Java ProcessBuilder and bash

Question

我试图用 ProcessBuilder执行java的bash脚本我的代码是：

 Process createUser = buildProcess(
            "/bin/su",
            "-c",
            ""/opt/somedir/testdir/current/bin/psql",
            "--command",
            commandForUserCreation,
            /* "'select * from users'", */
            "--dbname",
            "mydbname"",
            "myuser"
            );

问题是我收到错误：

 /bin/su: unrecognized option '--dbname'

如果我将 echo放在命令的第一名中，它将在bash中打印正确的命令，如果我复制/粘贴此命令，则可以工作！

请帮助我解决此问题。

Answer 1

您需要提供整个命令以通过su作为单个参数执行。尝试以下操作：

 Process createUser = buildProcess(
            "/bin/su",
            "-c",
            "/opt/vmware/vpostgres/current/bin/psql --command " + commandForUserCreation + " --dbname mydbname",
            myuser
            );

Answer 2

这是我在ProcessBuilder中使用的内容：

String[] command = new String[] {"echo", "Hello"};
String workspace = "/bin/su";
System.out.println("Trying to run command: "+ Arrays.toString(command));
ProcessBuilder probuilder = new ProcessBuilder(command);
probuilder.directory(new File(workspace));
Process process = probuilder.start();
InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;
System.out.printf("Output of running %s is:n",Arrays.toString(command));
while ((line = br.readLine()) != null) {
    System.out.println(line);
}

我希望它有帮助。