时间工具类

private static ObjectMapper mapper = new ObjectMapper();

public static String getNowTime(){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return sdf.format(new Date());
}

public static String getNowTimeMills(){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
return sdf.format(new Date());
}

public static String getNowDate(){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(new Date());
}

public static String getNowDateStr(){
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
return sdf.format(new Date());
}