将 java 数据列表转换为 JSON 数组数组

Question

Good morning, everyone. Hope you're well. Actually I'd like to convert a list with data into a JSON table of this form:

[[45.21406,5.74749,445,"2019-11-05T15:29:45Z"],
[45.21401,5.74752,470,"2019-11-05T15:29:46Z"],
[45.21397,5.74763,472,"2019-11-05T15:29:47Z"],
[45.21393,5.74789,471,"2019-11-05T15:29:48Z"],
[45.21389,5.74849,473,"2019-11-05T15:29:49Z"]
]

My code is the next:

    activity.longitude=result.getLastLocation().getLongitude();

    activity.latitude=result.getLastLocation().getLatitude();

    DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");

    activity.dateFormated= formatter.format(new Date());

    activity.altitude=result.getLastLocation().getAltitude();

    activity.data.add(activity.longitude);
    activity.data.add(activity.latitude);
    activity.data.add(activity.dateFormated);
    activity.data.add(activity.altitude);

Thank you very much for your help.

Answer 1

You need to use a JSON library to make this easy and correct. This is a simple one to get started with.

https://github.com/stleary/JSON-java

Answer 2

so this can be done using a host of different libraries but one that could be particularly helpful is Gson . Unfortunately you have not posted your POJO that represented these values so it's difficult to help you further and give an example but this should help.