java生成excel文档

WritableWorkbook workbook = null;
        try {
            workbook = Workbook.createWorkbook(new File("F:\\test.xls"));
            //创建新的一页
            WritableSheet sheet = workbook.createSheet("First Sheet", 0);
            //创建要显示的具体内容
            Label formate = new Label(0,0,"数据格式");
            sheet.addCell(formate);
            Label floats = new Label(1,0,"浮点型");
            sheet.addCell(floats);
            Label integers = new Label(2,0,"整型");
            sheet.addCell(integers);
            Label booleans = new Label(3,0,"布尔型");
            sheet.addCell(booleans);
            Label dates = new Label(4,0,"日期格式");
            sheet.addCell(dates);
            
            Label example = new Label(0,1,"数据示例");
            sheet.addCell(example);
            //浮点数据
            Number number = new Number(1,1,3.1415926535);
            sheet.addCell(number);
            //整形数据
            Number ints = new Number(2,1,15042699);
            sheet.addCell(ints);
            Boolean bools = new Boolean(3,1,true);
            sheet.addCell(bools);
            //日期型数据
            Calendar c = Calendar.getInstance();
            Date date = c.getTime();
            WritableCellFormat cf1 = new WritableCellFormat(DateFormats.FORMAT1);
            DateTime dt = new DateTime(4,1,date,cf1);
            sheet.addCell(dt);
            //把创建的内容写入到输出流中，并关闭输出流
           
        } catch (RowsExceededException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (WriteException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        workbook.write();
        System.out.println("写入成功");
        workbook.close(); */

public String  createOrderFile() throws RowsExceededException, WriteException {
        
        // 生成随机单号
        randomePlatformID= getRandomNumber(11);
        randomePlatformID = "PM" + randomePlatformID;

          File file = new File(""); //获取项目的绝对地址
         String abspath = file.getAbsolutePath();

        createUrl= abspath + "\\OfflineOrders.xls";
        Log.logInfo("地址是:" + createUrl);
        WritableWorkbook workbook = null ;
        WritableSheet sheet = null;
        try {
            workbook = Workbook.createWorkbook(new File(createUrl));
            sheet = workbook.createSheet("First Sheet", 0);
        } catch (IOException e) {
            e.printStackTrace();
            Log.logInfo("创建文件失败");
        }
        String[] cellText = { "平台", "所属人", "对方店铺账号", "付款ID", "平台单号", "订单运费", "发货仓库", "发货渠道", "收件人国家简码"
                , "公司名称", "收件人姓名","州", "城市", "地址1", "地址2", "邮编", "电话", "Email", "SKU1", "数量1", "单价", "币种" };
        String[] contentText = { "JOOM", "JM3901556", "", "", "PM789", "", "SZ", "DEDHL", "DE", "", "Daniela Weihrauch"
                ,"Berlin", "Berlin", "Stellingdamm 9", "", "55555", "+49 3068838320", "", "109036701", "3", "17","USD" };
        // 生成列头
        for (int i = 0; i < cellText.length; i++) {
            Label columnHeader = new Label(i, 0, cellText[i]);        
            try {
                sheet.addCell(columnHeader);
            } catch (RowsExceededException e) {
                e.printStackTrace();
            } catch (WriteException e) {
                e.printStackTrace();
            }
        }
                // 填入正文内容
                for (int j = 0; j < contentText.length; j++) {
                    Label columnBody;
                    if (j == 4) {// 平台订单号单独处理
                        Log.logInfo("生成随机10位数平台订单编号为：" + randomePlatformID);
                        columnBody = new Label(j, 1, randomePlatformID);
                    } else {
                        columnBody = new Label(j, 1, contentText[j]);
                    }                    
                    sheet.addCell(columnBody);
                }
                try {
                    workbook.write();
                    Log.logInfo("写入成功");
                    try {
                        workbook.close();
                    } catch (WriteException e) {
                        e.printStackTrace();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
        
        return randomePlatformID;
        
    }