时间转字符串，时间比较

package com.example.maptest.mycartest.Utils;

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

/**
* Created by ${Author} on 2017/3/24.
* Use to
*/

public class DateChangeUtil {

/*字符串转时间*/
public static Date StrToDate(String str) {

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = null;
try {
date = format.parse(str);
} catch (ParseException e) {
e.printStackTrace();
}
return date;
}

public static String getdata(long date) {
String dates = null;
long nd = 1000 * 24 * 60 * 60;
long nh = 1000 * 60 * 60;
long nm = 1000 * 60;

long day = date / nd;
// 计算差多少小时
long hour = date % nd / nh;
// 计算差多少分钟
long min = date % nd % nh / nm;
// 计算差多少秒//输出结果
// long sec = diff % nd % nh % nm / ns;
//        return day + "天" + hour + "小时" + min + "分钟";
dates = day + "天" + hour + "小时" + min + "分钟";
return dates;
}
}