【Linux】Linux下shell启动jar包

一个更好的sh文件：

启动命令：sh xxx.sh start
停止命令：sh xxx.sh stop
查看状态命令：sh xxx.sh status
重启命令：sh xxx.sh restart

#!/bin/bash
#进入当前目录 并自动获取jar包
cd `dirname $0`
APP_HOME='path'
 
APP_NAME="`cd ${APP_HOME} && find -name '*.jar' `"
#使用说明，用来提示输入参数
usage() {
    echo "Usage: sh robotcenter.sh [start|stop|restart|status]"
    exit 1
}
  
#检查程序是否在运行
is_exist(){
  pid=`ps -ef|grep $APP_NAME|grep -v grep|awk '{print $2}'`
  #如果不存在返回1，存在返回0    
  if [ -z "${pid}" ]; then
   return 1
  else
    return 0
  fi
}
  
#启动方法
start(){
  is_exist
  if [ $? -eq 0 ]; then
    echo "${APP_NAME} is already running. pid=${pid}"
  else
    nohup java -jar ${APP_NAME}  >/dev/null 2>&1 &
    #Xms Xmx  指定虚拟内存上下限
    #nohup ${JRE_HOME}/bin/java -Xms128m -Xmx512m -jar ${APP_NAME} >/dev/null 2>&1 &
    echo "..."
    sleep 2
    echo "..."
    sleep 3
    is_exist
    if [ $? -eq 0 ]; then
      echo "${APP_NAME} is running success. pid=${pid}"
    fi
  fi
}
  
#停止方法
stop(){
  is_exist
  if [ $? -eq "0" ]; then
    kill -9 $pid
    echo "..."
    sleep 2
    is_exist
    if [ $? -eq 0 ]; then
      echo "${APP_NAME} still in the running. pid=${pid}"
    else
      echo "${APP_NAME} has stopped running."
    fi
  else
    echo "${APP_NAME} is not running"
  fi  
}
  
#输出运行状态
status(){
  is_exist
  if [ $? -eq "0" ]; then
    echo "${APP_NAME} is running. Pid is ${pid}"
  else
    echo "${APP_NAME} is NOT running."
  fi
}
  
#重启
restart(){
  stop
  #sleep 5
  start
}
  
#根据输入参数，选择执行对应方法，不输入则执行使用说明
case "$1" in
  "start")
    start
    ;;
  "stop")
    stop
    ;;
  "status")
    status
    ;;
  "restart")
    restart
    ;;
  *)
    usage
    ;;
esac