Java excel的導入導出

將數據寫入excel

public void WriteExcel() {
        HSSFWorkbook wb = new HSSFWorkbook();
        Sheet sheet = wb.createSheet("jack");

        sheet.setDefaultColumnWidth(15);
        sheet.setDefaultRowHeight((short) 300);

        for (int i = 0; i < 10; i++) {
            Row row = wb.getSheet("jack").createRow(i);
            for (int j = 0; j < 10; j++) {
                row.createCell(j).setCellValue(j*i);
            }
        }
        FileOutputStream out = null;
        try {
            out = new FileOutputStream("f:\\text.xls");
            wb.write(out);
        } catch (IOException e) {
            System.out.println(e.toString());
        } finally {
            try {
                out.close();
            } catch (IOException e) {
                System.out.println(e.toString());
            }
        }
    }

從excel讀取數據

    public void ReadExcel(String fileName) {
        boolean isXlsx = false; // 判斷是否是xlsx格式
        if (fileName.endsWith("xlsx"))
            isXlsx = true;
        try {
            InputStream input = new FileInputStream(fileName); // 建立輸入流
            Workbook wb = null;
            if (isXlsx) {
                wb = new XSSFWorkbook(input);
            } else {
                wb = new HSSFWorkbook(input);
            }

            Sheet sheet = wb.getSheetAt(0); // 獲得第一個表單
            for (int rowNum = 7; rowNum <= sheet.getLastRowNum(); rowNum++) {
                Row hssfRow = sheet.getRow(rowNum);
                System.out.println(hssfRow.getCell(2));
                System.out.println(hssfRow.getCell(1));
                break;
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }