Embed Excel in JavaFx - excel

Question

Is there a library that allows for the display of an excel sheet/workbook inside a FX GUI? It does not need to be modifiable.
I am using apache POI for the reading and writing of documents.
Thanks in advance.

Answer 1

As an update on how I solved this. I used controlsFX's SpreadsheetView to display the excel sheet I read using the poi library. All that was required was to read the sheet and build up the data for the view. I added the code below.
/**
* This class allows for the displaying of excel files within a window by
* utilizing SpreadsheetView from controlsFX and the reading capabilities of the POI library.
*
* Only usable for .xlsx files
*
* #author TM
*
*/
public class ExcelView {
/**
* Path to Excel
*/
private String filePath;
private int sheetIndex;
private boolean editible;
private FileInputStream inStream;
private XSSFWorkbook poiWorkbook;
private XSSFSheet poiSheet;
private SpreadsheetView theView;
public ExcelView(String path, int sheetIndex ,boolean editable){
filePath =path;
this.editible =editable;
this.sheetIndex =sheetIndex;
}
public ExcelView(String path, int sheetIndex){
filePath =path;
this.editible =false;
this.sheetIndex = sheetIndex;
}
private void initializeView() throws Exception{
GridBase grid = excelToGrid();
theView = new SpreadsheetView(grid);
theView.setEditable(editible);
}
public SpreadsheetView getView() throws Exception{
initializeView();
return theView;
}
public void showInNewWindow(){
Parent root;
try {
initializeView();
root = theView;
Stage stage = new Stage();
stage.setTitle(new File(filePath).getName());
stage.setScene(new Scene(root, 450, 450));
stage.getIcons().addAll(ResourceLoader.getIcons("Excel.ico"));
stage.show();
}
catch (Exception e) {
e.printStackTrace();
}
}
/**
* Updates the values in the view. This may happen after the Excel file has been
* modified after the initial reading.
* #throws Exception
*/
public void updateView() throws Exception{
GridBase newgrid = excelToGrid();
theView.setGrid(newgrid);
}
/**
* Creates a {#link GridBase} object from the excel file located at the path
* #return
* #throws Exception - when opening the file
*/
private GridBase excelToGrid() throws Exception{
// Read the Excel document and collect the rows
openBook();
poiSheet = poiWorkbook.getSheetAt(sheetIndex);
int[] size = getSize();
GridBase grid = new GridBase(size[0], size[1]);
ObservableList<ObservableList<SpreadsheetCell>> rows = FXCollections.observableArrayList();
Row poiRow;
Cell cell;
String value;
FormulaEvaluator evaluator = poiWorkbook.getCreationHelper().createFormulaEvaluator();
for (int row = 0; row < grid.getRowCount(); ++row) {
final ObservableList<SpreadsheetCell> list = FXCollections.observableArrayList();
poiRow = poiSheet.getRow(row);
for (int column = 0; column < grid.getColumnCount(); ++column) {
cell = poiRow.getCell(column);
value = ExcelUtils.cellStringValue(evaluator,cell);
list.add(SpreadsheetCellType.STRING.createCell(row, column, 1, 1,value));
}
rows.add(list);
}
grid.setRows(rows);
closeBook();
return grid;
}
/**
* Calculates the number of rows and columns in the sheet by looping
* and reading all the things :)
* #return the size as int[{rows, cols}]
*/
private int[] getSize(){
int numRows = 0;
int numCols =0;
int nullRowCounter = 0;
int nullColCounter = 0;
int maxNullRows = 6;
int maxNullCols = 6;
Row row;
Cell cell;
int localColCounter;
while(true){
row= poiSheet.getRow(numRows);
numRows++;
// Check row...
if(row == null){
nullRowCounter++;
}
else{
nullRowCounter = 0;
// If row not null, check columns...
localColCounter = 0;
while(true){
cell = row.getCell(localColCounter);
localColCounter++;
if(cell==null){
nullColCounter++;
}else{
nullColCounter = 0;
}
if(nullColCounter == maxNullCols){
// reached max null cells
localColCounter -= maxNullCols;
if(localColCounter > numCols)
numCols = localColCounter;
break;
// go to next row...
}
}
}
if(nullRowCounter == maxNullRows){
// reached max null rows
numRows -= maxNullRows;
break;
}
}
return new int[]{numRows, numCols};
}
private void openBook() throws Exception{
try {
File myFile = new File(filePath);
inStream = new FileInputStream(myFile);
poiWorkbook = new XSSFWorkbook (inStream);
}catch (Exception e) {
e.printStackTrace();
throw e;
}
}
private void closeBook() throws Exception{
try {
poiWorkbook.close();
inStream.close();
}catch (Exception e) {
e.printStackTrace();
throw e;
}
}
}