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。

1. setupenv.sh

export 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/..
fi

PATH_SEPARATOR=':'
if [ $OSTYPE = "cygwin32" ] ; then
? PATH_SEPARATOR=';'
fi
if [ $OSTYPE = "cygwin" ] ; then
? PATH_SEPARATOR=';'
fi
JAVA=$JAVA_HOME/bin/java

CLASSPATH=$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 env

2. 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"
fi

export JAVA_PARAM=$1
if [ "$JAVA_PARAM" = "-jmxHost" ]
then
? ? shift
? ? jmxHost=$1
? ? shift
fi

export 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