Java生成"年月日"+流水號

    private final static String FORMAT_CODE = "0000";
    private final static String PRE_CODE = "BM";
    @Test
    public void FormatCode() {
        int count = 1; // 流水號
        DecimalFormat dft = new DecimalFormat(FORMAT_CODE);
        String code = dft.format(count); // 格式化為四位流水號 code: 0001
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
        String date = sdf.format(new Date()); // 格式化日期 date: 20200724
        String codeEnd = PRE_CODE + date + code;
        System.out.println(codeEnd);
    }

輸出結果為 : BM202007240001