Java:将字符串转换为TimeStamp [英] Java: Convert String to TimeStamp

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问题描述

当我尝试将String转换为TimeStamp时,我有一个问题。我有一个数组,日期格式为 yyyy-MM-dd ,我想以 yyyy-MM-dd的格式更改HH:mm:ss.SSS 。所以,我使用这个代码:

  final String OLD_FORMAT =yyyy-MM-dd; 
final String NEW_FORMAT =yyyy-MM-dd HH:mm:ss.SSS;
String oldDateString = createdArray [k];
String newDateString;

DateFormat formatter = new SimpleDateFormat(OLD_FORMAT);
日期d = formatter.parse(oldDateString);
((SimpleDateFormat)formatter).applyPattern(NEW_FORMAT);
newDateString = formatter.format(d);
System.out.println(newDateString);

时间戳ts = Timestamp.valueOf(newDateString);
System.out.println(ts);

,我得到以下结果。


2009-10-20 00:00:00.000



2009-10-20 00:00:00.0


但是当我尝试简单地做

  String text = 2011-10-02 18:48:05.123; 
ts = Timestamp.valueOf(text);
System.out.println(ts);

我得到正确的结果:


2011-10-02 18:48:05.123


你知道我可能做错了吗?
感谢您的帮助。

解决方案

请按照以下步骤获取正确的结果:

  try {
SimpleDateFormat dateFormat = new SimpleDateFormat(yyyy-MM-dd hh:mm:ss.SSS);
日期parsedDate = dateFormat.parse(yourString);
Timestamp timestamp = new java.sql.Timestamp(parsedDate.getTime());
} catch(Exception e){//这个泛型,但你可以控制另一种类型的异常
看起来的排除的起源
}
pre>

请注意, .parse(String)可能会抛出一个 ParseException


I have an issue while I try to convert a String to a TimeStamp. I have an array that has the date in the format of yyyy-MM-dd and I want to change in the format of yyyy-MM-dd HH:mm:ss.SSS. So, I use this code:

final String OLD_FORMAT = "yyyy-MM-dd";
final String NEW_FORMAT = "yyyy-MM-dd HH:mm:ss.SSS";
String oldDateString = createdArray[k];
String newDateString;

DateFormat formatter = new SimpleDateFormat(OLD_FORMAT);
Date d = formatter.parse(oldDateString);
((SimpleDateFormat) formatter).applyPattern(NEW_FORMAT);
newDateString = formatter.format(d);
System.out.println(newDateString);

Timestamp ts = Timestamp.valueOf(newDateString);
System.out.println(ts);

and I get the following result.

2009-10-20 00:00:00.000

2009-10-20 00:00:00.0

but when I try to simply do

String text = "2011-10-02 18:48:05.123";
ts = Timestamp.valueOf(text);
System.out.println(ts);

I get the right result:

2011-10-02 18:48:05.123

Do u know what I might be doing wrong? Thanks for the help.

解决方案

Follow these steps for a correct result:

try{
    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.SSS");
    Date parsedDate = dateFormat.parse(yourString);
    Timestamp timestamp = new java.sql.Timestamp(parsedDate.getTime());
}catch(Exception e){//this generic but you can control another types of exception
 look the origin of excption 
}

Please note that .parse(String) might throw a ParseException.

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