centos时刻检查java状态并重启

#!/bin/sh
export LANG="en_US.UTF-8"
export JAVA_HOME=/usr/java/jdk1.8.0_152
export PATH=$JAVA_HOME/bin:$PATH 
export CLASSPATH=.:$JAVA_HOME/dt.jar:$JAVA_HOME/tools.jar 
#java
#http://www.wityx.com/post/829_1_1.html
jarDir="/home"
jar="wuliaokankan.cn-1.1-0.0.1.jar"
logFile="/home/logs/restart.log"
restart(){
cd ${2}
if [ ! -f ${1} ];then
echo "jar not exist" >> ${logFile}
return
fi
(java -jar ${1} &)
# iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080
}
#http://www.wityx.com/post/829_1_1.html
check(){
count=$(ps -ef | grep ${1} | grep -v "grep")
if [ -n "${count}" ];then
#echo "`date` ${1} is running" >> ${logFile}
echo "`date` ${1} s running"
else
restart ${1} ${2}
echo "`date` ${1} is down. restartig" >> ${logFile}
#echo "`date` ${1} is down"
fi
}
check ${jar} ${jarDir}