简单搜索引擎设计和Java源代码.docx

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1、Asimplesearchenginewiththefollowingfeatures:Includedinthepackage:sourcecode:SimpleSearchEngine.javaSimpleSearchEngineImpl.javaSimpleSearchEngineTest.javareadme:thisfilestopWords:thestopwordfilesearchFiles/:adirectorythatcontainsabunchoftestfilesUsage:1.SimpleSearchEngineTes

2、t.javacanbemodifiedtoaddmoredocumentsandaddnewqueries.1.compilethecode2.Torun:java-cp.SimpleSearchEngineTestFeatures:1.buildinvertedindexfortermsindocumentsandstoreinanindexfile.Theindexwillbeupdatedasmoredocumentsareadded.Andtheindexisloadedintomemoryduringstartup2.examine

3、stopwords3.simplequerybysplittingthequerystringintowordsandreturningthelistofthenamesofdocumentswithoneormorewordsinthem4.simplerankingofthesearchresultbasedonthenumberofsearchwordsinthedocumentsPreparation:1.adocumentfolderwhereallthedocumentsresides,assumingsearchFiles/in

4、thetest.2.thepathoftheindexfile.AnindexfilehastheinvertedindexoftermmappedtoalistofdocIds.Thisindexwillbeupdatedandthefilewillbeupdatedasdocumentsareadded.3.thepathofadocumentnameindexfile.ThisfilehasthedocIdtodocNamemapping.Thisfilewillbeupdatedasdocumentsareadded.4.astopw

5、ordfilewiththestopwords.Anexampleisgiven.SimpleSearchEngine.javaimportjava.util.List;/***Asimplesearchengine***/publicinterfaceSimpleSearchEngine{/**simplequerybysplittingthequeryintosearchtermsandlookinguptheindex,*rankingresultsbythenumberofsearchtermsappearinginadocument

6、**@returnlistofdocumentnames***/publicListquery(StringqueryStr);/***addadocumentandupdatetheindex**@paramdocNamedocumentname*/publicvoidaddDoc(StringdocName);}SimpleSearchEngineImpl.javaimportjava.io.BufferedReader;importjava.io.File;importjava.io.FileReader;importj

7、ava.io.FileWriter;importjava.io.IOException;importjava.util.Comparator;importjava.util.HashMap;importjava.util.HashSet;importjava.util.Iterator;importjava.util.List;importjava.util.Map;importjava.util.Set;importjava.util.TreeMap;importjava.util.TreeSet;/***Asimplesearchengi

8、newiththefollowingfeatures:**1.buildinvertedindexfortermsindocumentsandstoreinanin