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Go allows us to serialize data from structures using a variety of simple standard methods.

Converting a structure to a string using String method in Go

The GoLang package String helps implement simple functions to manipulate and edit UTF-8 encoded strings.

Sample code:

package main

import "fmt"

type myStructure struct {
    bar string
}

func (f myStructure) String() string {
    return fmt.Sprintf("The structure I made has the following data: %s", f.bar)
}

func main() {
    fmt.Println(myStructure{"Hello, World! GoLang is fun!"})
}

Output:

The structure I made has the following data: Hello, World! GoLang is fun!

In the code above, we attached a String() function to a named structure called myStructure, which allows us to convert a structure into a string.

Convert structs to JSON using json.Marshal method in Go

The GoLang encoding/json package has utilities that can be used to convert to and from JSON. The json.Marshal method can convert a struct to JSON.

Sample code:

package main

import (
    "encoding/json"
    "fmt"
)

func main() {
    type MyStructure struct {
        Message string `json:"From Structure"`
    }

    val := &MyStructure{
        Message: "Hello, World!",
    }

    // convert struct to json string
    jsonBytes, err := json.Marshal(val)

    fmt.Println(string(jsonBytes), err)

}

Output:

{"From Structure":"Hello, World!"} <nil>

请注意, when using the above method, external libraries can only use the exported fields of the defined structure. Therefore, only the exported fields of our structure will be copied into the converted JSON string.