如何在Go中从外部包访问结构 [英] How to access a struct from an external package in Go

问题描述

我正在尝试从以下文件中的另一个包中导入结构:

I'm trying to import a struct from another package in the following file:

// main.go
import "path/to/models/product"    
product = Product{Name: "Shoes"}

// models/product.go
type Product struct{
 Name string
}

但是在main.go文件中，结构Product是未定义的.如何导入该结构?

But in the main.go file the struct Product is undefined. How do I import the struct?

推荐答案

在Go中，您导入的是完整的" 包，而不是包中的函数或类型.
(有关更多详细信息，请参见此相关问题:在golang中C ++的"using"等效项是什么)

In Go you import "complete" packages, not functions or types from packages.
(See this related question for more details: What's C++'s `using` equivalent in golang)

有关import关键字的语法和更深入的说明，请参见规范:导入声明.进口报关单.

See Spec: Import declarations for syntax and deeper explanation of the import keyword and import declarations.

导入包后，可以使用引用其导出的标识符 ="https://golang.org/ref/spec#Qualified_identifiers" rel ="nofollow noreferrer">合格的标识符，其格式为:packageName.Identifier.

Once you import a package, you may refer to its exported identifiers with qualified identifiers which has the form: packageName.Identifier.

因此您的示例可能如下所示:

So your example could look like this:

import "path/to/models/product"
import "fmt"

func main() {
    p := product.Product{Name: "Shoes"}
    // Use product, e.g. print it:
    fmt.Println(p) // This requires `import "fmt"`
}

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