基本介绍

​gutil​组件封装了一些开发中常用的工具方法。

使用方式：

import "github.com/gogf/gf/v2/util/gutil"

接口文档：

https://pkg.go.dev/github.com/gogf/gf/v2/util/gutil

常用方法

Dump

• 说明：​Dump​将​values​以更好的可读性的方式输出在标准输出中。
• 格式：

Dump(values ...interface{}) 

• 示例：

type User struct {
	Name string
	Age int
}

type Location struct {
	Province string
	City string
}

type UserInfo struct {
	U User
	L Location
}

func main() {
	userList := make([]UserInfo, 0)
	userList = append(userList, UserInfo{
		U: User{
			Name: "郭强",
			Age:  18,
		},
		L: Location{
			Province: "四川",
			City:     "成都",
		},
	})
	userList = append(userList, UserInfo{
		U: User{
			Name: "黄骞",
			Age:  18,
		},
		L: Location{
			Province: "江苏",
			City:     "南京",
		},
	})

	gutil.Dump(userList) 
}

// Output: 
[
    {
        U: {
            Name: "郭强",
            Age:  18,
        },
        L: {
            Province: "四川",
            City:     "成都",
        },
    },
    {
        U: {
            Name: "黄骞",
            Age:  18,
        },
        L: {
            Province: "江苏",
            City:     "南京",
        },
    },
]

DumpWithType

• 说明：​DumpWithType ​和 ​Dump ​类似，但是多了类型信息。
• 格式：

DumpWithType(values ...interface{})

• 示例：

type User struct {
	Name string
	Age int
}

type Location struct {
	Province string
	City string
}

type UserInfo struct {
	U User
	L Location
}

func main() {
	userList := make([]UserInfo, 0)
	userList = append(userList, UserInfo{
		U: User{
			Name: "郭强",
			Age:  18,
		},
		L: Location{
			Province: "四川",
			City:     "成都",
		},
	})
	userList = append(userList, UserInfo{
		U: User{
			Name: "黄骞",
			Age:  18,
		},
		L: Location{
			Province: "江苏",
			City:     "南京",
		},
	})
   
	gutil.DumpWithType(userList)
}

// Output: 
[]main.UserInfo(2) [
    main.UserInfo(2) {
        U: main.User(2) {
            Name: string(6) "郭强",
            Age:  int(18),
        },
        L: main.Location(2) {
            Province: string(6) "四川",
            City:     string(6) "成都",
        },
    },
    main.UserInfo(2) {
        U: main.User(2) {
            Name: string(6) "黄骞",
            Age:  int(18),
        },
        L: main.Location(2) {
            Province: string(6) "江苏",
            City:     string(6) "南京",
        },
    },
]

DumpTo

• 说明：​DumpTo​将​value​以自定义的输出形式写入到​write​中。
• 格式：

DumpTo(writer io.Writer, value interface{}, option DumpOption)

• 示例：

package main

import (
	"bytes"
	"fmt"
	"github.com/gogf/gf/v2/util/gutil"
	"io"
)

type UserInfo struct {
	Name     string
	Age      int
	Province string
	City     string
}

type DumpWriter struct {
	Content string
}

func (d *DumpWriter) Write(p []byte) (n int, err error) {
	buffer := bytes.NewBuffer(nil)
	buffer.WriteString("I'm Start!\n")
	buffer.WriteString(string(p))
	buffer.WriteString("\nI'm End!\n")

	d.Content = buffer.String()

	return buffer.Len(), nil
}

func main() {
	u := UserInfo{
		"a", 18, "b", "c",
	}

	var dw io.Writer = &DumpWriter{}

	gutil.DumpTo(dw, u, gutil.DumpOption{})

	fmt.Println(dw.(*DumpWriter).Content)
}

// Output:
I'm Start!
{
    Name:     "a",
    Age:      18,
    Province: "b",
    City:     "c",
}
I'm End!