如何在Java中执行shell命令？
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How to execute shell command in Java?
提问by hdraven
I was thinking if I could send a shell to execute Client-Server ipconfig. Is that possible?
我在想是否可以发送一个 shell 来执行 Client-Server ipconfig。那可能吗？
This is my code in Local:
这是我在本地的代码：
class Comando {
public static void main(String args[]) {
String s = null;
try {
// Determinar en qué SO estamos
String so = System.getProperty("os.name");
String comando;
// Comando para Linux
if (so.equals("Linux"))
comando = "ifconfig";
// Comando para Windows
else
comando = "ipconfig";
// Ejcutamos el comando
Process p = Runtime.getRuntime().exec(comando);
BufferedReader stdInput = new BufferedReader(new InputStreamReader(
p.getInputStream()));
BufferedReader stdError = new BufferedReader(new InputStreamReader(
p.getErrorStream()));
// Leemos la salida del comando
System.out.println("ésta es la salida standard del comando:\n");
while ((s = stdInput.readLine()) != null) {
System.out.println(s);
}
// Leemos los errores si los hubiera
System.out
.println("ésta es la salida standard de error del comando (si la hay):\n");
while ((s = stdError.readLine()) != null) {
System.out.println(s);
}
System.exit(0);
} catch (IOException e) {
System.out.println("Excepción: ");
e.printStackTrace();
System.exit(-1);
}
}
}
Thank You in Advance!
先感谢您！
采纳答案by ambodi
Not a very Stackoverflow friendly question, since I am not sure if you are asking about Shell command execution, or ipconfig in general.
不是一个非常适合 Stackoverflow 的问题，因为我不确定您是在询问 Shell 命令执行还是一般的 ipconfig。
If the first is the case here: Yep, you can use Runtime.getRuntime.exec().
Related Answers (In Stackoverflow):
如果这里是第一种情况：是的，您可以使用Runtime.getRuntime.exec(). 相关答案（在 Stackoverflow 中）：
Moreover to the answers provided there, here is my example on how you do it with "host -t a" command for DNS lookups. I would generally recommend to read through the list you get and append them in an String for logging purposes.
除了那里提供的答案之外，这里是我的示例，说明如何使用“host -t a”命令进行 DNS 查找。我通常建议通读您获得的列表并将它们附加到字符串中以进行记录。
p = Runtime.getRuntime().exec("host -t a " + domain);
p.waitFor();
BufferedReader reader =
new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = "";
while ((line = reader.readLine())!= null) {
sb.append(line + "\n");
}
The other solution which herausuggested was to use ProcessBuilderand execute the command from there. For this you need to use Java SE 7 upwards. Here is an example that starts a process with a modified working directory and environment, and redirects standard output and error to be appended to a log file:
herau建议的另一个解决方案是ProcessBuilder从那里使用和执行命令。为此，您需要向上使用 Java SE 7。这是一个示例，该示例使用修改后的工作目录和环境启动进程，并将标准输出和错误重定向到附加到日志文件中：
ProcessBuilder pb =
new ProcessBuilder("myCommand", "myArg1", "myArg2");
Map<String, String> env = pb.environment();
env.put("VAR1", "myValue");
env.remove("OTHERVAR");
env.put("VAR2", env.get("VAR1") + "suffix");
pb.directory(new File("myDir"));
File log = new File("log");
pb.redirectErrorStream(true);
pb.redirectOutput(Redirect.appendTo(log));
Process p = pb.start();
assert pb.redirectInput() == Redirect.PIPE;
assert pb.redirectOutput().file() == log;
assert p.getInputStream().read() == -1;
If you wanna know more about ProcessBuilder, read through the documentation: Oracle Documentation on Class ProcessBuilder
如果您想了解有关 ProcessBuilder 的更多信息，请通读文档：Oracle 类 ProcessBuilder 文档
