我如何打印(到控制台)的Id,标题,名称等,这个结构在Golang?

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

当前回答

不使用外部库,每个字段后加新行:

log.Println(
            strings.Replace(
                fmt.Sprintf("%#v", post), ", ", "\n", -1))

其他回答

还有go-render,它处理指针递归和字符串和int映射的大量键排序。

安装:

go get github.com/luci/go-render/render

例子:

type customType int
type testStruct struct {
        S string
        V *map[string]int
        I interface{}
}

a := testStruct{
        S: "hello",
        V: &map[string]int{"foo": 0, "bar": 1},
        I: customType(42),
}

fmt.Println("Render test:")
fmt.Printf("fmt.Printf:    %#v\n", a)))
fmt.Printf("render.Render: %s\n", Render(a))

打印:

fmt.Printf:    render.testStruct{S:"hello", V:(*map[string]int)(0x600dd065), I:42}
render.Render: render.testStruct{S:"hello", V:(*map[string]int){"bar":1, "foo":0}, I:render.customType(42)}

不使用外部库,每个字段后加新行:

log.Println(
            strings.Replace(
                fmt.Sprintf("%#v", post), ", ", "\n", -1))

我建议你使用fmt。Printf("%#v\n", s),它将打印golang类型在同一时间

package main

import (
    "fmt"
    "testing"
)

type student struct {
    id   int32
    name string
}

type Project struct {
    Id      int64   `json:"project_id"`
    Title   string  `json:"title"`
    Name    string  `json:"name"`
}

func TestPrint(t *testing.T) {
    s := Project{1, "title","jack"}
    fmt.Printf("%+v\n", s)
    fmt.Printf("%#v\n", s)
}

结果:

{Id:1 Title:title Name:jack}
main.Project{Id:1, Title:"title", Name:"jack"}

我建议使用json.Unmarshal() 我试着打印id,希望它有帮助:

var jsonString = `{"Id": 1, "Title": "the title", "Name": "the name","Data": "the data","Commits" : "the commits"}`
var jsonData = []byte(jsonString)

var data Project

var err = json.Unmarshal(jsonData, &data)
if err != nil {
    fmt.Println(err.Error())
    return
}

fmt.Println("Id :", data.Id)

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