Thank you very much! That was exactly what I want.
在 2011年9月28日星期三，Siegfried Goeschl <[email protected]> 写道： > Hi, > > if I understand that correctly you would like to get some keyboard input for your child process - I have never done that but I think the following snippet from DefaultExecutorTest might show you the way > > Cheers, > > Siegfried Goeschl > > /** > * The test script reads an argument from <code>stdin<code> and prints > * the result to stdout. To make things slightly more interesting > * we are using an asynchronous process. > * > * @throws Exception the test failed > */ > public void testStdInHandling() throws Exception { > > ByteArrayInputStream bais = new ByteArrayInputStream("Foo".getBytes()); // newline not needed; causes problems for VMS > CommandLine cl = new CommandLine(this.stdinSript); > PumpStreamHandler pumpStreamHandler = new PumpStreamHandler( this.baos, System.err, bais); > DefaultExecuteResultHandler resultHandler = new DefaultExecuteResultHandler(); > Executor executor = new DefaultExecutor(); > executor.setStreamHandler(pumpStreamHandler); > executor.execute(cl, resultHandler); > > resultHandler.waitFor(WAITFOR_TIMEOUT); > assertTrue("ResultHandler received a result", resultHandler.hasResult()); > > assertFalse(exec.isFailure(resultHandler.getExitValue())); > String result = baos.toString(); > assertTrue("Result '"+result+"' should contain 'Hello Foo!'", result.indexOf("Hello Foo!") >= 0); > } > > > On 27.09.11 09:41, Yi Huang wrote: >> >> For example: >> >> import java.util.Scanner; >> >> public class ToBeCalled { >> >> public static void main(String[] args) { >> Scanner keyboard = new Scanner(System.in); >> int t = keyboard.nextInt(); >> System.out.println(t); >> } >> } >> >> How could I use exec to let it run properly? >> I have tried this: >> >> // compile >> cmdline = CommandLine.parse("javac"); >> executor = new DefaultExecutor(); >> cmdline.addArgument("ToBeCalled.java"); >> exitValue = executor.execute(cmdline); >> System.out.println("compile: " + exitValue); >> >> // run >> cmdline = CommandLine.parse("java"); >> cmdline.addArgument("ToBeCalled"); >> cmdline.addArgument("abc"); >> cmdline.addArgument("def"); >> executor = new DefaultExecutor(); >> exitValue = executor.execute(cmdline); >> System.out.println("run: " + exitValue); >> >> It did compile, but crashed and said that there is no argument in nextInt() >> How could I fix that? >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > >
