Go - 结构体

//demo_11.go
package main
import (
 "fmt"
)
type Person struct {
 Name string
 Age int
}
func main() {
 var p1 Person
    p1.Name = "Tom"
    p1.Age = 30
    fmt.Println("p1 =", p1)
 var p2 = Person{Name:"Burke", Age:31}
    fmt.Println("p2 =", p2)
    p3 := Person{Name:"Aaron", Age:32}
    fmt.Println("p2 =", p3)
 //匿名结构体
    p4 := struct {
 Name string
 Age int
 } {Name:"匿名", Age:33}
    fmt.Println("p4 =", p4)
}

//demo_12.go
package main
import (
 "encoding/json"
 "fmt"
)
type Result struct {
 Code int `json:"code"`
 Message string `json:"msg"`
}
func main() {
 var res Result
    res.Code = 200
    res.Message = "success"
 //序列化
    jsons, errs := json.Marshal(res)
 if errs != nil {
        fmt.Println("json marshal error:", errs)
 }
    fmt.Println("json data :", string(jsons))
 //反序列化
 var res2 Result
    errs = json.Unmarshal(jsons, &res2)
 if errs != nil {
        fmt.Println("json unmarshal error:", errs)
 }
    fmt.Println("res2 :", res2)
}

//demo_13.go
package main
import (
 "encoding/json"
 "fmt"
)
type Result struct {
 Code int `json:"code"`
 Message string `json:"msg"`
}
func main() {
 var res Result
    res.Code = 200
    res.Message = "success"
    toJson(&res)
    setData(&res)
    toJson(&res)
}
func setData (res *Result) {
    res.Code = 500
    res.Message = "fail"
}
func toJson (res *Result) {
    jsons, errs := json.Marshal(res)
 if errs != nil {
        fmt.Println("json marshal error:", errs)
 }
    fmt.Println("json data :", string(jsons))
}