问使用java从excel获取图像

EN

import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.PictureData;

import java.io.InputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import java.util.List;
import java.util.Iterator;

class ReadExcelImages {

 public static void main(String[] args) throws Exception{

  InputStream inp = new FileInputStream("test.xls");
  //InputStream inp = new FileInputStream("test.xlsx");

  Workbook workbook = WorkbookFactory.create(inp);

  List lst = workbook.getAllPictures();
  int i = 1;
  for (Iterator it = lst.iterator(); it.hasNext(); ) {
   PictureData pict = (PictureData)it.next();
   String ext = pict.suggestFileExtension();
   byte[] data = pict.getData();
   if (ext.equals("png")){
    FileOutputStream out = new FileOutputStream("pict" + i++ + ".png");
    out.write(data);
    out.close();
   } else if (ext.equals("jpeg")) {
    FileOutputStream out = new FileOutputStream("pict" + i++ + ".jpeg");
    out.write(data);
    out.close();
   }
  }
 }
}