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1、lucene.apache.org
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3、源码:
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5 M0 _( p5 X: }) G2 b+ z) p b4 M<dependency> h1 z5 J/ D: ~3 \% {: x
<groupId>org.apache.lucene</groupId>; [! B1 t9 M8 ? |- z
<artifactId>lucene-core</artifactId>
- y( k5 E+ H0 L9 Z; V& \ <version>5.3.1</version># N* Q0 \) m6 D4 G. c, z& V
</dependency>
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<dependency>
# T& d K, U& ^% `+ h- Q <groupId>org.apache.lucene</groupId>
% Y7 Z6 U# a6 u1 [. X" r6 p4 u2 s+ Q4 V# i <artifactId>lucene-queryparser</artifactId>
# E" P0 n( E' J2 R" A <version>5.3.1</version>: B# k" P3 r# L+ p1 J ]3 U K9 _- u
</dependency>; {3 q& J9 N+ U, d$ S. ~" s
: [4 u( i' i" l6 R5 u7 G <dependency>% [+ `5 U5 R9 X0 P
<groupId>org.apache.lucene</groupId>
. B( ?% p* T, J <artifactId>lucene-analyzers-common</artifactId>3 T6 I9 B. Z* K( S
<version>5.3.1</version>
b4 g( I" A+ v/ C2 w </dependency>
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- r. t1 O% y3 @7 `) j(1)写入:
0 w4 |3 K# L) F+ ]* x# J4 yimport java.io.File;
% D# r @2 s9 k) [! s6 l. C: ]( i5 y5 wimport java.io.FileReader;
, j% O$ p& b9 M6 K7 v, ?import java.nio.file.Paths;1 @, q" K4 x1 v9 e2 O9 m4 \
' L6 _, M5 y# M9 a4 Oimport org.apache.lucene.analysis.Analyzer;
' t; B, x4 L: wimport org.apache.lucene.analysis.standard.StandardAnalyzer;
+ E+ ?+ ?9 n7 `8 O+ C" vimport org.apache.lucene.document.Document;# k. a+ ~; \$ U& Q
import org.apache.lucene.document.Field;4 a; l1 G, ]2 ^. h W F7 e2 y* r3 Z
import org.apache.lucene.document.TextField;
0 b% J2 m# H% J) H* Rimport org.apache.lucene.index.IndexWriter;
; ?5 |- n1 m: x2 ]import org.apache.lucene.index.IndexWriterConfig;
+ q6 A+ Z8 g9 ]* O6 N1 |( f. limport org.apache.lucene.store.Directory;
9 I. r2 i) H( `$ e9 Z$ wimport org.apache.lucene.store.FSDirectory;
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6 f3 f1 H" B' q' |1 M9 qpublic class Indexer {
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private IndexWriter writer; // 写索引实例3 u9 [3 J8 @8 V7 U; K+ I
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* 构造方法 实例化IndexWriter
0 [& K. G$ `/ K% R& f8 C * @param indexDir9 p, f( `# Y( m; d+ P
* @throws Exception, C7 G: G, |0 q% b- G
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public Indexer(String indexDir)throws Exception{
4 Y0 e* g' o% g1 s4 l" i Directory dir=FSDirectory.open(Paths.get(indexDir));
1 X0 m- U) X' \* D Analyzer analyzer=new StandardAnalyzer(); // 标准分词器
( r, x7 l' R) |2 e4 M- v8 q/ H b IndexWriterConfig iwc=new IndexWriterConfig(analyzer);
. I% Y8 X( a1 h6 J% m writer=new IndexWriter(dir, iwc);
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/**$ x' O) h- s N) O( K) M2 i6 i
* 关闭写索引( G# R) p& d" K+ O5 z% p- m: u. O
* @throws Exception: v+ V; A) }% n0 n0 c/ ?
*/
3 D$ ]7 T5 U2 L O" r; l6 a5 o public void close()throws Exception{! W7 E7 P% @) _
writer.close();4 }2 S4 J5 k# n2 s1 g& o
}
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/**
! C6 `* B: o* ~1 _4 ~3 E: ]& h( c * 索引指定目录的所有文件. j9 G1 ~( u0 W( O4 a) Q& c4 f
* @param dataDir! ]' |! K x! m, Z0 d; ?; B7 O
* @throws Exception
# S0 q8 |$ q& Q */' E0 q8 w r9 v* o
public int index(String dataDir)throws Exception{: j& ^* i' A% Y5 |- l1 Q
File []files=new File(dataDir).listFiles();5 Q: w$ k2 V' H3 M, d7 f
for(File f:files){! X) b7 y/ R4 }/ s& U+ x- M5 ` ]# _
indexFile(f);
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return writer.numDocs();' {9 }- \% B! \2 S ^; f
}
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5 k/ O H9 o( R7 { /**
& n, \& j1 R3 w9 F$ r+ G6 G * 索引指定文件
2 ~7 R t: \9 { * @param f, s& ]% U% Z2 O* w* C; F$ a
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private void indexFile(File f) throws Exception{3 l6 v W; {$ r+ q7 z9 a$ K7 ~
System.out.println("索引文件:"+f.getCanonicalPath());
- t( d8 C; K- M+ y6 |3 _ Document doc=getDocument(f);
" M3 c |6 `* b writer.addDocument(doc);1 W0 g& G% j) E9 Q
}
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/**3 p- C& J x( P$ @- J0 L
* 获取文档,文档里再设置每个字段
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*/
- S* g: j0 }" ` D) P private Document getDocument(File f)throws Exception {+ U: W0 d% A% G; B
Document doc=new Document();# @' a# \+ P5 L
doc.add(new TextField("contents",new FileReader(f)));
( M, I; f9 |; }9 J doc.add(new TextField("fileName", f.getName(),Field.Store.YES));4 B; T- _1 q1 ]4 f- U W
doc.add(new TextField("fullPath",f.getCanonicalPath(),Field.Store.YES));6 ~$ b0 K: b0 E- X' L8 ^
return doc;
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public static void main(String[] args) {7 \* [3 F: ]; w4 j; X l% t" |
String indexDir="D:\\lucene"; X2 q8 T G: A. ?, B3 M n
String dataDir="D:\\lucene\\data";4 \5 e! X; E* c# {8 B
Indexer indexer=null;* Q- n1 ^- F9 E# J' W
int numIndexed=0;
$ E; i- C8 k% C+ I: S1 h, J long start=System.currentTimeMillis();% u0 L7 ~, A+ u
try {0 }6 o' R1 t" P% t- e% u" z
indexer = new Indexer(indexDir);
7 u$ C5 {2 E' I& v* r$ g numIndexed=indexer.index(dataDir);
5 ^' F8 i9 g3 P } catch (Exception e) {
0 }2 u/ b3 l4 M // TODO Auto-generated catch block/ |# a0 r `& U
e.printStackTrace();
1 f* n! o" J; m( ?. D0 V& ] }finally{
) q- H) ]) Z9 I0 B6 y* |9 ` try {
1 R; n1 p" i0 [; i9 T$ z indexer.close();
3 |% C6 ^& A: t# O4 U! |$ w% j } catch (Exception e) {7 a- l+ D1 {' V$ c
// TODO Auto-generated catch block
/ u, c* w6 ]2 @1 z e.printStackTrace();
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long end=System.currentTimeMillis();; h7 q0 \0 G5 G. L2 d
System.out.println("索引:"+numIndexed+" 个文件 花费了"+(end-start)+" 毫秒");! i9 I1 i9 I" B! `
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}
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(2)、查询:8 i2 f% h% s- n
import java.nio.file.Paths;6 U: Y5 E( S) r/ S0 B! a; M& t
( x& V7 Y8 f& Y( {, E' limport org.apache.lucene.analysis.Analyzer;
6 b3 g) u) O' M2 L) cimport org.apache.lucene.analysis.standard.StandardAnalyzer;/ q# @, v/ N* q' x
import org.apache.lucene.document.Document;
9 q+ [! o+ `3 \% Bimport org.apache.lucene.index.DirectoryReader;
" O4 w5 z- C+ E9 N- q3 V3 t+ q( }import org.apache.lucene.index.IndexReader;
4 _, H% k# Q* X5 C' K' limport org.apache.lucene.queryparser.classic.QueryParser;6 B0 m! Q. U7 S! O
import org.apache.lucene.search.IndexSearcher;. f: O7 K# n* c! K5 c; G
import org.apache.lucene.search.Query;
9 w: ?$ U9 C& Q! L: ]2 Fimport org.apache.lucene.search.ScoreDoc;
j8 D5 S2 G8 ?/ t& `' d5 c: qimport org.apache.lucene.search.TopDocs;
' x E+ P4 J8 F& ~7 ?, J2 U+ A7 _import org.apache.lucene.store.Directory;
$ @6 @7 v2 B) Fimport org.apache.lucene.store.FSDirectory;2 Z3 }6 o/ J) Q% m; C
1 d+ G3 i- O" q k1 a0 @public class Searcher {
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/ w8 L Q$ ~5 f/ }% P6 A8 h. b, L public static void search(String indexDir,String q)throws Exception{2 t6 i) z, Q* S
Directory dir=FSDirectory.open(Paths.get(indexDir));! C+ T) S% W. {8 M4 a
IndexReader reader=DirectoryReader.open(dir);
) _1 T. z, {1 b IndexSearcher is=new IndexSearcher(reader);
' J, S3 x$ Y! y Analyzer analyzer=new StandardAnalyzer(); // 标准分词器
- w& k4 i) c( {, g% T QueryParser parser=new QueryParser("contents", analyzer);
4 `- v; k8 N" l& ?% s- |# i" t Query query=parser.parse(q);
# w. E# ]- X, v0 f( ?7 m long start=System.currentTimeMillis();" ^7 z1 ~% P4 P' v7 K# l* B
TopDocs hits=is.search(query, 10);
/ c8 b% q7 | Q long end=System.currentTimeMillis();
) s- b5 O+ l& ]4 G4 d System.out.println("匹配 "+q+" ,总共花费"+(end-start)+"毫秒"+"查询到"+hits.totalHits+"个记录");
% J [2 J1 ]/ C& L+ n for(ScoreDoc scoreDoc:hits.scoreDocs){
. ^9 S$ d( `' i5 l' h6 A Document doc=is.doc(scoreDoc.doc);5 L# [1 {% w- A( i' f8 {/ i7 ^- @/ \
System.out.println(doc.get("fullPath"));4 ~$ Q8 b1 P. m9 f2 V0 ~
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reader.close();
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public static void main(String[] args) {7 T- X% a$ ], o' `' v* y
String indexDir="D:\\lucene";
i. X( R' t6 _4 o7 f8 ]* q String q="Zygmunt Saloni"; W" P9 A* L$ _/ w. e2 N5 u
try {
" M0 ~6 S( G& l, D/ M, K& O; _; j search(indexDir,q);. d! k% [, E% {8 A8 B
} catch (Exception e) {
( ~; o8 ~$ s* e // TODO Auto-generated catch block+ k1 `, \# D0 N8 M# |8 d
e.printStackTrace();* g0 I! S6 Y: \ l1 ]" h2 p s
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}; ~/ U3 G0 }7 I. U6 C+ \" q
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