Golang web基础——JSON

    func Marshal(v interface{}) ([]byte, error)

// MarshalIndent 很像 Marshal，只是用缩进对输出进行格式化
func MarshalIndent(v interface{}, prefix, indent string) ([]byte, error)

type Student struct {
    Name string
    Age int
}
type Classes struct {
    St []Student `json:"students"`
}
func main() {
    var s Classes
    str := `{"students":[{"name":"foo","age":18},{"name":"bar","age":20}]}`
    err := json.Unmarshal([]byte(str), &s)
    fmt.Printf("json %v %v",s,err)
}

import (
    "fmt"
    "encoding/json"
)

type Student struct {
    Id int64 `json:"-"`
    Name string `json:"name,omitempty"`
    Age int `json:"age,string"`
}
type Classes struct {
    Students []Student `json:"students"`
}


func main() {
    var c Classes
    c.Students = append(c.Students, Student{Id :2000,Name: "stdu1", Age: 18})
    c.Students = append(c.Students, Student{Id :2001,Name: "stdu2", Age: 20})
    c.Students = append(c.Students, Student{Id :2001,Name: "", Age: 20})
    b, err := json.Marshal(c)
    if err != nil {
        fmt.Println("json err:", err)
    }
    fmt.Println(string(b))
}