[英]How to check if String contains a only Date format in Java?
This is the sample line of code: 这是代码示例行:
Date[] dates = {"12/09/2014","2014/09/09"....};
There are several ways to do this. 有几种方法可以做到这一点。 For example, you can test several known date formats by setting them like this, then using a for-loop to check your date string. 例如,您可以通过这样设置几种已知的日期格式来测试它们,然后使用for循环检查日期字符串。
// List of all date formats that you want to parse
private static List<simpledateformat>;
dateFormats = new ArrayList<simpledateformat>() {{
add(new SimpleDateFormat("M/dd/yyyy"));
add(new SimpleDateFormat("dd.M.yyyy"));
add(new SimpleDateFormat("M/dd/yyyy hh:mm:ss a"));
add(new SimpleDateFormat("dd.M.yyyy hh:mm:ss a"));
add(new SimpleDateFormat("dd.MMM.yyyy"));
add(new SimpleDateFormat("dd-MMM-yyyy"));
}
Here's a full implementation from another fellow: http://viralpatel.net/blogs/check-string-is-valid-date-java/ 这是另一个人的完整实现: http : //viralpatel.net/blogs/check-string-is-valid-date-java/
You can also use regular expressions. 您也可以使用正则表达式。 Here is some sample code to do what you' re asking: http://www.mkyong.com/regular-expressions/how-to-validate-date-with-regular-expression/ 以下是一些示例代码,可满足您的要求: http : //www.mkyong.com/regular-expressions/how-to-validate-date-with-regular-expression/
Date d=new Date(); 日期d = new Date();
System.out.println("DATE :"+ new SimpleDateFormat("dd.M.yyyy").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("M/dd/yyyy").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("M/dd/yyyy hh:mm:ss a").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("dd.M.yyyy hh:mm:ss a").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("M/dd/yyyy").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("dd.MMM.yyyy").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("dd-MMM-yyyy").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("EEEE, MMMM d, yyyy HH:mm z").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("MMMM d, yyyy HH:mm z").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("EEE, MMM d, yyyy HH:mm z").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("MMM d, yyyy HH:mm z").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("EEE, MM/dd/yyyy HH:mm:ss z").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("MM/dd/yyyy HH:mm:ss z").format(d));
System.out.println("DATE :"+ new SimpleDateFormat("EEE, M/d/yy hh:mm").format(d));
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