fuint-application/application-service/src/main/java/com/fuint/application/util/DateUtil.java

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package com.fuint.application.util;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.time.DateFormatUtils;
import org.apache.commons.lang.time.DateUtils;
import java.util.GregorianCalendar;
import java.math.BigDecimal;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Optional;

/**
 * DateUtil 工具类
 * Created by FSQ
 * Contact wx fsq_better
 * Site https://www.fuint.cn
 */
public class DateUtil {
    public static final String PATTERN_ISO_DATE = "yyyy-MM-dd";
    public static final String PATTERN_ISO_TIME = "HH:mm:ss";
    public static final String PATTERN_ISO_DATETIME = "yyyy-MM-dd HH:mm:ss";
    public static final String PATTERN_ISO_FULL = "yyyy-MM-dd HH:mm:ss.SSS";
    public static final String PATTERN_SIMPLE_DATE = "yyyyMMdd";
    public static final String PATTERN_SIMPLE_TIME = "HHmmss";
    public static final String PATTERN_SIMPLE_DATETIME = "yyyyMMddHHmmss";
    public static final String PATTERN_SIMPLE_FULL = "yyyyMMddHHmmssSSS";
    public static final String[] PATTERNS = new String[]{"yyyy-MM-dd", "HH:mm:ss", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm:ss.SSS", "yyyyMMdd", "HHmmss", "yyyyMMddHHmmss", "yyyyMMddHHmmssSSS"};

    public DateUtil() {
    }

    public static String formatDate(Date date, String pattern) {
        if(StringUtils.isEmpty(pattern)) {
            pattern = "yyyy-MM-dd";
        }

        return DateFormatUtils.format(date, pattern);
    }

    public static String formatDate(Calendar calendar, String pattern) {
        if(StringUtils.isEmpty(pattern)) {
            pattern = "yyyy-MM-dd";
        }

        return DateFormatUtils.format(calendar, pattern);
    }

    public static Date parseDate(String strDate) throws ParseException {
        return StringUtils.isEmpty(strDate)?null: DateUtils.parseDate(strDate, PATTERNS);
    }

    public static Date parseDate(String strDate, String... patterns) throws ParseException {
        return StringUtils.isEmpty(strDate)?null:DateUtils.parseDate(strDate, patterns);
    }

    public static String getNow(String pattern) {
        return formatDate((Calendar)Calendar.getInstance(), pattern);
    }