Question

I need to copy a directory form one source form multiple destination. For example, i copied a file from my C: drive and paste it into many external drives like E:,F:,G:…etc. For this process i used the following code,

set src=%~1

:Loop
    shift
    set dest=%~1
    if "%dest%"=="" goto :EOF
    xcopy "%src%" "%dest%" /E
goto Loop

i saved this code snippet as .bat in system32 folder. Then i use this command as

C:\Windows\System32>mcopy C:\Users\FSSD\Desktop\Screenshot E: F:

i executed this command in my command prompt it executed successfully.

Then i tried to implement this command in my java application.

My java code is,

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class MultipleCopy{

    public static void main(String args[]) {

        String exe_Cmd = "c:/Windows/System32/mcopy C:/Users/FSSD/Desktop/Screenshot E: F:";
        Runtime r = Runtime.getRuntime();
        ProcessBuilder p = new ProcessBuilder(new String[] { "cmd.exe", "/C",
                exe_Cmd });
        Process pro;
        try {
            pro = p.start();
            InputStream is = pro.getInputStream();
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String line;
            while ((line = br.readLine()) != null) {
                System.out.println(line);
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            System.err.println("IO Exception" + e.getMessage());
        }

    }
}

it was executed without any errors but the files won’t copied.

My eclipse IDE’s console’s output is:

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>set src=C:/Users/FSSD/Desktop/Screenshot 

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>shift

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>set dest=E: 

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>if "E:" == "" goto :EOF 

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>xcopy "C:/Users/FSSD/Desktop/Screenshot" "E:" /E 

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>goto Loop 

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>shift

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>set dest=F: 

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>if "F:" == "" goto :EOF 

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>xcopy "C:/Users/FSSD/Desktop/Screenshot" "F:" /E 

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>goto Loop 

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>shift

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>set dest= 

C:\Users\FSSD\IndigoWorkSpace\Multi_Copy>if "" == "" goto :EOF 

In this, what is my mistake, how can i get the exact output. Reply me as soon as possible. Thanks in advance…!

Answer 1

Parameters to ProcessBuilder may not contain spaces, instead of

String exe_Cmd = "c:/Windows/System32/mcopy C:/Users/FSSD/Desktop/Screenshot E: F:";

you need

String[] pars = {"cmd.exe", "/C","c:/Windows/System32/mcopy","C:/Users/FSSD/Desktop/Screenshot","E:","F:"};
Runtime r = Runtime.getRuntime();
ProcessBuilder p = new ProcessBuilder(pars);

But I still would rather use a Java solution, like I suggested in the comments already 😉