You can use the appsign tools like this:
java -jar appsigner.jar -z <filepath> -k debug.p12 -a debug -p 123456 -s <0|1|2...>.

e.g: java -jar appsigner.jar -z com.yunos.homeshell.zip -k system.p12 -a system -p 123456 -s 1;

you must specify filepath use the absolute path.
you must specify sign type by option '-s', and 0 is author sign.
the debug.p12 and system.p12 just for test.
app development must sign app with own key when the app release.
you can produce a key with those command:
1、keytool -keystore debug.keystore -genkey -alias debug
2、keytool -importkeystore -srckeystore debug.keystore -srcstoretype JKS -deststoretype PKCS12 -destkeystore debug.p12

NOTICE:
keyname       alias    password
debug.p12     debug    123456
system.p12    system   123456
platform.p12  platform 123456