segment(段)的信息
該類比較簡單，貼出其全部代碼
import org.apache.lucene.store.Directory;
final class SegmentInfo {
public String name; //在索引目錄中唯一的名稱
public int docCount; // 該段中doc的數目
public Directory dir; // 該段所存在的Dirrectory
public SegmentInfo(String name, int docCount, Directory dir) {
this.name = name;
this.docCount = docCount;
this.dir = dir;
}
}