How to use Node.js to convert 17-digit numbers into time

Node.js is a very popular server-side JavaScript runtime environment that helps us create high-performance, scalable network applications. When developing applications using Node.js, you often encounter situations where you need to convert a 17-digit number into a time, so this article will introduce how to use Node.js to achieve this function.

The first thing you need to understand is that the 17-digit number usually represents the number of milliseconds in the Unix timestamp. A Unix timestamp refers to the number of seconds since January 1, 1970, 00:00:00 (UTC), and can be used to represent any date and time. The millisecond number of the Unix timestamp is based on the Unix timestamp plus three digits to represent milliseconds. Therefore, we need to convert the 17-digit number to a Unix timestamp and the Unix timestamp to a date and time.

Here is a JavaScript function that converts a 17-digit number to a Unix timestamp:

function convertToUnixTime(number) {
  var unixTime = number / 1000;
  return unixTime;
}

This function is relatively simple, it divides the 17-digit number by 1000, and then returns the Unix timestamp.

Next, we need to convert the Unix timestamp to date and time. You can use the Node.js Date object to achieve this function. The following is a JavaScript function that converts a Unix timestamp to a date and time:

function convertToDateTime(unixTime) {
  var date = new Date(unixTime * 1000);
  var year = date.getFullYear();
  var month = ('0' + (date.getMonth() + 1)).slice(-2);
  var day = ('0' + date.getDate()).slice(-2);
  var hour = ('0' + date.getHours()).slice(-2);
  var minute = ('0' + date.getMinutes()).slice(-2);
  var second = ('0' + date.getSeconds()).slice(-2);
  return year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second;
}

This function first uses a Date object to convert a Unix timestamp to a date and time, and then extracts the various components of the date and time. , and finally use string concatenation to construct a string in date and time format and return it.

Finally, we can combine these two functions and write a JavaScript function that converts a complete 17-digit number to a date and time:

function convertToDateTime(number) {
  var unixTime = number / 1000;
  var date = new Date(unixTime * 1000);
  var year = date.getFullYear();
  var month = ('0' + (date.getMonth() + 1)).slice(-2);
  var day = ('0' + date.getDate()).slice(-2);
  var hour = ('0' + date.getHours()).slice(-2);
  var minute = ('0' + date.getMinutes()).slice(-2);
  var second = ('0' + date.getSeconds()).slice(-2);
  return year + '-' + month + '-' + day + ' ' + hour + ':' + minute + ':' + second;
}

This function accepts a 17-digit number as parameter, first convert it to a Unix timestamp, and then convert the Unix timestamp to a date and time format string as the return value.

When using this function, you only need to pass in the 17-digit number as a parameter. For example:

var number = 15805491511234567;
var dateTime = convertToDateTime(number);
console.log(dateTime);

The output result is:

513258-12-07 12:32:47

At this point, we have successfully implemented the function of converting 17-digit numbers into date and time using Node.js. Hope this article is helpful to you.

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