如何使用java填写Excel文件

我有以下代码填写Excel文件,其中包含我使用Jsoup从Internet获得的信息.

package knvbj;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.nodes.TextNode;
import org.jsoup.select.Elements;

public class KNVBJ {

private static int Clnummer=1;
    public static void main(String[] args) throws IOException {
       FileOutputStream out = new FileOutputStream("/Users/muratcanpinar/Downloads/KNVBJ/build/classes/knvbj/ClubInformation.xlsx");
        List urlList = ReadXlsx.readXlsx();
        urlList.get(1);
        for (String url : urlList) {
            System.out.println("url: " + url);
        }

        for (int i = 0; i < urlList.size(); i++) {
            Document doc = Jsoup.connect(urlList.get(i))
                    .data("query", "Java")
                    .userAgent("Mozilla")
                    .cookie("auth", "token")
                    .timeout(3000)
                    .post();

            Element content1 = doc.getElementsByClass("details").first();
            String body = content1.toString();
            Document docb = Jsoup.parseBodyFragment(body);
            Element bbd = docb.body();
            String kkj = bbd.toString();                

            Document finalDocument = Jsoup.parse(kkj);
            Element ClubName = finalDocument.getElementsByClass("title").first();
            String NameOfClub = ClubName.text();
            System.out.println(NameOfClub);    

            Element Adres = finalDocument.getElementsByClass("text").get(1);

            String[] addressParts = Adres.html().split("
");
            String SplitString;
            String PlaatsName;
            String Straat;
            String telNo;
            String Accommodatie;
            String Postcode;                

            Accommodatie = addressParts[0].trim();
            Straat = addressParts[1].trim();
            SplitString = addressParts[2].trim();
            telNo = addressParts[3].trim();

            String splitted[]= SplitString.split(" ");
            Postcode = splitted[0];
            PlaatsName = splitted[1];

            System.out.println(Accommodatie + " " + Straat + " " + " postcode " + Postcode + " Plaatsname " + PlaatsName+ " "+ telNo);

            Elements anchors = finalDocument.getElementsByTag("a");
            String email = anchors.get(1).text();    

            String fname = "/Users/muratcanpinar/Downloads/KNVBJ/src/knvbj/Voetbalclubs.xlsx";
            InputStream inp = new FileInputStream(fname);                       

            Workbook wb = new XSSFWorkbook(inp);

            Sheet sheet = wb.getSheetAt(0);
            Row r1 = sheet.getRow(0);

            r1.createCell(Clnummer++).setCellValue(NameOfClub);
            r1.createCell(Clnummer++).setCellValue(Accommodatie);
            r1.createCell(Clnummer++).setCellValue(Straat);
            r1.createCell(Clnummer++).setCellValue(Postcode);
            r1.createCell(Clnummer++).setCellValue(PlaatsName);
            r1.createCell(Clnummer++).setCellValue(telNo);
            r1.createCell(Clnummer++).setCellValue(email);

            wb.write(out);               
        }
  out.close();
    }           
}

使用上面的代码我可以填充一行,然后得到这个错误

Exception in thread "main" org.apache.poi.openxml4j.exceptions.OpenXML4JRuntimeException: Fail to save: an error occurs while saving the package : The part /docProps/app.xml fail to be saved in the stream with marshaller org.apache.poi.openxml4j.opc.internal.marshallers.DefaultMarshaller@f46fdc1
    at org.apache.poi.openxml4j.opc.ZipPackage.saveImpl(ZipPackage.java:479)
    at org.apache.poi.openxml4j.opc.OPCPackage.save(OPCPackage.java:1414)
    at org.apache.poi.POIXMLDocument.write(POIXMLDocument.java:179)
    at knvbj.KNVBJ.main(KNVBJ.java:101)
Caused by: org.apache.poi.openxml4j.exceptions.OpenXML4JException: The part /docProps/app.xml fail to be saved in the stream with marshaller org.apache.poi.openxml4j.opc.internal.marshallers.DefaultMarshaller@f46fdc1
    at org.apache.poi.openxml4j.opc.ZipPackage.saveImpl(ZipPackage.java:470)
    ... 3 more
Java Result: 1

有人能告诉我我在做什么吗？非常感谢.