restart tomcat script

#!/bin/sh
p='/opt/apache-tomcat-8.0.8'
work=${p}'/work/'
rm -rf ${work}
tomcatpath=${p}'/bin'
echo 'operate restart tomcat: '$tomcatpath
pid=ps aux | grep $tomcatpath | grep -v grep | grep -v retomcat | awk '{print $2}'
echo 'exist pid:'$pid

if [ -n "$pid" ]
then
{
echo ===========shutdown================
$tomcatpath'/shutdown.sh'
sleep 2
pid=ps aux | grep $tomcatpath | grep -v grep | grep -v retomcat | awk '{print $2}'
if [ -n "$pid" ]
then
{
sleep 2
echo ========kill tomcat begin==============
echo $pid
kill -9 $pid
echo ========kill tomcat end==============
}
fi
sleep 2
echo ===========startup.sh==============
$tomcatpath'/startup.sh'
}
else
echo ===========startup.sh==============
$tomcatpath'/startup.sh'