How can I validate JSON data in Go using structs?

How can I validate JSON data in Go using structs?

You can use the encoding/json package to unmarshal JSON into structs and validate them using struct tags.

Can you show me an example of a struct with validation tags?

Sure! Here's a simple example:

type User struct {
    Name  string `json:"name" validate:"required"`
    Age   int    `json:"age" validate:"gte=0,lte=130"`
}

How do I perform the actual validation after unmarshalling?

You can use a validation library like go-playground/validator. After unmarshalling, call the Validate method on your struct.

What if the JSON doesn't match the struct?

If the JSON doesn't match, the unmarshalling will return an error, and you can handle it accordingly.