Run batch file from Java code

Question

I am trying to run a batch file that is in another directory from my Java executable. I have the following code :

    try {
        Process p =  Runtime.getRuntime().exec("cmd /c start \"C:\\Program Files\\salesforce.com\\Data Loader\\cliq_process\\upsert\\upsert.bat\"") ;           
    } catch (IOException ex) {
    }

The result is that the program opens a cmd window in the root directory where the program was run at and doesn't access the file path I provided.

Answer 1

Rather than Runtime.exec(String command), you need to use the exec(String command, String[] envp, File dir) method signature:

Process p =  Runtime.getRuntime().exec("cmd /c upsert.bat", null, new File("C:\\Program Files\\salesforce.com\\Data Loader\\cliq_process\\upsert"));

But personally, I'd use ProcessBuilder instead, which is a little more verbose but much easier to use and debug than Runtime.exec().

ProcessBuilder pb = new ProcessBuilder("cmd", "/c", "upsert.bat");
File dir = new File("C:/Program Files/salesforce.com/Data Loader/cliq_process/upsert");
pb.directory(dir);
Process p = pb.start();

Answer 2

try following

try {
            String[] command = {"cmd.exe", "/C", "Start", "D:\\test.bat"};
            Process p =  Runtime.getRuntime().exec(command);           
        } catch (IOException ex) {
        }

Answer 3

Following is worked for me

File dir = new File("E:\\test");
        ProcessBuilder pb = new ProcessBuilder("cmd.exe", "/C", "Start","test.bat");
        pb.directory(dir);
        Process p = pb.start();

Answer 4

Your code is fine, but the problem is inside the batch file.

You have to show the content of the bat file, your problem is in the paths inside the bat file.

Answer 5

import java.lang.Runtime;

Process run = Runtime.getRuntime().exec("cmd.exe", "/c", "Start", "path of the bat file");

This will work for you and is easy to use.