我需要在Fedora16的终端上从JAVA程序运行一个命令。我试着用
Runtime.getRuntime().exec("xterm");
但这只是打开了终端,我无法执行任何命令。
我还尝试了这个:
OutputStream out = null;
Process proc = new ProcessBuilder("xterm").start();
out = proc.getOutputStream();
out.write("any command".getBytes());
out.flush();
但我仍然只能打开终端,但不能运行命令。你有什么办法吗?
发布于 2014-04-07 13:50:28
我投票给Karthik T的答案。您不需要打开终端就可以运行命令。
例如,
// file: RunShellCommandFromJava.java
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class RunShellCommandFromJava {
public static void main(String[] args) {
String command = "ping -c 3 www.google.com";
Process proc = Runtime.getRuntime().exec(command);
// Read the output
BufferedReader reader =
new BufferedReader(new InputStreamReader(proc.getInputStream()));
String line = "";
while((line = reader.readLine()) != null) {
System.out.print(line + "\n");
}
proc.waitFor();
}
}
输出:
$ javac RunShellCommandFromJava.java
$ java RunShellCommandFromJava
PING http://google.com (123.125.81.12): 56 data bytes
64 bytes from 123.125.81.12: icmp_seq=0 ttl=59 time=108.771 ms
64 bytes from 123.125.81.12: icmp_seq=1 ttl=59 time=119.601 ms
64 bytes from 123.125.81.12: icmp_seq=2 ttl=59 time=11.004 ms
--- http://google.com ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 11.004/79.792/119.601/48.841 ms
发布于 2013-03-12 16:36:55
您实际上不需要从xterm会话中运行命令,可以直接运行它:
String[] arguments = new String[] {"/path/to/executable", "arg0", "arg1", "etc"};
Process proc = new ProcessBuilder(arguments).start();
如果该进程以交互方式响应输入流,并且您希望注入值,则执行之前的操作:
OutputStream out = proc.getOutputStream();
out.write("command\n");
out.flush();
不过,不要忘记结尾的'\n‘,因为大多数应用程序都会使用它来识别单个命令输入的结尾。
发布于 2013-03-12 16:54:24
正如其他人所说,您可以在不使用xterm的情况下运行外部程序。但是,如果您想在终端窗口中运行它,例如让用户与它交互,xterm允许您指定程序作为参数运行。
xterm -e any command
在Java代码中,这变成了:
String[] command = { "xterm", "-e", "my", "command", "with", "parameters" };
Runtime.getRuntime().exec(command);
或者,使用ProcessBuilder:
String[] command = { "xterm", "-e", "my", "command", "with", "parameters" };
Process proc = new ProcessBuilder(command).start();
https://stackoverflow.com/questions/15356405
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