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Export Data to Excel in Java
You can easily export data to Microsoft Excel from various available sources. As a Java developer, you can export data from Arrays, JSON, or CSV to Excel programmatically.
- You can export data to Excel programmatically as described below:
- Export Array to Excel in Java
- Export ArrayList to Excel in Java
- Collection of Custom Objects to Excel in Java
- Export Data with Merged Cells in Java
- Copy Rows and Columns from one Excel file to Another in Java
- Export JSON Data to Excel in Java
- Get CSV Data in Excel using Java
// Open the source excel file.
Workbook srcWorkbook = new Workbook("C:\\Files\\Source_Workbook.xlsx");
// Instantiate the destination excel file.
Workbook destWorkbook = new Workbook();
// Get the first worksheet of the source workbook.
Worksheet srcWorksheet = srcWorkbook.getWorksheets().get(0);
// Get the first worksheet of the destination workbook.
Worksheet desWorksheet = destWorkbook.getWorksheets().get(0);
// Copy all the rows of the first worksheet of source Workbook to
// the first worksheet of destination Workbook.
desWorksheet.getCells().copyRows(srcWorksheet.getCells(), 0, 0, srcWorksheet.getCells().getMaxDisplayRange().getRowCount());
// Save the excel file.
destWorkbook.save("C:\\Files\\Destination_Workbook.xlsx");
// Open the source excel file.
Workbook srcWorkbook = new Workbook("C:\\Files\\Source_Workbook.xlsx");
// Instantiate the destination excel file.
Workbook destWorkbook = new Workbook();
// Get the first worksheet of the source workbook.
Worksheet srcWorksheet = srcWorkbook.getWorksheets().get(0);
// Get the first worksheet of the destination workbook.
Worksheet desWorksheet = destWorkbook.getWorksheets().get(0);
// Copy the second row of the source Workbook to the first row of destination Workbook.
desWorksheet.getCells().copyRow(srcWorksheet.getCells(), 1, 0);
// Copy the fourth row of the source Workbook to the second row of destination Workbook.
desWorksheet.getCells().copyRow(srcWorksheet.getCells(), 3, 1);
// Save the excel file.
destWorkbook.save("C:\\Files\\Destination_Workbook.xlsx");
// Initialize a Workbook object
Workbook workbook = new Workbook();
// Obtaining the reference of the worksheet
Worksheet worksheet = workbook.getWorksheets().get(0);
// Creating a two-dimensional array of integers
int[][] array2D = {
{ 1, 2 },
{ 3, 4 },
{ 5, 6 },
{ 7, 8 }
};
// Exporting the array of names to first row and first column vertically
worksheet.getCells().importArray(array2D, 0, 0);
// Saving the Excel file
workbook.save("C:\\Files\\output.xlsx");
// Initialize a Workbook object
Workbook workbook = new Workbook();
// Obtaining the reference of the worksheet
Worksheet worksheet = workbook.getWorksheets().get(0);
// Instantiating an ArrayList object
ArrayList<String> list = new ArrayList<String>();
// Add few names to the list as string values
list.add("Laurence Chen");
list.add("Roman Korchagin");
list.add("Kyle Huang");
list.add("Tommy Wang");
// Exporting the contents of ArrayList vertically at the first row and first column of the worksheet.
worksheet.getCells().importArrayList(list, 0, 0, true);
// Saving the Excel file
workbook.save("C:\\Files\\Output.xlsx");
// Initialize a Workbook object
Workbook workbook = new Workbook();
// Obtaining the reference of the worksheet
Worksheet worksheet = workbook.getWorksheets().get(0);
// Creating an array containing names as string values
String[] names = new String[] { "Laurence Chen", "Roman Korchagin", "Kyle Huang" };
// Exporting the array of names to first row and first column vertically
worksheet.getCells().importArray(names, 0, 0, true);
// Saving the Excel file
workbook.save("C:\\Files\\output.xlsx");
// Initialize a new Workbook
Workbook book = new Workbook();
// Obtaining the reference of the worksheet
Worksheet sheet = book.getWorksheets().get(0);
// Define an ArrayList of Persons
List<Person> list = new ArrayList<Person>();
list.add(new Person("Mike", 25, "Software Engineer"));
list.add(new Person("Steve", 30, "Doctor"));
list.add(new Person("Billy", 35, "Teacher"));
// We pick only Name and Age columns, not all, to export to the worksheet
sheet.getCells().importCustomObjects((Collection)list,
new String[] { "Name", "Age" }, // propertyNames
true, // isPropertyNameShown
0, // firstRow
0, // firstColumn
list.size(), // Number of objects to be exported
true, // insertRows
null, // dateFormatString
false); // convertStringToNumber
// Save the Excel file
book.save("C:\\Files\\Output.xlsx");
// Initialize LoadOptions with CSV LoadFormat.
LoadOptions loadOptions = new LoadOptions(LoadFormat.CSV);
// Open CSV file as a Workbook object
Workbook workbook = new Workbook("C:\\Files\\Sample.csv", loadOptions);
// Save the file as an Excel Documnt
workbook.save("C:\\Files\\Output.xlsx");
// Opening an existing Workbook.
Workbook workbook = new Workbook("C:\\Files\\SampleMergedTemplate.xlsx");
// Obtaining the reference of the worksheet
Worksheet sheet = workbook.getWorksheets().get(0);
// Instantiating an ArrayList object
List<Product> productList = new ArrayList<Product>();
// Creating a collection of Products
for (int i = 0; i < 3; i++)
{
Product product = new Product(i, "Product - " + i);
productList.add(product);
}
// Define Table import options
ImportTableOptions tableOptions = new ImportTableOptions();
// Set CheckMergedCells property to true
tableOptions.setCheckMergedCells(true);
tableOptions.setFieldNameShown(false);
// Export data to excel template (in second row, first column)
sheet.getCells().importCustomObjects((Collection)productList, 1, 0, tableOptions);
// Save the Excel file
workbook.save("C:\\Files\\Output.xlsx", SaveFormat.XLSX);
// Instantiating a Workbook object
Workbook workbook = new Workbook();
Worksheet worksheet = workbook.getWorksheets().get(0);
// Read JSON file
File file = new File("C:\\Files\\sample.json");
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
String jsonInput = "";
String tempString;
while ((tempString = bufferedReader.readLine()) != null) {
jsonInput = jsonInput + tempString;
}
bufferedReader.close();
// Set Styles
CellsFactory factory = new CellsFactory();
Style style = factory.createStyle();
style.setHorizontalAlignment(TextAlignmentType.CENTER);
style.getFont().setColor(Color.getCyan());
style.getFont().setBold(true);
// Set JsonLayoutOptions
JsonLayoutOptions options = new JsonLayoutOptions();
options.setTitleStyle(style);
options.setArrayAsTable(true);
// Export JSON Data
JsonUtility.importData(jsonInput, worksheet.getCells(), 0, 0, options);
// Save Excel file
workbook.save("C:\\Files\\Output.xlsx");
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