如何从SpringBoot的RestController中的REST请求中获取Calendar字段？

Question

I am getting date in POST request in @RestController with Json like this: { "date":"2016-01-28" } How can I get object with type java.util.Calendar ? Usually I use java.util.Date , but almost all methods are deprecated. What Jackson annotation possible to use to get Calendar ? I tried to use

public class Test {
    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
    Calendar date;
}

but get null

Answer 1

You can use annotation @DateTimeFormat . According to Spring docs it's applicable to java.util.Calendar .

@PostMapping("/somemapping")
public void date(@RequestParam("date") @DateTimeFormat(pattern = "yyyy-MM-dd") Calendar date) {
   //some other processing code
}

Answer 2

I would suggest using a java.util.Date instead of a Calendar . At least in your repository object. If you need the additional functionality of a Calendar you can create an instance as demonstrated by @Hamza .

Calendar is a pretty heavy-weight class. No need to create a new instance of it considering the tiny amount of data you are storing.

You can pick out the date from another class that operates on it to provide you the additional functionality as required.

Answer 3

{
"calendar": 1558347802873  
}

Sample json request

just pass date in number format use below object

import java.util.Calendar;

public class TestCal {

private Calendar calendar;

public Calendar getCalendar() {
    return calendar;
}

public void setCalendar(Calendar calendar) {
    this.calendar = calendar;
}
}

sample spring Controller

    @PostMapping("/testCal")
    public void testCal(@RequestBody TestCal test) {

    // do your stuff
    test.getCalendar();


   }