java 捕捉信号(linux下的kill,ctrl+c)

import sun.misc.Signal; import sun.misc.SignalHandler; /*** * java信号处理demo * @author jiang_qh * */ public class SignalHandlerExample implements SignalHandler{ private SignalHandler oldHandler; public void handle(Signal signal) { System.out.println("Signal handler called for signal " + signal); try { signalAction(signal); // Chain back to previous handler, if one exists if (oldHandler != SIG_DFL && oldHandler != SIG_IGN) { oldHandler.handle(signal); } } catch (Exception e) { System.out.println("handle|Signal handler" +"failed, reason " + e.getMessage()); e.printStackTrace(); } } public void signalAction(Signal signal) { System.out.println("Handling " + signal.getName()); System.out.println("Just sleep for 5 seconds."); try { Thread.sleep(5000); } catch (InterruptedException e) { System.out.println("Interrupted: " + e.getMessage()); } } public static SignalHandler install(String signalName) { Signal diagSignal = new Signal(signalName); SignalHandlerExample instance = new SignalHandlerExample(); instance.oldHandler = Signal.handle(diagSignal, instance); return instance; } public static void main(String[] args) { //kill命令 SignalHandlerExample.install("TERM"); //ctrl+c命令 SignalHandlerExample.install("INT"); System.out.println("Signal handling example."); try { Thread.sleep(50000); } catch (InterruptedException e) { System.out.println("Interrupted: " + e.getMessage()); } } }
在linux上运行该程序。然后kill掉其pid，打印：

Signal handling example.
Signal handler called for signal SIGTERM
Handling TERM
Just sleep for 5 seconds.
[dispatch@localhost ThirdTest]$ sh signal.sh
Signal handling example.
Signal handler called for signal SIGTERM
Handling TERM
Just sleep for 5 seconds.