Golang-无法解析JSON

Question

I've started learning GO, and i have encountered this issue. I have this code

package main

import (
  "fmt"
  "encoding/json"
//  "net/html"
)


func main(){
  type Weather struct {
    name string
    cod float64
    dt float64
    id float64
  }

  var rawWeather = []byte(`{"name":"London","cod":200,"dt":1407100800,"id":2643743}`)
  var w Weather
  err := json.Unmarshal(rawWeather, &w)
  if err != nil {
    fmt.Println("Some error", err)
  }
  fmt.Printf("%+v
",w)
}

when i run it, it shows this

[nap@rhel projects]$ go run euler.go 
{name: cod:0 dt:0 id:0}

So, the JSON is not parsed into the weather struct.

Any ideas, why do this happens like this?

Answer 1

By quessing, i found, that this code works:

package main

import (
  "fmt"
  "encoding/json"
//  "net/html"
)


func main(){
  type Weather struct {
    Name string
    Cod float64
    Dt float64
    Id float64
  }

  var rawWeather = []byte(`[{"name":"London","cod":200,"dt":1407100800,"id":2643743}]`)
  var w []Weather
  err := json.Unmarshal(rawWeather, &w)
  if err != nil {
    fmt.Println("Some error", err)
  }
  fmt.Printf("%+v
",w)
}

So, the struct field names have to be Capitalized to work properly!