一个简单的问题有很多答案。我还不如参加竞选呢。

package main

import "fmt"

type Project struct {
    Id    int64  `json:"project_id"`
    Title string `json:"title"`
    Name  string `json:"name"`
    //Data    Data    `json:"data"`
    //Commits Commits `json:"commits"`
}

var (
    Testy Project
)

func dump_project(foo Project) {
    fmt.Println("== Dump Project Struct ====")
    fmt.Printf("Id: %d\n", foo.Id)
    fmt.Println("Title: ", foo.Title)
    fmt.Printf("Name: %v\n", foo.Name)
}

func main() {
    fmt.Println("hello from go")
    Testy.Id = 3
    Testy.Title = "yo"
    Testy.Name = "my name"
    fmt.Println(Testy)
    dump_project(Testy)
}

输出的各种打印方法

hello from go
{3 yo my name}
== Dump Project Struct ====
Id: 3
Title:  yo
Name: my name

有时，将结构体打印为有效的Go代码(相当于Go /ast代码)可能会很方便。出于这个目的，https://github.com/hexops/valast做得很好:

package main

import (
    "fmt"

    "github.com/hexops/valast"
)

type ProjectData struct {
    Title   string `json:"title"`
    Name    string `json:"name"`
    Data    string `json:"data"`
    Commits string `json:"commits"`
}

type Project struct {
    Id   int64        `json:"project_id"`
    Data *ProjectData `json:"data"`
}

func main() {
    p := Project{
        Id: 1,
        Data: &ProjectData{
            Title:   "Test",
            Name:    "Mihai",
            Data:    "Some data",
            Commits: "Test Message",
        },
    }
    fmt.Println(valast.String(p))
}

输出:

go run main.go 
Project{Id: 1, Data: &ProjectData{
        Title:   "Test",
        Name:    "Mihai",
        Data:    "Some data",
        Commits: "Test Message",
}}

这些包中的大多数都依赖于reflect包来实现这些功能。

fmt.Sprintf()正在使用-> func (p *pp) printArg(参数接口{}，动词符文)的标准库

转到第638行-> https://golang.org/src/fmt/print.go

反射:

https://golang.org/pkg/reflect/

示例代码:

https://github.com/donutloop/toolkit/blob/master/debugutil/prettysprint.go

使用包fmt输出非常方便:

fmt.Printf("%+v \n", yourProject)

如果你想看到完整的sturct类型，你可以使用# replace +:

fmt.Printf("%#v \n", yourProject) 

    type Response struct {
        UserId int    `json:"userId"`
        Id     int    `json:"id"`
        Title  string `json:"title"`
        Body   string `json:"body"`
    }

    func PostsGet() gin.HandlerFunc {
        return func(c *gin.Context) {
            xs, err := http.Get("https://jsonplaceholder.typicode.com/posts")
            if err != nil {
                log.Println("The HTTP request failed with error: ", err)
            }
            data, _ := ioutil.ReadAll(xs`enter code here`.Body)


            // this will print the struct in console            
            fmt.Println(string(data))


            // this is to send as response for the API
            bytes := []byte(string(data))
            var res []Response
            json.Unmarshal(bytes, &res)

            c.JSON(http.StatusOK, res)
        }
    }

fmt.Printf("%+v\n", project)

这是打印细节的基本方法