Java

JSON Date Parsing

See more JSON Examples

Demonstrates how to parse date/time strings from JSON.

Note: This example uses the DtOf and DateOf methods introduced in Chilkat v9.5.0.73

Chilkat2 Java

import com.chilkatsoft.chilkat2.DateTime;
import com.chilkatsoft.chilkat2.DtObj;
import com.chilkatsoft.chilkat2.JsonObject;

public class ChilkatExample {

    public static void main(String[] args) {
        JsonObject json = new JsonObject();
        json.setEmitCompact(false);

        // First, let's create JSON containing some date/time strings.
        json.updateString("test.timestamp", "2018-01-30T20:35:00Z");
        json.updateString("test.rfc822", "Tue, 24 Apr 2018 08:47:03 -0500");
        json.updateString("test.dateStrings[0]", "2018-01-30T20:35:00Z");
        json.updateString("test.dateStrings[1]", "Tue, 24 Apr 2018 08:47:03 -0500");
        json.updateNumber("test.StartLoggingTime", "1446834998.695");
        json.updateNumber("test.Expiration", "1442877512.0");
        json.updateInt("test.StartTime", 1518867432);

        System.out.println(json.emit());

        // We've built the following JSON:

        // {
        //   "test": {
        //     "timestamp": "2018-01-30T20:35:00Z",
        //     "rfc822": "Tue, 24 Apr 2018 08:47:03 -0500",
        //     "dateStrings": [
        //       "2018-01-30T20:35:00Z",
        //       "Tue, 24 Apr 2018 08:47:03 -0500"
        //     ],
        //     "StartLoggingTime": 1446834998.695,
        //     "Expiration": 1442877512.0,
        //     "StartTime": 1518867432
        //   }
        // }

        // Use the DateOf and DtOf methods to load Chilkat date/time objects with the date/time values.
        // The CkDateTime object is primarily for loading a date/time from numerous formats, and then getting
        // the date/time in various formats.  Thus, it's primarly for date/time format conversion.
        // The DtObj object holds a date/time where the individual components (day, month, year, hour, minutes, etc.) are
        // immediately accessible as integers.
        DateTime dateTime = new DateTime();
        DtObj dt = new DtObj();
        boolean getAsLocal = false;

        // Load the date/time at test.timestamp into the dateTime object.
        json.dateOf("test.timestamp", dateTime);
        System.out.println(dateTime.getAsTimestamp(getAsLocal));
        System.out.println(dateTime.getAsUnixTime(false));
        System.out.println(dateTime.getAsRfc822(getAsLocal));

        json.dateOf("test.rfc822", dateTime);
        System.out.println(dateTime.getAsTimestamp(getAsLocal));

        json.setI(0);
        json.dateOf("test.dateStrings[i]", dateTime);
        System.out.println(dateTime.getAsTimestamp(getAsLocal));

        json.setI(1);
        json.dateOf("test.dateStrings[i]", dateTime);
        System.out.println(dateTime.getAsTimestamp(getAsLocal));

        json.dateOf("test.StartLoggingTime", dateTime);
        System.out.println(dateTime.getAsTimestamp(getAsLocal));

        json.dateOf("test.Expiration", dateTime);
        System.out.println(dateTime.getAsTimestamp(getAsLocal));

        json.dateOf("test.StartTime", dateTime);
        System.out.println(dateTime.getAsTimestamp(getAsLocal));

        // Output so far:

        //     2018-01-30T20:35:00Z
        //     1517344500
        //     Tue, 30 Jan 2018 20:35:00 GMT
        //     2018-04-24T13:47:03Z
        //     2018-01-30T20:35:00Z
        //     2018-04-24T13:47:03Z
        //     2015-11-07T00:36:38Z
        //     2015-09-22T04:18:32Z
        //     2018-02-17T17:37:12Z

        // Now load the date/time strings into the dt object:
        json.dtOf("test.timestamp", getAsLocal, dt);
        System.out.println("month=" + dt.getMonth() + ", day=" + dt.getDay() + ", year=" + dt.getYear() + ", hour=" + dt.getHour() + ", minute=" + dt.getMinute());

        json.dtOf("test.rfc822", getAsLocal, dt);
        System.out.println("month=" + dt.getMonth() + ", day=" + dt.getDay() + ", year=" + dt.getYear() + ", hour=" + dt.getHour() + ", minute=" + dt.getMinute());

        json.setI(0);
        json.dtOf("test.dateStrings[i]", getAsLocal, dt);
        System.out.println("month=" + dt.getMonth() + ", day=" + dt.getDay() + ", year=" + dt.getYear() + ", hour=" + dt.getHour() + ", minute=" + dt.getMinute());

        json.setI(1);
        json.dtOf("test.dateStrings[i]", getAsLocal, dt);
        System.out.println("month=" + dt.getMonth() + ", day=" + dt.getDay() + ", year=" + dt.getYear() + ", hour=" + dt.getHour() + ", minute=" + dt.getMinute());

        json.dtOf("test.StartLoggingTime", getAsLocal, dt);
        System.out.println("month=" + dt.getMonth() + ", day=" + dt.getDay() + ", year=" + dt.getYear() + ", hour=" + dt.getHour() + ", minute=" + dt.getMinute());

        json.dtOf("test.Expiration", getAsLocal, dt);
        System.out.println("month=" + dt.getMonth() + ", day=" + dt.getDay() + ", year=" + dt.getYear() + ", hour=" + dt.getHour() + ", minute=" + dt.getMinute());

        json.dtOf("test.StartTime", getAsLocal, dt);
        System.out.println("month=" + dt.getMonth() + ", day=" + dt.getDay() + ", year=" + dt.getYear() + ", hour=" + dt.getHour() + ", minute=" + dt.getMinute());

        // Output:

        // month=1, day=30, year=2018, hour=20, minute=35
        // month=4, day=24, year=2018, hour=13, minute=47
        // month=1, day=30, year=2018, hour=20, minute=35
        // month=4, day=24, year=2018, hour=13, minute=47
        // month=11, day=6, year=2015, hour=18, minute=36
        // month=9, day=21, year=2015, hour=23, minute=18
        // month=2, day=17, year=2018, hour=11, minute=37
    }
}