Java excel的导入导出

偏执的太偏执、 2022-08-10 08:50 254阅读 0赞

**将数据写入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());
                }
            }
        }

**从excel读取数据**

public void ReadExcel(String fileName) {
            boolean isXlsx = false; // 判断是否是xlsx格式
            if (fileName.endsWith("xlsx"))
                isXlsx = true;
            try {
                InputStream input = new FileInputStream(fileName); // 建立输入流
                Workbook wb = null;
                if (isXlsx) {
                    wb = new XSSFWorkbook(input);
                } else {
                    wb = new HSSFWorkbook(input);
                }
    
                Sheet sheet = wb.getSheetAt(0); // 获得第一个表单
                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();
            }
        }