type Customer struct { Name string `json:"name"` } type UniversalDTO struct { Data interface{} `json:"data"` // more fields with important meta-data about the message... } func main() { // create a customer, add it to DTO object and marshal it customer := Customer{Name: "Ben"}...
type PersonInterfaceinterface{ GetName()stringGetAge()int} AI代码助手复制代码 实现一个函数,将接口类型转换为结构体类型。例如: funcConvertInterfaceToStruct(p PersonInterface)(Person,error) { jsonStr, err := json.Marshal(p)iferr !=nil{returnPerson{}, err }varperson Person err = json.Unmarshal(...
cannot convert data (type interface {}) to type string: need type assertion 119 Cannot convert []string to []interface {} 0 Can't convert []interface{} to []string in Go 0 How do I json decode interface slice in Go? Related 119 Cannot convert []string to []interface {} 3 ...
type Convert struct { data interface {} } func (r Convert) toString() string { fmt.Printf("类型是:%s\r\n", reflect.TypeOf(r.data)) switch r.data.(type) { case string: return string(r.data.(string)) case []uint8: return string(r.data.([]byte)) case int: return strconv.Itoa...
(iinterface{}, format ...string) time.TimefuncTimeDuration(iinterface{}) time.Duration// 对象转换funcStruct(paramsinterface{}, objPointerinterface{}, attrMapping ...map[string]string)error// 根据类型名称执行基本类型转换(非struct转换))funcConvert(iinterface{}, tstring, extraParams ...interface...
type nr number // alias type func main() { a := number{5.0} b := nr{5.0} // var i float32 = b // compile-error: cannot use b (type nr) as type float32 in assignment // var i = float32(b) // compile-error: cannot convert b (type nr) to type float32 ...
t.Logf("y type=%T val=%#v", y, y)varfint=10varh *int= &fvaro *int64//int和int64指针直接转换编译器报错因为有可能溢出改用unsafe//cannot convert p (type *int) to type *int64//o = (*int64)(h)o = (*int64)(unsafe.Pointer(h)) ...
var i interface{}i 就是一个空接口类型,我们知道可以把任意类型的值,赋给一个空接口类型。 我们在源码中找到空接口数据结构的定义: typeefacestruct{_type*_type// 动态类型dataunsafe.Pointer// 原数据地址} 咱们注意一下_type类型, 它代表了Golang 所有的数据类型的元数据。所有数据类型都是在它的基础上,...
type Usb interface { //声明了两个没有实现的方法 Start() Stop() } //手机 type Phone struct { } //让Phone实现Usb接口的方法 func (p Phone) Start() { fmt.Println("手机开始工作") } func (p Phone) Stop() { fmt.Println("手机停止工作") ...
funcuseInterface(iinterface{}){// 第一种方式,适合用于判断i是否为某一类型ifconvert,ok:=i.(float64);ok{// do sth}// 第二种方式,使用switch来进行判断switchx:=i.(type){casefloat64:// do sthcasestring:// do sthcaseint32:// do sth}} ...