在java中将未知日期格式的字符串表示形式转换为Date [英] converting string representation of unknown date-format to Date in java

问题描述

我有一个代表日期的字符串。 我不知道字符串的日期格式。但仅作为示例，可能是

• 2015-10-14T16：41：42.000Z


• 2015-10-14T19：01：53.100 + 01：00


• 2015-10-14 05:20:29

或网站可能用于描述元标记日期的任何有效格式（因此格式将为官方，而不是异想天开，但是一组可能性并不小）。

我可以用joda-time来解决这个问题吗？

更新

>

我想我找到一个等同于我正在寻找的Javascript

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects /日期

但是我需要一个 Java 的答案。

解决方案

这不是一个真正的java解决方案，但是如果你发现了一个Javascript，那么你可以使用java中的Javascript解决方案，使用 ScriptEngine 。

只是一点点肮脏...：）

这里是一个示例代码：

 code> public static void main（String [] args）throws ScriptException，ParseException {
脚本EngineManager manager = new ScriptEngineManager（）; 
 ScriptEngine engine = manager.getEngineByName（js）; 
 String [] dateStrings = new String [] {
2015-10-14T16：41：42.000Z，
2015-10-14T19：01：53.100 + 01：00 ，
2015-10-14 05:20:29}; 
 
 SimpleDateFormat sdf = new SimpleDateFormat（yyyy-MM-dd'THH：mm：ss.SSSXXX）; 
 for（String d：dateStrings）{
 String script =new Date（'+ d +'）; 
对象eval = engine.eval（script）; 
 Date parsed = sdf.parse（eval.toString（）。replace（[Date，）.replace（]，））; 
 System.out.println（eval + - >+解析）; 
 
} 
 
} 
  

打印出：

  [Date 2015-10-14T16：41：42.000Z]  - > Wed Oct 14 18:41:42 CEST 2015 
 [Date 2015-10-14T18：01：53.100Z]  - > Wed Oct 14 20:01:53 CEST 2015 
 [Date 2015-10-14T03：20：29.000Z]  - > Wed Oct 14 05:20:29 CEST 2015 
  

eval.toString（）部分可以明显改善。作为区域设置...

I have a string that represents a date. I do not know the date format of the string. But for example only, it may be any of

• 2015-10-14T16:41:42.000Z
• 2015-10-14T19:01:53.100+01:00
• 2015-10-14 05:20:29

or any valid format that a website may use to describe date in a meta tag (so the format will be official, as opposed to whimsical, but the set of possibilities is not small).

Can I use joda-time to solve this issue? How about java.util.Date or anything else?

update

I think I find a Javascript equivalent of what I am looking for

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date

But I need an answer for Java.

解决方案

well this is not a real "java" solution, but if you have found a Javascript one, than you can use the Javascript solution in java using the ScriptEngine.

just a little quick and dirty... :)

here is a sample code:

public static void main(String[] args) throws ScriptException, ParseException {
    ScriptEngineManager manager = new ScriptEngineManager();
    ScriptEngine engine = manager.getEngineByName("js");
    String[] dateStrings = new String[] {
            "2015-10-14T16:41:42.000Z",
            "2015-10-14T19:01:53.100+01:00",
            "2015-10-14 05:20:29" };

    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSXXX");
    for (String d : dateStrings) {
        String script = "new Date('" + d + "')";
        Object eval = engine.eval(script);
        Date parsed = sdf.parse(eval.toString().replace("[Date ", "").replace("]", ""));
        System.out.println(eval + " -> " + parsed);

    }

}

that prints out:

[Date 2015-10-14T16:41:42.000Z] -> Wed Oct 14 18:41:42 CEST 2015
[Date 2015-10-14T18:01:53.100Z] -> Wed Oct 14 20:01:53 CEST 2015
[Date 2015-10-14T03:20:29.000Z] -> Wed Oct 14 05:20:29 CEST 2015

The eval.toString() part can be improved obviously. as the locale settings...

这篇关于在java中将未知日期格式的字符串表示形式转换为Date的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！