英文:
Go JSON with simplejson
问题
尝试使用来自"github.com/bitly/go-simplejson"的JSON库。
url := "http://api.stackoverflow.com/1.1/tags?pagesize=100&page=1"res, err := http.Get(url)body, err := ioutil.ReadAll(res.Body)fmt.Printf("%s\n", string(body)) //WORKSjs, err := simplejson.NewJson(body)total, _ := js.Get("total").String()fmt.Printf("Total:%s"+total)
但似乎不起作用！？
尝试访问total和tag字段。
英文:
Trying to use the JSON lib from "github.com/bitly/go-simplejson"
url = "http://api.stackoverflow.com/1.1/tags?pagesize=100&page=1"res, err := http.Get(url)body, err := ioutil.ReadAll(res.Body)fmt.Printf("%s\n", string(body)) //WORKSjs, err := simplejson.NewJson(body)total,_ := js.Get("total").String()fmt.Printf("Total:%s"+total )
But it seems it doenst work !?
Trying to access the total and tag fields
答案1
得分: 5
你有几个错误：
- 如果你检查JSON响应，你会注意到
total字段不是字符串，所以在访问该字段时应该使用MustInt()方法，而不是String()。 Printf()方法的调用完全错误。你应该传递一个“模板”，然后根据“占位符”的数量传递相应的参数。
顺便说一句，我强烈建议你在每个地方都检查err != nil，这会对你有很大帮助。
这是一个可工作的示例：
package mainimport ("fmt""github.com/bitly/go-simplejson""io/ioutil""log""net/http")func main() {url := "http://api.stackoverflow.com/1.1/tags?pagesize=100&page=1"res, err := http.Get(url)if err != nil {log.Fatalln(err)}body, err := ioutil.ReadAll(res.Body)if err != nil {log.Fatalln(err)}// fmt.Printf("%s\n", string(body))js, err := simplejson.NewJson(body)if err != nil {log.Fatalln(err)}total := js.Get("total").MustInt()if err != nil {log.Fatalln(err)}fmt.Printf("Total:%s", total)}
英文:
You have a few mistakes:
- If you'll check the JSON response you'll notice that
totalfield is not string, that's why you should useMustInt()method, notString(), when you are accessing the field. Printf()method invocation was totally wrong. You should pass a "template", and then pass arguments appropriate to the number of "placeholders".
By the way, I strongly recomend you to check err != nil everywhere, that'll help you a lot.
Here is the working example:
package mainimport ("fmt""github.com/bitly/go-simplejson""io/ioutil""log""net/http")func main() {url := "http://api.stackoverflow.com/1.1/tags?pagesize=100&page=1"res, err := http.Get(url)if err != nil {log.Fatalln(err)}body, err := ioutil.ReadAll(res.Body)if err != nil {log.Fatalln(err)}// fmt.Printf("%s\n", string(body))js, err := simplejson.NewJson(body)if err != nil {log.Fatalln(err)}total := js.Get("total").MustInt()if err != nil {log.Fatalln(err)}fmt.Printf("Total:%s", total)}
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论