How to read json data in golang

JSON (JavaScript Object Notation) is a more lightweight data exchange format than XML. It is easy for people to read and write, and it is also easy for programs to parse and generate.

Go languageBuilt-in support for JSON. Using the encoding/json standard library built into the GO language, developers can easily use GO programs to generate and parse data in JSON format.

Example:

package main
import (
    "encoding/json"
    "fmt"
)
type Book struct {
    Title       string
    Author      []string
    Publisher   string
    Price       float64
    IsPublished bool
}
func main() {
    b := []byte(`{
    "Title":"go programming language",
    "Author":["john","ada","alice"],
    "Publisher":"qinghua",
    "IsPublished":true,
    "Price":99
  }`)
//先创建一个目标类型的实例对象，用于存放解码后的值
    var book Book
    err := json.Unmarshal(b, &book)
    if err != nil {
        fmt.Println("error in translating,", err.Error())
        return
    }
    fmt.Println(book.Author)
}

The Json.Unmarshal() function will search for fields in the target structure according to an agreed order, and match if one is found. These fields must all be exportable fields starting with a capital letter in the type declaration.

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