golang类型转化

 int 转 float

var sum int = 17 mean:= float32(sum)

 

float 转 int

a := 5.0
b := int(a)

 

string 转 int

i,_ := strconv.Atoi("3")
fmt.println(3 + i) // 6

 

int 转 string

fmt.println("a" + strconv.Itoa(32)) // a32

interface 转 string

var v1 interface{}="asdf"
fmt.Println(v1.(string))

 

interface 转 int

var v2 interface{}=123
fmt.Println(v2.(int)+1) //124

 

string 转 []byte

var str string = "test"
var b []byte = []byte(str)

 

[]byte 转 string

var str string = string(b)
var str string = string(b[:]) //or

对象转json字符串

str,err:=json.Marshal(stu)

json字符串转对象

stb := &Student{} 
err = json.Unmarshal([]byte(strData), &stb)