In-depth understanding of Golang file operations: from creation to copying, master the basic operations of file reading and writing and the skills of efficiently processing large files

Abstract: In Golang, file operations are an integral part of daily development. This article will introduce how to use Golang to perform basic operations on file operations, including creating files, writing files, reading files and copying files. It also explores how to read and write files without opening them, and how to efficiently handle large files.

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learning target

This article is intended to help readers:

• - Understand the basics of file operations in Golang

• - Master the common methods of creating files, writing files, reading files and copying files

• - Understand how to read and write files without opening them

• - Learn efficient techniques and optimization methods when dealing with large files

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learning content output

Create a file

method one:

In Golang, the `os.Create()` function can be used to create a file. Here is sample code to create the file:

package main

import (
    "fmt"
    "os"
)

func main() {
    file, err := os.Create("example.txt")
    if err != nil {
        fmt.Println(err)
        return
    }
    defer file.Close()

    fmt.Println("文件创建成功。")
}

Method Two:

In Golang, we can use the Create function in the os package to create a file. The parameter of the Create function is a file name of string type, and the return value of the function is a pointer of type *File.

sample code ÿ