简述:
本教程为系列教程,最近在看Lucene的一个视频教程,感觉不错,可惜的是所讲的版本为3.5,由于Lucene不同的版本差距较大,因此当即决定写一个新版本的系列教程5.0版本,但是又怕从3.5跨到5.0跨度太大,毕竟自己也没有使用过Lucene,因此再插入一个中间版本4.5,所以,此系列教程打算把3.5版本,4.5版本,5.0版本都给出个例子,方便大家学习,也方便自己复习。
注:3.5版本并非原创,如下步骤的思路并非原创,都是我在视频教程上学到的,其他均为原创,以后跟进的教程也是如此
注:由于此教程为系列教程,pom文件会越来越大,不再单独摘出所需要的jar包,需要添加新的jar包我会在pom文件上方列出
注:由于Lucene5.0版本是基于JDK1.7开发的,所以想学习的同学请配置1.7及以上的版本
创建索引可分为主要的几步,我自己试验过,不同的版本间会有些不同,但是跟着如下的几大步骤一步一步写,问题不会太大。
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.darren.lucene35.helloworld</groupId> <artifactId>lucene35_helloworld</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>lucene35_helloworld</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <lucene.version>3.5.0</lucene.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-core</artifactId> <version>${lucene.version}</version> </dependency> </dependencies> </project>例子代码如下:
package com.darren.lucene35; import java.io.File; import java.io.FileReader; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.document.Document; import org.apache.lucene.document.Field; import org.apache.lucene.index.IndexReader; import org.apache.lucene.index.IndexWriter; import org.apache.lucene.index.IndexWriterConfig; import org.apache.lucene.queryParser.QueryParser; import org.apache.lucene.search.IndexSearcher; import org.apache.lucene.search.Query; import org.apache.lucene.search.ScoreDoc; import org.apache.lucene.search.TopDocs; import org.apache.lucene.store.Directory; import org.apache.lucene.store.FSDirectory; import org.apache.lucene.util.Version; public class HelloLucene { /** * 建立索引 */ public void index() { IndexWriter indexWriter = null; try { // 1、创建Directory // 建立在内存中 // Directory directory = new RAMDirectory(); // 建立在硬盘式 Directory directory = FSDirectory.open(new File("F:/test/lucene/index")); // 2、创建IndexWriter // 使用默认的标准分词器 Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_35); IndexWriterConfig indexWriterConfig = new IndexWriterConfig(Version.LUCENE_35, analyzer); indexWriter = new IndexWriter(directory, indexWriterConfig); File dFile = new File("F:/test/lucene/document"); File[] files = dFile.listFiles(); for (File file : files) { // 3、创建Document对象 Document document = new Document(); // 4、为Document添加Field document.add(new Field("content", new FileReader(file))); document.add(new Field("filename", file.getName(), Field.Store.YES, Field.Index.NOT_ANALYZED)); document.add(new Field("filepath", file.getAbsolutePath(), Field.Store.YES, Field.Index.NOT_ANALYZED)); // 5、通过IndexWriter添加文档到索引中 indexWriter.addDocument(document); } } catch (Exception e) { e.printStackTrace(); } finally { try { if (indexWriter != null) { indexWriter.close(); } } catch (Exception e1) { e1.printStackTrace(); } } } }
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.darren.lucene45.helloworld</groupId> <artifactId>lucene45_helloworld</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>lucene45_helloworld</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <lucene.version>4.5.1</lucene.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-core</artifactId> <version>${lucene.version}</version> </dependency> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-analyzers-common</artifactId> <version>${lucene.version}</version> </dependency> </dependencies> </project>例子代码如下:
package com.darren.lucene45; import java.io.File; import java.io.FileReader; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.document.Document; import org.apache.lucene.document.Field; import org.apache.lucene.document.TextField; import org.apache.lucene.index.IndexWriter; import org.apache.lucene.index.IndexWriterConfig; import org.apache.lucene.store.Directory; import org.apache.lucene.store.FSDirectory; import org.apache.lucene.util.Version; public class HelloLucene { /** * 建立索引 */ public void index() { IndexWriter indexWriter = null; try { // 1、创建Directory Directory directory = FSDirectory.open(new File("F:/test/lucene/index")); // 2、创建IndexWriter /** * 注意StandardAnalyzer与3.5版本的不同: * * StandardAnalyzer不在lucene-core包中而在lucene-analyzers-common包中 从4.0版本以后分离 */ Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_45); IndexWriterConfig indexWriterConfig = new IndexWriterConfig(Version.LUCENE_45, analyzer); indexWriter = new IndexWriter(directory, indexWriterConfig); File dFile = new File("F:/test/lucene/document"); File[] files = dFile.listFiles(); for (File file : files) { // 3、创建Document对象 Document document = new Document(); // 4、为Document添加Field /** * 注意Field与3.5版本的不同:两个参数的构造器已过时,使用如下构造器 */ // 第三个参数是FieldType 但是定义在TextField中作为静态变量,看API也不好知道怎么写 document.add(new Field("content", new FileReader(file), TextField.TYPE_NOT_STORED)); document.add(new Field("filename", file.getName(), TextField.TYPE_STORED)); document.add(new Field("filepath", file.getAbsolutePath(), TextField.TYPE_STORED)); // 5、通过IndexWriter添加文档到索引中 indexWriter.addDocument(document); } } catch (Exception e) { e.printStackTrace(); } finally { try { if (indexWriter != null) { indexWriter.close(); } } catch (Exception e) { e.printStackTrace(); } } } }
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.darren.lucene50.helloworld</groupId> <artifactId>lucene50_helloworld</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>lucene50_helloworld</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <lucene.version>5.0.0</lucene.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-core</artifactId> <version>${lucene.version}</version> </dependency> <dependency> <groupId>org.apache.lucene</groupId> <artifactId>lucene-analyzers-common</artifactId> <version>${lucene.version}</version> </dependency> </dependencies> </project>例子代码如下:
package com.darren.lucene50; import java.io.File; import java.io.FileReader; import java.nio.file.FileSystems; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.document.Document; import org.apache.lucene.document.Field; import org.apache.lucene.document.TextField; import org.apache.lucene.index.IndexWriter; import org.apache.lucene.index.IndexWriterConfig; import org.apache.lucene.store.Directory; import org.apache.lucene.store.FSDirectory; public class HelloLucene { /** * 建立索引 */ public void index() { IndexWriter indexWriter = null; try { // 1、创建Directory /** * 注意open方法与3.5版本和4.5版本的不同: * * 这里不再接受一个File而是Path,使用的是JDK1.7的新特性,也就是说5.0版本是基于JDK1.7开发的 * * 如何获取Path,请参照 Java7新特性--Path http://blog.csdn.net/zpf336/article/details/45074445 * */ Directory directory = FSDirectory.open(FileSystems.getDefault().getPath("F:/test/lucene/index")); // 2、创建IndexWriter /** * 注意StandardAnalyzer与3.5版本的不同: * * StandardAnalyzer不在lucene-core包中而在lucene-analyzers-common包中 从4.0版本以后分离 * * 并且不需要提供版本号 */ Analyzer analyzer = new StandardAnalyzer(); /** * 注意IndexWriterConfig与3.5版本和4.5版本的不同: * * 不需要提供版本号 */ IndexWriterConfig indexWriterConfig = new IndexWriterConfig(analyzer); indexWriter = new IndexWriter(directory, indexWriterConfig); File dFile = new File("F:/test/lucene/document"); File[] files = dFile.listFiles(); for (File file : files) { // 3、创建Document对象 Document document = new Document(); // 4、为Document添加Field /** * 注意Field与3.5版本的不同:两个参数的构造器已过时,使用如下构造器 * * 但是和4.5版本是相同的 */ // 第三个参数是FieldType 但是定义在TextField中作为静态变量,看API也不好知道怎么写 document.add(new Field("content", new FileReader(file), TextField.TYPE_NOT_STORED)); document.add(new Field("filename", file.getName(), TextField.TYPE_STORED)); document.add(new Field("filepath", file.getAbsolutePath(), TextField.TYPE_STORED)); // 5、通过IndexWriter添加文档到索引中 indexWriter.addDocument(document); } } catch (Exception e) { e.printStackTrace(); } finally { try { if (indexWriter != null) { indexWriter.close(); } } catch (Exception e) { e.printStackTrace(); } } } }
package com.darren.lucene50; import org.junit.Test; public class HelloLuceneTest { @Test public void testIndex() { HelloLucene helloLucene = new HelloLucene(); helloLucene.index(); } }
原文地址:http://blog.csdn.net/zpf336/article/details/45074721