Run a command in Java

Question

I want to run the command mvn liquibase:update if the user of the application sends the word run as command. How can I do it?

I already tried the following

 if (args[0].equals("run")) {
 Runtime rt = Runtime.getRuntime();
 try {
 Process pr = rt.exec("mvn liquibase:update");
 } catch (IOException e) {
 e.printStackTrace();
 }

but I get the following error

ava.io.IOException: Cannot run program "mvn": CreateProcess error=2, O sistema não conseguiu localizar o ficheiro especificado
 at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1142)
 at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1073)
 at java.base/java.lang.Runtime.exec(Runtime.java:591)
 at java.base/java.lang.Runtime.exec(Runtime.java:415)
 at java.base/java.lang.Runtime.exec(Runtime.java:312)
 at com.petapilot.migrations.MigrationsApplication.main(MigrationsApplication.java:25)
Caused by: java.io.IOException: CreateProcess error=2, O sistema não conseguiu localizar o ficheiro especificado
 at java.base/java.lang.ProcessImpl.create(Native Method)
 at java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:483)
 at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:158)
 at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1109)
 ... 5 more

Answer 1

Try this instead;

Process pr = rt.exec("cmd /c mvn liquibase:update");

• Fabio: it worked but the only provided feedback is "Process finished with code 0". Is it possible to present the output of that command if runned in the console?