TopDocs;
8 N. `/ E+ z: e9 M9 J. W; limport org.apache.lucene.store.Directory;
$ Q3 v$ C; J- s2 nimport org.apache.lucene.store.FSDirectory;
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public class Searcher {$ ?7 p- ?2 |! V4 s/ M( }
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public static void search(String indexDir,String q)throws Exception{ t) O3 g7 M" R$ G
Directory dir=FSDirectory.open(Paths.get(indexDir));8 c) Q$ r6 {0 q5 ~. C4 S
IndexReader reader=DirectoryReader.open(dir);6 [; k% C J' g7 v
IndexSearcher is=new IndexSearcher(reader);0 h/ w |! q5 o
Analyzer analyzer=new StandardAnalyzer(); // 标准分词器
; X' C9 ]* n/ J- p2 I# [ QueryParser parser=new QueryParser("contents", analyzer);6 r1 V# u& ?9 P# H
Query query=parser.parse(q);
- b( x! X7 y- o0 V long start=System.currentTimeMillis();- J6 k, W8 c9 w" Y9 E/ H7 Q$ j3 ~
TopDocs hits=is.search(query, 10);! C8 ^9 u2 U. c8 J/ k: Q+ S7 a% Y
long end=System.currentTimeMillis();
5 \. w( n' S& {6 U0 P+ F. \ System.out.println("匹配 "+q+" ,总共花费"+(end-start)+"毫秒"+"查询到"+hits.totalHits+"个记录");
& V* ]1 b( W6 y' r/ x* c# h: L$ {/ ~# p for(ScoreDoc scoreDoc:hits.scoreDocs){0 [) q; n$ a F% o( ^' l6 w
Document doc=is.doc(scoreDoc.doc);$ f$ Z9 r/ D; \6 D6 ]- P# E7 m
System.out.println(doc.get("fullPath"));$ O" P- N; s$ f* {1 f6 O
}
* Q$ h; a6 P0 r* C- k reader.close();
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: A2 {: c5 S/ l3 i Q/ K public static void main(String[] args) {9 `& [( s1 z) W' l
String indexDir="D:\\lucene";
# h) `3 I/ I3 A' N String q="Zygmunt Saloni";
8 a# P; G0 C; M. X9 Q, J try {
! I f" K/ Y2 o: w5 O( U search(indexDir,q);. k- H6 T5 C/ }7 p1 ^+ S/ V5 q
} catch (Exception e) {
* J/ A+ p( v, f) ^ E // TODO Auto-generated catch block7 a+ p5 r" |( D& y( Q f
e.printStackTrace();
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}
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