How to Convert Struct to String in Golang

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To convert a struct to a string in Go, you can use the “fmt.Sprintf()” function or “marshaling the struct into JSON string format”.

Method 1: Using the fmt.Sprintf() function

The “fmt.Sprintf()” method converts a struct to a string using the function. The “%+v” format specifier is used, which prints the struct with field names, making the output more readable.

Example

package main

import "fmt"

type Person struct {
  Name string
  Age int
  Gender string
}

func main() {
  person := Person{Name: "Krunal", Age: 30, Gender: "male"}

  // Convert the struct to a string using fmt.Sprintf
  personString := fmt.Sprintf("%+v", person)
    fmt.Println(personString)
}

Output

{Name:Krunal Age:30 Gender:male}

In the above code example, we created a Person struct and used the fmt.Sprintf() function with the %+v format specifier converts the struct to a string.

The %+v specifier prints the struct with field names, making it more readable.

Method 2: Marshaling the struct into a json string

This approach involves converting a struct to a JSON string using the “json.Marshal()” function. JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write. This approach provides a more structured and human-readable format for the struct, making it suitable for data interchange or storage purposes.

Example

package main

import (
  "encoding/json"
  "fmt"
  "log"
)

type Person struct {
  Name string `json:"name"`
  Age int `json:"age"`
  Gender string `json:"gender"`
}

func main() {
  person := Person{Name: "Krunal", Age: 30, Gender: "male"}

  // Marshal the struct into JSON format
  jsonBytes, err := json.Marshal(person)
  if err != nil {
    log.Fatalf("Error marshaling struct: %v", err)
  }

  // Convert the JSON bytes to a string
  personString := string(jsonBytes)
  fmt.Println(personString)
}

Output

{"name":"Krunal","age":30,"gender":"male"}

In this code example, we created a Person struct and used the “json.Marshal()” function to convert the struct into a JSON string.

The JSON format is more suitable for data interchange or when you need to store the struct in a human-readable format.

Both approaches have their use cases, and you can select the one that suits your needs better.

The “fmt.Sprintf()” method provides a simple string representation, while the JSON method provides a more structured, human-readable format.

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