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1、lucene.apache.org
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<dependency>
1 x- h' h' v) C <groupId>org.apache.lucene</groupId>
7 N) k: }0 B: n* ]* d1 Q <artifactId>lucene-core</artifactId>
2 U! {+ n! r% @ <version>5.3.1</version>
: k9 Y4 A) D2 ~0 s. t! `" ? </dependency>3 u& X; ]/ @0 E ^) B: p. S) w
^% b7 ? c# U$ D* W <dependency>) v3 f Y, r/ w) P' Y X: G6 F2 m
<groupId>org.apache.lucene</groupId>( D- g S: {3 O1 p, D( q6 j% T
<artifactId>lucene-queryparser</artifactId>
* O2 _" C: Y; T1 X6 @, P) I& B <version>5.3.1</version>9 d8 }: ]- r7 s7 u' [- {1 [
</dependency># N# b+ t; t. `# H4 k6 ]
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<dependency>$ ?' o8 p0 ]) g) P
<groupId>org.apache.lucene</groupId>1 W1 g1 |% ? u* c$ A. m4 k
<artifactId>lucene-analyzers-common</artifactId>
6 Q! `/ i/ e* [& f; d$ r <version>5.3.1</version>
: ?' z+ `/ n3 |$ S$ l6 g) n; P </dependency>
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import java.io.File;
9 y. A0 o9 t+ |: r* D* Z- B7 l" Jimport java.io.FileReader;
5 ]; U& l' t0 J4 K3 zimport java.nio.file.Paths;
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import org.apache.lucene.analysis.Analyzer;
, O( S6 C# B$ R& M' t# Timport org.apache.lucene.analysis.standard.StandardAnalyzer;5 i2 t$ n+ @( ?# x; m8 a
import org.apache.lucene.document.Document;$ Y7 b/ d' v+ L1 C
import org.apache.lucene.document.Field;
: C" t3 z$ ^7 Y$ ]* }( Z8 bimport org.apache.lucene.document.TextField;$ R* \: k' h" E4 k1 X
import org.apache.lucene.index.IndexWriter;4 V" `6 N; P. H
import org.apache.lucene.index.IndexWriterConfig;; X8 `8 c9 P9 U. s/ N" d; }% |- l
import org.apache.lucene.store.Directory;# N, K* O2 R" Q. |/ @1 j: C
import org.apache.lucene.store.FSDirectory;; b. }1 E; L# _0 y7 p% Y1 ?
0 g' K* I" E6 K5 Mpublic class Indexer {
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private IndexWriter writer; // 写索引实例6 t( V: A, e3 K6 K. g
* |9 m' W+ U- I /**& [$ `5 a- J9 T
* 构造方法 实例化IndexWriter
1 N: U( T7 P5 H( y/ P * @param indexDir/ Q b" v- ^- d! z% x
* @throws Exception
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public Indexer(String indexDir)throws Exception{1 E* c5 z2 ]4 G Y( o ?
Directory dir=FSDirectory.open(Paths.get(indexDir));
0 q/ Q0 r- n+ }1 e Analyzer analyzer=new StandardAnalyzer(); // 标准分词器' t7 Q6 j% c; v9 z
IndexWriterConfig iwc=new IndexWriterConfig(analyzer);) l- r8 c! I" o8 r. _ A3 M$ E8 ?
writer=new IndexWriter(dir, iwc);3 d: ]$ I: m5 i+ a( ]
}; \' ]& a0 t. U/ c. l
1 o- P) R. k9 \, Z l /**
2 r/ B. j r( ^# i' ?# Z * 关闭写索引0 C) K2 @- M% G
* @throws Exception
" H$ a4 N k( `, z, {. e, u" | */
8 y9 `! N( V4 H' l public void close()throws Exception{. K X* o8 ~3 |8 H7 A
writer.close(); v8 W* [4 L6 a. ?
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/**
; Q9 p! h s" h, \7 r * 索引指定目录的所有文件
i5 G2 r5 O! D( S9 s S * @param dataDir
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*/
& W1 T t& y5 G public int index(String dataDir)throws Exception{* k+ ^5 A1 C* l9 g$ h9 o* B# I9 b
File []files=new File(dataDir).listFiles();2 s; p6 j) v; W# f! } |: o
for(File f:files){
. q6 Z g* N/ A6 Q/ g indexFile(f);
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return writer.numDocs();
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/**" X N0 ~2 R8 }5 u3 I: T
* 索引指定文件
) {0 K' ~# S2 q5 M7 o: Z( x% U * @param f
: }2 S$ K j) t8 Y6 |) n3 O a1 @- ]; N */
; ~! H% v \% p- _$ T! }4 n' b private void indexFile(File f) throws Exception{7 t8 T5 d0 d5 x2 j' ~) L
System.out.println("索引文件:"+f.getCanonicalPath());
7 Y3 d1 W3 n" A( l5 R Document doc=getDocument(f);
2 m$ A3 ]; Q$ l. }; z; L6 W, ~$ p writer.addDocument(doc);
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/**! x! m0 \/ f" c0 w2 ^: Q
* 获取文档,文档里再设置每个字段
% ]! e; z6 T: d2 Q3 Z. j * @param f
( A( z m6 V) O, t2 r2 I */
; g. T: g' o: s: [' R1 l! A private Document getDocument(File f)throws Exception {, A* r; l4 r8 b8 i( N# w
Document doc=new Document();
' ?% p- J, f9 v* o* b doc.add(new TextField("contents",new FileReader(f)));
- C# M0 b9 `, [ B- J7 e doc.add(new TextField("fileName", f.getName(),Field.Store.YES));
% U' ^5 \* }$ Z+ D doc.add(new TextField("fullPath",f.getCanonicalPath(),Field.Store.YES));6 _8 M. O }) U
return doc;
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3 U- \. ~6 i" b9 B; c; S* K public static void main(String[] args) {
/ W7 ]* ]7 v* |' J5 T' \4 D1 A% r' | String indexDir="D:\\lucene";1 O9 q( m! g) ~" r% k
String dataDir="D:\\lucene\\data";
1 x/ |9 ^$ b. W7 L5 h Indexer indexer=null;( f- }5 R; W+ {$ ` [
int numIndexed=0;# n% N5 X, m* U
long start=System.currentTimeMillis();
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indexer = new Indexer(indexDir);6 L I; l0 p3 T9 d. d
numIndexed=indexer.index(dataDir);
4 T1 G% D. Q Z } catch (Exception e) {, ]2 ?& R5 y) L# {+ h X- n- S
// TODO Auto-generated catch block e% D7 D* G3 A( @
e.printStackTrace();$ d6 p+ O' n( p) j- p8 ?
}finally{
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indexer.close(); B, ` a9 Z) D$ ^
} catch (Exception e) {% q* C4 [. x% m% P# ~- t A
// TODO Auto-generated catch block. X- v7 i$ u; L( @
e.printStackTrace();
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0 Y6 O- V. B. A1 A! Q" e% I long end=System.currentTimeMillis();+ ~/ N$ X2 V5 N% I
System.out.println("索引:"+numIndexed+" 个文件 花费了"+(end-start)+" 毫秒");! P. v" L6 d% }) q/ G
}
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/ a @2 m4 |9 L. I: j0 A(2)、查询:9 t/ s# t& V: ]2 B' d) l w
import java.nio.file.Paths;& t- p" k# P. o
% R" |' V2 o: ^0 ^import org.apache.lucene.analysis.Analyzer;3 f- K0 q' W& j! o3 b! l. Y" T& n e
import org.apache.lucene.analysis.standard.StandardAnalyzer;
Q. z+ Y$ d R: nimport org.apache.lucene.document.Document;* a/ |& R: c$ ^# h
import org.apache.lucene.index.DirectoryReader;
3 |7 Y9 C) S1 N' X" l2 qimport org.apache.lucene.index.IndexReader;
3 w6 w9 h a- I9 R3 Kimport org.apache.lucene.queryparser.classic.QueryParser;( T: x$ U2 h e+ N7 E/ e. ^( ^
import org.apache.lucene.search.IndexSearcher;* d, l1 k6 @6 Z ^& W
import org.apache.lucene.search.Query;
# f9 w8 y9 r) D8 A2 d$ E8 z; pimport org.apache.lucene.search.ScoreDoc;
% `( l/ e! x5 D! p/ rimport org.apache.lucene.search.TopDocs;8 z8 x( x: U% M7 {! A+ V. x4 Y
import org.apache.lucene.store.Directory;; _2 @5 G4 F% W% r; Z3 O. U
import org.apache.lucene.store.FSDirectory;2 ^7 y4 i1 _$ v
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public class Searcher {
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public static void search(String indexDir,String q)throws Exception{, u7 x1 i8 K7 x( b) B7 z' r
Directory dir=FSDirectory.open(Paths.get(indexDir));
# P+ R$ v2 q. F8 ^+ K5 L! R IndexReader reader=DirectoryReader.open(dir);
' g, }2 @/ E$ ?' b IndexSearcher is=new IndexSearcher(reader);
R1 W( o5 F ~* G Analyzer analyzer=new StandardAnalyzer(); // 标准分词器- Y4 ~" _7 c8 d9 {3 E+ T Y0 e
QueryParser parser=new QueryParser("contents", analyzer);
$ Y: t4 C- X$ c Query query=parser.parse(q);. @- W* w. I- A7 j7 V. k$ R
long start=System.currentTimeMillis();% u7 d3 p0 ^& y7 j- r p
TopDocs hits=is.search(query, 10);1 H8 p2 H& v- ?( D D
long end=System.currentTimeMillis();! [5 w/ m% }8 V0 y B$ ?
System.out.println("匹配 "+q+" ,总共花费"+(end-start)+"毫秒"+"查询到"+hits.totalHits+"个记录");% m1 H; I6 J* N5 o
for(ScoreDoc scoreDoc:hits.scoreDocs){
; y) a5 E. @( ` Document doc=is.doc(scoreDoc.doc);! p9 _8 \ A% _0 b' d. u
System.out.println(doc.get("fullPath"));1 ~: D' O4 W3 l# `+ q9 B9 ^' n
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reader.close();
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public static void main(String[] args) {
( D: H2 f, m E* X A String indexDir="D:\\lucene";
( E9 w. x; h2 R. J Z4 G3 _! c String q="Zygmunt Saloni";
5 r* j8 S R, v1 C- x: V; q try {3 F- p" o V; e
search(indexDir,q);4 I3 u1 n7 G% N5 h
} catch (Exception e) {0 _$ X3 c0 h2 g
// TODO Auto-generated catch block
5 S0 s2 o% B& T& D$ V9 Z e.printStackTrace();
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