基于Lucene框架 Compass 的使用例子

Compass 资源下载地址：

http://sourceforge.net/projects/compass/files/compass/2.2.0/compass-2.2.0-with-dependencies.zip/download

选取三个jar包：commons-logging.jar, compass-2.2.0.jar, lucene-core.jar.

使用OSEM(Object/SearchEngine Mapping)映射方案

 

映射的实体对象Book.java：

 

01 package com.sse.first;
02
03 import org.compass.annotations.Index;
04 import org.compass.annotations.Searchable;
05 import org.compass.annotations.SearchableId;
06 import org.compass.annotations.SearchableProperty;
07 import org.compass.annotations.Store;
08
09 @Searchable
10 public class Book {
11
12 private String id;
13 private String title;
14 private String author;
15 private float price;
16
17 public Book(){}
18
19 public Book(String id, String title, String author, float price){
20 this.id = id;
21 this.title = title;
22 this.author = author;
23 this.price = price;
24 }
25
26 @SearchableId
27 public String getId() {
28 return id;
29 }
30 public void setId(String id) {
31 this.id = id;
32 }
33
34 @SearchableProperty(boost=2.0F, index=Index.TOKENIZED, store=Store.YES)
35 public String getTitle() {
36 return title;
37 }
38 public void setTitle(String title) {
39 this.title = title;
40 }
41
42 @SearchableProperty(index=Index.TOKENIZED, store=Store.YES)
43 public String getAuthor() {
44 return author;
45 }
46 public void setAuthor(String author) {
47 this.author = author;
48 }
49
50 @SearchableProperty(index=Index.NO, store=Store.YES)
51 public float getPrice() {
52 return price;
53 }
54 public void setPrice(float price) {
55 this.price = price;
56 }
57
58 @Override
59 public String toString() {
60 return "[ "+ id +" ] " + title +" -- " + author + " $ " + price;
61 }
62
63
64 }

 

主搜索服务Searcher.java:

package com.sse.first;

001 import java.util.ArrayList;
002 import java.util.Collections;
003 import java.util.List;
004
005 import org.compass.annotations.config.CompassAnnotationsConfiguration;
006 import org.compass.core.Compass;
007 import org.compass.core.CompassException;
008 import org.compass.core.CompassHits;
009 import org.compass.core.CompassSession;
010 import org.compass.core.CompassTransaction;
011
012 public class Searcher {
013
014 private Compass compass;
015
016 /**
017 * 初始化检索器
018 * @param path
019 */
020 public Searcher(String path){
021 compass = new CompassAnnotationsConfiguration()
022 .setConnection(path)
023 .addClass(Book.class)
024 .setSetting("compass.engine.highlighter.default.formatter.simple.pre", "<b>")
025 .setSetting("compass.engine.highlighter.default.formatter.simple.post", "</b>")
026 .buildCompass();
027
028 Runtime.getRuntime().addShutdownHook(new Thread(){
029 public void run(){
030 compass.close();
031 }
032 });
033 }
034
035 /**
036 * 建立数据索引
037 * @param book
038 */
039 public void index(Book book){
040 System.out.println("index book : " + book);
041 CompassSession session = null;
042 CompassTransaction tx = null;
043
044 try {
045 session = compass.openSession();
046 tx = session.beginTransaction();
047
048 session.create(book);
049 tx.commit();
050 } catch (CompassException e) {
051 tx.rollback();
052 e.printStackTrace();
053 } finally{
054 if ( session != null )
055 session.close();
056 }
057
058 }
059
060 /**
061 * 删除索引
062 * @param book
063 */
064 public void unIndex(Book book){
065 CompassSession session = null;
066 CompassTransaction tx = null;
067
068 try {
069 session = compass.openSession();
070 tx = session.beginTransaction();
071
072 session.delete(book);
073 tx.commit();
074 } catch (CompassException e) {
075 tx.rollback();
076 e.printStackTrace();
077 } finally{
078 if ( session != null )
079 session.close();
080 }
081
082 }
083
084 /**
085 * 重置对象索引
086 * @param book
087 */
088 public void reIndex(Book book){
089 unIndex(book);
090 index(book);
091 }
092
093 /**
094 * 查询
095 * @param q
096 * @return
097 */
098 @SuppressWarnings("unchecked")
099 public List<Book> search(String q){
100 CompassSession session = null;
101 CompassTransaction tx = null;
102
103 try {
104 session = compass.openSession();
105 tx = session.beginTransaction();
106 CompassHits hits = session.find(q);
107
108 int n = hits.length();
109 if ( n == 0 )
110 return Collections.EMPTY_LIST;
111
112 List<Book> books = new ArrayList<Book>(n);
113 for (int i = 0; i < n; i++)
114 books.add((Book)hits.data(i));
115
116 hits.close();
117 tx.commit();
118 return books;
119 } catch (CompassException e) {
120 tx.rollback();
121 e.printStackTrace();
122 }
123 return Collections.EMPTY_LIST;
124 }
125 }

 

 

测试主入口main.java:

001 package com.sse.first;
002
003 import java.io.BufferedReader;
004 import java.io.File;
005 import java.io.InputStreamReader;
006 import java.util.ArrayList;
007 import java.util.Iterator;
008 import java.util.List;
009 import java.util.UUID;
010
011 import com.Const;
012
013 //import javax.swing.JOptionPane;
014
015 public class Main {
016
017 static List<Book> db = new ArrayList<Book>();
018 static Searcher search = new Searcher(Const.indexPath);
019
020 public static void main(String[] args) {
021 // deleteAllBooks();
022
023 add(new Book(UUID.randomUUID().toString(), "Thinking in Java", "Bruce", 10.9f));
024 add(new Book(UUID.randomUUID().toString(), "Effective Java", "Joshua", 12.4f));
025 add(new Book(UUID.randomUUID().toString(), "Java Thread Programming", "Pail", 25.6f));
026
027 Runtime.getRuntime().addShutdownHook(new Thread(){
028 public void run(){
029 deleteAllIndex(null);
030 }
031 });
032
033 int n;
034 do{
035 n = displaySelection();
036 switch(n){
037 case 1 :
038 listBooks();
039 break;
040 case 2 :
041 addBook();
042 break;
043 case 3 :
044 deleteBook();
045 break;
046 case 4 :
047 searchBook();
048 break;
049 case 5 :
050 return;
051