This article mainly introduces to you the relevant content about Golang's analysis of json data. It is shared for your reference and learning. I won't say much below. Let's take a look at the detailed introduction together:
Use Golang to parse json data. This json format is an array of objects. The official documentation has an example:
var jsonBlob = []byte(`[
{"Name": "Platypus", "Order": "Monotremata"},
{"Name": "Quoll", "Order": "Dasyuromorphia"}
]`)
type Animal struct {
Name string
Order string
}
var animals []Animal
err := (jsonBlob, &animals)
if err != nil {
("error:", err)
}
("%+v", animals)
It can parse objects of json data into the corresponding structure.
If it is a one-dimensional array, the form of key-value pairs is: {"A":3,"B":3,"C":5,"D":5}, the code is as follows:
func main() {
jsonData := []byte(`{"A":3,"B":3,"C":5,"D":5}`)
var a map[string]int
(jsonData, &a)
("%+v\n", a)
}
The json in the form of visible key-value pairs can be mapped into a map, orinterface{} .
If it is a value-only form, such as: ["a","b","c","d","e"], the code is as follows:
func main() {
jsonData := []byte(`["a","b","c","d","e"]`)
var a []string
(jsonData, &a)
("%+v\n", a)
}
It can be seen that only the form of values can be mapped into a slice.
Regarding json data parsing, the types are explained in function comments:
To unmarshal JSON into an interface value,Unmarshal stores one of these in the interface value:
bool, for JSON booleans
float64, for JSON numbers
string, for JSON strings
[]interface{}, for JSON arrays
map[string]interface{}, for JSON objects
nil for JSON null
Simulate PHPjson_decode($jsonString, true)function
However, depending on this situation, in PHP, ifjson_decode(‘[“a”,”b”,”c”,”d”,”e”]', true) This second parameter is true parsing json, which can be parsed into the form of an object with key-value pairs:
[ 0=>"a", 1=>"b", 2=>"c", 3=>"d", 4=>"e" ]
How to do this kind of Golang?
func main() {
jsonData := []byte(`["a","b","c","d","e"]`)
var a []string
(jsonData, &a)
newData := make(map[int]string)
for k, v := range a {
newData[k] = v
}
("%+v\n", newData)
}
There should be no built-in functions, so just implement it manually.
Summarize
The above is the entire content of this article. I hope that the content of this article will be of some help to everyone’s learning or using Go. If you have any questions, you can leave a message to communicate. Thank you for your support.