Saving a file in non-existent path in Java-CodePudding

I am creating a simple client/server application that lets the server receive a file from the client. In this application, the client could also decide where to store the file in the server's file system, if it is inside a given base path.

The problem is that if the client sends a path, the server creates, ie, this string as path : C:\basePath\newFolder\file.xml. If the newFolder does not exsist in the current file system, it throws this error:

Error: C:\remtServer\prova\t.xml (Access denied)

And also these two errors, but I think they are irrelevant, because they derive from the first one:

[Fatal Error] :1:8: XML document structures must start and end within the same entity.

Error: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 8; XML document structures must start and end within the same entity.

I am not very experienced in Java, so maybe it is a trivial matter, but I can't figure out.

This is the code in the server:

public static void receive(String token, String fileName, String filePath, int length) throws IOException{

        // Stream for binary data and file transfer
        OutputStream out = new FileOutputStream(basePath   filePath   fileName);
        InputStream in = socket.getInputStream();

        // Variables 
        int bytesRead;

        // Bytes for store info to be sent
        byte[] buffer = new byte[length];

        //-------------------------
        // Send file 
        //------------------------- 

        while((bytesRead = in.read(buffer)) > 0){
            out.write(buffer, 0, bytesRead);

            if (bytesRead < 1024) {
                break;
            }

        } // while

        //-------------------------
        // End of file transfer
        //-------------------------
        

        out.close();
    } // receive

The error occurs because the directory does not exist. How can I create the directory to fix that? Otherwise, how can I solve that?

CodePudding user response：

On the server side, the following code with make all the directories (assuming that the Java running on the server side has the necessary file permissions)

File f = ...; // The file path the client has submitted
File dir = null;
if (f.isFile()) {
  dir = f.getParentFile();
} else dir = f;
dir.mkdirs();