无法使用Java在xlsx文件中写入数据？

Question

I Have a data stored in variables and then i want to write my data to excel file(.xlsx). (ie) I use automation testing tools like selenium to get data from webpage and i store it in variable which i want to wrie in xlsx file

After a lot of google search I found many of users uses list or objects to write into .xlsx file.

I created a list and add my variable to that list and using looping statements (for loop) i checked whether my data is stored in list by printing it.

Then I created XSSFWorkbook and XSSFSheet and XSSFRow and XSSFCell to write data. I write a cell by using setCellValue method to my cell.

My code successfully creates a xlsx file and sheet in it but after execution i could not able to find any data in it.

Source code:

ArrayList<String> head = new ArrayList<String>();

head.add("Register Number");
head.add(subject1);
head.add(subject2);  //subject1 and subject2 are variable i created

System.out.println(head.get(1));  //To check if my list has value

XSSFWorkbook workbook = new XSSFWorkbook();                               
FileOutputStream fileOut = new FileOutputStream("/home/st.xlsx"); 

for (int i = 0; i < head.size(); i++) 

{

     XSSFRow  Row  = sheet1.createRow(1);
     XSSFCell cell = Row.createCell(1);                          
     cell.setCellValue(head.get(1));                             
     sheet1.autoSizeColumn(1);
}

workbook.write(fileOut);
fileOut.close();

I expect my code add data to my file.

Main thing is During execution when i try to open my .xlsx file it has data in it.

But after the complete execution i get with the empty xlsx file.

I don't know why i'm getting this and What wrong in my code?

Thanks in advance!

Answer 1

ArrayList<String> head = new ArrayList<String>();

head.add("Register Number");
head.add(subject1);
head.add(subject2);  // subject1 and subject2 are variable i created

System.out.println(head.get(0));  // To check if my list has value
System.out.println(head.get(1));  // To check if my list has value
System.out.println(head.get(2));  // To check if my list has value

XSSFWorkbook workbook = new XSSFWorkbook();                               
XSSFSheet sheet1 = wb.createSheet("Sheet1");

for (int r = 0; r < head.size(); r++) 
{

     XSSFRow row  = sheet1.createRow(r);
     XSSFCell cell = row.createCell(0);                          
     cell.setCellValue(head.get(r));                             
     sheet1.autoSizeColumn(0);
}

// Write this workbook to a FileOutputStream.
FileOutputStream fileOut = new FileOutputStream("/home/st.xlsx"); 
workbook.write(fileOut);
fileOut.flush();
fileOut.close();

More info here: https://gist.github.com/madan712/3912272