directory exists

When uploading a file, you often need to determine whether the folder exists. If yes, upload the file. Otherwise, create a folder and upload the file.This is probably the syntax. String dir = "d: xxxyyy" If (system. io. directory. exists (dir ))

The following is an example code that checks whether a file exists: Copy the code code as follows: $filename = '/path/to/foo.txt '; if (file_exists ($filename)) { echo "The file $filename exists"; } else { echo "The file $filename does not exist"; }

The following is an example code that checks whether a file exists: Copy CodeThe code is as follows: $filename = '/path/to/foo.txt '; if (file_exists ($filename)) { echo "The file $filename exists"; } else { echo "The file $filename does not exist"

$filename = '/path/to/foo.txt '; if (file_exists ($filename)) { echo "The file $filename exists"; } else { echo "The file $filename does not exist"; } ?> Copy CodeIf the file is present, the

A simple way to determine whether a file or directory exists 1.c++ in C + +: #include #include using namespace Std;#define FILENAME "Stat.dat"int main (){FStream _file;_file.open (filename,ios::in);if (!_file){cout}Else{cout}return 0;}2. Ways to use

The following is a simple instance code that checks whether a file exists: Copy Code code as follows: $filename = '/path/to/foo.txt '; if (file_exists ($filename)) { echo "The file $filename exists"; } else { echo "The file

1.c++ is an easy way to do this: Copy Code code as follows: #include #include using namespace Std; #define FILENAME "Stat.dat" int main () { FStream _file; _file.open (filename,ios::in); if (!_file) { cout}

The following is a simple instance code that checks whether a file exists: The code is as follows Copy Code $filename = '/path/to/foo.txt ';if (file_exists ($filename)) {echo "The file $filename exists";} else {echo "The

http://blog.csdn.net/roger_77/article/details/1538447/A simple way to determine whether a file or directory exists 1.c++ in C + +: #include #include using namespace Std;#define FILENAME "Stat.dat"int main (){FStream _file;_file.open

1, Case: Copy CodeThe code is as follows: $file = ' jb51.net.php '; if (is_readable ($file) = = False) { Die (' file does not exist or cannot be read '); } else { echo ' presence '; } ?> The is_readable () function determines whether the

Let's take a look at the usage of file_exists.The file_exists () function checks whether a file or directory exists.If the specified file or directory exists, true is returned; otherwise, false is returned.SyntaxFile_exists (path) parameter

Shell Determines whether a file exists1. Shell to determine the file, whether the directory exists or has permissions2. #!/bin/sh3.4. Mypath= "/var/log/httpd/"5. Myfile= "/var/log/httpd/access.log"6.7. # the-x parameter here determines whether the

From: 1538447/1.c++ a very simple way: #include #include using namespace Std;#define FILENAME "Stat.dat"int main (){FStream _file;_file.open (filename,ios::in);if (!_file){cout}Else{cout}return 0;}2. Ways to use the C-language library:Name of

Hadoop provides scripts to verify whether the file directory exists: -bash-3.2$ hadoop fs -help...-test -[defsz] :Answer various questions about , with result via exit status. -d return 0 if is a directory. -e return 0 if exists. -f return 0

-(BOOL) Fileexistsatpath: (NSString *) path isdirectory: (BOOL *) isdirectoryIn general, the iOS system determines whether a file or directory exists, you can use the above API.The second parameter, Isdirectory, is an outgoing parameter that returns

$file = ' jbxue.com.php '; if (is_readable ($file) = = False) { Die (' file does not exist or cannot be read '); } else { echo ' presence '; } ?> Copy CodeThe is_readable () function determines

How the ASP detects if a directory exists, does not exist, and creates it itselfFolder=server.mappath ("/imagess")Set fso = CreateObject ("Scripting.FileSystemObject")If Fso.fileexists (Server.MapPath (filepath)) thenRespnse.write ("Everything is

#!/bin/bashif [ -e $1 ]        then                 echo  "Directory exists"          else        {                          echo  "Directory does not exist, whether create 1 is 2 No"                          read -p  " Please enter 1 or 2: " mulu   

The shell determines whether the file exists in 1. The shell determines whether the file, directory exists, or has permissions2. #!/bin/sh3.4. Mypath= "/var/log/httpd/"5. myfile= "/var/log/httpd/access.log"6.7. # the-x parameter here determines

EG1:If Os.path.isdir (' E:\test '):PassElseOs.mkdir (' E:\test ')# #os. mkdir () Only one directory is created and cannot be created CascadeEG2:If not os.path.exists (' E:\test '): # # #判断文件是否存在, returns a Boolean valueOs.makedirs (' E:\test ')# #os.