java 各种日期格式化工具

package org.hsweb.commons.time;

import org.joda.time.DateTime;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.regex.Pattern;

/**
* 日期格式化工具
*
* @author zhouhao
*/
public interface DateFormatter {

List<DateFormatter> supportFormatter = new ArrayList<>(Arrays.asList(
/*
*常见格式
* */
// yyyyMMdd
new DefaultDateFormatter(Pattern.compile("[0-9]{4}[0-9]{2}[0-9]{2}"), "yyyyMMdd")
// yyyy-MM-dd
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}-[0-9]{2}-[0-9]{2}"), "yyyy-MM-dd")
// yyyy/MM/dd
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}/[0-9]{2}/[0-9]{2}"), "yyyy/MM/dd")
//yyyy年MM月dd日
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}年[0-9]{2}月[0-9]{2}日"), "yyyy年MM月dd日")
//yyyy年M月d日
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}年[0-9]月[0-9]日"), "yyyy年M月d日")
//yyyy年MM月d日
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}年[0-9]{2}月[0-9]日"), "yyyy年MM月d日")
//yyyy年M月dd日
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}年[0-9]月[0-9]{2}日"), "yyyy年M月dd日")

// yyyy-M-d
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}-[0-9]-[0-9]"), "yyyy-M-d")
// yyyy-MM-d
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}-[0-9]{2}-[0-9]"), "yyyy-MM-d")
// yyyy-M-dd
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}-[0-9]-[0-9]{2}"), "yyyy-M-dd")

// yyyy/M/d
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}/[0-9]/[0-9]"), "yyyy/M/d")
// yyyy/MM/d
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}/[0-9]{2}/[0-9]"), "yyyy/MM/d")
// yyyy/M/dd
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}/[0-9]/[0-9]{2}"), "yyyy/M/dd")

// yyyy-MM-dd HH:mm:ss
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}"), "yyyy-MM-dd HH:mm:ss")

// yyyy/MM/dd HH:mm:ss
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}/[0-9]{2}/[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}"), "yyyy/MM/dd HH:mm:ss")
// yyyy-MM-dd HH:mm:ssZ
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}\\+[0-9]{4}"), "yyyy-MM-dd HH:mm:ssZ")
//yyyy-MM-dd'T'HH:mm:ss
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}"), "yyyy-MM-dd'T'HH:mm:ss")
//yyyy-MM-dd'T'HH:mm:ssZ
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}\\+[0-9]{4}"), "yyyy-MM-dd'T'HH:mm:ssZ")
//yyyy年MM月dd日HH时mm分ss秒
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}年[0-9]{2}月[0-9]{2}日[0-9]{2}时[0-9]{2}分[0-9]{2}秒"), "yyyy年MM月dd日HH时mm分ss秒")
//yyyy年MM月dd日 HH时mm分ss秒
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}年[0-9]{2}月[0-9]{2}日 [0-9]{2}时[0-9]{2}分[0-9]{2}秒"), "yyyy年MM月dd日 HH时mm分ss秒")
// HH:mm:ss
, new DefaultDateFormatter(Pattern.compile("[0-9]{2}:[0-9]{2}:[0-9]{2}"), "HH:mm:ss")
/*
* 奇奇怪怪的格式
* */
// yyyyMMdd HH:mm:dd
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}[0-9]{2}[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}"), "yyyyMMdd HH:mm:ss")
// yyyyMMddHHmmdd
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}[0-9]{2}[0-9]{2}[0-9]{2}[0-9]{2}[0-9]{2}"), "yyyyMMddHHmmdd")
// yyyyMMdd HHmmdd
, new DefaultDateFormatter(Pattern.compile("[0-9]{4}[0-9]{2}[0-9]{2} [0-9]{2}[0-9]{2}[0-9]{2}"), "yyyyMMdd HHmmdd")
//yyyy年 MM月 dd日 EEE HH:mm:ss 'CST'
, new SampleJDKDateFormatter(str -> str.contains("年") && str.contains("CST") && str.split("[ ]").length == 6, () -> new SimpleDateFormat("yyyy年 MM月 dd日 EEE HH:mm:ss 'CST'", Locale.CHINESE))
//yyyy年 MM月 dd日 EEE HH:mm:ss 'GMT'
, new SampleJDKDateFormatter(str -> str.contains("年") && str.contains("GMT") && str.split("[ ]").length == 6, () -> new SimpleDateFormat("yyyy年 MM月 dd日 EEE HH:mm:ss 'GMT'", Locale.CHINESE))
//EEE MMM ddHH:mm:ss 'CST' yyyy
, new SampleJDKDateFormatter(str -> str.contains("CST") && str.split("[ ]").length == 6, () -> new SimpleDateFormat("EEE MMM dd HH:mm:ss 'CST' yyyy", Locale.US))
//EEE MMM ddHH:mm:ss 'GMT' yyyy
, new SampleJDKDateFormatter(str -> str.contains("GMT") && str.split("[ ]").length == 6, () -> new SimpleDateFormat("EEE MMM dd HH:mm:ss 'GMT' yyyy", Locale.US))
//MMM d, yyyy K:m:s a
, new SampleJDKDateFormatter(str -> str.endsWith("AM") || str.endsWith("PM") && str.split("[ ]").length == 5, () -> new SimpleDateFormat("MMM d, yyyy K:m:s a", Locale.ENGLISH))
));

boolean support(String str);

Date format(String str);

String toString(Date date);

String getPattern();

static Date fromString(String dateString) {
DateFormatter formatter = getFormatter(dateString);
if (formatter != null)
return formatter.format(dateString);
return null;
}

static Date fromString(String dateString, String pattern) {
try {
return new SimpleDateFormat(pattern).parse(dateString);
} catch (ParseException e) {
e.printStackTrace();
return null;
}
}

static String toString(Date date, String format) {
if (null == date) return null;
for (DateFormatter formatter : supportFormatter) {
if (formatter.getPattern().equals(format))
return formatter.toString(date);
}
return new DateTime(date).toString(format);
}

static boolean isSupport(String dateString) {
return !(dateString == null || dateString.length() < 4) && supportFormatter.parallelStream().anyMatch(formatter -> formatter.support(dateString));
}

static DateFormatter getFormatter(String dateString) {
if (dateString == null || dateString.length() < 4) return null;
for (DateFormatter formatter : supportFormatter) {
if (formatter.support(dateString))
return formatter;
}
return null;
}
}