这个脚本的作用就是通过读取文件里面的包名，然后将包名进行json序列化输出，没什么好讲的，套路套一个循环脚本就行。
接下来就是重要的脚本了，调用jstat获取JVM状态，并缓存到文件中。
#cat get_jvmstatus.sh
#!/bin/bash
MAINCLASS="*Main.class"
scriptPath=/usr/local/etc/scripts
cat $scriptPath/package_path.txt|while read line
do
packageName=$(echo $line|awk '{print $1}')
pgRootPath=$(echo $line|awk '{print $2}')
if [[ -d $pgRootPath/tomcat ]];then
pid=$(cat $pgRootPath/tomcat/tomcat.pid)
else
mainPath=$(find $pgRootPath -name $MAINCLASS)
appName=$(echo ${mainPath##*classes/}|sed 's#/#.#g'|sed 's#.class##g')
pid=$(ps -fC java|grep "$appName"|awk '{print $2}')
fi
javaHome=/usr/local/java/jdk1.8.0
#javaHome=/usr/local/java/latest
#if [[ -r $pgRootPath/appconfig ]] && [ `grep ^JAVA_HOME= $pgRootPath/appconfig|wc -l` == 1 ] && [ `grep ^JAVA_HOME= $pgRootPath/appconfig|grep 8|wc -l` == 1 ];then
#javaHome=$(grep ^JAVA_HOME= $pgRootPath/appconfig 2>/dev/null|awk -F'=' '{print $2}')
#javaHome=/usr/local/java/jdk1.8.0
#else
# if [[ -r $pgRootPath/webconfig ]] && [ `grep ^'export JAVA_HOME=' $pgRootPath/webconfig|wc -l` == 1 ] && [ `grep ^'export JAVA_HOME=' $pgRootPath/webconfig|grep 8|wc -l` == 1 ];then
# #javaHome=$(grep ^'export JAVA_HOME=' $pgRootPath/webconfig 2>/dev/null|awk -F'"' '{print $2}')
# javaHome=/usr/local/java/jdk1.8.0
#fi
#fi
#echo --------------------------------$pgRootPath
#echo $javaHome
echo -------------------------------$pid
sleep 5
#echo -n >$scriptPath/package/$packageName
#$javaHome/bin/jstat -gccapacity $pid > ./package/$packageName 2>/dev/null
#$javaHome/bin/jmap -heap $pid>>./package/$packageName 2>/dev/null
echo gcnew >> $scriptPath/package/$packageName 2>/dev/null
$javaHome/bin/jstat -gcnew $pid >> $scriptPath/package/$packageName 2>/dev/null
echo gcutil >> $scriptPath/package/$packageName 2>/dev/null
$javaHome/bin/jstat -gcutil $pid >> $scriptPath/package/$packageName 2>/dev/null
echo gcnewcapacity >> $scriptPath/package/$packageName 2>/dev/null
$javaHome/bin/jstat -gcnewcapacity $pid >> $scriptPath/package/$packageName 2>/dev/null
echo gccapacity >> $scriptPath/package/$packageName 2>/dev/null
$javaHome/bin/jstat -gccapacity $pid >> $scriptPath/package/$packageName 2>/dev/null
#echo gcold >> $scriptPath/package/$packageName 2>/dev/null
#$javaHome/bin/jstat -gcold $pid >> $scriptPath/package/$packageName 2>/dev/null
echo gc >> $scriptPath/package/$packageName 2>/dev/null
$javaHome/bin/jstat -gc $pid >> $scriptPath/package/$packageName 2>/dev/null
echo class >> $scriptPath/package/$packageName 2>/dev/null
$javaHome/bin/jstat -class $pid >> $scriptPath/package/$packageName 2>/dev/null
echo cpu >> $scriptPath/package/$packageName 2>/dev/null
echo -e "CPU\n$( ps aux|grep $pid|grep -v grep|awk '{print $3}')" >> $scriptPath/package/$packageName 2>/dev/null
echo mem >> $scriptPath/package/$packageName 2>/dev/null
echo -e "MEM\n$( ps aux|grep $pid|grep -v grep|awk '{print $6}')" >> $scriptPath/package/$packageName 2>/dev/null
done