GO语言常用标准库02---os包

package main

import (
	"fmt"
	"os"
)

func main() {

	//获得当前工作路径（当前工程根目录）
	dir, err := os.Getwd()
	fmt.Println(dir,err)

	//获得任意环境变量
	pathValue := os.Getenv("Path")
	//pathValue := os.Getenv("shit")//空字符串
	fmt.Println(pathValue)

	//获得全部环境变量
	environ := os.Environ()
	fmt.Println(environ)

	//打印当前设备在网络中的主机名
	name, err := os.Hostname()
	fmt.Println(name,err)

	//获取当前用户的临时文件夹位置
	temporaryDirectory := os.TempDir()
	fmt.Println("劳资的临时文件夹是",temporaryDirectory)

	//在windows下，顺斜线“/”和反斜线“\”都是合法的路径分隔符，而在Linux下只认“/”
	fmt.Println(os.IsPathSeparator(‘/‘))
	fmt.Println(os.IsPathSeparator(‘\\‘))

	fileInfo, err := os.Stat("F:/BlockChain/code/W2/day2/新建文本文档.txt")
	fmt.Println(fileInfo,err)
	fmt.Println(fileInfo.IsDir())//false 该文件不是文件夹
	fmt.Println(fileInfo.Name())//新建文本文档 (2).txt
	fmt.Println(fileInfo.Size())//6 内容大小是6字节
	fmt.Println(fileInfo.Mode())//-rw-rw-rw- 文件主人-主人同组用户-其他人的访问权限
	fmt.Println(fileInfo.ModTime())//2018-12-25 08:53:58.54 +0800 CST 文件最后修改时间

}

F:\BlockChain\code <nil>
C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;D:\python3.5\python.exe;D:\python3.5\;D:\Git\cmd;D:\go\bin;;%GOPATH%\bin;D:\go\bin
[=::=::\ ALLUSERSPROFILE=C:\ProgramData APPDATA=C:\Users\Administrator\AppData\Roaming asl.log=Destination=file CommonProgramFiles=C:\Program Files\Common Files CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files CommonProgramW6432=C:\Program Files\Common Files COMPUTERNAME=PC-20140101MYSM ComSpec=C:\Windows\system32\cmd.exe FP_NO_HOST_CHECK=NO GOPATH=F:\BlockChain\code\W1\day4\ourmath;D:\go GOROOT=D:\Go HOMEDRIVE=C: HOMEPATH=\Users\Administrator LOCALAPPDATA=C:\Users\Administrator\AppData\Local LOGONSERVER=\\PC-20140101MYSM NUMBER_OF_PROCESSORS=8 OS=Windows_NT Path=C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;D:\python3.5\python.exe;D:\python3.5\;D:\Git\cmd;D:\go\bin;;%GOPATH%\bin;D:\go\bin PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC PROCESSOR_ARCHITECTURE=AMD64 PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 94 Stepping 3, GenuineIntel PROCESSOR_LEVEL=6 PROCESSOR_REVISION=5e03 ProgramData=C:\ProgramData ProgramFiles=C:\Program Files ProgramFiles(x86)=C:\Program Files (x86) ProgramW6432=C:\Program Files PSModulePath=C:\Windows\system32\WindowsPowerShell\v1.0\Modules\ PUBLIC=C:\Users\Public SESSIONNAME=Console SystemDrive=C: SystemRoot=C:\Windows TEMP=C:\Users\ADMINI~1\AppData\Local\Temp TMP=C:\Users\ADMINI~1\AppData\Local\Temp USERDOMAIN=PC-20140101MYSM USERNAME=Administrator USERPROFILE=C:\Users\Administrator windir=C:\Windows windows_tracing_flags=3 windows_tracing_logfile=C:\BVTBin\Tests\installpackage\csilogfile.log _DFX_INSTALL_UNSIGNED_DRIVER=1]
PC-20140101MYSM <nil>
劳资的临时文件夹是 C:\Users\ADMINI~1\AppData\Local\Temp
true
true
&{新建文本文档.txt 32 {108929552 30775863} {108929552 30775863} {108929552 30775863} 0 0 0 0 {0 0} F:/BlockChain/code/W2/day2/新建文本文档.txt 0 0 0 false} <nil>
false
新建文本文档.txt
0
-rw-rw-rw-
2019-11-13 23:28:40.0106 +0800 CST