如何在结构体中解组字符串数组？

huangapple
go评论106阅读模式
英文:

How to unmarshal an Array of strings inside a struct?

问题

  1. package main
  2. import (
  3.     "fmt"
  4.      "encoding/json"
  5. )    
  6. type sample struct{
  7.     field []string `json:"field"`
  8. }
  9. func main() {
  10.   dummy:=sample{
  11.       field: []string{"color1","color2"},
  12.   }
  13.   text,_:=json.Marshal(dummy)
  14.   fmt.Println(text)
  15.   var dummy2 sample
  16.   json.Unmarshal(text,&dummy2)
  17.   fmt.Println(dummy2)
  18. }

在这段代码中，我试图将类型为sample的变量dummy进行编组，但是我得到了一些奇怪的字符串值，当我对该字符串进行解组时，我得到了一个空的结构体。请问正确的做法是什么？

英文: 
  1. package main
  2. import (
  3.     "fmt"
  4.      "encoding/json"
  5. )    
  6. type sample struct{
  7.     field []string `json:"field"`
  8. }
  9. func main() {
  10.   dummy:=sample{
  11.       field: []string{"color1","color2"},
  12.   }
  13.   text,_:=json.Marshal(dummy)
  14.   fmt.Println(text)
  15.   var dummy2 sample
  16.   json.Unmarshal(text,&dummy2)
  17.   fmt.Println(dummy2)
  18. }

In this code am trying to marshal the variable dummy of type struct but I am receiving some odd values in string and when I unmarshal that string I receive an empty struct.What will be the correct way to do this?

In this code am trying to marshal the variable dummy of type struct but I am receiving some odd values in string and when I unmarshal that string I receive an empty struct.What will be the correct way to do this?

答案1

得分: 0

  1. package main
  3. import (
  4. 	"encoding/json"
  5. 	"fmt"
  6. )
  8. type sample struct {
  9. 	Field []string `json:"field"`
  10. }
  12. func main() {
  13. 	dummy := sample{
  14. 		Field: []string{"color1", "color2"},
  15. 	}
  16. 	text, _ := json.Marshal(dummy)
  17. 	fmt.Println(string(text))
  19. 	var dummy2 sample
  20. 	json.Unmarshal(text, &dummy2)
  21. 	fmt.Println(dummy2)
  22. }

将字段的首字母大写以导出

输出：

  1. {"field":["color1","color2"]}
  2. {[color1 color2]}
英文: 
  1. package main
  3. import (
  4. 	"encoding/json"
  5. 	"fmt"
  6. )
  8. type sample struct {
  9. 	Field []string `json:"field"`
  10. }
  12. func main() {
  13. 	dummy := sample{
  14. 		Field: []string{"color1", "color2"},
  15. 	}
  16. 	text, _ := json.Marshal(dummy)
  17. 	fmt.Println(string(text))
  19. 	var dummy2 sample
  20. 	json.Unmarshal(text, &dummy2)
  21. 	fmt.Println(dummy2)
  22. }

Export fields using the first letter capital

Output:

  1. {"field":["color1","color2"]}
  2. {[color1 color2]}

huangapple
  • 本文由 发表于 2023年5月25日 12:21:56
  • 转载请务必保留本文链接：https://go.coder-hub.com/76328923.html
  • go
  • json
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