使用Apache POI读取ms excel时未保留前导零

Question

I am trying to read .xlsx file in java (using Apache POI API) whose cell contain values having leading zeros. eg 0590040100000124

But in output i get something like this

6247241.0 <-> 5.90040100000124E14 <-> 0.0 <-> 5.90020100000125E14 <-> Here is my code

public static void main(String[] args) throws FileNotFoundException, IOException  {
    // TODO Auto-generated method stub
    try{
    Workbook workbook = new XSSFWorkbook(new FileInputStream("C://dedup//dedup.xlsx"));
    String sheetName= workbook.getSheetName(0);
    System.out.println("Sheet Name:"+sheetName);
    double cellValues[] = new double[1000];

     for (int i = 0; i < workbook.getNumberOfSheets(); i++) {
            Sheet sheet = workbook.getSheetAt(i);


            int cellIndex=0;

            for (Row row : sheet) {
                for (Cell cell : row) {
                        //if(cell.toString()!=null){
                         cell.setCellType(Cell.CELL_TYPE_NUMERIC);
                        cellValues[cellIndex]=cell.getNumericCellValue();
                        cellIndex++;
                        //}
                    }
            }
            for(int k=0;k<cellValues.length;k++)
                System.out.print(cellValues[k]+" <-> "+"\t");
        }
    }catch(Exception e){
        System.out.println("JKB Exception Message:"+e.getMessage());
    }

Answer 1

Your problem is that you're fetching the value as a double (Numbers in Excel are,except for a few edge cases, stored as floating point numbers). Floating point numbers printed from Java have no leading zeros, use scientific format etc

Assuming what you really wanted was "give me a string that looks like what Excel shows for this cell", then you don't want to be printing the raw double value. Instead, you need to use the DataFormatter class , which provides methods which read the Excel format rules applied to a cell, then re-creates (as best it can) those in Java

Your code should be:

DataFormatter fmt = new DataFormatter();

String numberAsInExcel = fmt.formatCellValue(cell);

That will format the number based on the formatting rules applied in Excel, so should return it looking as you expect, with leading zero, non-scientific format etc