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1、lucene.apache.org* ?. i% L2 |' K; U9 m0 {
2、5.3.1版本+ M4 |/ x7 P* p8 }8 L
3、源码:( @- N2 h; D! B' C4 E
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<dependency>
+ L/ Q, N1 I n# }# R: n <groupId>org.apache.lucene</groupId>: ~8 ~5 S) V. N4 J5 Y
<artifactId>lucene-core</artifactId>! K% K' o+ m! i" x$ e/ r5 z% w2 d
<version>5.3.1</version>% Y/ @4 K# D3 x* ~ c' o
</dependency>
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<dependency>! x7 _1 Z9 _, ~
<groupId>org.apache.lucene</groupId>
; g1 g& u' W3 \% @2 W- M, x <artifactId>lucene-queryparser</artifactId>6 \: o, n* v0 ]2 J, ~7 \: e
<version>5.3.1</version>
$ i5 a9 U. {, U h& T8 x" f </dependency>4 J/ ?' X& W& d+ @2 F
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<dependency>7 S: Y" h! {2 p$ m
<groupId>org.apache.lucene</groupId>
+ L% S$ Q/ h2 f @* a <artifactId>lucene-analyzers-common</artifactId>% l8 ^& @$ P, A5 B! |5 Y H
<version>5.3.1</version>
- A; M. X- `+ ^2 x </dependency> n" U+ l5 `2 t7 i
! o$ R/ X) \+ d1 R: w0 }! p: D4 E(1)写入:5 M% t" n Y) g* m
import java.io.File;
`# [( p/ ~ d6 Gimport java.io.FileReader;
1 v1 I) z* F" Q0 H+ t: @; k# bimport java.nio.file.Paths;# a* @0 _! P2 j, x# ~: {( V( L( O
. H2 |8 ~# a! {* V$ b. l4 r) Iimport org.apache.lucene.analysis.Analyzer;
R0 {9 r* i7 h1 V: E' ?) V2 Pimport org.apache.lucene.analysis.standard.StandardAnalyzer;7 U8 @" L2 w% G0 x& ?0 u; d& H+ m
import org.apache.lucene.document.Document;( U& o. q6 I4 E: \4 F$ _
import org.apache.lucene.document.Field;
0 V4 i/ A% i5 e; ?; qimport org.apache.lucene.document.TextField;1 Q' n5 E+ C4 `& V7 @
import org.apache.lucene.index.IndexWriter;
! A" I0 \, h9 a* _0 c2 ^! z/ @2 Iimport org.apache.lucene.index.IndexWriterConfig;
+ j' n! ~7 y9 k: w: Y" Q5 R+ b/ Q. eimport org.apache.lucene.store.Directory;
% r8 q7 o7 J5 Q Q9 T/ ^import org.apache.lucene.store.FSDirectory;
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3 P% V/ M0 T8 a+ bpublic class Indexer {
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private IndexWriter writer; // 写索引实例
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6 W6 @% \: f5 ^- a% q' a* i8 N, E /**
: L* p0 I# U7 `( {/ m * 构造方法 实例化IndexWriter/ m% c* B, v, Q7 u
* @param indexDir7 s5 A6 }2 a$ D% c3 [" `/ Q- ?1 j# |" J
* @throws Exception q% C. L& z" c2 b$ J6 l- E3 I; p
*/
3 y, v$ S) Q: v% f9 R; ] public Indexer(String indexDir)throws Exception{% w7 ?4 A. o) D6 B0 O/ n
Directory dir=FSDirectory.open(Paths.get(indexDir));
* b0 R3 B) O7 W& f! a4 w, r Analyzer analyzer=new StandardAnalyzer(); // 标准分词器
0 ]6 Z* I$ O! w1 ?& d' H% E( T$ c4 o IndexWriterConfig iwc=new IndexWriterConfig(analyzer);5 l0 V# M2 c1 z
writer=new IndexWriter(dir, iwc);0 P2 A4 C5 Z2 B7 b" X
}
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& t2 A% ? U7 N, N3 j- e /**
- v4 Q0 Q1 P: Q2 {, I O+ _ * 关闭写索引
7 I- S4 t( i+ s4 v * @throws Exception+ T$ u, w4 S% }! a) ^$ Y# k1 ^
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public void close()throws Exception{8 m- C" Z5 f; W4 j' |
writer.close();
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/**
! \9 d5 W8 t4 _! Q [/ w. C * 索引指定目录的所有文件4 X1 a( z3 V3 j4 Z; F$ z7 M
* @param dataDir* f' N/ P6 m0 a9 S
* @throws Exception( {5 k6 ^1 ]" ?( f8 s# h
*/
1 C. `- A: |; ?& b3 E3 L. t4 i% F# b public int index(String dataDir)throws Exception{5 Z: t; J: Z8 J f5 Y( p+ s
File []files=new File(dataDir).listFiles();
2 O8 A% l' |: N" t4 Q for(File f:files){( S* S5 l {8 s( r
indexFile(f);
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return writer.numDocs();$ ?- R6 A ?) X9 N1 {
}
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/**
8 b s9 h8 H |8 p: n0 q! E * 索引指定文件. M m% T( |; }5 ?' @8 U7 o+ X
* @param f! _- C! t" O) [, Y$ `
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private void indexFile(File f) throws Exception{
/ t0 H" _6 c1 e# C System.out.println("索引文件:"+f.getCanonicalPath());
: x8 I: f9 v9 P3 E7 d8 w* m9 W Document doc=getDocument(f);$ D# l5 S. ^ e# ]" u! r( Z
writer.addDocument(doc);( f$ q5 m/ f: S. {
}
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% t( |- I* d+ Q9 l /**
% n" }0 c7 v* x! X: S: G2 i- C * 获取文档,文档里再设置每个字段
2 B* Q' }7 A6 D1 I7 L. O3 H * @param f
; h3 j5 H6 i; ^ */
( E1 h) D# X" {! X1 N private Document getDocument(File f)throws Exception {
6 `1 t# G2 o) B% y' u Document doc=new Document();% p' }" c+ J% ]7 _
doc.add(new TextField("contents",new FileReader(f)));( b1 l# F9 U1 a4 C) O/ S1 U( K
doc.add(new TextField("fileName", f.getName(),Field.Store.YES));4 n6 u9 r0 [! A8 k* Z. ^
doc.add(new TextField("fullPath",f.getCanonicalPath(),Field.Store.YES));0 w/ F `1 F4 w) d; ]
return doc;, {8 k# `+ V2 ^5 i
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public static void main(String[] args) {
0 D- s2 O6 O9 |& Y( t, K String indexDir="D:\\lucene";9 o- g& T9 A2 O$ G! t/ s, g( m
String dataDir="D:\\lucene\\data";
( k1 A* U/ f( g. d$ P" S. c5 S Indexer indexer=null;; J7 y* n/ k' x! h
int numIndexed=0;/ R1 V5 h1 T1 U; I% u' e( D+ E2 C
long start=System.currentTimeMillis();/ e( @. [/ x* {) f
try {
9 S+ Q' F% p. J5 u" j1 }8 H9 B9 ~3 o indexer = new Indexer(indexDir);
7 G4 D$ H: y6 D$ i numIndexed=indexer.index(dataDir);
$ S$ U4 q( r3 l8 l } catch (Exception e) {
- m0 O J1 d/ L& g: ~ // TODO Auto-generated catch block; X0 `& C3 v. v1 t5 f7 M
e.printStackTrace();# ^/ S& \8 {( |" g
}finally{
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indexer.close();1 w8 l! w: w4 I9 U- S& C
} catch (Exception e) {
- [ H# A2 J0 `/ H4 E. I // TODO Auto-generated catch block
: Z3 [, `* k) K e.printStackTrace();
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% y& e" e; ~) `/ G0 C' Q; p6 \' z long end=System.currentTimeMillis();
2 ^5 e( P6 ?( x$ g; w, a System.out.println("索引:"+numIndexed+" 个文件 花费了"+(end-start)+" 毫秒");
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}
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/ f5 t. m: Z7 n6 _(2)、查询:- F9 W4 i- f( W1 u/ R) k
import java.nio.file.Paths;
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. \, |: i! p2 E) u v. t6 C5 [1 iimport org.apache.lucene.analysis.Analyzer;$ h0 S3 ^- B8 {% j" p4 \( p
import org.apache.lucene.analysis.standard.StandardAnalyzer;' b4 K' v! G" T+ d: r
import org.apache.lucene.document.Document;9 @* P6 ~7 M& r6 }5 Y4 V
import org.apache.lucene.index.DirectoryReader;
7 M5 k" G2 D. Z7 i0 Oimport org.apache.lucene.index.IndexReader;7 N8 R0 `% C5 ]! S+ ]! k1 O9 h
import org.apache.lucene.queryparser.classic.QueryParser;
7 y! F6 j. f4 b3 y8 z! Jimport org.apache.lucene.search.IndexSearcher;+ l$ G4 H' Y! x' S1 S* `- ~# J0 Y
import org.apache.lucene.search.Query;+ q7 h; {7 \8 i, ^9 [; l( b2 i7 R/ M
import org.apache.lucene.search.ScoreDoc;
g: F: x, C8 X6 Y7 Simport org.apache.lucene.search.TopDocs;
) U! T3 b# C) Bimport org.apache.lucene.store.Directory;6 t/ [9 ^; Z( Z& `1 g2 I: G. [8 K
import org.apache.lucene.store.FSDirectory;' f0 }4 z1 l, V
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public class Searcher {& I6 s0 i( U- G
' U5 y4 D8 _: \# C/ m+ K& h public static void search(String indexDir,String q)throws Exception{
6 F2 n4 ~2 }$ }9 X. }+ Y+ b0 ~ Directory dir=FSDirectory.open(Paths.get(indexDir));
0 [1 _9 H" L* J# s/ O" h IndexReader reader=DirectoryReader.open(dir);
/ {) V( z, t7 I IndexSearcher is=new IndexSearcher(reader);2 C/ S) a5 i$ i4 N3 H* X+ {
Analyzer analyzer=new StandardAnalyzer(); // 标准分词器
/ Q, t; X& z& Z, q; i) ~! X# v QueryParser parser=new QueryParser("contents", analyzer);& l$ M3 ^8 o5 ^& n; ]0 ]' Q
Query query=parser.parse(q);
; Q# Q/ ?# H% G5 f! J# X! \+ I8 q long start=System.currentTimeMillis();
0 } L5 y- P/ h7 N# I TopDocs hits=is.search(query, 10);
. r& ]$ I7 ?! R S1 H long end=System.currentTimeMillis();
! u+ \$ a! z& B; P9 x1 e% v# m System.out.println("匹配 "+q+" ,总共花费"+(end-start)+"毫秒"+"查询到"+hits.totalHits+"个记录");, }- t @ @: l" ]# R) _& a m" B
for(ScoreDoc scoreDoc:hits.scoreDocs){
9 H0 ?$ m# D6 d Document doc=is.doc(scoreDoc.doc); r) \8 d% ]- A% H
System.out.println(doc.get("fullPath"));
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reader.close();1 K, C% e, B5 W' t2 e
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6 x) r) k" @' K" K5 Z9 V public static void main(String[] args) {
( w* W% F k. l7 _' n7 F8 ^- ~ String indexDir="D:\\lucene";
/ W8 L- \' N5 G: F String q="Zygmunt Saloni";& {2 v4 S4 U/ L. r% Q
try {
{# Y0 |5 h% O, W3 {) @# g7 V search(indexDir,q);* N2 L/ Z+ c5 l5 A5 C' e
} catch (Exception e) {# J% a4 {/ L# i
// TODO Auto-generated catch block: A4 |0 ?$ x/ Q& O
e.printStackTrace();: E/ j. x+ C% w
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}
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