Go 中带有 JSON Marshal 的小写 JSON 键名 [英] Lowercase JSON key names with JSON Marshal in Go
问题描述
我希望使用 "encoding/json"
包来编组在我的应用程序的导入包之一中声明的结构.
I wish to use the "encoding/json"
package to marshal a struct declared in one of the imported packages of my application.
例如:
type T struct {
Foo int
}
因为是导入的,所以结构体中所有可用(导出)的字段都以大写字母开头.但我希望有小写的键名:
Because it is imported, all available (exported) fields in the struct begins with an upper case letter. But I wish to have lower case key names:
out, err := json.Marshal(&T{Foo: 42})
将导致
{"Foo":42}
但我想得到
{"foo":42}
是否有可能以某种简单的方式解决问题?
Is it possible to get around the problem in some easy way?
推荐答案
查看 编码/json.Marshal.它讨论了使用 struct 字段标记来确定生成的 json 的格式.
Have a look at the docs for encoding/json.Marshal. It discusses using struct field tags to determine how the generated json is formatted.
例如:
type T struct {
FieldA int `json:"field_a"`
FieldB string `json:"field_b,omitempty"`
}
这将生成如下 JSON:
This will generate JSON as follows:
{
"field_a": 1234,
"field_b": "foobar"
}
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