小波Note

        API_NAME=it-fb-1.0.0.jar
JAR_NAME=./$API_NAME
#PID represents the PID file
PID=$API_NAME\.pid
 
#Instructions for use, used to prompt input parameters
usage() {
    echo "Usage: sh 执行脚本.sh [start|stop|restart|status]"
    exit 1
}
 
#Check if the program is running
is_exist(){
  pid=`ps -ef|grep $JAR_NAME|grep -v grep|awk '{print $2}' `
  #Return 1 if it does not exist, return 0 if it exists    
  if [ -z "${pid}" ]; then
   return 1
  else
    return 0
  fi
}
 
#启动方法
start(){
  is_exist
  if [ $? -eq "0" ]; then
    echo ">>> ${JAR_NAME} is already running PID=${pid} <<<"
  else
    nohup java -Xms256m -Xmx512m -jar $JAR_NAME >> ./$API_NAME\.log 2>&1 &
    echo $! > $PID
    echo ">>> start $JAR_NAME successed PID=$! <<<"
   fi
  }
 
#停止方法
stop(){
  #is_exist
  pidf=$(cat $PID)
  #echo "$pidf" 
  echo ">>> api PID = $pidf begin kill $pidf <<<"
  kill $pidf
  rm -rf $PID
  sleep 2
  is_exist
  if [ $? -eq "0" ]; then
    echo ">>> api 2 PID = $pid begin kill -9 $pid  <<<"
    kill -9  $pid
    sleep 2
    echo ">>> $JAR_NAME process stopped <<<" 
  else
    echo ">>> ${JAR_NAME} is not running <<<"
  fi 
}
 
status(){
  is_exist
  if [ $? -eq "0" ]; then
    echo ">>> ${JAR_NAME} is running PID is ${pid} <<<"
  else
    echo ">>> ${JAR_NAME} is not running <<<"
  fi
}
 
restart(){
  stop
  start
}
case "$1" in
  "start")
    start
    ;;
  "stop")
    stop
    ;;
  "status")
    status
    ;;
  "restart")
    restart
    ;;
  *)
    usage
    ;;
esac
exit 0