|
1、lucene.apache.org3 `7 X1 C* ]" |% X8 n- a" r6 q
2、5.3.1版本
' x5 J; B) T1 b. }4 m3、源码:+ q$ S" u5 J5 w) Z9 d; W9 n
(0)pom:
. k9 N9 H$ I, M" ^2 a% x: z<dependency>- X) T0 i- g! s; \% B7 T
<groupId>org.apache.lucene</groupId>
+ y, S5 F3 N4 _0 \3 `, m <artifactId>lucene-core</artifactId>* O5 [( V! U3 D8 K- ^$ V
<version>5.3.1</version>
* y3 l0 D# U# r# J1 ~6 _ </dependency>$ m8 p4 {. G( P* O
- p' o$ ?7 D$ |9 m9 y# r <dependency>" f# I% m) P9 P6 H! l' U; L2 |# E
<groupId>org.apache.lucene</groupId>* G7 ^$ I7 @7 Q' O+ i- U' r- a
<artifactId>lucene-queryparser</artifactId>3 p0 Z/ _. q! [: {( N
<version>5.3.1</version>9 z( X, v* p9 @& F7 W
</dependency>
8 w" j# j3 O* Q, F+ k. Q. z0 o( y% ^1 k/ s
<dependency>4 K/ I5 |3 s! Q5 }2 E' c
<groupId>org.apache.lucene</groupId>. @! J/ b/ D1 P$ A y2 O
<artifactId>lucene-analyzers-common</artifactId>( c* C# S$ [, x' ^ ]* N$ `
<version>5.3.1</version>; k( Z+ o* I! e9 x; M- d1 g
</dependency>
3 u1 Y B# ^4 H8 |, I* S% q7 J+ L6 v9 s D2 U4 V
(1)写入:
. }/ N! }9 P, fimport java.io.File;
) H: Q) n0 E; c4 Bimport java.io.FileReader;
3 Q; p6 T3 a" ~9 nimport java.nio.file.Paths;
/ s: A) D8 i' P- S8 v! C8 @7 P& }, C% ^
import org.apache.lucene.analysis.Analyzer;
5 r5 p, R1 Z0 C8 Iimport org.apache.lucene.analysis.standard.StandardAnalyzer;* N% h3 e9 H5 W" h! {0 d+ ~9 s/ L
import org.apache.lucene.document.Document;
8 f2 M0 N+ A; ^3 Oimport org.apache.lucene.document.Field;
( v Z/ d$ ~' m6 I5 R: cimport org.apache.lucene.document.TextField;6 }' k! `3 p ~1 A
import org.apache.lucene.index.IndexWriter;$ i5 u9 v& S" r2 _; J
import org.apache.lucene.index.IndexWriterConfig;, [3 {6 L- u4 \
import org.apache.lucene.store.Directory;$ ?5 b0 n- h# i8 `. h
import org.apache.lucene.store.FSDirectory;
3 U b$ v( v/ P5 G, y! \6 f# _1 ^6 s% H+ \% L
public class Indexer {
, {% F! x+ ^$ c% R' C( O/ S& {4 T$ ]& }0 {* B' r
private IndexWriter writer; // 写索引实例& a! y$ i: x8 `2 w$ E$ U
( {! W1 N+ T3 F9 ?8 @! W/ R /**8 d* X0 j% ~: Y1 P( G ?2 ~ R
* 构造方法 实例化IndexWriter: H9 R* h& b+ r, I& m4 U& t
* @param indexDir+ h" `! f6 t& L- }
* @throws Exception l1 k# e. A& C N9 b
*/
$ }* _" U- c/ Q* z! Q2 B. b8 X public Indexer(String indexDir)throws Exception{8 r6 m& B5 n, a3 ~; x: z
Directory dir=FSDirectory.open(Paths.get(indexDir));
; ]$ g! f) I2 i$ Y( }7 p Analyzer analyzer=new StandardAnalyzer(); // 标准分词器8 i% ?+ Z } Z8 q( i
IndexWriterConfig iwc=new IndexWriterConfig(analyzer);
; a9 I8 a) \; t1 D( P+ \2 w* R/ m3 t writer=new IndexWriter(dir, iwc);* a: {$ w% ~/ Z( S5 K
}
$ i* H0 J, L5 d$ W
! i8 p N2 L* H4 `4 V* }# L /**, I6 l! a: C- x/ P+ m# u/ N! g
* 关闭写索引$ m$ i: \/ j, @; G X$ f1 R& n
* @throws Exception
6 A7 X' l# \3 Y% Y8 f: T+ S+ u */ M+ A6 X1 K7 D
public void close()throws Exception{
$ R2 _% y! f) k% H6 h6 Y# r writer.close();
3 A2 \, @) }, C% e6 G3 p7 v6 e }
9 B5 e, v# Z5 ?' ]$ v
4 b1 x. ~1 T. y /**
1 p9 |% j; A/ N1 H * 索引指定目录的所有文件+ f; q5 Y. I6 }2 k
* @param dataDir
' ]1 x3 W- g7 i0 \2 `' e * @throws Exception
% p" R( V; U4 ]( [! z */
9 i6 p+ h! v; i- m" D public int index(String dataDir)throws Exception{$ t) ?: K/ O( l. G' {
File []files=new File(dataDir).listFiles();1 Q4 N( [' t" X1 @1 i+ j
for(File f:files){
- O2 q/ L0 e+ t6 K* j; O indexFile(f);
3 R3 S, U+ u7 v1 B9 _5 j3 W }, j7 v/ w# O6 Z# T- I/ {! q
return writer.numDocs();
% _ l. z1 T3 L+ z1 ~ }$ P% ]' g1 X/ n( l: @& S2 t
) M, P0 v+ r8 l9 ]9 G' E1 E
/**) m& _, | N7 I a* u- c
* 索引指定文件
2 |8 ~3 B, j9 _7 |# E: E. A * @param f- y; s2 m( I& Y E9 k
*/
5 G0 m) Y6 H/ @2 p- O private void indexFile(File f) throws Exception{7 L) e- U3 O# P" O$ B- A% f: ^1 [
System.out.println("索引文件:"+f.getCanonicalPath());
( R0 v- n! T7 d, i- `; n6 w Document doc=getDocument(f);
b, N: k e! `1 C. K1 t! \ writer.addDocument(doc);. Z {4 K0 h" Z2 d
}4 Z6 l) I. F2 ^! |. z4 a) ?4 C
+ _8 A9 \- ?* R8 ?% k7 u5 {
/**7 m3 I6 Z8 y/ ~* u
* 获取文档,文档里再设置每个字段- J- F& C, g, \" R2 L( [
* @param f2 E ?. R0 p+ y3 S& E
*/
) | t P4 U1 s private Document getDocument(File f)throws Exception {
$ a) o& f/ m2 `1 o% @: {! q5 Z Document doc=new Document();
2 J7 @$ }+ \% h doc.add(new TextField("contents",new FileReader(f)));6 M0 A5 _; Q# ?* X; b
doc.add(new TextField("fileName", f.getName(),Field.Store.YES));5 d \" c) Q; y+ o8 Y. a
doc.add(new TextField("fullPath",f.getCanonicalPath(),Field.Store.YES));! T( W$ [5 t% C9 ]# F' @+ R
return doc;
9 E, r ?- S, I1 @5 T% B0 c }6 w! |$ h( x# o1 j" ^0 P# X+ {
; }, P. K1 e/ F& V5 e public static void main(String[] args) {
t5 [9 p1 o- O' p( O String indexDir="D:\\lucene";
) u R" ~: L) E5 [3 x String dataDir="D:\\lucene\\data";
: N! q& [/ u& }+ S7 n Indexer indexer=null;; V, F& H$ x3 }8 G B) k
int numIndexed=0;
: m) K$ D' y a& c8 c: }7 Y3 V" ^ long start=System.currentTimeMillis();
6 S( N: z8 C) o" @6 j4 C( V try {) R( w3 a5 o8 z n7 n
indexer = new Indexer(indexDir);; r' O- e- w i; ~. X3 I H
numIndexed=indexer.index(dataDir);! K' Q; `9 |) {: s; V
} catch (Exception e) {2 y, s# T( F) m7 j4 H
// TODO Auto-generated catch block
5 e* e, ~" v2 O! O5 P: ]% M* T+ V! U e.printStackTrace();
9 A6 k5 ]/ r; H4 G# }( c }finally{+ O6 b/ ~3 l8 S/ e% Q0 ?! ?: P+ z
try {
+ e7 i" p" x9 M/ s& X. L indexer.close();
- t6 B% ?9 O$ X% ^ } catch (Exception e) {: M% |. f& Q6 g; r4 Y! Y
// TODO Auto-generated catch block
; S. C* w( S# K+ e! \* U9 n5 o e.printStackTrace();; P: W, Q, k% y! ?
}0 u; ?' [5 m, a" e- f5 |& [, ^
}
5 Q5 J. A9 V3 m+ m. Q7 m long end=System.currentTimeMillis();6 f0 ^: X3 T/ p9 i* P' }
System.out.println("索引:"+numIndexed+" 个文件 花费了"+(end-start)+" 毫秒");1 H$ C; K7 j& l- o, ^
} o7 e) c& V4 J& H
}$ a. Y. G, q$ x9 J2 x
; Q5 L/ C% w+ V/ H( _(2)、查询:2 J1 r3 U2 z9 R. { F; G
import java.nio.file.Paths;- p }* `9 J! Z. W+ I( k
" t5 z J7 {. y7 ?( C, e4 U
import org.apache.lucene.analysis.Analyzer;- z! v- I7 }* l' G; ~6 X8 t
import org.apache.lucene.analysis.standard.StandardAnalyzer;
9 c) @* L1 ?! M9 b. o, V2 C8 F dimport org.apache.lucene.document.Document;
( A/ k) T) u- R' j( \7 h0 Oimport org.apache.lucene.index.DirectoryReader;# {8 B' h3 T/ _, \' B, O6 s/ ?1 R
import org.apache.lucene.index.IndexReader;1 f2 x r" g1 E, w! [ Q6 m& f' F
import org.apache.lucene.queryparser.classic.QueryParser;0 r+ K, S/ s3 H, q y: J% d+ Z0 { p
import org.apache.lucene.search.IndexSearcher;) S# R% \# c% A: I& R. J+ l
import org.apache.lucene.search.Query;) U7 S( W7 J+ `' L( R; p
import org.apache.lucene.search.ScoreDoc;
8 e! d7 ]* K/ o% \4 e1 V! mimport org.apache.lucene.search.TopDocs;7 I. q* I# d. w- N* |1 s9 h. J3 a
import org.apache.lucene.store.Directory;
$ D* ]" P3 _2 T* Z4 p, P; Qimport org.apache.lucene.store.FSDirectory;0 |7 e& f( b3 @$ _8 {, z, Q
8 I3 X, ]! H3 C
public class Searcher {
7 O, v5 o z$ Z) w! z! Y; k' }5 O/ M4 E' ~( w
public static void search(String indexDir,String q)throws Exception{1 g. r( w& ?1 \( V1 I+ y
Directory dir=FSDirectory.open(Paths.get(indexDir));+ ]4 g2 H9 d1 x; X6 [
IndexReader reader=DirectoryReader.open(dir);* Z5 S: D+ ^& _9 g! M" M
IndexSearcher is=new IndexSearcher(reader);
& d, I( x' W1 k# y Analyzer analyzer=new StandardAnalyzer(); // 标准分词器
9 ^/ d6 b: W8 L QueryParser parser=new QueryParser("contents", analyzer);; L0 Y% g3 V3 B4 J
Query query=parser.parse(q);- b. \& [) J, f' ]; _6 t
long start=System.currentTimeMillis();
+ T) p9 g+ [( o* c5 E/ W R TopDocs hits=is.search(query, 10);5 j1 ]: c# F2 E) Z
long end=System.currentTimeMillis();
- m2 u/ \) N1 w System.out.println("匹配 "+q+" ,总共花费"+(end-start)+"毫秒"+"查询到"+hits.totalHits+"个记录");6 s L( }0 ?/ z& M3 h+ m
for(ScoreDoc scoreDoc:hits.scoreDocs){
6 G7 I5 H! u; J Document doc=is.doc(scoreDoc.doc);" p# n3 U/ O" [3 O. B Y
System.out.println(doc.get("fullPath"));$ l( A* p7 x" m. e7 _& b
}7 U+ b) @# v' m! S9 ]7 x) ?& ?1 E
reader.close();
5 d& `4 {6 m6 b9 J }
( I2 o4 b5 f& `
8 |- B: r3 g* G public static void main(String[] args) {
6 n& X; E3 g' ?& I String indexDir="D:\\lucene";
7 G$ V( ]2 o P. Y6 e$ ~: c" M String q="Zygmunt Saloni";" O9 N$ s7 B& @. W" |1 Y8 e
try {5 p8 J( A; k9 M& i$ _3 y
search(indexDir,q);( c2 ] Y" d% f& L& [% I7 W
} catch (Exception e) {% l; X- e1 Y; ` i0 K
// TODO Auto-generated catch block
. {+ z( ^! j% F2 b0 V e.printStackTrace();
( }1 R0 o$ ]- {! j- ?/ m$ g. r }/ y1 N. k1 A( [5 w7 D
}! K- E8 b: q) V9 N
}
: Y" b$ b% g1 n0 ^' q7 K/ ^
% k1 }5 J- J/ K8 a
2 o% X7 @0 F& v' `( `" d9 M# ~, ?) }+ a! T. l
' R) `1 r7 O, {% T1 g0 U |
|