如何使用Golang将数据放入结构体中？

huangapple
go评论116阅读模式
英文:

How to put data in a struct with Golang?

问题

这是我的代码：

  1. package main
  3. import "fmt"
  5. type Species struct {
  6.     Human  []Info
  7.     Animal []Info
  8. }
  10. type Info struct {
  11.     Name   string
  12.     Number string
  13. }
  15. func main() {
  17.     var data Species
  18.     data = Species{
  19.         Human: []Info{
  20.             {Name: "dave", Number: "00001"},
  21.             {Name: "jack", Number: "00002"},
  22.             {Name: "nate", Number: "00003"},
  23.         },
  24.         Animal: []Info{
  25.             {Name: "ko", Number: "00004"},
  26.             {Name: "na", Number: "00005"},
  27.         },
  28.     }
  29.     fmt.Println(data)
  31. }

在代码中的????处，你可以这样写：

  1. data = Species{
  2.     Human: []Info{
  3.         {Name: "dave", Number: "00001"},
  4.         {Name: "jack", Number: "00002"},
  5.         {Name: "nate", Number: "00003"},
  6.     },
  7.     Animal: []Info{
  8.         {Name: "ko", Number: "00004"},
  9.         {Name: "na", Number: "00005"},
  10.     },
  11. }

这样就可以将数据填充到data结构体中了。

英文:

Here is my code:

  1. package main
  3. import "fmt"
  5. type Species struct {
  6.         Human  []Info
  7.         Animal []Info
  8. }
  10. type Info struct {
  11.         Name   string
  12.         Number string
  13. }
  15. func main() {
  17.         var data Species
  18.         data = ????
  19.         fmt.Println(data)
  21. }

I want to see it as json like this:

  1. {
  2. "human":[
  3. {"name":"dave","number":"00001"},
  4. {"name":"jack","number":"00002"},
  5. {"name":"nate","number":"00003"}
  6. ],
  7. "animal":[
  8. {"name":"ko","number":"00004"},
  9. {"name":"na","number":"00005"}
  10. ]
  11. }

I don't know how to put in data that struct. What do I write on '???' in code?

答案1

得分: 0

使用encoding/json包可以进行JSON格式的编码和解码。

  1. package main
  3. import (
  4. 	"encoding/json"
  5. 	"fmt"
  6. )
  8. type Species struct {
  9. 	Human  []Info `json:"human"`
  10. 	Animal []Info `json:"animal"`
  11. }
  13. type Info struct {
  14. 	Name   string `json:"name"`
  15. 	Number string `json:"number"`
  16. }
  18. func main() {
  19. 	data := Species{
  20. 		Human: []Info{
  21. 			Info{Name: "dave", Number: "00001"},
  22. 			Info{Name: "jack", Number: "00002"},
  23. 		},
  24. 		Animal: []Info{
  25. 			Info{Name: "ko", Number: "00004"},
  26. 			Info{Name: "na", Number: "00005"},
  27. 		},
  28. 	}
  30. 	b, err := json.MarshalIndent(data, "", "  ")
  31. 	if err != nil {
  32. 		fmt.Println("error:", err)
  33. 	}
  35. 	fmt.Println(string(b))
  36. }

你可以在这里找到完整的代码。

英文:

form [json][1] pkg you can encoding and decoding JSON format

  1. package main
  3. import (
  4. 	"encoding/json"
  5. 	"fmt"
  6. )
  8. type Species struct {
  9. 	Human  []Info `json:"human"`
  10. 	Animal []Info `json:"animal"`
  11. }
  13. type Info struct {
  14. 	Name   string `json:"name"`
  15. 	Number string `json:"number"`
  16. }
  18. func main() {
  19. 	data := Species{
  20. 		Human: []Info{
  21. 			Info{Name: "dave", Number: "00001"},
  22. 			Info{Name: "jack", Number: "00002"},
  23. 		},
  24. 		Animal: []Info{
  25. 			Info{Name: "ko", Number: "00004"},
  26. 			Info{Name: "na", Number: "00005"},
  27. 		},
  28. 	}
  30. 	b, err := json.MarshalIndent(data, "", "  ")
  31. 	if err != nil {
  32. 		fmt.Println("error:", err)
  33. 	}
  35. 	fmt.Println(string(b))
  36. }

https://play.golang.org/p/evQto70Z8y
[1]: https://golang.org/pkg/encoding/json/

huangapple
  • 本文由 发表于 2017年3月12日 02:55:55
  • 转载请务必保留本文链接：https://go.coder-hub.com/42739268.html
  • arrays
  • go
  • json
  • struct
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