Create Excel file in java using PoI

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

package com.howto;

import java.io.File;

import java.io.FileOutputStream;

import java.util.ArrayList;

import java.util.Collection;

import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.ss.usermodel.Cell;

import org.apache.poi.ss.usermodel.Row;

/*

* Here we will learn how to create Excel file and header for the same.

*/

public class CreateExcelFile {

int rownum = 0;

HSSFSheet firstSheet;

Collection<File> files;

HSSFWorkbook workbook;

File exactFile;

{

workbook = new HSSFWorkbook();

firstSheet = workbook.createSheet("FIRST SHEET");

Row headerRow = firstSheet.createRow(rownum);

headerRow.setHeightInPoints(40);

}

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

List<String> headerRow = new ArrayList<String>();

headerRow.add("Employee No");

headerRow.add("Employee Name");

headerRow.add("Employee Address");

List<String> firstRow = new ArrayList<String>();

firstRow.add("1111");

firstRow.add("Gautam");

firstRow.add("India");

List<List> recordToAdd = new ArrayList<List>();

recordToAdd.add(headerRow);

recordToAdd.add(firstRow);

CreateExcelFile cls = new CreateExcelFile(recordToAdd);

cls.createExcelFile();

}

void createExcelFile(){

FileOutputStream fos = null;

try {

fos=new FileOutputStream(new File("ExcelSheet.xls"));

HSSFCellStyle hsfstyle=workbook.createCellStyle();

hsfstyle.setBorderBottom((short) 1);

hsfstyle.setFillBackgroundColor((short)245);

workbook.write(fos);

} catch (Exception e) {

e.printStackTrace();

}

}

CreateExcelFile(List<List> l1) throws Exception {

try {

for (int j = 0; j < l1.size(); j++) {

Row row = firstSheet.createRow(rownum);

List<String> l2= l1.get(j);

for(int k=0; k<l2.size(); k++)

{

Cell cell = row.createCell(k);

cell.setCellValue(l2.get(k));

}

rownum++;

}

} catch (Exception e) {

e.printStackTrace();

} finally {

}

}

}