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package com.aliyun.datahub.client.util;

import org.apache.commons.lang3.StringUtils;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateUtils {

    public static Date parseDateNoTime(String sDate) throws ParseException {
        DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
        if (sDate != null && sDate.length() >= "yyyyMMdd".length()) {
            if (!StringUtils.isNumeric(sDate)) {
                throw new ParseException("not all digit", 0);
            } else {
                return dateFormat.parse(sDate);
            }
        } else {
            throw new ParseException("length too little", 0);
        }
    }

    public static Date parseDateNoTime(String sDate, String format) throws ParseException {
        if (StringUtils.isBlank(format)) {
            throw new ParseException("null format.", 0);
        } else {
            DateFormat dateFormat = new SimpleDateFormat(format);
            if (sDate != null && sDate.length() >= format.length()) {
                return dateFormat.parse(sDate);
            } else {
                throw new ParseException("length too little.", 0);
            }
        }
    }
}