java variable linked to batch file

问题

I am currently learning java and I encountered this problem. I am not sure if it can be done like this as I am still in the learning stage. So in my java main coding:

import java.io.File;
import java.io.IOException;

public class TestRun1
{
    public static void main(String args[])
    {

        //Detect usb drive letter
        drive d = new drive();
        System.out.println(d.detectDrive());

        //Check for .raw files in the drive (e.g. E:\)
        MainEntry m = new MainEntry();
        m.walkin(new File(d.detectDrive()));

        try
        {
            Runtime rt = Runtime.getRuntime();
            Process p = rt.exec("cmd /c start d.detectDrive()\\MyBatchFile.bat");
        } 
        catch (IOException e)
        {
            e.printStackTrace();
        }
    }
}

The "cmd /c start d.detectDrive()\MyBatchFile.bat" does not work. I do not know how to replace the variable.

And i created a batch file (MyBatchFile.bat):

@echo off
set Path1 = d.detectDrive()
Path1
pause
set Path2 = m.walkin(new File(d.detectDrive()))
vol231.exe -f Path2 imageinfo > Volatility.txt
pause
exit

It does not work. Please do not laugh.

I really isn't good in programming since I just started on java and batch file. Can anyone help me with it? I don't want to hard code it to become a E: or something like that. I want to make it flexible. But I have no idea how to do it. I sincerely ask for any help.

回答1:

Procedure:

You should append the return value of the method which detects the drive, to the filename and compose the proper Batch command string.

Steps:

Get the return value of the method

String drive = d.detectDrive();
so, drive contains the value E:

append the value of drive to the filename

drive+"\MyBatchFile.bat"
so, we have E:\MyBatchFile.bat

append the result the batch command

cmd /c start "+drive+"\MyBatchFile.bat
result is cmd /c start E:\MyBatchFile.bat

So to invoke the batch command, the final code should be as follows:

    try {
        System.out.println(d.detectDrive()); 
        Runtime rt = Runtime.getRuntime();
        String drive = d.detectDrive();
        // <<---append the return value to the compose Batch command string--->>
        Process p = rt.exec("cmd /c start "+drive+"\\MyBatchFile.bat");
    } 
    catch (IOException e) {
        e.printStackTrace();
    }

来源：https://stackoverflow.com/questions/24750149/java-variable-linked-to-batch-file

标签

java

variables

batch-file

volatility