java jar 运行自动重启 linux

echo "Current DIR is " $PWD

# ignore signal hup int quit tstp
trap "" 1 2 3 24

 start_server() {
        ulimit -c unlimited
  #      nohup java -jar LF_S_SignalProc.jar  -Dfile.encoding=UTF-8 >> ist.log & 


        java -jar LF_S_SignalProcDemo.jar -Dfile.encoding=UTF-8  >> ist.log & echo $! > java.pid
#-Dfile.encoding java -jar -Dfile.encoding=UTF-8 LF_S_SignalProc.jar >> ist.log=UTF-8
}


 kill_server() {
   #     ps -aux | grep java | grep -v grep | awk {'print $2'} | xargs kill -2
        pid=$(cat java.pid )
        kill -9 $pid
}

while [ 1 ]
do
        propserverpid=`ps -ef | grep java | grep -v grep |awk '{print $2}'`

        ${now}${propserverpid} >> pid.log
        if [ ! "$propserverpid" ]
        then
                echo "propserver is down, now starting ..."
                start_server
        fi
        sleep 1
done