processbuilder

问题 I am trying to use execute a command using ProcessBuilder. The command is supposed to write binary data on stdout. How can I get this data in my byte[] ? 回答1: This is a working example that returns true for output 1 and false for output 0 , (throws Exception in all other cases). I also added setting a working path and an environment variable, which is not required for your particular example so you can delete it. You can copy paste this code as a class, compile it to jar and run it. It is

问题 I´m studing about this subject in this page, but I can´t find the solution, how can I execute programs in cmd using ProcessBuilder? I want to compress, open, delete a file with 7zip using the command line. I have this code as example, but doesn´t work, cmd starts but doesn´t create the compress file: String[] commands= {"cmd.exe", "7za", "a", "-t7z", "test.7z", "Test.txt", "/C", "start"}; ProcessBuilder pb = new ProcessBuilder(commands); 回答1: The problem is a little bit in Java (start()

问题 I have a Java program that connects to a local server via sockets and I would like to not have to start the server manually if Java detects that it isn't running. So if Java is not connected to the server then I use a ProcessBuilder to start it: new ProcessBuilder(new String[]{"/bin/bash", "-c", "./start_server"}).start(); Which starts the server, and runs for about 4 minutes, until the server process doesn't respond. It's interesting that if I send more commands it takes less time for this

问题 I am trying to list the content fo an svn folder which contains about 1200 items. Along the lines in "Execute a external program within a groovy script and capture the output", I developed the following code def svnCommand = "svn list ${repoUrl}" def sout = new StringBuilder() def serr = new StringBuilder() Process sproc = svnCommand.execute() sproc.consumeProcessOutput(sout, serr) sproc.waitForProcessOutput() println sout If I am going to run this script I always get a truncated output, no

问题 This question already has answers here : Using Java ProcessBuilder to Execute a Piped Command (2 answers) Closed 5 years ago . I have a shell command my_command that accepts a pipe as input , eg echo "test" | my_command param1 param2 I tried this: cmd.add("echo"); cmd.add( "test"); cmd.add("| my_command"); cmd.add(param1); cmd.add(param2); but i did I not get desired result. cmd is a list declared using ArrayList . thanks 回答1: ProcessBuilder can run only programs but echo is not a program but

问题 The following command works well in command line shp2pgsql -s 4326 /Users/abc.shp | psql -U user1 -h localhost -p 5432 -d postgis However when I run the following command in Java using ProcessBuilder it says command not found. Here is the code: public static void main(String arg[]) throws Exception { ProcessBuilder pb = new ProcessBuilder("/bin/sh -c shp2pgsql /Users/abc.shp | psql -U user1 -h localhost -p 5432 -d postgis"); Process p = pb.start(); showOutput(p.getInputStream(), System.out);

问题 I use ProcessBuilder to start a new process (child) form a java application (host). Something like this: ProcessBuilder processBuilder = createProcess(commandLine); processBuilder.directory(new File(baseDir)); processBuilder.redirectErrorStream(true); Process process = null; try { process = processBuilder.start(); } catch (Exception e) { e.printStackTrace(); } I do see in the system monitor that the child process has been started but it's not functioning unless I stop the host application.

问题 // following code works fine n open notepad... class demo { public static void main(String args[]) { try{ ProcessBuilder pb=new ProcessBuilder("notepad"); pb.start(); }catch(Exception e) {System.out.print(e);} } } //however the above code throws an exception when any other system program is executed class demo { public static void main(String args[]) { try{ ProcessBuilder pb=new ProcessBuilder("calculator"); pb.start(); }catch(Exception e) {System.out.print(e);} } } the above program throws

问题 I'm fairly new to ProcessBuilder and working with threads. In it's current state I have a J-Button which starts a scheduled executor service. The scheduled executor service is used to delegate a process to one of two process builders. The application is meant to record a user conversation. During the conversation, after x minutes it creates a wav and delegates it to an available process for transcription. The problem begins when the transcription class is called. The process is started and

问题 I am trying to have Java execute another program, and it kept immediately erroring out with exit code 128 and nothing sent to stdout or stderr. I tried a simple "java -version" still with no luck. When I run it in a cmd window, it runs fine and this code works on similarly configured other machines (Windows Server 2003 x64, Java 1.6 update 25) When run on command line: C:\Documents and Settings\zugwalt>java -version Output: java version "1.6.0_25" Java(TM) SE Runtime Environment (build1.6.0