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1、lucene.apache.org
/ v, v& W. _! Q3 N' j+ _2、5.3.1版本
- D: p5 _- t; y, ]3 A5 K( ]3、源码:
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5 \* z6 d$ R6 ]) d5 P0 p<dependency>
) O) C3 w# B, u s( L' }6 j <groupId>org.apache.lucene</groupId>+ D3 E( y7 m' P# x. z% T
<artifactId>lucene-core</artifactId> [% H5 u; \1 L- W$ p
<version>5.3.1</version>
' G- f3 K* N3 U+ T6 W </dependency># C! |( ^; k2 a8 g- X; e g
1 r5 X- N; I8 J <dependency>
- k1 W U. s. z1 V0 h( o <groupId>org.apache.lucene</groupId>, J1 w# o0 X- ~' y9 y. p; l0 ~
<artifactId>lucene-queryparser</artifactId>
0 ~1 P" W6 O9 Z) T2 D5 ^7 G <version>5.3.1</version>
8 ?% O( g& ?5 W. k& Z) z </dependency>
1 I' s* [5 |/ d5 c
7 [8 @3 c- \8 `0 [6 C <dependency>
) k; Z* X' s! s <groupId>org.apache.lucene</groupId>3 C9 \# _- C8 a M$ y' c
<artifactId>lucene-analyzers-common</artifactId>+ Q. R- J2 ]* T* ]) u1 R
<version>5.3.1</version>
) _' U9 }; z8 C) p% Z& o. V </dependency>- U! V6 {" d. V, B- h1 H+ J# ^
" b' \: z' }" O1 i$ e, Y(1)写入:+ H+ ?/ V2 d3 a
import java.io.File;
8 k0 R; x5 q( K# J# jimport java.io.FileReader;
5 C. Q& z; d9 u4 {! J2 t; d4 @$ Rimport java.nio.file.Paths;. M) W# U+ `* ?; R% F5 f2 v
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import org.apache.lucene.analysis.Analyzer;3 y, G" ?$ m; p
import org.apache.lucene.analysis.standard.StandardAnalyzer;4 W! ]$ U" U8 ^8 @' _( B7 |
import org.apache.lucene.document.Document;
6 j4 i8 K" j: m: n+ `import org.apache.lucene.document.Field;
: I6 u! P% r1 } e( F3 limport org.apache.lucene.document.TextField;' d$ ?$ `8 R2 _4 ?
import org.apache.lucene.index.IndexWriter;
* B7 V. p; Z @3 y" Bimport org.apache.lucene.index.IndexWriterConfig;( ]% a4 X) }; T
import org.apache.lucene.store.Directory;" c# R2 g& v; M. O; m0 V: O
import org.apache.lucene.store.FSDirectory;
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public class Indexer {
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private IndexWriter writer; // 写索引实例% |5 T ? z' @5 q1 K8 x
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/**
; K9 T. `4 D" l7 M8 @ * 构造方法 实例化IndexWriter( l( o/ h5 X0 s% i
* @param indexDir
% `; c; a6 \" o J * @throws Exception
7 W. `0 \9 ?9 L7 z( B' H */
" U q+ z; O6 @. _( ?) \" O public Indexer(String indexDir)throws Exception{
8 j% B: I6 g1 T# x0 R Directory dir=FSDirectory.open(Paths.get(indexDir));) V6 R p+ j! a( |0 r
Analyzer analyzer=new StandardAnalyzer(); // 标准分词器' B' ]0 u( L/ t% s
IndexWriterConfig iwc=new IndexWriterConfig(analyzer);
/ p) n R' y& P0 K; N q9 t9 D3 v writer=new IndexWriter(dir, iwc);! G2 p4 `0 x+ y2 ]7 ^3 `" q
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+ a& }5 _4 N: e* `: f4 v /**3 U8 w! U2 J+ i+ g) V* E! f
* 关闭写索引, X) Y; O9 M' i7 _2 o) V6 N! Q
* @throws Exception: q7 @* I5 Z. [9 I. b
*/
+ z) E2 j1 {- J$ _/ X public void close()throws Exception{
' ]% e) u! A# d7 k writer.close();6 y- w. X" {7 o7 L) W! n! f* ?
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/**! L, ?1 A4 l7 ]# u! O0 o8 _
* 索引指定目录的所有文件
0 T1 j1 b9 r. z% ^9 A0 U * @param dataDir+ e9 n" c6 i$ B e Y2 K
* @throws Exception
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public int index(String dataDir)throws Exception{
; L/ ]" [& n1 V6 \. y File []files=new File(dataDir).listFiles();
" N5 S7 M, \1 i% I/ P for(File f:files){+ ~/ q0 v* a0 [# N$ m% b
indexFile(f);) |" ]; [! B) `
}
# z7 @) z% b1 a return writer.numDocs();
& ^ L$ }% [3 k: f+ k+ M" ~ }
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/**3 n$ l. ]4 t: {6 V c
* 索引指定文件
2 m0 D% X: W( I: D: }0 H2 e8 _& Q * @param f
3 b& H0 c: @5 ~2 g+ y' [ */
4 [. \/ ~+ k; q$ q5 v1 I S private void indexFile(File f) throws Exception{8 c- ~# ~2 C! e# e3 S
System.out.println("索引文件:"+f.getCanonicalPath());3 H) m5 p+ _7 d* a' {" B; _: j
Document doc=getDocument(f);3 j& @8 W r! n6 S( m$ c
writer.addDocument(doc);
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/**
! M' D# F( |1 @5 R8 S( b! A * 获取文档,文档里再设置每个字段8 o' ?: A8 n- p
* @param f+ M* m* n3 K' m2 A
*/
( E% k6 F5 H! g# n* J0 h. t private Document getDocument(File f)throws Exception {
0 S, V- g2 a. T2 S Document doc=new Document();
2 G8 w. x- ]* P* r, I doc.add(new TextField("contents",new FileReader(f)));4 k1 Z' g7 g# G! n i e! _
doc.add(new TextField("fileName", f.getName(),Field.Store.YES));
# T" l3 ~9 s" [* a& v doc.add(new TextField("fullPath",f.getCanonicalPath(),Field.Store.YES));
2 f3 g; c- F7 b( \/ A: K return doc;
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L% q& C! E" T4 c public static void main(String[] args) {
6 m7 J8 U$ s; |) e String indexDir="D:\\lucene";
9 E# x' s! ^2 U: ~: Z String dataDir="D:\\lucene\\data";4 c" I. |0 e% s7 Q( J- d4 l
Indexer indexer=null;, k5 H, o: O0 W4 [6 R
int numIndexed=0;
8 S, {; r* V; R; Q* Z* A0 Y long start=System.currentTimeMillis();
. R' ?/ H3 S2 f6 b+ [0 H try {
. \7 w' f. x3 D# i indexer = new Indexer(indexDir);
' O% H9 U/ h- D numIndexed=indexer.index(dataDir);
3 P7 o; d6 x, L0 G9 J5 v) X } catch (Exception e) {
2 \( B# P7 q& d* b8 Q" A6 v // TODO Auto-generated catch block% o5 y. M. g% U% f- _
e.printStackTrace();
1 O( u r* d; C3 \ }finally{# J& L+ u5 s" {4 e9 Q( B* z
try {
3 L; Y0 _" G+ G0 T$ A5 k3 [& E2 I indexer.close();
$ F+ d4 E* a# H& ^ } catch (Exception e) {
' _+ d1 _1 D H' q // TODO Auto-generated catch block F& N/ ~% M/ l% ~7 P8 { Z
e.printStackTrace();5 o9 y. p! W4 g S
}
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6 m* c. O" K$ t. ^. W long end=System.currentTimeMillis();& _& h0 Y$ V* F# ]( `+ I
System.out.println("索引:"+numIndexed+" 个文件 花费了"+(end-start)+" 毫秒");( {6 [" B: q' z, b
}
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/ t7 r; t$ j$ ^( a4 Z- }(2)、查询:2 F4 h) o; c( n9 v) M4 r" f4 t4 n
import java.nio.file.Paths;
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import org.apache.lucene.analysis.Analyzer;: q% G* T. M9 O# u$ `
import org.apache.lucene.analysis.standard.StandardAnalyzer;8 }4 T# |0 {. w+ P
import org.apache.lucene.document.Document;
" k+ A% @7 @ |8 V7 a$ l$ W/ iimport org.apache.lucene.index.DirectoryReader;( H( v7 h6 @# U, V& z: b. x
import org.apache.lucene.index.IndexReader;* h- M1 l0 E0 O# W: |
import org.apache.lucene.queryparser.classic.QueryParser;
7 q; U0 O! \# _$ ~1 J1 g* Rimport org.apache.lucene.search.IndexSearcher;% L2 U( W/ Y) m. N3 }- O& @
import org.apache.lucene.search.Query;, ` W7 F" [' _+ C
import org.apache.lucene.search.ScoreDoc;
& W5 O' t( _/ |% T7 N, ^import org.apache.lucene.search.TopDocs;4 [, i" T% W$ P! x' s9 O5 T; B
import org.apache.lucene.store.Directory;& N: K, o5 Q' S$ k
import org.apache.lucene.store.FSDirectory;5 _! I+ B0 ^+ m8 A4 n+ D6 Q/ T
: G M4 k( k7 ?+ rpublic class Searcher {
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3 S2 W* I1 j3 h' L6 o public static void search(String indexDir,String q)throws Exception{' U$ s; `5 S8 f& v
Directory dir=FSDirectory.open(Paths.get(indexDir));
( W! r7 e0 ^/ {6 z- N& L IndexReader reader=DirectoryReader.open(dir);% w% Q5 s, T6 ]& d4 x" |
IndexSearcher is=new IndexSearcher(reader);( g3 W. R9 B# E/ u$ q+ k
Analyzer analyzer=new StandardAnalyzer(); // 标准分词器4 ~8 M8 f [# d" W" r# O7 ~
QueryParser parser=new QueryParser("contents", analyzer);
; m) W) s: {6 g4 r' \/ v Query query=parser.parse(q);
2 m! K0 |) i+ h/ \3 s long start=System.currentTimeMillis();! r( ~' y- a# u8 Q1 C# Q, o
TopDocs hits=is.search(query, 10);3 d! X0 [9 j6 O. X2 U( @
long end=System.currentTimeMillis();" v O, S/ ~9 t9 Y! i
System.out.println("匹配 "+q+" ,总共花费"+(end-start)+"毫秒"+"查询到"+hits.totalHits+"个记录");8 i* m2 Q+ t3 J
for(ScoreDoc scoreDoc:hits.scoreDocs){1 E' U% H7 r" {# Y1 V- ^! G
Document doc=is.doc(scoreDoc.doc);" P/ Q# \7 @- l6 o3 Z, S% Q6 m
System.out.println(doc.get("fullPath"));
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, r7 L% ~# ~8 p$ g* ~ reader.close();
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# C9 q6 t* m" r public static void main(String[] args) {
! u ~0 D% l3 q& M/ w String indexDir="D:\\lucene";
/ ~' m4 ^# D8 Q$ T String q="Zygmunt Saloni";( I* Y0 `" a1 Z1 L; B
try {
, l3 N" N* A' A/ o8 T/ ]) W V5 n search(indexDir,q);6 y/ f0 C( e- |, N
} catch (Exception e) {4 S% N+ {' D8 X) W
// TODO Auto-generated catch block
% C) J4 Z1 R% q5 A( D2 M. F/ [ e.printStackTrace();
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