java程序启动脚本

#!/bin/bash

appName=`ls|grep .jar$`
if [ -z $appName ]
then
    echo "Please check that this script and your jar-package is in the same directory!"
    exit
fi

killForceFlag=$

function start()
{
    count=`ps -ef |grep java|grep $appName|wc -l`
    if [ $count !=  ];then
        echo "Maybe $appName is running, please check it..."
    else
        echo "The $appName is starting..."
        nohup java -XX:+UseG1GC -XX:+HeapDumpOnOutOfMemoryError -Xms512M -Xmx4G -jar $appName > /dev/null >& &
    fi
}

function stop()
{
    appId=`ps -ef |grep java|grep $appName|awk '{print $2}'`
    if [ -z $appId ]
    then
        echo "Maybe $appName not running, please check it..."
    else
        echo -n "The $appName is stopping..."
        if [ "$killForceFlag" == "-f" ]
        then
            echo "by force"
            kill - $appId
        else
            echo
            kill $appId
        fi
    fi
}

function status()
{
    appId=`ps -ef |grep java|grep $appName|awk '{print $2}'`
    if [ -z $appId ]
    then
        echo -e "\033[31m Not running \033[0m"
    else
        echo -e "\033[32m Running [$appId] \033[0m"
    fi
}

function restart()
{
    stop
    for i in {..}
    do
        echo -n "$i "
        sleep
    done
    echo
    start
}

function usage()
{
    echo "Usage: $0 {start|stop|restart|status|stop -f}"
    echo "Example: $0 start"
    exit
}

case $ in
    start)
    start;;

    stop)
    stop;;

    restart)
    restart;;

    status)
    status;;

    *)
    usage;;
esac