定时cronjob调用Java程序

一个部署在Linux环境的Java企业应用后台经常会在大半夜运行很多定时的任务，本篇文章总结下如何使用shell脚本调用Java程序，以备忘。什么时候Linux才能完美？ http://www.linuxidc.com/Linux/2014-09/107098.htm1. setupenv.shexport APP_HOME=`pwd`if [ -z "$JAVA_HOME" ] ; then
JAVA=`which java`
if [ -z "$JAVA" ] ; then
echo "Cannot find JAVA. Please set your PATH."
exit 1
fi
JAVA_BIN=`dirname $JAVA`
JAVA_HOME=$JAVA_BIN/..
fiPATH_SEPARATOR=":"
if [ $OSTYPE = "cygwin32" ] ; then
PATH_SEPARATOR=";"
fi
if [ $OSTYPE = "cygwin" ] ; then
PATH_SEPARATOR=";"
fi
JAVA=$JAVA_HOME/bin/javaCLASSPATH=$JAVA_HOME/lib/tools.jar
CLASSPATH=`echo ${APP_HOME}/lib/*.jar | tr " " ${PATH_SEPARATOR}`${PATH_SEPARATOR}${CLASSPATH}
CLASSPATH=`echo ${APP_HOME}/lib/*.zip | tr " " ${PATH_SEPARATOR}`${PATH_SEPARATOR}${CLASSPATH}
CLASSPATH=`echo ${ANT_HOME}/lib/*.jar | tr " " ${PATH_SEPARATOR}`${PATH_SEPARATOR}${CLASSPATH}
CLASSPATH=`echo ${ANT_HOME}/lib/*.zip | tr " " ${PATH_SEPARATOR}`${PATH_SEPARATOR}${CLASSPATH}
CLASSPATH=${APP_HOME}/build/classes${PATH_SEPARATOR}${CLASSPATH}
export CLASSPATH### load other variables from profile
source /etc/profile #set all env2. app.sh#！/bin/sh
# -----------------------------------------------------------------------------
# app.sh - Script to run applications
#
# Environment Variable Prequisites
#
# APP_HOME （Optional） May point at your APP "build" directory.
# If not present, the current working directory is assumed.
# APP_OPTS （Optional） Java runtime options used when the "start",
# "stop", or "run" command is executed.
# JAVA_HOME Must point at your Java Development Kit installation.
# -----------------------------------------------------------------------------# ----- Checking JVM variables -------------------------
export JAVA_PARAM=$1
if [ "$JAVA_PARAM" = "-javaMax" ]
then
shift
export memoryX=$1
shift
else
export memoryX="1024"
fiexport JAVA_PARAM=$1
if [ "$JAVA_PARAM" = "-jmxHost" ]
then
shift
jmxHost=$1
shift
fiexport JAVA_PARAM=$1
if [ "$JAVA_PARAM" = "-jmxPort" ]
then
shift
jmxPort=$1
shift
fi# fix env. issues
source /etc/profile# ----- Verify and Set Required Environment Variables -------------------------
export LANG="en_US.UTF8" if [ -z "$APP_HOME" ] ; then
## resolve links - $0 may be a link to home
PRG=$0
progname=`basename $0`

while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : ".*-> （.*）$"`
if expr "$link" : ".*/.*" > /dev/null; then
PRG="$link"
else
PRG="`dirname $PRG`/$link"
fi
done

APP_HOME_1=`dirname "$PRG"`/../..
echo "Guessing APP_HOME from app.sh to ${APP_HOME_1}"
if [ -d ${APP_HOME_1}/properties ] ; then
APP_HOME=${APP_HOME_1}
echo "Setting APP_HOME to $APP_HOME"
fi
fi

if [ -z "$APP_OPTS" ] ; then
APP_OPTS=""
fi

if [ -z "$JPDA_OPTS" ] ; then
JPDA_OPTS="-Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n"
fi

if [ -z "$JAVA_HOME" ] ; then
echo You must set JAVA_HOME to point at your Java Development Kit installation
exit 1
fi
# ----- Cygwin Unix Paths Setup -----------------------------------------------# Cygwin support. $cygwin _must_ be set to either true or false.
case "`uname`" in
CYGWIN*） cygwin=true ;;
*） cygwin=false ;;
esac

# For Cygwin, ensure paths are in UNIX format before anything is touched
if $cygwin ; then
[ -n "$APP_HOME" ] &&
APP_HOME=`cygpath --unix "$APP_HOME"`
[ -n "$JAVA_HOME" ] &&
JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
fi
# ----- Set Up The Classpath -------------------------------------------CP=${APP_HOME}/build/classesCP=`echo ${APP_HOME}/lib/*.jar | tr " " :`:${CP}
CP=`echo ${APP_HOME}/lib/*.zip | tr " " :`:${CP}
if [ -f "$JAVA_HOME/lib/tools.jar" ] ; then
CP=$CP:"$JAVA_HOME/lib/tools.jar"
fi# ----- Cygwin Windows Paths Setup --------------------------------------------# convert the existing path to windows
if $cygwin ; then
CP=`cygpath --path --windows "$CP"`
APP_HOME=`cygpath --path --windows "$APP_HOME"`
JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
fi
# ----- Execute The Requested Command -----------------------------------------echo "Using CLASSPATH: $CP"
echo "Using APP_HOME: $APP_HOME"
echo "Using JAVA_HOME: $JAVA_HOME"JMX_OPTS=""if [ "$jmxHost" ！= "" ]
then
JMX_OPTS=" -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote -Djava.rmi.server.hostname="$jmxHost
fiif [ "$jmxPort" ！= "" ]
then
JMX_OPTS=$JMX_OPTS" -Dcom.sun.management.jmxremote.port="$jmxPort
fiexport JAVA_OPTS="-verbosegc -XX:+PrintGCDetails -XX:+PrintTenuringDistribution"JAVA_OPTS=$JAVA_OPTS" "-server" "-Xms256M" "-Xmx$memoryX"M "-XX:NewSize=128m" "-XX:MaxNewSize=128m" "-XX:+UseConcMarkSweepGC" "-Xconcurrentio" "-Xnoclassgc""
JAVA_OPTS=$JAVA_OPTS" "$JMX_OPTSJAVA_OPTS=$JAVA_OPTS" "-DOracle.jdbc.V8Compatible=true$JAVA_HOME/bin/java ${JAVA_OPTS} $APP_OPTS -classpath $CP -Dapp.base=$APP_BASE -Dapp.home=$APP_HOME -Djava.library.path=$HOME/JMagick/lib $@3. runMyJob.sh#！/bin/sh
#=============================================================================
# Desc : MyJob
# 00 03 * * * /home/app/src/scripts/runMyJob.sh 0 >> /home/app/runMyJob0.log 2>&1
#=============================================================================export APP_HOME=$HOME/app
cd $HOME
. .bashrc
cd $APP_HOME
. setupenv.shLOCKFILE="$HOME/MyJob$1.lock";
CONCURRENT_WARNING="MyJob lock file found: $LOCKFILE Probably a previous job is still executing, please wait for a while and try again later. ";
init_day=`date +%Y%m%d%H%M`;logfile="$HOME/MyJob$1_$init_day.log";if [ -f $LOCKFILE ]
then
echo "$CONCURRENT_WARNING";
exit 1;
fi#create a lock file to prevent concurrent job requests
touch $LOCKFILEecho ">>>>>START at `date`"
echo ">>> execute the business ...."
$APP_HOME/src/scripts/app.sh -javaMax 2049 com.zdp.MyJob $1 >> $logfile 2>&1
echo ">>> $1 .... "#gzip log file
gzip $logfile;#move the log to the logs directory
cd $HOME
mv $logfile.gz $HOME/logs/# remove lock file
rm -rf $LOCKFILEecho ">>>>> END at `date`"4. Java程序：MyJob.javapackage com.zdp;public class MyJob {
private static String MODE = "0";
public static void main（String args[]） throws Exception {
try {
System.out.println（"----------------- START -----------------"）;
long begin = System.currentTimeMillis（）;
if （args.length > 0） {
MODE = args[0];
}

// main logic

long end = System.currentTimeMillis（）;
System.out.println（"<<<<<<<<<<<<<<<<<<<< Total spent time: " + （end - begin） / 1000 + "s >>>>>>>>>>>>>>>>>>>>"）;
System.out.println（"----------------- END -------------------"）;
} catch （Exception e） {
logger.error（e.getMessage（）, e）;
System.exit（1）;
} finally{
System.exit（0）;
}
}

}本文永久更新链接地址：http://www.linuxidc.com/Linux/2015-01/112577.htm