客户端的int类型数据json序列化，上传到服务器后，golang按照map解析json结构会被升级为float64。
demo：
package main
import (
"encoding/json"
"fmt"
)
func main() {
// golang json
map1 := make(map[string]interface{})
var x int = 0
var y float64 = 1.1
map1["x"] = x
map1["y"] = y
var map1Json []byte
map1Json, _ = json.Marshal(map1)
map2 := make(map[string]interface{})
_ = json.Unmarshal(map1Json, &map2)
fmt.Printf("%v\n", map2)
for k, v := range map2 {
switch v.(type) {
case int:
fmt.Println("int", k, v)
case float64:
fmt.Println("float64", k, v)
}
}
}