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!