Use the ioutil.ReadFile function to read the file content and return a string and a list of file information objects

Use the ioutil.ReadFile function to read the file content and return a string and file information object list

In the Go language, we can use the ioutil.ReadFile function to read the file content. This function returns a byte array of the file contents. This function is very convenient, but may have some performance issues, especially when the file is large. If we want to obtain file information (such as file name, size, modification time, etc.) at the same time, we can use the os.Stat function to obtain the file information object.

The following is a sample code that demonstrates how to use the ioutil.ReadFile function to read the file content and return a list containing file information objects:

package main

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

func main() {
    files, err := ioutil.ReadDir("/path/to/directory")
    if err != nil {
        log.Fatal(err)
    }

    for _, file := range files {
        if !file.IsDir() {
            fileContent, err := ioutil.ReadFile(file.Name())
            if err != nil {
                log.Fatal(err)
            }

            fmt.Printf("文件名：%s
", file.Name())
            fmt.Printf("文件大小：%d 字节
", file.Size())
            fmt.Printf("修改时间：%s
", file.ModTime().String())
            fmt.Printf("文件内容：%s
", string(fileContent))
            fmt.Println("--------------")
        }
    }
}

In the above code, we first use The ioutil.ReadDir function reads files and directories in the specified directory and returns a list of file information objects. Then, we traverse the file information object list, and for each non-directory file, we use the ioutil.ReadFile function to read the file content, and print the file information and content through the fmt.Printf function.

It should be noted that "/path/to/directory" in the above example code should be replaced with the specific directory path. In addition, some error handling code may need to be added to the code to handle possible errors.

By using the ioutil.ReadFile function, we can easily read the contents of the file; and by using the os.Stat function, we can obtain the file information at the same time. The combination of the two can help us better handle the needs of file reading and information acquisition. I hope the sample code in this article can be helpful to you.

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