Java获取当前时间，以及当前时间友好显示及MD5加密

SimpleDateFormat formatter = new SimpleDateFormat ("yyyy-MM-dd HH:mm:ss");
Date curDate = new Date(System.currentTimeMillis());//获取当前时间
String str = formatter.format(curDate);
LogUtil.w("当前系统时间：",str);

//获取单独年月日数字

Calendar now = Calendar.getInstance();
now_years = now.get(Calendar.YEAR);
now_months = now.get(Calendar.MONTH);
now_days = now.get(Calendar.DAY_OF_MONTH);

//系统拽出的判断时间方法，正确
public static String friendlyTime(String sdate) {

//        Date time = toDate(sdate);
SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date time = null;
try {
time = sf.parse(sdate);
} catch (ParseException e) {
e.printStackTrace();
}
LogUtil.w("aaaaaaaa+++++++++++++++++++++++++",time.getTime()+"");
//获取time距离当前的秒数
int ct = (int)((System.currentTimeMillis() - time.getTime())/1000);

if(ct == 0) {
return "刚刚";
}

if(ct > 0 && ct < 60) {
return ct + "秒前";
}

if(ct >= 60 && ct < 3600) {
return Math.max(ct / 60,1) + "分钟前";
}
if(ct >= 3600 && ct < 86400)
return ct / 3600 + "小时前";
if(ct >= 86400 && ct < 2592000){ //86400 * 30
int day = ct / 86400 ;
return day + "天前";
}
if(ct >= 2592000 && ct < 31104000) { //86400 * 30
return ct / 2592000 + "月前";
}
return ct / 31104000 + "年前";
}

/**
* MD5加码。32位
*
* @param inStr
* @return
*/
public String MD5(String inStr) {
MessageDigest md5 = null;
try {
md5 = MessageDigest.getInstance("MD5");
char[] charArray = inStr.toCharArray();
byte[] byteArray = new byte[charArray.length];

for (int i = 0; i < charArray.length; i++)
byteArray[i] = (byte) charArray[i];

byte[] md5Bytes = md5.digest(byteArray);

StringBuffer hexValue = new StringBuffer();

for (int i = 0; i < md5Bytes.length; i++) {
int val = ((int) md5Bytes[i]) & 0xff;
if (val < 16)
hexValue.append("0");
hexValue.append(Integer.toHexString(val));
}

return hexValue.toString();
} catch (Exception e) {
System.out.println(e.toString());
e.printStackTrace();
return "";
}
}