（3）Lucene索引管理包

IndexWriter

+getUseCompoundField()+setUseCompoundField()+setSimilarity()+getSimilarity()+IndexWriter()+close()+finalizer()+getAnalyzer()+docCount()+addDocument()+addDocument()+getSegmentCounter()+newSegmentName()+optimize()+addIndexes()addIndexes()+flushRamSegments()+maybeMegeSegments()

FieldsWriter

+FieldWriter()+close()+addDocument()

DocumentWriter

-maxFieldLength:int-postingTable:java.util.Hash-fieldLengths:int-fieldPositions[]:int-fieldBoosts[]:float

+DocumentWriter()

TermInfosWriter

-FORMAT:int =-2-size:long =0-indexInterval:int =128-skipInterval:int = 16-lastIndexPointer:long = 0