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@loc