读取excel文件字节数组

Question

byte[] test = getByteArry(excelfikepath)

I have one method where it returns the bytearray of the excel .xlsx file. To read this file i need to write these byte array using FileOutputStream on one server and from there i am calling another method which will read and process that excel from the server.

There is some limitation because of which i cant read excel file directly i have to put it onto another server and process.

Just wanted to know is there any way by which i can make use of this byte array and read excel file IN MEMORY instead of writing it on server.

Answer 1

This will help to get byte array out of an excel file.

public static byte[] getFileByteArr(String fileName) throws InvalidFormatException, IOException {

        try (OPCPackage opcPackage = OPCPackage.open(new File(fileName))) {
            try (XSSFWorkbook workbook = (XSSFWorkbook) WorkbookFactory.create(opcPackage)) {
                try (ByteArrayOutputStream bos = new ByteArrayOutputStream()) {
                    workbook.write(bos);
                    return bos.toByteArray();
                }
            }
        }
    }