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1、lucene.apache.org
% t* X7 E/ I6 ]* K4 c y, _4 F% c2、5.3.1版本
/ B' v: W; _/ K; b! O3、源码:
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<dependency>) I# z/ f6 U4 G1 T/ k
<groupId>org.apache.lucene</groupId>
' |3 r0 G- `# z: ?, N) ? <artifactId>lucene-core</artifactId>
9 {" N2 K' @5 t$ H( [/ C <version>5.3.1</version>
: V3 K) v* h p: {2 }6 c </dependency>+ } N% j# [3 O! N1 \9 _+ ^3 J
1 `$ Z" ], D* k8 e <dependency>0 w+ i! r; ^! T$ G1 O& N) \
<groupId>org.apache.lucene</groupId>6 y! `' Q8 P6 Q, |, h1 A( _6 g
<artifactId>lucene-queryparser</artifactId>7 H" W+ b8 Q7 F. Z
<version>5.3.1</version>
4 e7 q3 B/ J! F8 v </dependency>
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6 W3 x9 `4 P2 D. y <dependency>
) [; m! K& h6 x' r M' b <groupId>org.apache.lucene</groupId>7 H& m- c. P5 Q& R0 i) q3 T
<artifactId>lucene-analyzers-common</artifactId>7 Z$ T- ^6 a" g6 J3 W5 n, @
<version>5.3.1</version>
1 n8 {- K9 y% M, ~1 i: G7 D- z/ C* r </dependency>
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import java.io.File;
2 _; g3 s9 y: Q8 Yimport java.io.FileReader;
3 r/ v+ o5 W3 _% A/ x w- R0 Dimport java.nio.file.Paths;# z2 L* M) b3 J, G" y0 {/ @
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import org.apache.lucene.analysis.Analyzer;& P% u: Y# g+ `, w3 Z
import org.apache.lucene.analysis.standard.StandardAnalyzer;) ~% t2 \( J+ k8 b6 e
import org.apache.lucene.document.Document;
; M! {$ b& \$ x% G$ Ximport org.apache.lucene.document.Field;
" R( E- L9 d5 [* m" c2 Z `import org.apache.lucene.document.TextField;: n( @: e0 ~ _. d( r2 O
import org.apache.lucene.index.IndexWriter;
# O) j# e' |& w- U+ m: Yimport org.apache.lucene.index.IndexWriterConfig;! h7 j4 d. B; r, i7 Y4 I2 d
import org.apache.lucene.store.Directory;' w% j. R8 e2 U O' d5 A8 B
import org.apache.lucene.store.FSDirectory;9 E" L- I2 R* Y3 a( D
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public class Indexer {
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7 m2 @0 O1 f. [1 E9 r private IndexWriter writer; // 写索引实例4 ]/ J, O' S) e( G4 I
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/**
, i* W4 `5 A! Q" ? * 构造方法 实例化IndexWriter
' m1 {8 c. U9 Z9 o) c * @param indexDir
3 U% p5 C4 B' N9 S4 H# P9 ?. m$ G# Q * @throws Exception" T7 l0 ^9 i* @6 e3 ~. Y
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public Indexer(String indexDir)throws Exception{0 X1 e0 x! J, Q6 N, R! L- I4 _( J
Directory dir=FSDirectory.open(Paths.get(indexDir));
6 Y/ R% D" [+ G% f4 U h2 d Analyzer analyzer=new StandardAnalyzer(); // 标准分词器9 C) C3 V. d+ _6 w! Z% A
IndexWriterConfig iwc=new IndexWriterConfig(analyzer);
- E& s+ C# o% g% @ writer=new IndexWriter(dir, iwc);
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7 E; n4 N8 }7 Z( Y4 s /**" d$ q/ m3 |; Y( r6 [- J
* 关闭写索引
& k. N0 v) T& u2 R2 ]1 z/ X$ T2 J/ e# f5 [ * @throws Exception
! J* F9 V! A& e */
1 `0 f4 L5 M7 q1 K, T9 {1 R% I' z7 E public void close()throws Exception{
, b. n) b" g( o. S1 K& ~2 j/ `- ~ writer.close();
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+ g }& j7 x) T$ B r' l* `% t% N; m /**
% M+ I: Y- Q/ K; k" e2 O * 索引指定目录的所有文件
8 r+ a' U- {* C: E * @param dataDir
/ q# U: E0 H( ~ * @throws Exception
9 g/ T' k+ H* E! U q */
: ?- g' f- t/ E) [, h! r$ z5 M5 G/ M public int index(String dataDir)throws Exception{. u. H6 l' M. |* _0 y
File []files=new File(dataDir).listFiles();
$ r6 n; u' M8 M for(File f:files){+ t0 A( _: m6 }3 F# `
indexFile(f);
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return writer.numDocs();5 y! i, ]$ Q+ R- ?2 x" B
}
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! E1 e5 w2 c# D+ G, W3 f, k6 q /**
# z# \! t9 x; U+ k" d9 B * 索引指定文件6 E" O; s2 |, Y- d
* @param f5 P- J3 A( y5 s5 T) L
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private void indexFile(File f) throws Exception{
* r5 F9 Y4 F; t System.out.println("索引文件:"+f.getCanonicalPath());$ B( Y6 k* b4 n7 b* e
Document doc=getDocument(f);: a ~, ^- ^# ]. o
writer.addDocument(doc);
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: n& U9 ^* C' m; S' p /**
7 T# E2 K; ]2 N i1 Q/ C$ G * 获取文档,文档里再设置每个字段
0 O1 G/ O( S! Z. ` * @param f
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private Document getDocument(File f)throws Exception {
9 O0 `# B/ s/ W; Z Document doc=new Document();* H# ?9 a+ O( \
doc.add(new TextField("contents",new FileReader(f)));: g. R/ ~- f! F* d2 g
doc.add(new TextField("fileName", f.getName(),Field.Store.YES));
6 t1 }) Q1 h/ _0 E9 L0 y$ ] doc.add(new TextField("fullPath",f.getCanonicalPath(),Field.Store.YES));
3 ] E) a0 s- u return doc;" |, B* S0 H4 A" D
}
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$ t) T1 n6 t( z% A U public static void main(String[] args) {4 `/ O0 `) ^4 d, T8 f
String indexDir="D:\\lucene";
& J2 P q+ j" q6 G String dataDir="D:\\lucene\\data";' j; o S3 K3 p1 j4 c! D$ I
Indexer indexer=null;' n: P8 W& q7 [- t
int numIndexed=0;
- r) Y! Z& r3 T long start=System.currentTimeMillis();
, m7 h* L. n1 [3 k, K9 L% Q; A try {
- S8 g; l7 `1 M8 m- T, ~) G indexer = new Indexer(indexDir);2 {' h3 ^1 I2 w# D7 b# @
numIndexed=indexer.index(dataDir);
& n6 ?% |4 c/ l4 y: \9 Q } catch (Exception e) {& t" J, y- `- N4 u3 e! _
// TODO Auto-generated catch block
' f9 T: l7 S' \( r3 h8 C e.printStackTrace();
$ |! g" y. j' B) F8 w/ I }finally{' g% d" z* u4 Y" V: \
try {4 i" U" E# z. x% u" E
indexer.close();
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// TODO Auto-generated catch block" ?6 e% b/ W/ j: P* T
e.printStackTrace();
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1 V$ |+ _, E( N' h- Y: a long end=System.currentTimeMillis();2 G/ T* g2 N! z
System.out.println("索引:"+numIndexed+" 个文件 花费了"+(end-start)+" 毫秒");
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}
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' ^0 K/ I9 X# s1 K8 B( u" D(2)、查询:
" q" F( g* d! T1 ^import java.nio.file.Paths;7 r, Q- R! Y- G- I. q4 ]% N$ t
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import org.apache.lucene.analysis.Analyzer;
) | z9 [2 Q4 j& E3 Mimport org.apache.lucene.analysis.standard.StandardAnalyzer;
3 K* f, f6 E, q3 H: iimport org.apache.lucene.document.Document;
+ X' S5 ]/ }5 }" f* N6 wimport org.apache.lucene.index.DirectoryReader;" r" \. m, E: d5 Z" R' j
import org.apache.lucene.index.IndexReader;
g. B% F* w* p/ e6 x' ~! Simport org.apache.lucene.queryparser.classic.QueryParser;
# \0 ?; b; A# {3 N% f* Vimport org.apache.lucene.search.IndexSearcher;0 s( P- }* s2 P4 G# g! H! w) `
import org.apache.lucene.search.Query;
7 F& \6 m1 t ] Kimport org.apache.lucene.search.ScoreDoc;
) |$ w% ^8 v* {4 z& ]; Iimport org.apache.lucene.search.TopDocs;
8 j. o+ Y3 t8 s2 ximport org.apache.lucene.store.Directory;! T9 ~7 _6 M9 R0 ?( |6 U6 X
import org.apache.lucene.store.FSDirectory;3 P6 K- U# d& |8 W* L P2 L2 x
$ N+ r& V$ [) b fpublic class Searcher {
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: x8 x3 P2 \& B: O4 Q3 n2 D& d; {, l public static void search(String indexDir,String q)throws Exception{5 U/ f$ _. t. q' m4 G m: h! W' i
Directory dir=FSDirectory.open(Paths.get(indexDir));
. I: {9 ?% d# F IndexReader reader=DirectoryReader.open(dir);
# z: j1 K3 I' d2 s2 O; P3 Q IndexSearcher is=new IndexSearcher(reader);' l e/ F3 @0 }- f o
Analyzer analyzer=new StandardAnalyzer(); // 标准分词器
! L& `' f Q* Q: F9 G QueryParser parser=new QueryParser("contents", analyzer);
) H7 v! l; m2 W" | Query query=parser.parse(q);
9 V S* I# s( B5 O; ~ long start=System.currentTimeMillis();9 j# |2 m# g( x( V4 _
TopDocs hits=is.search(query, 10);
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System.out.println("匹配 "+q+" ,总共花费"+(end-start)+"毫秒"+"查询到"+hits.totalHits+"个记录");
, w; d7 e) _# p0 `" R7 ~ for(ScoreDoc scoreDoc:hits.scoreDocs){
, `# p0 ~& C/ l5 B! Q& _) S Document doc=is.doc(scoreDoc.doc);7 i9 z" n, O0 R1 K/ D- D
System.out.println(doc.get("fullPath")); {% V5 [ C; j8 K7 s4 t
}
8 V) z4 m, ]% ], F* r reader.close();) y' p. @3 m' a
}
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public static void main(String[] args) {
+ h2 b) b6 t2 l+ A! g: I! ^3 } String indexDir="D:\\lucene";* k+ D; _9 g) x( ^
String q="Zygmunt Saloni";
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search(indexDir,q); _8 R2 i! \" E
} catch (Exception e) {
+ N5 F) B" K5 [ // TODO Auto-generated catch block$ U0 @* t3 g. m+ c
e.printStackTrace();
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