用java poi 把一个txt里面的内容导入excel

txt的内容为句子，每一行一个句子，导入Excel，只需要一列。应该怎么弄啊？

参考代码：
public class ReadWriteXL
{
public static void main(String[] args) throws InvalidFormatException, IOException{
ArrayList arr=new ArrayList();
File f=new File("F:\\temp\\TEXT\\email.txt");

Scanner in=new Scanner(f);
System.out.println("Read Data From The Txt file ");
while(in.hasNext())
{

arr.add(in.nextLine());
}
System.out.println("Data From ArrayList");
System.out.println(arr);

System.out.println("Write data to an Excel Sheet");
FileOutputStream fos=new FileOutputStream("F:/temp/1.xls");
HSSFWorkbook workBook = new HSSFWorkbook();
HSSFSheet spreadSheet = workBook.createSheet("email");
HSSFRow row;
HSSFCell cell;
for(int i=0;i row = spreadSheet.createRow((short) i);
cell = row.createCell(i);
System.out.println(arr.get(i));
cell.setCellValue(arr.get(i).toString());
}
System.out.println("Done");
workBook.write(fos);
arr.clear();
System.out.println("ReadIng From Excel Sheet");

FileInputStream fis = null;
fis = new FileInputStream("F:/temp/1.xls");

HSSFWorkbook workbook = new HSSFWorkbook(fis);
HSSFSheet sheet = workbook.getSheetAt(0);
Iterator rows = sheet.rowIterator();

while (rows.hasNext()) {
HSSFRow row1 = (HSSFRow) rows.next();
Iterator cells = row1.cellIterator();
while (cells.hasNext()) {
HSSFCell cell1 = (HSSFCell) cells.next();
arr.add(cell1);
}
}
System.out.println(arr);

}}