- Created by 郭强, last modified on Dec 09, 2021
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基本介绍
gfile
文件管理组件提供了更加丰富的文件/目录操作能力。
使用方式:
import "github.com/gogf/gf/v2/os/gfile"
接口文档:
https://pkg.go.dev/github.com/gogf/gf/v2/os/gfile
内容管理
GetContents
- 说明:读取指定路径文件内容,以字符串形式返回。
示例:
func ExampleGetContents() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // It reads and returns the file content as string. // It returns empty string if it fails reading, for example, with permission or IO error. fmt.Println(gfile.GetContents(tempFile)) // Output: // goframe example content }
GetContentsWithCache
- 说明:带缓存获取文件内容,可设置缓存超时,文件发生变化自动清除缓存。
示例:
func ExampleGetContentsWithCache() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_cache") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // It reads the file content with cache duration of one minute, // which means it reads from cache after then without any IO operations within on minute. fmt.Println(gfile.GetContentsWithCache(tempFile, time.Minute)) // write new contents will clear its cache gfile.PutContents(tempFile, "new goframe example content") // There's some delay for cache clearing after file content change. time.Sleep(time.Second * 1) // read contents fmt.Println(gfile.GetContentsWithCache(tempFile)) // May Output: // goframe example content // new goframe example content }
GetBytes
- 说明:读取指定路径文件内容,以字节形式返回。
示例:
func ExampleGetBytes() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // It reads and returns the file content as []byte. // It returns nil if it fails reading, for example, with permission or IO error. fmt.Println(gfile.GetBytes(tempFile)) // Output: // [103 111 102 114 97 109 101 32 101 120 97 109 112 108 101 32 99 111 110 116 101 110 116] }
PutContents
- 说明:往指定路径文件添加字符串内容。如果文件不存在将会递归的形式自动创建。
示例:
func ExamplePutContents() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // It creates and puts content string into specifies file path. // It automatically creates directory recursively if it does not exist. gfile.PutContents(tempFile, "goframe example content") // read contents fmt.Println(gfile.GetContents(tempFile)) // Output: // goframe example content }
PutBytes
- 说明:以字节形式写入指定文件,如果文件不存在将会递归的形式自动创建
示例:
func ExamplePutBytes() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutBytes(tempFile, []byte("goframe example content")) // read contents fmt.Println(gfile.GetContents(tempFile)) // Output: // goframe example content }
PutContentsAppend
- 说明:追加字符串内容到指定文件,如果文件不存在将会递归的形式自动创建。
示例:
func ExamplePutContentsAppend() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // read contents fmt.Println(gfile.GetContents(tempFile)) // It creates and append content string into specifies file path. // It automatically creates directory recursively if it does not exist. gfile.PutContentsAppend(tempFile, " append content") // read contents fmt.Println(gfile.GetContents(tempFile)) // Output: // goframe example content // goframe example content append content }
PutBytesAppend
- 说明:追加字节内容到指定文件。如果文件不存在将会递归的形式自动创建。
示例:
func ExamplePutBytesAppend() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // read contents fmt.Println(gfile.GetContents(tempFile)) // write contents gfile.PutBytesAppend(tempFile, []byte(" append")) // read contents fmt.Println(gfile.GetContents(tempFile)) // Output: // goframe example content // goframe example content append }
GetNextCharOffsetByPath
- 说明:从某个偏移量开始,获取文件中指定字符所在下标
示例:
func ExampleGetNextCharOffsetByPath() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // read contents index := gfile.GetNextCharOffsetByPath(tempFile, 'f', 0) fmt.Println(index) // Output: // 2 }
GetBytesTilCharByPath
- 说明:以某个字符定位截取指定长度的文件内容以字节形式返回
示例:
func ExampleGetBytesTilCharByPath() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // read contents fmt.Println(gfile.GetBytesTilCharByPath(tempFile, 'f', 0)) // Output: // [103 111 102] 2 }
GetBytesByTwoOffsetsByPath
- 说明:用两个偏移量截取指定文件的内容以字节形式返回
示例:
func ExampleGetBytesByTwoOffsetsByPath() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // read contents fmt.Println(gfile.GetBytesByTwoOffsetsByPath(tempFile, 0, 7)) // Output: // [103 111 102 114 97 109 101] }
ReadLines
- 说明:以字符串形式逐行读取文件内容
示例:
func ExampleReadLines() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "L1 goframe example content\nL2 goframe example content") // read contents gfile.ReadLines(tempFile, func(text string) error { // Process each line fmt.Println(text) return nil }) // Output: // L1 goframe example content // L2 goframe example content }
ReadLinesBytes
- 说明:以字节形式逐行读取文件内容
示例:
func ExampleReadLinesBytes() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_content") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "L1 goframe example content\nL2 goframe example content") // read contents gfile.ReadLinesBytes(tempFile, func(bytes []byte) error { // Process each line fmt.Println(bytes) return nil }) // Output: // [76 49 32 103 111 102 114 97 109 101 32 101 120 97 109 112 108 101 32 99 111 110 116 101 110 116] // [76 50 32 103 111 102 114 97 109 101 32 101 120 97 109 112 108 101 32 99 111 110 116 101 110 116] }
内容替换
ReplaceFile
- 说明:替换指定文件的指定内容为新内容
示例:
func ExampleReplaceFile() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_replace") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // read contents fmt.Println(gfile.GetContents(tempFile)) // It replaces content directly by file path. gfile.ReplaceFile("content", "replace word", tempFile) fmt.Println(gfile.GetContents(tempFile)) // Output: // goframe example content // goframe example replace word }
ReplaceFileFunc
- 说明:使用自定义函数替换指定文件内容
示例:
func ExampleReplaceFileFunc() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_replace") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example 123") // read contents fmt.Println(gfile.GetContents(tempFile)) // It replaces content directly by file path and callback function. gfile.ReplaceFileFunc(func(path, content string) string { // Replace with regular match reg, _ := regexp.Compile(`\d{3}`) return reg.ReplaceAllString(content, "[num]") }, tempFile) fmt.Println(gfile.GetContents(tempFile)) // Output: // goframe example 123 // goframe example [num] }
ReplaceDir
- 说明:扫描指定目录,替换符合条件的文件的指定内容为新内容
示例:
func ExampleReplaceDir() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_replace") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // read contents fmt.Println(gfile.GetContents(tempFile)) // It replaces content of all files under specified directory recursively. gfile.ReplaceDir("content", "replace word", tempDir, "gflie_example.txt", true) // read contents fmt.Println(gfile.GetContents(tempFile)) // Output: // goframe example content // goframe example replace word }
ReplaceDirFunc
- 说明:扫描指定目录,使用自定义函数替换符合条件的文件的指定内容为新内容
示例:
func ExampleReplaceDirFunc() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_replace") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example 123") // read contents fmt.Println(gfile.GetContents(tempFile)) // It replaces content of all files under specified directory with custom callback function recursively. gfile.ReplaceDirFunc(func(path, content string) string { // Replace with regular match reg, _ := regexp.Compile(`\d{3}`) return reg.ReplaceAllString(content, "[num]") }, tempDir, "gflie_example.txt", true) fmt.Println(gfile.GetContents(tempFile)) // Output: // goframe example 123 // goframe example [num] }
文件时间
MTime
- 说明:获取路径修改时间
示例:
func ExampleMTime() { t := gfile.MTime(gfile.TempDir()) fmt.Println(t) // May Output: // 2021-11-02 15:18:43.901141 +0800 CST }
MTimestamp
- 说明:获取路径修改时间戳(秒)
示例:
func ExampleMTimestamp() { t := gfile.MTimestamp(gfile.TempDir()) fmt.Println(t) // May Output: // 1635838398 }
MTimestampMilli
- 说明:获取路径修改时间戳(毫秒)
示例:
func ExampleMTimestampMilli() { t := gfile.MTimestampMilli(gfile.TempDir()) fmt.Println(t) // May Output: // 1635838529330 }
文件大小
Size
- 说明:获取路径大小,不进行格式化
示例:
func ExampleSize() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_size") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "0123456789") fmt.Println(gfile.Size(tempFile)) // Output: // 10 }
SizeFormat
- 说明:获取路径大小,并格式化成硬盘容量
示例:
func ExampleSizeFormat() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_size") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "0123456789") fmt.Println(gfile.SizeFormat(tempFile)) // Output: // 10.00B }
ReadableSize
- 说明:获取给定路径容量大小,并格式化人类易读的硬盘容量格式
示例:
func ExampleReadableSize() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_size") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "01234567899876543210") fmt.Println(gfile.ReadableSize(tempFile)) // Output: // 20.00B }
StrToSize
- 说明:硬盘容量大小字符串转换为大小整形
示例:
func ExampleStrToSize() { size := gfile.StrToSize("100MB") fmt.Println(size) // Output: // 104857600 }
FormatSize
- 说明:大小整形转换为硬盘容量大小字符串`K、m、g、t、p、e、b`
示例:
func ExampleFormatSize() { sizeStr := gfile.FormatSize(104857600) fmt.Println(sizeStr) sizeStr0 := gfile.FormatSize(1024) fmt.Println(sizeStr0) sizeStr1 := gfile.FormatSize(999999999999999999) fmt.Println(sizeStr1) // Output: // 100.00M // 1.00K // 888.18P }
文件排序
SortFiles
- 说明:排序多个路径,按首字母进行排序,数字优先。
示例:
func ExampleSortFiles() { files := []string{ "/aaa/bbb/ccc.txt", "/aaa/bbb/", "/aaa/", "/aaa", "/aaa/ccc/ddd.txt", "/bbb", "/0123", "/ddd", "/ccc", } sortOut := gfile.SortFiles(files) fmt.Println(sortOut) // Output: // [/0123 /aaa /aaa/ /aaa/bbb/ /aaa/bbb/ccc.txt /aaa/ccc/ddd.txt /bbb /ccc /ddd] }
文件检索
Search
- 说明:在指定目录(默认包含当前目录、运行目录、主函数目录;不会递归子目录)中搜索文件并返回真实路径。
示例:
func ExampleSearch() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_search") tempFile = gfile.Join(tempDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") // search file realPath, _ := gfile.Search(fileName, tempDir) fmt.Println(gfile.Basename(realPath)) // Output: // gflie_example.txt }
目录扫描
ScanDir
- 说明:扫描指定目录,可扫描文件或目录,支持递归扫描。
示例:
func ExampleScanDir() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_scan_dir") tempFile = gfile.Join(tempDir, fileName) tempSubDir = gfile.Join(tempDir, "sub_dir") tempSubFile = gfile.Join(tempSubDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") gfile.PutContents(tempSubFile, "goframe example content") // scans directory recursively list, _ := gfile.ScanDir(tempDir, "*", true) for _, v := range list { fmt.Println(gfile.Basename(v)) } // Output: // gflie_example.txt // sub_dir // gflie_example.txt }
ScanDirFile
- 说明:扫描指定目录的文件,支持递归扫描
示例:
func ExampleScanDirFile() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_scan_dir_file") tempFile = gfile.Join(tempDir, fileName) tempSubDir = gfile.Join(tempDir, "sub_dir") tempSubFile = gfile.Join(tempSubDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") gfile.PutContents(tempSubFile, "goframe example content") // scans directory recursively exclusive of directories list, _ := gfile.ScanDirFile(tempDir, "*.txt", true) for _, v := range list { fmt.Println(gfile.Basename(v)) } // Output: // gflie_example.txt // gflie_example.txt }
ScanDirFunc
- 说明:扫描指定目录(自定义过滤方法),可扫描文件或目录,支持递归扫描
示例:
func ExampleScanDirFunc() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_scan_dir_func") tempFile = gfile.Join(tempDir, fileName) tempSubDir = gfile.Join(tempDir, "sub_dir") tempSubFile = gfile.Join(tempSubDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") gfile.PutContents(tempSubFile, "goframe example content") // scans directory recursively list, _ := gfile.ScanDirFunc(tempDir, "*", true, func(path string) string { // ignores some files if gfile.Basename(path) == "gflie_example.txt" { return "" } return path }) for _, v := range list { fmt.Println(gfile.Basename(v)) } // Output: // sub_dir }
ScanDirFileFunc
- 说明:扫描指定目录的文件(自定义过滤方法),支持递归扫描。
示例:
func ExampleScanDirFileFunc() { // init var ( fileName = "gflie_example.txt" tempDir = gfile.TempDir("gfile_example_scan_dir_file_func") tempFile = gfile.Join(tempDir, fileName) fileName1 = "gflie_example_ignores.txt" tempFile1 = gfile.Join(tempDir, fileName1) tempSubDir = gfile.Join(tempDir, "sub_dir") tempSubFile = gfile.Join(tempSubDir, fileName) ) // write contents gfile.PutContents(tempFile, "goframe example content") gfile.PutContents(tempFile1, "goframe example content") gfile.PutContents(tempSubFile, "goframe example content") // scans directory recursively exclusive of directories list, _ := gfile.ScanDirFileFunc(tempDir, "*.txt", true, func(path string) string { // ignores some files if gfile.Basename(path) == "gflie_example_ignores.txt" { return "" } return path }) for _, v := range list { fmt.Println(gfile.Basename(v)) } // Output: // gflie_example.txt // gflie_example.txt }
常用目录
Pwd
- 说明:获取当前工作路径。
示例:
func ExamplePwd() { // Get absolute path of current working directory. fmt.Println(gfile.Pwd()) // May Output: // xxx/gf/os/gfile }
Home
- 说明:获取运行用户的主目录
示例:
func ExampleHome() { // user's home directory homePath, _ := gfile.Home() fmt.Println(homePath) // May Output: // C:\Users\hailaz }
TempDir
说明:获取拼接系统临时路径后的绝对地址。
示例:
func ExampleTempDir() { // init var ( fileName = "gfile_example_basic_dir" ) // fetch an absolute representation of path. path := gfile.TempDir(fileName) fmt.Println(path) // Output: // /tmp/gfile_example_basic_dir }
SelfPath
说明:获取当前运行程序的绝对路径。
示例:
func ExampleSelfPath() { // Get absolute file path of current running process fmt.Println(gfile.SelfPath()) // May Output: // xxx/___github_com_gogf_gf_v2_os_gfile__ExampleSelfPath }
类型判断
IsDir
- 说明:检查给定的路径是否是文件夹。
示例:
func ExampleIsDir() { // init var ( path = gfile.TempDir("gfile_example_basic_dir") filePath = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") ) // Checks whether given `path` a directory. fmt.Println(gfile.IsDir(path)) fmt.Println(gfile.IsDir(filePath)) // Output: // true // false }
IsFile
- 说明:检查给定的路径是否是文件。
示例:
func ExampleIsFile() { // init var ( filePath = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") dirPath = gfile.TempDir("gfile_example_basic_dir") ) // Checks whether given `path` a file, which means it's not a directory. fmt.Println(gfile.IsFile(filePath)) fmt.Println(gfile.IsFile(dirPath)) // Output: // true // false }
权限操作
IsReadable
说明:检查给定的路径是否可读。
示例:
func ExampleIsReadable() { // init var ( path = gfile.Pwd() + gfile.Separator + "testdata/readline/file.log" ) // Checks whether given `path` is readable. fmt.Println(gfile.IsReadable(path)) // Output: // true }
IsWritable
Chmod
说明:使用指定的权限,更改指定路径的文件权限。
示例:
func ExampleChmod() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") ) // Get a FileInfo describing the named file. stat, err := gfile.Stat(path) if err != nil { fmt.Println(err.Error()) } // Show original mode fmt.Println(stat.Mode()) // Change file model gfile.Chmod(path, gfile.DefaultPermCopy) // Get a FileInfo describing the named file. stat, _ = gfile.Stat(path) // Show the modified mode fmt.Println(stat.Mode()) // Output: // -rw-r--r-- // -rwxrwxrwx }
文件/目录操作
Copy
- 说明:支持复制文件或目录
示例:
func ExampleCopy() { // init var ( srcFileName = "gflie_example.txt" srcTempDir = gfile.TempDir("gfile_example_copy_src") srcTempFile = gfile.Join(srcTempDir, srcFileName) // copy file dstFileName = "gflie_example_copy.txt" dstTempFile = gfile.Join(srcTempDir, dstFileName) // copy dir dstTempDir = gfile.TempDir("gfile_example_copy_dst") ) // write contents gfile.PutContents(srcTempFile, "goframe example copy") // copy file gfile.Copy(srcTempFile, dstTempFile) // read contents after copy file fmt.Println(gfile.GetContents(dstTempFile)) // copy dir gfile.Copy(srcTempDir, dstTempDir) // list copy dir file fList, _ := gfile.ScanDir(dstTempDir, "*", false) for _, v := range fList { fmt.Println(gfile.Basename(v)) } // Output: // goframe example copy // gflie_example.txt // gflie_example_copy.txt }
Mkdir
- 说明:创建文件夹,支持递归创建(建议采用绝对路径),创建后的文件夹权限为:
drwxr-xr-x
。 示例:
func ExampleMkdir() { // init var ( path = gfile.TempDir("gfile_example_basic_dir") ) // Creates directory gfile.Mkdir(path) // Check if directory exists fmt.Println(gfile.IsDir(path)) // Output: // true }
Create
- 说明:创建文件/文件夹,如果传入的路径中的文件夹不存在,则会自动创建文件夹以及文件,其中创建的文件权限为
-rw-r–r–
。 - 注意:如果需要创建文件的已存在,则会清空该文件的内容!
示例:
func ExampleCreate() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") dataByte = make([]byte, 50) ) // Check whether the file exists isFile := gfile.IsFile(path) fmt.Println(isFile) // Creates file with given `path` recursively fileHandle, _ := gfile.Create(path) defer fileHandle.Close() // Write some content to file n, _ := fileHandle.WriteString("hello goframe") // Check whether the file exists isFile = gfile.IsFile(path) fmt.Println(isFile) // Reset file uintptr unix.Seek(int(fileHandle.Fd()), 0, 0) // Reads len(b) bytes from the File fileHandle.Read(dataByte) fmt.Println(string(dataByte[:n])) // Output: // false // true // hello goframe }
Open
- 说明:以只读的方式打开文件/文件夹。
示例:
func ExampleOpen() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") dataByte = make([]byte, 4096) ) // Open file or directory with READONLY model file, _ := gfile.Open(path) defer file.Close() // Read data n, _ := file.Read(dataByte) fmt.Println(string(dataByte[:n])) // Output: // hello goframe }
OpenFile
- 说明:以指定`flag`以及`perm`的方式打开文件/文件夹。
示例:
func ExampleOpenFile() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") dataByte = make([]byte, 4096) ) // Opens file/directory with custom `flag` and `perm` // Create if file does not exist,it is created in a readable and writable mode,prem 0777 openFile, _ := gfile.OpenFile(path, os.O_CREATE|os.O_RDWR, gfile.DefaultPermCopy) defer openFile.Close() // Write some content to file writeLength, _ := openFile.WriteString("hello goframe test open file") fmt.Println(writeLength) // Read data unix.Seek(int(openFile.Fd()), 0, 0) n, _ := openFile.Read(dataByte) fmt.Println(string(dataByte[:n])) // Output: // 28 // hello goframe test open file }
OpenWithFalg
- 说明:以指定`flag`的方式打开文件/文件夹。
示例:
func ExampleOpenWithFlag() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") dataByte = make([]byte, 4096) ) // Opens file/directory with custom `flag` // Create if file does not exist,it is created in a readable and writable mode with default `perm` is 0666 openFile, _ := gfile.OpenWithFlag(path, os.O_CREATE|os.O_RDWR) defer openFile.Close() // Write some content to file writeLength, _ := openFile.WriteString("hello goframe test open file with flag") fmt.Println(writeLength) // Read data unix.Seek(int(openFile.Fd()), 0, 0) n, _ := openFile.Read(dataByte) fmt.Println(string(dataByte[:n])) // Output: // 38 // hello goframe test open file with flag }
OpenWithFalgPerm
- 说明:以指定`flag`以及`perm`的方式打开文件/文件夹。
示例:
func ExampleOpenWithFlagPerm() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") dataByte = make([]byte, 4096) ) // Opens file/directory with custom `flag` and `perm` // Create if file does not exist,it is created in a readable and writable mode with `perm` is 0777 openFile, _ := gfile.OpenWithFlagPerm(path, os.O_CREATE|os.O_RDWR, gfile.DefaultPermCopy) defer openFile.Close() // Write some content to file writeLength, _ := openFile.WriteString("hello goframe test open file with flag and perm") fmt.Println(writeLength) // Read data unix.Seek(int(openFile.Fd()), 0, 0) n, _ := openFile.Read(dataByte) fmt.Println(string(dataByte[:n])) // Output: // 38 // hello goframe test open file with flag }
Stat
- 说明:获取给定路径的文件详情。
示例:
func ExampleStat() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") ) // Get a FileInfo describing the named file. stat, _ := gfile.Stat(path) fmt.Println(stat.Name()) fmt.Println(stat.IsDir()) fmt.Println(stat.Mode()) fmt.Println(stat.ModTime()) fmt.Println(stat.Size()) fmt.Println(stat.Sys()) // May Output: // file1 // false // -rwxr-xr-x // 2021-12-02 11:01:27.261441694 +0800 CST // &{16777220 33261 1 8597857090 501 20 0 [0 0 0 0] {1638414088 192363490} {1638414087 261441694} {1638414087 261441694} {1638413480 485068275} 38 8 4096 0 0 0 [0 0]} }
Move
说明:将
src
重命名为dst
。- 注意:如果
dst
已经存在并且是文件,将会被替换造成数据丢失! 示例:
func ExampleMove() { // init var ( srcPath = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") dstPath = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file2") ) // Check is file fmt.Println(gfile.IsFile(dstPath)) // Moves `src` to `dst` path. // If `dst` already exists and is not a directory, it'll be replaced. gfile.Move(srcPath, dstPath) fmt.Println(gfile.IsFile(srcPath)) fmt.Println(gfile.IsFile(dstPath)) // Output: // false // false // true }
Rename
说明:
Move
的别名,将src
重命名为dst
。- 注意:如果
dst
已经存在并且是文件,将会被替换造成数据丢失! 示例:
func ExampleRename() { // init var ( srcPath = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file2") dstPath = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") ) // Check is file fmt.Println(gfile.IsFile(dstPath)) // renames (moves) `src` to `dst` path. // If `dst` already exists and is not a directory, it'll be replaced. gfile.Rename(srcPath, dstPath) fmt.Println(gfile.IsFile(srcPath)) fmt.Println(gfile.IsFile(dstPath)) // Output: // false // false // true }
Remove
说明:删除给定路径的文件或文件夹。
示例:
func ExampleRemove() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") ) // Checks whether given `path` a file, which means it's not a directory. fmt.Println(gfile.IsFile(path)) // deletes all file/directory with `path` parameter. gfile.Remove(path) // Check again fmt.Println(gfile.IsFile(path)) // Output: // true // false }
IsEmpty
说明:检查给定的路径,如果是文件夹则检查是否包含文件,如果是文件则检查文件大小是否为空。
示例:
func ExampleIsEmpty() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") ) // Check whether the `path` is empty fmt.Println(gfile.IsEmpty(path)) // Truncate file gfile.Truncate(path, 0) // Check whether the `path` is empty fmt.Println(gfile.IsEmpty(path)) // Output: // false // true }
DirNames
说明:获取给定路径下的文件列表,返回的是一个切片。
示例:
func ExampleDirNames() { // init var ( path = gfile.TempDir("gfile_example_basic_dir") ) // Get sub-file names of given directory `path`. dirNames, _ := gfile.DirNames(path) fmt.Println(dirNames) // May Output: // [file1] }
Glob
说明:模糊搜索给定路径下的文件列表,支持正则,第二个参数控制返回的结果是否带上绝对路径。
示例:
func ExampleGlob() { // init var ( path = gfile.Pwd() + gfile.Separator + "*_example_basic_test.go" ) // Get sub-file names of given directory `path`. // Only show file name matchNames, _ := gfile.Glob(path, true) fmt.Println(matchNames) // Show full path of the file matchNames, _ = gfile.Glob(path, false) fmt.Println(matchNames) // May Output: // [gfile_z_example_basic_test.go] // [xxx/gf/os/gfile/gfile_z_example_basic_test.go] }
Exists
- 说明:检查给定的路径是否存在 。
示例:
func ExampleExists() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") ) // Checks whether given `path` exist. fmt.Println(gfile.Exists(path)) // Output: // true }
Chdir
- 说明:使用给定的路径,更改当前的工作路径。
示例:
func ExampleChdir() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") ) // Get current working directory fmt.Println(gfile.Pwd()) // Changes the current working directory to the named directory. gfile.Chdir(path) // Get current working directory fmt.Println(gfile.Pwd()) // May Output: // xxx/gf/os/gfile // /tmp/gfile_example_basic_dir/file1 }
路径操作
Join
- 说明:将多个字符串路径通过`/`进行连接。
示例:
func ExampleJoin() { // init var ( dirPath = gfile.TempDir("gfile_example_basic_dir") filePath = "file1" ) // Joins string array paths with file separator of current system. joinString := gfile.Join(dirPath, filePath) fmt.Println(joinString) // Output: // /tmp/gfile_example_basic_dir/file1 }
Abs
说明:返回路径的绝对路径。
示例:
func ExampleAbs() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") ) // Get an absolute representation of path. fmt.Println(gfile.Abs(path)) // Output: // /tmp/gfile_example_basic_dir/file1 }
RealPath
说明:获取给定路径的绝对路径地址。
注意:如果文件不存在则返回空。
示例:
func ExampleRealPath() { // init var ( realPath = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") worryPath = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "worryFile") ) // fetch an absolute representation of path. fmt.Println(gfile.RealPath(realPath)) fmt.Println(gfile.RealPath(worryPath)) // Output: // /tmp/gfile_example_basic_dir/file1 // }
SelfName
说明:获取当前运行程序的名称。
示例:
func ExampleSelfName() { // Get file name of current running process fmt.Println(gfile.SelfName()) // May Output: // ___github_com_gogf_gf_v2_os_gfile__ExampleSelfName }
Basename
说明:获取给定路径中的最后一个元素,包含扩展名。
示例:
func ExampleBasename() { // init var ( path = gfile.Pwd() + gfile.Separator + "testdata/readline/file.log" ) // Get the last element of path, which contains file extension. fmt.Println(gfile.Basename(path)) // Output: // file.log }
Name
说明:获取给定路径中的最后一个元素,不包含扩展名。
示例:
func ExampleName() { // init var ( path = gfile.Pwd() + gfile.Separator + "testdata/readline/file.log" ) // Get the last element of path without file extension. fmt.Println(gfile.Name(path)) // Output: // file }
Dir
说明:获取给定路径的目录部分,排除最后的元素。
示例:
func ExampleDir() { // init var ( path = gfile.Join(gfile.TempDir("gfile_example_basic_dir"), "file1") ) // Get all but the last element of path, typically the path's directory. fmt.Println(gfile.Dir(path)) // Output: // /tmp/gfile_example_basic_dir }
Ext
说明:获取给定路径的扩展名,包含`.`。
示例:
func ExampleExt() { // init var ( path = gfile.Pwd() + gfile.Separator + "testdata/readline/file.log" ) // Get the file name extension used by path. fmt.Println(gfile.Ext(path)) // Output: // .log }
ExtName
说明:获取给定路径的扩展名,不包含`.`。
示例:
func ExampleExtName() { // init var ( path = gfile.Pwd() + gfile.Separator + "testdata/readline/file.log" ) // Get the file name extension used by path but the result does not contains symbol '.'. fmt.Println(gfile.ExtName(path)) // Output: // log }
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