如何生成SWT表格動態下拉Excel表格？

我想生成SWT列的動態下拉列以及Excel表。如何生成SWT表格動態下拉Excel表格？

SWT同列表列以及excell列順序相同。

2017-05-12 Chetan Bhagat

這是它的代碼。我已經將SWT表格轉換成帶有驗證和受保護表格的Excel表格。

SWTTableMain.java:-主類。

public class SWTTableMain extends Shell { 
private Table table; 
public static final String[] ITEMS = { "a1", "a2", "a3", "a4" }; 

public static void main(String args[]) { 
    try { 
     Display display = Display.getDefault(); 
     SWTTableMain shell = new SWTTableMain(display); 
     // tableShell = display.getActiveShell(); 
     shell.open(); 
     shell.layout(); 
     while (!shell.isDisposed()) { 
      if (!display.readAndDispatch()) { 
       display.sleep(); 
      } 
     } 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
} 

public SWTTableMain(final Display display) { 
    super(display, SWT.SHELL_TRIM); 
    setLayout(new GridLayout(1, false)); 

    Button btnOpenexcel = new Button(this, SWT.NONE); 
    btnOpenexcel.setText("OpenExcel"); 

    table = new Table(this, SWT.BORDER | SWT.FULL_SELECTION); 
    table.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1)); 
    table.setHeaderVisible(true); 
    table.setLinesVisible(true); 

    TableColumn tblclmnSrNo = new TableColumn(table, SWT.NONE); 
    tblclmnSrNo.setWidth(100); 
    tblclmnSrNo.setText("SR No:"); 
    tblclmnSrNo.setMoveable(true); 
    TableColumn tblclmnName = new TableColumn(table, SWT.NONE); 
    tblclmnName.setWidth(138); 
    tblclmnName.setText("Name"); 
    tblclmnName.setMoveable(true); 

    TableColumn tblclmnNewColumn = new TableColumn(table, SWT.NONE); 
    tblclmnNewColumn.setWidth(119); 
    tblclmnNewColumn.setText("Address"); 
    tblclmnNewColumn.setMoveable(true); 
    TableColumn tblclmnEmail = new TableColumn(table, SWT.NONE); 
    tblclmnEmail.setWidth(122); 
    tblclmnEmail.setText("Email"); 
    tblclmnEmail.setMoveable(true); 

    TableColumn tblclmnDropdown = new TableColumn(table, SWT.NONE); 
    tblclmnDropdown.setWidth(100); 
    tblclmnDropdown.setText("DropDown"); 
    tblclmnDropdown.setMoveable(true); 

    // fill table data 
    TableItem item1 = new TableItem(table, SWT.NONE); 
    item1.setText(new String[] { "1", "Test1", "Ahemdabad", "[email protected]" }); 
    TableEditor editor = new TableEditor(table); 
    CCombo combo = new CCombo(table, SWT.NONE); 
    combo.setText("Select"); 
    combo.setItems(ITEMS); 
    editor.grabHorizontal = true; 
    editor.setEditor(combo, item1, 4); 

    // Write data to xls 
    btnOpenexcel.addSelectionListener(new SelectionListener() { 
     @Override 
     public void widgetSelected(SelectionEvent e) { 
      // TODO Auto-generated method stub 
      ExcelSheet.generateExcelSheet(table, ITEMS); 
      ExcelDialog excelDialog = new ExcelDialog(display.getActiveShell(), SWT.NONE); 
      excelDialog.open(); 
     } 

     @Override 
     public void widgetDefaultSelected(SelectionEvent e) { 
      // TODO Auto-generated method stub 
     } 
    }); 
    createContents(); 
} 


protected void createContents() { 
    setText("SWT Application"); 
    setSize(597, 300); 
    }

}

ExcelSheet.java

public class ExcelSheet { 
private static String[] DropdownValue = null; 
static DataValidation dataValidation = null; 
static DataValidationConstraint constraint = null; 
static DataValidationHelper validationHelper = null; 

public static void generateExcelSheet(final Table table, String[] ITEMS) { 

    try { 

     // For file read 
     InputStream ExcelFileToRead = new FileInputStream("D:\\XLTest\\ExportedData.xlsx"); 
     XSSFWorkbook wb = new XSSFWorkbook(ExcelFileToRead); 
     // add a worksheet 

     XSSFSheet sheet = wb.getSheetAt(0);  
     cleanSheet(sheet); 
     wb.lockStructure();// locak wrokbbok 
     validationHelper = new XSSFDataValidationHelper(sheet); 
     // shade the background of the header row 
     XSSFCellStyle headerStyle = wb.createCellStyle(); 
     headerStyle.setFillForegroundColor(IndexedColors.LEMON_CHIFFON.getIndex()); 
     // add header row 
     TableColumn[] columns = table.getColumns(); 
     // add data rows 
     TableItem[] items = table.getItems(); 
     int[] Colorder = table.getColumnOrder(); 
     int rowIndex = 0; 
     int cellIndex = 0; 
     int DropDownColOrder = 0; 
     XSSFRow header = sheet.createRow((short) rowIndex++); 


     for(int i= 0;i< Colorder.length; i++) 
     { 
      XSSFCell cell = header.createCell(cellIndex++); 
      cell.setCellValue(columns[Colorder[i]].getText()); 
      System.out.println("Heder Value:-"+columns[Colorder[i]].getText()); 

      if(columns[Colorder[i]].getText().equals("DropDown")){ 
       System.out.println("i:-"+i); 
       DropDownColOrder = i; 


      } 
      cell.setCellStyle(headerStyle); 
     } 


     DropdownValue = ITEMS;  
     constraint = validationHelper.createExplicitListConstraint(DropdownValue); 
     int lastRow = table.getItemCount(); 
     CellRangeAddressList addressList = new CellRangeAddressList(1,lastRow, DropDownColOrder, DropDownColOrder); 
     dataValidation = validationHelper.createValidation(constraint,addressList); 
     dataValidation.setSuppressDropDownArrow(true); 
     sheet.addValidationData(dataValidation); 

     for (TableItem item : items) { 
      // create a new row 
      XSSFRow row = sheet.createRow((short) rowIndex++);    
      if(row != null) 
      { 
       cellIndex = 0; 
       for (int i = 0; i < columns.length; i++) 
       { 
        // create a new cell 
        XSSFCell cell = row.createCell(cellIndex); 
        // set the horizontal alignment (default to RIGHT)      
        XSSFCellStyle cellStyle = wb.createCellStyle(); 
        cellStyle.setLocked(true);     
        cell.setCellStyle(cellStyle);  
        cell.setCellValue(item.getText(Colorder[cellIndex])); 
        cellIndex++; 
       } 
      } 

     }  


     // autofit the columns 
     for (int i = 0; i < columns.length; i++) { 
      sheet.autoSizeColumn((short) i); 
     } 
     String filename = "D:\\XLTest\\ExportedData.xlsx"; 
     FileOutputStream fos = new FileOutputStream(filename); 
     wb.write(fos); 
     fos.close(); 
     MessageDialog.openInformation(new Shell(),"Save Workbook Successful","Workbook saved to the file:\n\n" + filename); 
    } catch (IOException ioe) { 
     ioe.printStackTrace(); 
     String msg = ioe.getMessage(); 
     MessageDialog.openError(new Shell(), "Save Workbook Failed","Could not save workbook to the file:\n\n" + msg); 
    } 

} 

public static boolean cleanSheet(XSSFSheet sheet) { 
    int numberOfRows = sheet.getPhysicalNumberOfRows(); 

    if(numberOfRows > 0) { 
     sheet.getCTWorksheet().unsetDataValidations(); 
     for (int i = sheet.getFirstRowNum(); i <= sheet.getLastRowNum(); i++) { 
      if(sheet.getRow(i) != null) { 
       sheet.removeRow(sheet.getRow(i)); 
      } else { 
       System.out.println("Info: clean sheet='" + sheet.getSheetName() + "' ... skip line: " + i); 
      } 
     }  
     return true; 
    } else { 
     System.out.println("Info: clean sheet='" + sheet.getSheetName() + "' ... is empty"); 
    } 
    return false;  
}

}

ExcelDialog.java

public class ExcelDialog extends Dialog { 

protected Object result,tabledata; 
protected Shell shell; 
private OleFrame oleframe = null; 
private OleClientSite oleClientSite = null; 

private String fileLocation = "D:\\XLTest\\ExportedData.xlsx"; 


public ExcelDialog(Shell parent, int style) { 
    super(parent, style); 
    setText("SWT Dialog"); 
} 


public Object open() { 
    createContents(); 
    shell.open(); 
    shell.setMaximized(true); 
    shell.layout(); 
    Display display = getParent().getDisplay(); 
    while (!shell.isDisposed()) { 
     if (!display.readAndDispatch()) { 
      display.sleep(); 
     } 
    } 
    return result; 
} 

private void openCurrentDataSheet() { 
    // TODO Auto-generated method stub 
    System.out.println("called"); 
    oleframe = new OleFrame(shell, SWT.NONE); 
    oleframe.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1)); 
    oleClientSite = new OleClientSite(oleframe, SWT.NONE, "Excel.Sheet",new File(fileLocation)); 
    oleClientSite.doVerb(OLE.OLEIVERB_INPLACEACTIVATE); 


} 


private void createContents() { 
    shell = new Shell(getParent(), SWT.SHELL_TRIM | SWT.BORDER); 
    shell.setSize(450, 300); 
    shell.setText(getText()); 
    shell.setLayout(new GridLayout(1, false));    
     openCurrentDataSheet();  
     Button btnSave = new Button(shell, SWT.NONE); 
     btnSave.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 1, 1)); 
     btnSave.setText("Save"); 

     btnSave.addSelectionListener(new SelectionListener() {    
      @Override 
      public void widgetSelected(SelectionEvent e) { 
       System.out.println("click event called"); 

       // File is aleredy located or not 
       File xlsFile = new File(fileLocation); 
       boolean fileAvilable = xlsFile.exists(); 
       System.out.println("fileAvilable:--"+fileAvilable); 

      if(fileAvilable == true) 
      { 
       boolean filedeleted = xlsFile.delete(); 
       System.out.println("filedeleted:--"+filedeleted); 
       File finalFile = new File(fileLocation); 
       oleClientSite.save(finalFile, true); 
       oleClientSite.deactivateInPlaceClient(); 
       shell.dispose(); 
       System.out.println("file new Saved"); 
      } 
      } 

     @Override 
      public void widgetDefaultSelected(SelectionEvent e) { 
       // TODO Auto-generated method stub 

      } 
     });   
}

}

來源

2017-05-12 09:59:23

如何生成SWT表格動態下拉Excel表格？

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