mirror of
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880 lines
16 KiB
Markdown
880 lines
16 KiB
Markdown
# Fileutil
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fileutil 包支持文件基本操作。
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<div STYLE="page-break-after: always;"></div>
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## 源码:
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- [https://github.com/duke-git/lancet/blob/main/fileutil/file.go](https://github.com/duke-git/lancet/blob/main/fileutil/file.go)
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<div STYLE="page-break-after: always;"></div>
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## 用法:
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```go
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import (
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"github.com/duke-git/lancet/v2/fileutil"
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)
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```
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<div STYLE="page-break-after: always;"></div>
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## 目录
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- [ClearFile](#ClearFile)
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- [CreateFile](#CreateFile)
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- [CreateDir](#CreateDir)
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- [CopyFile](#CopyFile)
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- [CurrentPath](#CurrentPath)
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- [FileMode](#FileMode)
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- [MiMeType](#MiMeType)
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- [IsExist](#IsExist)
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- [IsLink](#IsLink)
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- [IsDir](#IsDir)
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- [ListFileNames](#ListFileNames)
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- [RemoveFile](#RemoveFile)
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- [ReadFileToString](#ReadFileToString)
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- [ReadFileByLine](#ReadFileByLine)
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- [Zip](#Zip)
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- [ZipAppendEntry](#ZipAppendEntry)
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- [UnZip](#UnZip)
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- [IsZipFile](#IsZipFile)
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- [FileSize](#FileSize)
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- [MTime](#MTime)
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- [Sha](#Sha)
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- [ReadCsvFile](#ReadCsvFile)
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- [WriteCsvFile](#WriteCsvFile)
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- [WriteStringToFile](#WriteStringToFile)
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- [WriteBytesToFile](#WriteBytesToFile)
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- [ReadFile](#ReadFile)
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<div STYLE="page-break-after: always;"></div>
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## 文档
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### <span id="ClearFile">ClearFile</span>
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<p>清空文件内容</p>
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<b>函数签名:</b>
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```go
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func ClearFile(path string) error
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/NRZ0ZT-G94H)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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err := fileutil.ClearFile("./test.txt")
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if err != nil {
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fmt.Println(err)
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}
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}
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```
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### <span id="CreateFile">CreateFile</span>
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<p>创建文件，创建成功返回true, 否则返回false</p>
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<b>函数签名:</b>
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```go
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func CreateFile(path string) bool
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/lDt8PEsTNKI)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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isCreatedSucceed := fileutil.CreateFile("./test.txt")
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fmt.Println(isCreatedSucceed)
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}
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```
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### <span id="CreateDir">CreateDir</span>
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<p>使用绝对路径创建嵌套目录，例如/a/, /a/b</p>
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<b>函数签名:</b>
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```go
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func CreateDir(absPath string) error
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/qUuCe1OGQnM)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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err := fileutil.CreateDir("/a/b") // will create folder /a/b
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fmt.Println(err)
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}
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```
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### <span id="CopyFile">CopyFile</span>
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<p>拷贝文件，会覆盖原有的文件</p>
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<b>函数签名:</b>
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```go
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func CopyFile(srcPath string, dstPath string) error
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/Jg9AMJMLrJi)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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err := fileutil.CopyFile("./test.txt", "./test_copy.txt")
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if err != nil {
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fmt.Println(err)
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}
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}
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```
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### <span id="CurrentPath">CurrentPath</span>
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<p>返回当前位置的绝对路径。</p>
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<b>函数签名:</b>
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```go
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func CurrentPath() string
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/s74a9iBGcSw)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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absPath := CurrentPath()
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fmt.Println(absPath)
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}
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```
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### <span id="FileMode">FileMode</span>
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<p>获取文件mode信息</p>
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<b>函数签名:</b>
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```go
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func FileMode(path string) (fs.FileMode, error)
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/2l2hI42fA3p)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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mode, err := fileutil.FileMode("./test.txt")
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if err != nil {
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fmt.Println(err)
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}
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fmt.Println(mode)
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}
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```
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### <span id="MiMeType">MiMeType</span>
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<p>获取文件mime类型, 'file'参数的类型必须是string或者*os.File</p>
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<b>函数签名:</b>
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```go
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func MiMeType(file any) string
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/bd5sevSUZNu)</span></b>
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```go
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package main
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import (
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"fmt"
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"os"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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type1 := fileutil.MiMeType("./test.txt")
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fmt.Println(type1) //text/plain; charset=utf-8
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f, _ := os.Open("./file.go")
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type2 := fileutil.MiMeType(f)
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fmt.Println(type2) //text/plain; charset=utf-8
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}
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```
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### <span id="IsExist">IsExist</span>
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<p>判断文件或目录是否存在</p>
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<b>函数签名:</b>
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```go
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func IsExist(path string) bool
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/nKKXt8ZQbmh)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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fileutil.CreateFile("./test.txt")
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isFileExist := fileutil.IsExist("./test.txt")
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fmt.Println(isFileExist) //true
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}
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```
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### <span id="IsLink">IsLink</span>
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<p>判断文件是否是符号链接</p>
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<b>函数签名:</b>
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```go
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func IsLink(path string) bool
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/TL-b-Kzvf44)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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isLinkFile := fileutil.IsLink("./test.txt")
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fmt.Println(isLinkFile) //false
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}
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```
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### <span id="IsDir">IsDir</span>
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<p>判断参数是否是目录</p>
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<b>函数签名:</b>
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```go
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func IsDir(path string) bool
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/WkVwEKqtOWk)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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isDir := fileutil.IsDir("./")
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fmt.Println(isDir) //true
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isDir = fileutil.IsDir("./test.txt")
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fmt.Println(isDir) //false
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}
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```
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### <span id="ListFileNames">ListFileNames</span>
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<p>返回目录下所有文件名</p>
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<b>函数签名:</b>
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```go
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func ListFileNames(path string) ([]string, error)
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/Tjd7Y07rejl)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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fileNames, _ := fileutil.ListFileNames("./")
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fmt.Println(fileNames)
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}
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```
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### <span id="RemoveFile">RemoveFile</span>
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<p>删除文件</p>
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<b>函数签名:</b>
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```go
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func RemoveFile(path string) error
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/P2y0XW8a1SH)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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err := fileutil.RemoveFile("./test.txt")
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if err != nil {
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fmt.Println(err)
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}
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}
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```
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### <span id="ReadFileToString">ReadFileToString</span>
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<p>读取文件内容并返回字符串</p>
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<b>函数签名:</b>
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```go
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func ReadFileToString(path string) (string, error)
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/cmfwp_5SQTp)</span></b>
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```go
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package main
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import (
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"fmt"
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"os"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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path := "./test.txt"
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fileutil.CreateFile(path)
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f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
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f.WriteString("hello world")
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content, _ := fileutil.ReadFileToString(path)
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fmt.Println(content) //hello world
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}
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```
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### <span id="ReadFileByLine">ReadFileByLine</span>
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<p>按行读取文件内容，返回字符串切片包含每一行</p>
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<b>函数签名:</b>
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```go
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func ReadFileByLine(path string)([]string, error)
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/svJP_7ZrBrD)</span></b>
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```go
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package main
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import (
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"fmt"
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"os"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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path := "./text.txt"
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fileutil.CreateFile(path)
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f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
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defer f.Close()
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f.WriteString("hello\nworld")
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contents, _ := fileutil.ReadFileByLine(path)
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fmt.Println(contents) //[]string{"hello", "world"}
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}
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```
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### <span id="Zip">Zip</span>
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<p>zip压缩文件, fpath参数可以是文件或目录</p>
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<b>函数签名:</b>
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```go
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func Zip(fpath string, destPath string) error
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/j-3sWBp8ik_P)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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err := fileutil.Zip("./test.txt", "./test.zip")
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if err != nil {
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fmt.Println(err)
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}
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}
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```
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### <span id="ZipAppendEntry">ZipAppendEntry</span>
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<p>通过将单个文件或目录追加到现有的zip文件</p>
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<b>函数签名:</b>
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```go
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func ZipAppendEntry(fpath string, destPath string) error
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/cxvaT8TRNQp)</span></b>
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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err := fileutil.ZipAppendEntry("./test.txt", "./test.zip")
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if err != nil {
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fmt.Println(err)
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}
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}
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```
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### <span id="UnZip">UnZip</span>
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<p>zip解压缩文件并保存在目录中</p>
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<b>函数签名:</b>
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```go
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func UnZip(zipFile string, destPath string) error
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/g0w34kS7B8m)</span></b>
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|
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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err := fileutil.Zip("./test.zip", "./unzip/test.txt")
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if err != nil {
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fmt.Println(err)
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}
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}
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```
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### <span id="IsZipFile">IsZipFile</span>
|
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<p>判断文件是否是zip压缩文件。</p>
|
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|
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<b>函数签名:</b>
|
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|
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```go
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func IsZipFile(filepath string) bool
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```
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<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/9M0g2j_uF_e)</span></b>
|
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|
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```go
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package main
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import (
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"fmt"
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"github.com/duke-git/lancet/v2/fileutil"
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)
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func main() {
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isZip := fileutil.IsZipFile("./zipfile.zip")
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fmt.Println(isZip)
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}
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```
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### <span id="FileSize">FileSize</span>
|
||
|
||
<p>返回文件字节大小。</p>
|
||
|
||
<b>函数签名:</b>
|
||
|
||
```go
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func FileSize(path string) (int64, error)
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```
|
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|
||
<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/H9Z05uD-Jjc)</span></b>
|
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|
||
```go
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package main
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||
|
||
import (
|
||
"fmt"
|
||
"github.com/duke-git/lancet/v2/fileutil"
|
||
)
|
||
|
||
func main() {
|
||
size, err := fileutil.FileSize("./testdata/test.txt")
|
||
|
||
fmt.Println(size)
|
||
fmt.Println(err)
|
||
|
||
// Output:
|
||
// 20
|
||
// <nil>
|
||
}
|
||
```
|
||
|
||
### <span id="MTime">MTime</span>
|
||
|
||
<p>返回文件修改时间(unix timestamp).</p>
|
||
|
||
<b>函数签名:</b>
|
||
|
||
```go
|
||
func MTime(filepath string) (int64, error)
|
||
```
|
||
|
||
<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/s_Tl7lZoAaY)</span></b>
|
||
|
||
```go
|
||
package main
|
||
|
||
import (
|
||
"fmt"
|
||
"github.com/duke-git/lancet/v2/fileutil"
|
||
)
|
||
|
||
func main() {
|
||
mtime, err := fileutil.MTime("./testdata/test.txt")
|
||
|
||
fmt.Println(mtime)
|
||
fmt.Println(err)
|
||
|
||
// Output:
|
||
// 1682391110
|
||
// <nil>
|
||
}
|
||
```
|
||
|
||
### <span id="Sha">Sha</span>
|
||
|
||
<p>返回文件sha值，参数`shaType` 应传值为: 1, 256，512.</p>
|
||
|
||
<b>函数签名:</b>
|
||
|
||
```go
|
||
func Sha(filepath string, shaType ...int) (string, error)
|
||
```
|
||
|
||
<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/VfEEcO2MJYf)</span></b>
|
||
|
||
```go
|
||
package main
|
||
|
||
import (
|
||
"fmt"
|
||
"github.com/duke-git/lancet/v2/fileutil"
|
||
)
|
||
|
||
func main() {
|
||
sha1, err := fileutil.Sha("./testdata/test.txt", 1)
|
||
sha256, _ := fileutil.Sha("./testdata/test.txt", 256)
|
||
sha512, _ := fileutil.Sha("./testdata/test.txt", 512)
|
||
|
||
fmt.Println(sha1)
|
||
fmt.Println(sha256)
|
||
fmt.Println(sha512)
|
||
fmt.Println(err)
|
||
|
||
// Output:
|
||
// dda3cf10c5a6ff6c6659a497bf7261b287af2bc7
|
||
// aa6d0a3fbc3442c228d606da09e0c1dc98c69a1cac3da1909199e0266171df35
|
||
// d22aba2a1b7a2e2f512756255cc1c3708905646920cb1eb95e45b531ba74774dbbb89baebf1f716220eb9cf4908f1cfc5b2a01267704d9a59f59d77cab609870
|
||
// <nil>
|
||
}
|
||
```
|
||
|
||
### <span id="ReadCsvFile">ReadCsvFile</span>
|
||
|
||
<p>读取csv文件内容到切片</p>
|
||
|
||
<b>函数签名:</b>
|
||
|
||
```go
|
||
func ReadCsvFile(filepath string) ([][]string, error)
|
||
```
|
||
|
||
<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/OExTkhGEd3_u)</span></b>
|
||
|
||
```go
|
||
package main
|
||
|
||
import (
|
||
"fmt"
|
||
"github.com/duke-git/lancet/v2/fileutil"
|
||
)
|
||
|
||
func main() {
|
||
content, err := fileutil.ReadCsvFile("./testdata/test.csv")
|
||
|
||
fmt.Println(content)
|
||
fmt.Println(err)
|
||
|
||
// Output:
|
||
// [[Bob 12 male] [Duke 14 male] [Lucy 16 female]]
|
||
// <nil>
|
||
}
|
||
```
|
||
|
||
### <span id="WriteCsvFile">WriteCsvFile</span>
|
||
|
||
<p>向csv文件写入内容。</p>
|
||
|
||
<b>函数签名:</b>
|
||
|
||
```go
|
||
func WriteCsvFile(filepath string, records [][]string, append bool) error
|
||
```
|
||
|
||
<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/dAXm58Q5U1o)</span></b>
|
||
|
||
```go
|
||
package main
|
||
|
||
import (
|
||
"fmt"
|
||
"github.com/duke-git/lancet/v2/fileutil"
|
||
)
|
||
|
||
func main() {
|
||
fpath := "./test.csv"
|
||
fileutil.CreateFile(fpath)
|
||
|
||
f, _ := os.OpenFile(fpath, os.O_WRONLY|os.O_TRUNC, 0777)
|
||
defer f.Close()
|
||
|
||
data := [][]string{
|
||
{"Lili", "22", "female"},
|
||
{"Jim", "21", "male"},
|
||
}
|
||
err := fileutil.WriteCsvFile(fpath, data, false)
|
||
|
||
if err != nil {
|
||
return
|
||
}
|
||
|
||
content, err := fileutil.ReadCsvFile(fpath)
|
||
|
||
if err != nil {
|
||
return
|
||
}
|
||
fmt.Println(content)
|
||
|
||
// Output:
|
||
// [[Lili 22 female] [Jim 21 male]]
|
||
}
|
||
```
|
||
|
||
### <span id="WriteBytesToFile">WriteBytesToFile</span>
|
||
|
||
<p>将bytes写入文件。</p>
|
||
|
||
<b>函数签名:</b>
|
||
|
||
```go
|
||
func WriteBytesToFile(filepath string, content []byte) error
|
||
```
|
||
|
||
<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/s7QlDxMj3P8)</span></b>
|
||
|
||
```go
|
||
package main
|
||
|
||
import (
|
||
"fmt"
|
||
"github.com/duke-git/lancet/v2/fileutil"
|
||
)
|
||
|
||
func main() {
|
||
filepath := "./bytes.txt"
|
||
|
||
file, err := os.Create(filepath)
|
||
if err != nil {
|
||
return
|
||
}
|
||
|
||
defer file.Close()
|
||
|
||
err = fileutil.WriteBytesToFile(filepath, []byte("hello"))
|
||
if err != nil {
|
||
return
|
||
}
|
||
|
||
content, err := fileutil.ReadFileToString(filepath)
|
||
if err != nil {
|
||
return
|
||
}
|
||
|
||
os.Remove(filepath)
|
||
|
||
fmt.Println(content)
|
||
|
||
// Output:
|
||
// hello
|
||
}
|
||
```
|
||
|
||
### <span id="WriteStringToFile">WriteStringToFile</span>
|
||
|
||
<p>将字符串写入文件。</p>
|
||
|
||
<b>函数签名:</b>
|
||
|
||
```go
|
||
func WriteStringToFile(filepath string, content string, append bool) error
|
||
```
|
||
|
||
<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/GhLS6d8lH_g)</span></b>
|
||
|
||
```go
|
||
package main
|
||
|
||
import (
|
||
"fmt"
|
||
"github.com/duke-git/lancet/v2/fileutil"
|
||
)
|
||
|
||
func main() {
|
||
filepath := "./test.txt"
|
||
|
||
file, err := os.Create(filepath)
|
||
if err != nil {
|
||
return
|
||
}
|
||
|
||
defer file.Close()
|
||
|
||
err = fileutil.WriteStringToFile(filepath, "hello", true)
|
||
if err != nil {
|
||
return
|
||
}
|
||
|
||
content, err := fileutil.ReadFileToString(filepath)
|
||
if err != nil {
|
||
return
|
||
}
|
||
|
||
os.Remove(filepath)
|
||
|
||
fmt.Println(content)
|
||
|
||
// Output:
|
||
// hello
|
||
}
|
||
```
|
||
|
||
### <span id="ReadFile">ReadFile</span>
|
||
|
||
<p>读取文件或者URL</p>
|
||
|
||
<b>函数签名:</b>
|
||
|
||
```go
|
||
func ReadFile(path string) (reader io.ReadCloser, closeFn func(), err error)
|
||
```
|
||
|
||
<b>示例:<span style="float:right;display:inline-block;"></span></b>
|
||
|
||
```go
|
||
package main
|
||
|
||
import (
|
||
"fmt"
|
||
"github.com/duke-git/lancet/v2/fileutil"
|
||
)
|
||
|
||
func main() {
|
||
reader, fn, err := ReadFile("https://httpbin.org/robots.txt")
|
||
if err != nil {
|
||
return
|
||
}
|
||
defer fn()
|
||
|
||
dat, err := io.ReadAll(reader)
|
||
if err != nil {
|
||
return
|
||
}
|
||
fmt.Println(string(dat))
|
||
// Output:
|
||
// User-agent: *
|
||
// Disallow: /deny
|
||
}
|
||
``` |