How to implement JSON encoding and decoding in Golang?

In Golang, you can use the encoding/json package to encode and decode JSON. Here is a simple example:

package main

import (
    "encoding/json"
    "fmt"
)

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

func main() {
    // 编码为JSON
    person := Person{
        Name: "Alice",
        Age:  25,
    }
    jsonData, err := json.Marshal(person)
    if err != nil {
        fmt.Println("JSON encoding error:", err)
        return
    }
    fmt.Println(string(jsonData))

    // 解码JSON
    var decodedPerson Person
    err = json.Unmarshal(jsonData, &decodedPerson)
    if err != nil {
        fmt.Println("JSON decoding error:", err)
        return
    }
    fmt.Println(decodedPerson)
}

In the example above, we defined a Person structure and specified the corresponding field names in JSON using json tags. Next, we encoded the Person structure into a JSON string using the json.Marshal function, and then decoded the JSON string back into a Person structure using the json.Unmarshal function.

The output result of the above example is:

{"name":"Alice","age":25}
{Name:Alice Age:25}

In this way, we have successfully completed the encoding and decoding of JSON.