使用shell脚本启动java后台线程

启动脚本如下（文件名称run.sh）

#!/bin/sh
#===============此处的APP_MAINCLASS 是main 方法所在类
APP_MAINCLASS=com.iflytek.sgy.sjxj.node.main.NodeStartup
JMS_OPTS="-Xms256m -Xmx1024m"
#==============此处的debug_opts 是设置java 远程调试（remote java application）
DUBUG_OPTS="-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=6005"

#===================================================
APP_HOME=`dirname $0`
CLASSPATH=$APP_HOME/
psid=0
#===================================================

checkpid2(){
javaps=`$JAVA_HOME/bin/jps -l | grep $APP_MAINCLASS`

if [ -n "$javaps" ]; then
psid=`echo $javaps | awk '{print $1}'`
else
psid=0
fi
}
checkpid(){
if [ ! -f "$APP_HOME/server.pid" ]; then
psid=0
else
psid=`cat $APP_HOME/server.pid`
javaps=`ps -p $psid | grep java`
if [ -z "$javaps" ]; then
psid=0
rm -rf $APP_HOME/server.pid
fi
fi
}

start() {
checkpid

if [ $psid -ne 0 ]; then
echo "================================"
echo "warn: $APP_MAINCLASS already started! (pid=$psid)"
echo "================================"
else
echo -n "Starting $APP_MAINCLASS ..."
if [ ! -d "$APP_HOME/../log/" ]; then
mkdir "$APP_HOME/../log/"
fi
cd $APP_HOME
#nohup java -classpath .:../lib/*:../resources $JMS_OPTS $DUBUG_OPTS $APP_MAINCLASS >> $APP_HOME/../log/server.log 2>&1 &

nohup java -classpath .:../lib/*:../resources $JMS_OPTS $DUBUG_OPTS $APP_MAINCLASS $@>/dev/null 2>&1 &
echo $! > $APP_HOME/server.pid

checkpid
if [ $psid -ne 0 ]; then
echo "(pid=$psid) [OK]"
else
echo "[Failed]"
fi
fi
}

stop() {
checkpid

if [ $psid -ne 0 ]; then
echo -n "Stopping $APP_MAINCLASS ...(pid=$psid) "
su - $RUNNING_USER -c "kill -9 $psid"
rm -rf $APP_HOME/server.pid
if [ $? -eq 0 ]; then
echo "[OK]"
else
echo "[Failed]"
fi

checkpid
if [ $psid -ne 0 ]; then
stop
fi
else
echo "================================"
echo "warn: $APP_MAINCLASS is not running"
echo "================================"
fi
}

status() {
checkpid

if [ $psid -ne 0 ]; then
echo "$APP_MAINCLASS is running! (pid=$psid)"
else
echo "$APP_MAINCLASS is not running"
fi
}

info() {
echo "System Information:"
echo "****************************"
echo `head -n 1 /etc/issue`
echo `uname -a`
echo
echo "JAVA_HOME=$JAVA_HOME"
echo `$JAVA_HOME/bin/java -version`
echo
echo "APP_HOME=$APP_HOME"
echo "APP_MAINCLASS=$APP_MAINCLASS"
echo "****************************"
}

case "$1" in
start)
start

;;
stop)
stop
;;
restart)
stop
start
;;
status)
status
;;
info)
info
;;
*)
echo "Usage: $0 {start|stop|restart|status|info}"
exit 1
esac
exit 0