time.Time.UnmarshalJSON() Function in Golang with Examples
Last Updated :
10 May, 2020
In Go language, time packages supply the functionality for determining as well as viewing time. The UnmarshalJSON() function in Go language is used to implement the json.Unmarshaler interface. The time here is a quoted-string which is in RFC 3339 format. Moreover, this function is defined under the time package. Here, you need to import the “time” package in order to use these functions.
Syntax:
func (t *Time) UnmarshalJSON(data []byte) error
Here, “t” is the pointer to the stated time, and “data” is the byte slice that represents JSON’s encoding that was generated by MarshalJSON() method.
Return value: It decodes the encoding that was returned by MarshalJSON() method and returns an error occurred but if there is no error then “nil” is returned.
Example 1:
package main
import "fmt"
import "time"
func main() {
t := time .Date(2013, 7, 6, 12, 34, 33, 01, time .UTC)
encoding, _ := t.MarshalJSON()
var tm time .Time
decode := tm .UnmarshalJSON(encoding)
fmt.Printf( "Error: %v\n" , decode)
}
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Output:
Error: <nil>
Example 2:
package main
import "fmt"
import "time"
func main() {
t := time .Date(2034, 45, 33, 43, 90, 70, 6447, time .UTC)
encoding, _ := t.MarshalJSON()
var tm time .Time
decode := tm .UnmarshalJSON(encoding)
fmt.Printf( "Error: %v\n" , decode)
}
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Output:
Error: <nil>
Here, the “t” stated in the above code has values that are outside usual range but they are normalized while conversion.
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