复古方法toGMTString归来

最新推荐文章于 2021-09-03 21:06:03 发布

原创最新推荐文章于 2021-09-03 21:06:03 发布 · 4.7k 阅读

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文章标签：

#date #javascript #java #function #string

本文提供了解决JavaScript和Java中日期对象转换为UTC格式字符串的方法。JavaScript部分通过自定义原型方法实现，确保了日期格式的正确输出；Java部分则利用SimpleDateFormat结合特定时区完成格式化。

Java中Date的toGMTString已经不推荐使用

JavaScript中Date的toGMTString输出的却是UTC格式的

想用不能用，郁闷

找到些快速的解决办法

以下以是代码

JavaScript版

/*normalize Date.prototype.toUTCString*/
(function(){
	if(new Date(Date.UTC(2000,0,1)).toUTCString()!=="Sat, 01 Jan 2000 00:00:00 GMT"){
		var dayAbbrs=["Sun","Mon","Tue","Wed","Thu","Fri","Fri"];
		var monthAbbrs=["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];
		var f=function(n){return n<10?"0"+n:""+n;};
		var DateToUTCString=function() {
			return isFinite(this.valueOf())?
				dayAbbrs[this.getUTCDay()]+", "+
				f(this.getUTCDate())+' '+
				monthAbbrs[this.getUTCMonth()]+' '+
				this.getUTCFullYear()+' '+
				f(this.getUTCHours())+':'+
				f(this.getUTCMinutes())+':'+
				f(this.getUTCSeconds())+' GMT':
				null;
		};
		Date.prototype.toUTCString0=Date.prototype.toUTCString;
		Date.prototype.toGMTString=Date.prototype.toUTCString=DateToUTCString;
	}
})();

Java版

package com.jbird.util;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class DateUtils {
	public static void main(String[] args) {
		System.out.println(DateUtils.toGMTString(new Date());
	}
	public static String toGMTString(Date date) {
		SimpleDateFormat df = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss z", Locale.UK);
		df.setTimeZone(new java.util.SimpleTimeZone(0, "GMT"));
		return df.format(date);
	}
}