Methods to implement JSON serialization and deserialization in Golang

How to implement JSON serialization and deserialization in Golang

JSON (JavaScript Object Notation) is a commonly used data exchange format, which is in the form of text Represents structured data. In Golang, we can use the built-in encoding/json package to implement JSON serialization and deserialization operations.

1. JSON serialization

JSON serialization refers to converting data types in Go language into strings that conform to JSON format. In Golang, we can implement JSON serialization through the Marshal function.

The following is a simple example:

package main

import (
    "encoding/json"
    "fmt"
)

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

func main() {
    person := Person{
        Name: "小明",
        Age:  20,
    }

    jsonBytes, err := json.Marshal(person)
    if err != nil {
        fmt.Println("JSON序列化失败:", err)
        return
    }

    jsonString := string(jsonBytes)
    fmt.Println("JSON序列化结果:", jsonString)
}

Run the above code, the output result is:

JSON序列化结果: {"name":"小明","age":20}

In the above example, we defined a Person structure, and Use the Marshal function to serialize the Person structure instance person into a JSON string. By setting the json tag of the structure field, we can specify the name of the field in JSON.

2. JSON deserialization

JSON deserialization refers to converting strings that conform to JSON format into data types in the Go language. In Golang, we can implement JSON deserialization through the Unmarshal function.

The following is a simple example:

package main

import (
    "encoding/json"
    "fmt"
)

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

func main() {
    jsonString := `{"name":"小明","age":20}`

    var person Person
    err := json.Unmarshal([]byte(jsonString), &person)
    if err != nil {
        fmt.Println("JSON反序列化失败:", err)
        return
    }

    fmt.Println("JSON反序列化结果:", person)
}

Run the above code, the output result is:

JSON反序列化结果: {小明 20}

In the above example, we first define a character in JSON format String jsonString. Next, use the Unmarshal function to deserialize jsonString into Person structure instance person. It should be noted that the first parameter of the Unmarshal function is a byte slice, and the string needs to be converted into a byte slice.

Summary:

By using the Marshal and Unmarshal functions in the encoding/json package, we can implement JSON serialization and deserialization operations in Golang. In actual development, JSON serialization and deserialization are very common operations, especially when interacting with the front end or processing external API data. Mastering these skills can greatly improve our development efficiency.

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