go语言path使用

func main() {
	//拼接路径
	p := filepath.Join("dir1", "dir2", "filename")
	fmt.Println("p:", p)  //p: dir1\dir2\filename

	fmt.Println(filepath.Join("dir1//", "filename"))   //dir1\filename
	fmt.Println(filepath.Join("dir1/../dir1", "filename"))  //dir1\filename

	fmt.Println("Dir(p):", filepath.Dir(p))  //Dir(p): dir1\dir2
	fmt.Println("Base(p):", filepath.Base(p))  //Base(p): filename
	//IsAbs返回路径是否是一个绝对路径
	fmt.Println(filepath.IsAbs("dir/file"))   //false
	fmt.Println(filepath.IsAbs("/dir/file"))  //false

	filename := "config.json"
	//Ext函数返回path文件扩展名
	ext := filepath.Ext(filename)
	fmt.Println("ext:",ext)  //ext: .json
    //返回去除filename可能的后缀ext的字符串
	fmt.Println(strings.TrimSuffix(filename, ext))  //config

	rel, err := filepath.Rel("a/b", "a/b/t/file")
	if err != nil {
		panic(err)
	}
	fmt.Println("rel1:",rel)  //rel1: t\file
	rel, err = filepath.Rel("a/b", "a/c/t/file")
	if err != nil {
		panic(err)
	}
	fmt.Println("rel2:",rel)  //rel2: ..\c\t\file
}