java string 日期格式轉換

場景一:orm

String time = "2017-01-03 13:43:12";
SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
SimpleDateFormat sd = new SimpleDateFormat("yyyyMMddHHmmss");
try {
    String time1 = sd.format(sf.parse(time));
    System.out.println(time1);
} catch (ParseException e) {
    e.printStackTrace();
}

輸出獲得:20170103134312io

場景二:form

String time = "20170909090909";
SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
SimpleDateFormat sd = new SimpleDateFormat("yyyyMMddHHmmss");
try {
    String time1 = sf.format(sd.parse(time));
    System.out.println(time1);
} catch (ParseException e) {
    e.printStackTrace();
}

輸出獲得:2017-09-09 09:09:09im

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