如何使用 SIGKILL Process.destroy() 在 java 中杀死 Linux 进程执行 SIGTERM
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how can I kill a Linux process in java with SIGKILL Process.destroy() does SIGTERM
提问by ekeren
In Linux when I run the destroy function on java.lang.Process object (Which is true typed java.lang.UNIXProcess ) it sends a SIGTERM signal to process, is there a way to kill it with SIGKILL?
在 Linux 中，当我在 java.lang.Process 对象（这是真正类型的 java.lang.UNIXProcess ）上运行 destroy 函数时，它会发送一个 SIGTERM 信号来处理，有没有办法用 SIGKILL 杀死它？
采纳答案by Stephen C
Not using pure Java.
不使用纯Java。
Your simplest alternative is to use Runtime.exec()to run a kill -9 <pid>command as an external process.
你最简单的选择是使用Runtime.exec()运行kill -9 <pid>的外部进程的命令。
Unfortunately, it is not that simple to get hold of the PID. You will either need to use reflection black-magic to access the private int pidfield, or mess around with the output from the pscommand.
不幸的是，要掌握 PID 并不是那么简单。您要么需要使用反射黑魔法来访问该private int pid字段，要么需要处理ps命令的输出。
UPDATE- actually, there is another way. Create a little utility (C program, shell script, whatever) that will run the real external application. Code the utility so that it remembers the PID of the child process, and sets up a signal handler for SIGTERM that will SIGKILL the child process.
更新- 实际上，还有另一种方式。创建一个小实用程序（C 程序、shell 脚本等）来运行真正的外部应用程序。对该实用程序进行编码，使其记住子进程的 PID，并为 SIGTERM 设置一个信号处理程序，该信号处理程序将 SIGKILL 子进程。
回答by Martijn Courteaux
Stephen his answer is correct. I wrote what he said:
斯蒂芬他的回答是正确的。我写了他说的：
public static int getUnixPID(Process process) throws Exception
{
System.out.println(process.getClass().getName());
if (process.getClass().getName().equals("java.lang.UNIXProcess"))
{
Class cl = process.getClass();
Field field = cl.getDeclaredField("pid");
field.setAccessible(true);
Object pidObject = field.get(process);
return (Integer) pidObject;
} else
{
throw new IllegalArgumentException("Needs to be a UNIXProcess");
}
}
public static int killUnixProcess(Process process) throws Exception
{
int pid = getUnixPID(process);
return Runtime.getRuntime().exec("kill " + pid).waitFor();
}
You can also get the pid this way:
您还可以通过以下方式获取 pid：
public static int getPID() {
String tmp = java.lang.management.ManagementFactory.getRuntimeMXBean().getName();
tmp = tmp.split("@")[0];
return Integer.valueOf(tmp);
}
回答by user4757345
If you know process name you can use pkill
如果您知道进程名称，则可以使用 pkill
Runtime.getRuntime().exec("pkill firefox").waitFor();
回答by Ercksen
Since Java 1.8
从 Java 1.8 开始
you can call the method destroyForcibly(), which calls the destroy()method by default, but according to the Java docs, all sub-processes returned by ProcessBuilderor Runtime.exec()implement this method.
您可以调用该方法destroyForcibly()，该destroy()方法默认调用该方法，但根据Java 文档，所有子进程返回ProcessBuilder或Runtime.exec()实现该方法。
