lucene工具类-升级索引

package test;
import java.io.File;
import java.io.IOException;

import org.apache.lucene.index.IndexUpgrader;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;

public class ConvertFromThree {

public static void main(String[] args) {
ConvertFromThree c = new ConvertFromThree();
c.upgrade();
}
private final String INDEX_PATH = "D:/newindex";
public void upgrade(){
try {
File dir = new File(INDEX_PATH);
String path = "";
String[] dirList = dir.list();
for (String d:dirList){
path = INDEX_PATH + "/" + d;
System.out.println(path);
IndexUpgrader t = new IndexUpgrader(FSDirectory.open(new File(path)),
Version.LUCENE_47,System.out,true);
t.upgrade();
System.out.println(path+" Done.");
}
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("All Done.");
}
}