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1、lucene.apache.org8 S& c- f8 I$ z/ S0 y- ?
2、5.3.1版本
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(0)pom:
/ S0 A9 ^( Q6 b- D3 C<dependency>
! T* o+ Y) |! ? <groupId>org.apache.lucene</groupId>
7 g) @7 z7 w$ y6 `2 G) a <artifactId>lucene-core</artifactId>
# ]. M8 C( j' V! e3 T <version>5.3.1</version>
3 g% t. v' i4 B- B Z$ m& @+ _ </dependency>7 V' Q* a+ S& O0 {' e3 d
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<dependency>
6 E* f7 C6 T0 L |! `: l8 Q: w* o <groupId>org.apache.lucene</groupId>
% z% }4 f! g3 z4 x8 M6 Q1 q3 s <artifactId>lucene-queryparser</artifactId>/ l- F& T9 c. v- N+ k% k# H3 F
<version>5.3.1</version>& _0 e8 J; v! W$ e% U
</dependency>0 o. ]8 T) S: k& c& ~0 O
0 m' h% F! k y8 f6 ~ <dependency>
3 s8 ?! g" Y) K4 ~- P <groupId>org.apache.lucene</groupId>8 o Q F+ ?% T5 I% E5 N/ B
<artifactId>lucene-analyzers-common</artifactId>7 ?' ^! s: x/ i1 {9 Q/ v' K+ W! p! _
<version>5.3.1</version>& X- p. T4 d. @, n
</dependency>6 l& }5 H1 p6 ]
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import java.io.File;4 M" q$ b1 K/ ~+ @
import java.io.FileReader;" y) u7 b. ~7 K" L! c2 m9 [
import java.nio.file.Paths;! M' S9 u5 w. {5 v t4 q
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import org.apache.lucene.analysis.Analyzer;
+ k. F6 U+ }1 P9 Jimport org.apache.lucene.analysis.standard.StandardAnalyzer;
* O3 V* [1 [# i0 c i; N2 Dimport org.apache.lucene.document.Document;
9 Q! e2 H d1 W, K2 H1 N% Gimport org.apache.lucene.document.Field;( d& r3 x0 ?. z1 P; g
import org.apache.lucene.document.TextField;
, `! D- X6 E% u. P5 W T* ^' {import org.apache.lucene.index.IndexWriter;) P9 E# H" v" h( ^0 c8 Z
import org.apache.lucene.index.IndexWriterConfig;
+ o* R" Y1 `( u; h) V1 j3 ]import org.apache.lucene.store.Directory;
* W9 q% I0 N3 timport org.apache.lucene.store.FSDirectory;
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: F% H. Y) V9 K) lpublic class Indexer {$ G* S* C/ Q0 `, q5 N
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private IndexWriter writer; // 写索引实例
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/**
5 g2 P% F# ~5 n }- } * 构造方法 实例化IndexWriter) J o% T% G2 R% q
* @param indexDir) ]4 H2 G U$ R8 o9 a
* @throws Exception- N2 L, ^: n, G- ^0 L o d+ }
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public Indexer(String indexDir)throws Exception{
: f) ~' R. N" w) U' q' u0 h+ Y0 y Directory dir=FSDirectory.open(Paths.get(indexDir));
9 A) |# {" ?/ f- w$ N% k3 R) V Analyzer analyzer=new StandardAnalyzer(); // 标准分词器9 d6 p. [2 H6 c- K6 C( F
IndexWriterConfig iwc=new IndexWriterConfig(analyzer);, F2 ~; b. ^( m9 b( |. d
writer=new IndexWriter(dir, iwc);
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/**
% S' J0 z+ O! f6 @+ c1 q( l" z * 关闭写索引- g. y! P) b- \: n7 u0 L: p
* @throws Exception
# u4 B/ ~+ x" n" _ */
. @. G* \& `- I$ h; H2 C0 O public void close()throws Exception{% d$ r3 N9 o) h9 H8 Z
writer.close();' k2 M' O! w q5 w
}
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/**+ _. e* J/ q! \, U3 i1 _3 E4 E
* 索引指定目录的所有文件
( j1 t& C( _# q) J8 c+ t * @param dataDir
. o- L+ V( J' h8 t) h * @throws Exception
% Y) p1 z# f4 N4 _ */
R6 f) J% u' i) Q public int index(String dataDir)throws Exception{
' H" u3 O1 ]& V" D File []files=new File(dataDir).listFiles();& }; }& E h+ N+ A! ^
for(File f:files){
' F7 z$ O5 B% \2 h( k( ] indexFile(f);
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return writer.numDocs();
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/**
3 J# n4 h, N2 a: X * 索引指定文件; w( x' u" x+ E5 J( |: ?* z. }
* @param f
. L- }3 K: W, Q: C. R */" b% g; C! W2 b$ ~7 n/ e' a" i' V
private void indexFile(File f) throws Exception{" ]7 q" S0 b3 E/ P# `$ f" ?
System.out.println("索引文件:"+f.getCanonicalPath());% {# P- @, |. Q: N' j% D! C& O
Document doc=getDocument(f);
7 `6 ]/ j1 R- f8 H# E. ~# W writer.addDocument(doc);2 G! i; p; B( X" V4 A
}
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/**
1 w8 R# P8 }2 J * 获取文档,文档里再设置每个字段
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*// s+ v& a+ M! K _
private Document getDocument(File f)throws Exception {0 z6 d/ {5 A1 `0 c E. l- ?
Document doc=new Document();
) N1 {; q" b& F4 `4 G i doc.add(new TextField("contents",new FileReader(f)));2 ]8 G7 x7 Q* g2 p3 |
doc.add(new TextField("fileName", f.getName(),Field.Store.YES));
* f+ K. E9 K8 @% Q$ l* X) r doc.add(new TextField("fullPath",f.getCanonicalPath(),Field.Store.YES));) b5 o+ C8 Q! I" m! c% A2 a
return doc;4 ?0 `6 r0 P( }9 K1 Q+ Y
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public static void main(String[] args) {
, C% h" i+ l; \8 O% s String indexDir="D:\\lucene";
# Q% g" [2 \! r% ^5 z. I" r String dataDir="D:\\lucene\\data";
, @ \; R0 X h1 m Indexer indexer=null;( o9 y; }8 i. E% p
int numIndexed=0;
+ v4 k! [3 I" L- f% m long start=System.currentTimeMillis();. H; ]' M) d& I( Z4 R" D
try {& O7 J5 X4 r; j( r
indexer = new Indexer(indexDir);
7 i1 D$ p s5 a/ A numIndexed=indexer.index(dataDir);, A: G" J/ w- w; M+ i* G6 p9 `" @
} catch (Exception e) {
. K o( h- i' @" e* h // TODO Auto-generated catch block4 r, E1 c# t: f# K4 t0 K+ p* r
e.printStackTrace();
& n3 ^4 j& V) u) @/ Q$ C _ }finally{7 c9 O) o1 _! T' H `2 B: Z; e
try {
) @; a4 E/ }# J" ?; N2 d indexer.close();+ g$ n7 i+ T! {7 L
} catch (Exception e) {, c4 ?4 o a% u" u" a8 f
// TODO Auto-generated catch block
) n5 W& o/ [% y% o e.printStackTrace();# | t! W* L8 ~7 `4 X( c& f6 s, s
}
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long end=System.currentTimeMillis();
9 }: R2 |; K. g9 ^) C T" F System.out.println("索引:"+numIndexed+" 个文件 花费了"+(end-start)+" 毫秒");
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8 S$ M* P6 `5 J# t6 O(2)、查询:9 F: e& b0 b' `- e4 } [
import java.nio.file.Paths;
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import org.apache.lucene.analysis.Analyzer;& e+ I% `. L0 U! Y) l- s
import org.apache.lucene.analysis.standard.StandardAnalyzer;8 l" |, s/ Y# C0 F. e/ ^' ?5 K
import org.apache.lucene.document.Document;6 x7 c& K) {5 Q9 j6 }6 ]$ I: R
import org.apache.lucene.index.DirectoryReader;
$ ^( e- Q# r3 c( Mimport org.apache.lucene.index.IndexReader;
# ]% _. U& W! `9 D. l( |; a* timport org.apache.lucene.queryparser.classic.QueryParser; L; C. g; ]0 f
import org.apache.lucene.search.IndexSearcher;
& W! ~" M8 y; Himport org.apache.lucene.search.Query;
3 L5 A3 B0 Z' d# ~+ Rimport org.apache.lucene.search.ScoreDoc;+ n9 ^/ w$ ]4 D% q$ v0 U% Q0 y+ ?
import org.apache.lucene.search.TopDocs;( B0 r! w: r" T# h2 r
import org.apache.lucene.store.Directory;/ }5 O# Y& a3 g* |: H8 }9 i+ `
import org.apache.lucene.store.FSDirectory;
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" c7 Y$ X6 S$ L6 o+ c R" l4 ^* g0 npublic class Searcher {
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public static void search(String indexDir,String q)throws Exception{' m4 g7 m3 F' \0 v3 Y$ \4 U; k
Directory dir=FSDirectory.open(Paths.get(indexDir));
( Z3 r. x. i; P* Z; i IndexReader reader=DirectoryReader.open(dir);! U. B$ G A! @! q% W3 Y
IndexSearcher is=new IndexSearcher(reader);
& J0 Y; r) }) o, L Analyzer analyzer=new StandardAnalyzer(); // 标准分词器
5 f7 a: u V+ D4 |8 a! n3 M QueryParser parser=new QueryParser("contents", analyzer);
) ]. X& T! t9 L- s Query query=parser.parse(q);
6 ~6 G! h' p$ X6 x7 @+ ?% w; a long start=System.currentTimeMillis();
( N9 n5 A# k$ I- L" O9 ] TopDocs hits=is.search(query, 10);
6 @- A. {; A' y2 r5 _, u long end=System.currentTimeMillis();& D$ I2 ^1 F4 g* I) V, ^
System.out.println("匹配 "+q+" ,总共花费"+(end-start)+"毫秒"+"查询到"+hits.totalHits+"个记录");
! x, p) F. v- G( s& [0 R for(ScoreDoc scoreDoc:hits.scoreDocs){. r9 U' E1 ?+ _
Document doc=is.doc(scoreDoc.doc);
( A' [; ]) F9 |4 c# V5 z System.out.println(doc.get("fullPath"));" w9 u8 A! Z- v# j5 j! ~
}
/ `% t( o0 q$ U: J3 X. ? reader.close();9 _- n9 F6 `( U ~
}
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public static void main(String[] args) {
( G) K. w3 M4 c8 y* z& R String indexDir="D:\\lucene";
% I# k* M7 y4 E0 @* w String q="Zygmunt Saloni";6 o0 c1 A1 J% |9 Y1 D
try {4 ]) g) Y7 }2 u
search(indexDir,q);
$ S: [+ B N R9 A# J5 L) F5 ? } catch (Exception e) {: K. w* _ H: C% X g. f- @ q
// TODO Auto-generated catch block0 ~ p! [9 H. g8 y+ j6 E7 }0 B, l( g. ]
e.printStackTrace();
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