日期格式常量整理（JAVA）

https://blog.csdn.net/qq_38288606

因在项目中频繁使用日期格式，这里稍做整理，方便自己也方便有需要的朋友！！！

package com.michael.tool.date;

import org.apache.commons.lang3.time.FastDateFormat;

import java.util.Locale;
import java.util.TimeZone;

/**
 * 日期格式
 * <p>
 * Created by michael on 2018/6/11.
 */
public class DatePattern {

    public static final String NORM_DATE_PATTERN = "yyyy-MM-dd";
    public static final FastDateFormat NORM_DATE_FORMAT = FastDateFormat.getInstance(NORM_DATE_PATTERN);

    public static final String PURE_DATE_PATTERN = "yyyyMMdd";
    public static final FastDateFormat PURE_DATE_FORMAT = FastDateFormat.getInstance(PURE_DATE_PATTERN);

    public static final String NORM_DATETIME_PATTERN = "yyyy-MM-dd HH:mm:ss";
    public static final FastDateFormat NORM_DATETIME_FORMAT = FastDateFormat.getInstance(NORM_DATETIME_PATTERN);
    public static final String NORM_DATETIME_MINUTE_PATTERN = "yyyy-MM-dd HH:mm";
    public static final FastDateFormat NORM_DATETIME_MINUTE_FORMAT = FastDateFormat.getInstance(NORM_DATETIME_MINUTE_PATTERN);

    public static final String PURE_DATETIME_PATTERN = "yyyyMMddHHmmss";
    public static final FastDateFormat PURE_DATETIME_FORMAT = FastDateFormat.getInstance(PURE_DATETIME_PATTERN);
    public static final String PURE_DATETIME_MS_PATTERN = "yyyyMMddHHmmssSSS";
    public static final FastDateFormat PURE_DATETIME_MS_FORMAT = FastDateFormat.getInstance(PURE_DATETIME_MS_PATTERN);

    public static final String EN_DATE_PATTERN = "yyyy/MM/dd";
    public static final FastDateFormat EN_DATE_FORMAT = FastDateFormat.getInstance(EN_DATE_PATTERN);
    public static final String EN_DATE_MONTH_PATTERN = "yyyy/MM";
    public static final FastDateFormat EN_DATE_MONTH_FORMAT = FastDateFormat.getInstance(EN_DATE_MONTH_PATTERN);
    public static final String EN_DATETIME_MINUTE_PATTERN = "yyyy/MM/dd HH:mm";
    public static final FastDateFormat EN_DATETIME_MINUTE_FORMAT = FastDateFormat.getInstance(EN_DATETIME_MINUTE_PATTERN);
    public static final String EN_DATETIME_PATTERN = "yyyy/MM/dd HH:mm:ss";
    public static final FastDateFormat EN_DATETIME_FORMAT = FastDateFormat.getInstance(EN_DATETIME_PATTERN);

    public static final String CN_DATE_PATTERN = "yyyy年MM月dd日";
    public static final FastDateFormat CN_DATE_FORMAT = FastDateFormat.getInstance(CN_DATE_PATTERN);
    public static final String CN_DATE_MONTH_PATTERN = "yyyy年MM月";
    public static final FastDateFormat CN_DATE_MONTH_FORMAT = FastDateFormat.getInstance(CN_DATE_MONTH_PATTERN);
    public static final String CN_DATETIME_MINUTE_PATTERN = "yyyy年MM月dd日 HH:mm";
    public static final FastDateFormat CN_DATETIME_MINUTE_FORMAT = FastDateFormat.getInstance(CN_DATETIME_MINUTE_PATTERN);
    public static final String CN_DATETIME_PATTERN = "yyyy年MM月dd日 HH:mm:ss";
    public static final FastDateFormat CN_DATETIME_FORMAT = FastDateFormat.getInstance(CN_DATETIME_PATTERN);

    public static final String SIMPLE_DATE_MONTH_PATTERN = "yyyy-MM";
    public static final FastDateFormat SIMPLE_DATE_MONTH_FORMAT = FastDateFormat.getInstance(SIMPLE_DATE_MONTH_PATTERN);
    public static final String SIMPLE_DATE_DAY_PATTERN = "MM-dd";
    public static final FastDateFormat SIMPLE_DATE_DAY_FORMAT = FastDateFormat.getInstance(SIMPLE_DATE_DAY_PATTERN);
    public static final String SIMPLE_DATETIME_MINUTE_PATTERN = "MM-dd HH:mm";
    public static final FastDateFormat SIMPLE_DATETIME_MINUTE_FORMAT = FastDateFormat.getInstance(SIMPLE_DATETIME_MINUTE_PATTERN);
    public static final String SIMPLE_DATETIME_SECOND_PATTERN = "MM-dd HH:mm:ss";
    public static final FastDateFormat SIMPLE_DATETIME_SECOND_FORMAT = FastDateFormat.getInstance(SIMPLE_DATETIME_SECOND_PATTERN);
    public static final String SIMPLE_TIME_MINUTE_PATTERN = "HH:mm";
    public static final FastDateFormat SIMPLE_TIME_MINUTE_FORMAT = FastDateFormat.getInstance(SIMPLE_TIME_MINUTE_PATTERN);

    public static final String NORM_TIME_PATTERN = "HH:mm:ss";
    public static final FastDateFormat NORM_TIME_FORMAT = FastDateFormat.getInstance(NORM_TIME_PATTERN);
    public static final String PURE_TIME_PATTERN = "HHmmss";
    public static final FastDateFormat PURE_TIME_FORMAT = FastDateFormat.getInstance(PURE_TIME_PATTERN);

    public static final String EN_SIMPLE_DATE_DAY_PATTERN = "MM/dd";
    public static final FastDateFormat EN_SIMPLE_DATE_DAY_FORMAT = FastDateFormat.getInstance(EN_SIMPLE_DATE_DAY_PATTERN);
    public static final String EN_SIMPLE_DATETIME_MINUTE_PATTERN = "MM/dd HH:mm";
    public static final FastDateFormat EN_SIMPLE_DATETIME_MINUTE_FORMAT = FastDateFormat.getInstance(EN_SIMPLE_DATETIME_MINUTE_PATTERN);
    public static final String EN_SIMPLE_DATETIME_SECOND_PATTERN = "MM/dd HH:mm:ss";
    public static final FastDateFormat EN_SIMPLE_DATETIME_SECOND_FORMAT = FastDateFormat.getInstance(EN_SIMPLE_DATETIME_SECOND_PATTERN);

    public static final String CN_SIMPLE_DATE_DAY_PATTERN = "MM月dd日";
    public static final FastDateFormat CN_SIMPLE_DATE_DAY_FORMAT = FastDateFormat.getInstance(CN_SIMPLE_DATE_DAY_PATTERN);
    public static final String CN_SIMPLE_DATETIME_MINUTE_PATTERN = "MM月dd日 HH:mm";
    public static final FastDateFormat CN_SIMPLE_DATETIME_MINUTE_FORMAT = FastDateFormat.getInstance(CN_SIMPLE_DATETIME_MINUTE_PATTERN);
    public static final String CN_SIMPLE_DATETIME_SECOND_PATTERN = "MM月dd日 HH:mm:ss";
    public static final FastDateFormat CN_SIMPLE_DATETIME_SECOND_FORMAT = FastDateFormat.getInstance(CN_SIMPLE_DATETIME_SECOND_PATTERN);

    public static final String SPECIAL_SIMPLE_DATE_PATTERN = "yyyy.MM.dd";
    public static final FastDateFormat SPECIAL_SIMPLE_DATE_FORMAT = FastDateFormat.getInstance(SPECIAL_SIMPLE_DATE_PATTERN);
    public static final String SPECIAL_SIMPLE_DATE_DAY_PATTERN = "MM.dd";
    public static final FastDateFormat SPECIAL_SIMPLE_DATE_DAY_FORMAT = FastDateFormat.getInstance(SPECIAL_SIMPLE_DATE_DAY_PATTERN);

    public static final String AD_DATETIME_PATTERN = "G y-MM-dd Z E HH:mm:ss:SSS a";
    public static final FastDateFormat AD_DATETIME_FORMAT = FastDateFormat.getInstance(AD_DATETIME_PATTERN);// 公元 2019-01-01 +0800 星期二 10:39:06:863 下午

    public static final String HTTP_DATETIME_PATTERN = "EEE, dd MMM yyyy HH:mm:ss z";
    public static final FastDateFormat HTTP_DATETIME_FORMAT;

    public static final String JDK_DATETIME_PATTERN = "EEE MMM dd HH:mm:ss zzz yyyy";
    public static final FastDateFormat JDK_DATETIME_FORMAT;

    public static final String UTC_PATTERN = "yyyy-MM-dd'T'HH:mm:ss'Z'";
    public static final FastDateFormat UTC_FORMAT;

    static {
        HTTP_DATETIME_FORMAT = FastDateFormat.getInstance(HTTP_DATETIME_PATTERN, TimeZone.getTimeZone("GMT"), Locale.US);
        JDK_DATETIME_FORMAT = FastDateFormat.getInstance(JDK_DATETIME_PATTERN, Locale.US);
        UTC_FORMAT = FastDateFormat.getInstance(UTC_PATTERN, TimeZone.getTimeZone("UTC"));
    }
}