Use the ioutil.ReadDir function to read the file information list in the directory

Use the ioutil.ReadDir function to read the file information list in the directory

The directory is an organizational form of computer storage files. We often need to read the file information list in the directory. In Go language, you can use the ReadDir function in the ioutil package to implement this function. The ReadDir function returns a slice containing information about all files in the directory.

The following is a simple sample code that demonstrates how to use the ioutil.ReadDir function to read a list of file information in a directory:

package main

import (
    "fmt"
    "io/ioutil"
    "log"
)

func main() {
    dir := "./example" // 设置目录名称

    files, err := ioutil.ReadDir(dir) // 读取目录中的文件信息列表
    if err != nil {
        log.Fatal(err)
    }

    for _, file := range files {
        fmt.Println(file.Name()) // 输出文件名
    }
}

In the above code, a directory name is first specified "./example", and then call the ioutil.ReadDir function to read the file information list in the directory and save the results in slice files.

In the for loop, the files slice is traversed through the range keyword, and each iteration assigns an element in the slice to the file variable. In this example, we just print out the name of each file, but you can perform other operations on the files according to your needs, such as copying, moving, or deleting files.

It should be noted that the file information returned by the ioutil.ReadDir function includes attributes such as file name, file size, modification time, etc. If you need more detailed file information, such as file permissions, owners, etc., you can use the Stat function in the os package to obtain it.

Through the above code example, you can easily use the ioutil.ReadDir function to read the file information list in the directory and process it accordingly. Whether you are dealing with a small directory or a large directory with hundreds or thousands of files, the ioutil.ReadDir function can handle it easily. At the same time, using the directory operation functions of the Go language can make your code more concise and efficient.

I hope this article will be helpful to you, and I wish you good results when using the ioutil.ReadDir function!

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