在 Java 中生成当前日期戳
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Generate a current datestamp in Java
提问by Trastle
What is the best way to generate a current datestamp in Java?
在 Java 中生成当前日期戳的最佳方法是什么?
YYYY-MM-DD:hh-mm-ss
YYYY-MM-DD:hh-mm-ss
回答by jt.
Using the standard JDK, you will want to use java.text.SimpleDateFormat
使用标准 JDK,您将需要使用 java.text.SimpleDateFormat
Date myDate = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd:HH-mm-ss");
String myDateString = sdf.format(myDate);
However, if you have the option to use the Apache Commons Lang package, you can use org.apache.commons.lang.time.FastDateFormat
但是,如果您可以选择使用 Apache Commons Lang 包,则可以使用 org.apache.commons.lang.time.FastDateFormat
Date myDate = new Date();
FastDateFormat fdf = FastDateFormat.getInstance("yyyy-MM-dd:HH-mm-ss");
String myDateString = fdf.format(myDate);
FastDateFormat has the benefit of being thread safe, so you can use a single instance throughout your application. It is strictly for formatting dates and does not support parsing like SimpleDateFormat does in the following example:
FastDateFormat 具有线程安全的优点,因此您可以在整个应用程序中使用单个实例。它严格用于格式化日期,并且不支持像 SimpleDateFormat 在以下示例中所做的解析:
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd:HH-mm-ss");
Date yourDate = sdf.parse("2008-09-18:22-03-15");
回答by John Millikin
Date d = new Date();
String formatted = new SimpleDateFormat ("yyyy-MM-dd:HH-mm-ss").format (d);
System.out.println (formatted);
回答by sblundy
There's also
还有
long timestamp = System.currentTimeMillis()
which is what new Date()(@John Millikin) uses internally. Once you have that, you can format it however you like.
这是new Date()(@ John Millikin)在内部使用的。一旦你有了它,你就可以随意格式化它。
回答by Walter Rumsby
final DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd:hh-mm-ss");
formatter.format(new Date());
The JavaDoc for SimpleDateFormatprovides information on date and time pattern strings.
SimpleDateFormat的JavaDoc提供有关日期和时间模式字符串的信息。
回答by Michael Neale
SimpleDateFormatter is what you want.
SimpleDateFormatter 就是你想要的。

