I have a java servlet running in a server, plus an 'exe file' located in the same server,
i want , in respond to the client passed parameters to the servlet , to run the exe file located on the server and show it to the client , even a screen shot,,
any ideas??!! please help
You can use Process and Runtime classes
Eg :
Runtime r = Runtime.getRuntime();
Process p = r.getRuntime().exec("C:\\newfolder\\run.exe");
For taking screenshot refer to how to take sc in java
This way you can save the image and then send this image to user.
For sending image to client refer to how to send file from sever to client
these are.the pieces , you need to put them together
UPDATE 1 : to kill the exe you can use p.destroy() ( not a good implementation though, as it forcefully kills the process)
UPDATE2 : to check if the process( which is executing your exe) hence to check if the exe is running or not, you can refer to how to check if a process is running
You can run an external command in Java by the following code:
Process p = Runtime.getRuntime().exec("your_external_program_here");
You can pass in parameters as well, simply amend the above line to include what parameters you want to pass into the program.
To retrieve the 'output' of the process you need to get the input stream for the process:
InputStream output = p.getInputStream();
Note the input stream is the piped output of the process. You can then view the contents (advisable to use a buffered reader) like this:
String line;
BufferedReader reader = new BufferedReader(new InputStreamReader(output));
while ((line = reader.readLine()) != null) { ... }
Or alternatively you can look at ProcessBuilder which is easier to use :)
