没有JRE的JavaFX DEB包无法工作

Question

我正在使用Oracle“自含应用程序打包”工具为JavaFX8桌面应用程序创建.deb文件。生成的包文件可以在Ubuntu上毫无问题地安装，但随后应用程序无法运行。该文件的安装方式如下：

$ sudo dpkg -i vocabhunter-1.0.14.deb

$ /opt/VocabHunter/VocabHunter
VocabHunter Failed to locate JNI_CreateJavaVM
VocabHunter Failed to launch JVM

重要的是，我正在生成一个不包含JRE的包，经过调查，问题似乎与此有关。生成的文件/opt/vocabhunter/app/vocabhunter.cfg包含以下行：

app.runtime=

如果我编辑它并将路径添加到Java，程序启动时不会出现任何问题。作为一种解决办法，我建议在安装.debbundle之后，用户运行以下命令：

sudo sed -i "s|app.runtime=.*|app.runtime=$JAVA_HOME|g" /opt/VocabHunter/app/VocabHunter.cfg

然而，这使得用户的事情变得困难。有人知道如何修复JavaFX打包工具的配置以避免这个问题吗？

<project name="VocabHunter Packaging" basedir=""
         xmlns:fx="javafx:com.sun.javafx.tools.ant">
    <property environment="env"/>
    <property name="JAVA_HOME" value="${env.JAVA_HOME}"/>
    <target name="jfxbundle" description="Build the application bundle">
        <taskdef resource="com/sun/javafx/tools/ant/antlib.xml"
                 uri="javafx:com.sun.javafx.tools.ant"
                 classpath="${JAVA_HOME}/lib/ant-javafx.jar"/>
        <fx:deploy outdir="${basedir}/build"
                   nativeBundles="${packageType}">
            <fx:platform basedir=""/>
            <fx:application id="VocabHunterId"
                            name="VocabHunter"
                            mainClass="${mainClass}"
                            version="${version}"/>
            <fx:resources>
                <fx:fileset dir="${basedir}/build/libs"/>
            </fx:resources>
            <fx:info title="VocabHunter">
                <fx:association description="VocabHunter session"
                                extension="wordy"
                                mimetype="application/x-vnd.VocabHunterSession"
                                icon="${sessionIcon}"/>
            </fx:info>
            <fx:bundleArgument arg="icon"
                               value="${appIcon}"/>
            <fx:bundleArgument arg="mac.CFBundleVersion"
                               value="${version}"/>
            <fx:bundleArgument arg="launcher-cfg-format"
                               value="prop"/>
        </fx:deploy>
    </target>
</project>

我正在Ubuntu14.04上使用JDK1.8.0_92对此进行测试。

Answer 1

为了解决这个问题，您需要将jre_home设置为在没有绑定JRE的情况下运行一些本机JavaFX启动器。在Windows上，它查看注册表内部并搜索HKLM\software\JavaSoft\Java Runtime Environment\[CurrentVersion]\JavaHome。我找不到任何关于这件事的文件。

要解决此问题，您需要“更新”app.runtime-value作为安装时执行的postinst-script的一部分。类似这样的事情：

#!/bin/sh
# postinst script for APPLICATION_NAME
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <postinst> `abort-remove'
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package

case "$1" in
    configure)
        echo Adding shortcut to the menu
SECONDARY_LAUNCHERS_INSTALL
APP_CDS_CACHE
        xdg-desktop-menu install --novendor /opt/APPLICATION_FS_NAME/APPLICATION_LAUNCHER_FILENAME.desktop
FILE_ASSOCIATION_INSTALL

        if [ "SERVICE_HINT" = "true" ]; then
            echo Installing daemon
            cp /opt/APPLICATION_FS_NAME/APPLICATION_PACKAGE.init /etc/init.d/APPLICATION_PACKAGE

            if [ -x "/etc/init.d/APPLICATION_PACKAGE" ]; then
                update-rc.d APPLICATION_PACKAGE defaults

                if [ "START_ON_INSTALL" = "true" ]; then
                    if which invoke-rc.d >/dev/null 2>&1; then
                        invoke-rc.d APPLICATION_PACKAGE start
                    else
                        /etc/init.d/APPLICATION_PACKAGE start
                    fi
                fi
            fi

        fi

        if [ -f /etc/profile ]; then
            # load special environment variables
            . /etc/profile

            # remove stored value in case of dpkg-reconfigure
            RUNTIME_PATH_TO_SET=""

            if [ -z "$JRE_HOME" ]; then
                echo JRE_HOME is not set, checking for JAVA_HOME being set
                if [ -z "$JAVA_HOME" ]; then
                    echo JAVA_HOME is not set, checking for known locations

                    # look for known locations
                    KNOWN_JDK_DIRS="/usr/lib/jvm/java-8-oracle /usr/lib/jvm/java-8-openjdk-amd64 /usr/lib/jvm/java-8-openjdk-i386"
                    FOUND_JAVA_HOME=""

                    # Look for the right JVM to use (use the first one)
                    for potentialjdkdir in $KNOWN_JDK_DIRS; do
                        if [ -r "$potentialjdkdir/bin/java" -a -z "$FOUND_JAVA_HOME" ]; then
                            FOUND_JAVA_HOME="$potentialjdkdir"
                        fi
                    done

                    if [ -z "$FOUND_JAVA_HOME" ]; then
                        # still nothing found :(
                        echo Please make sure to have Java installed and JRE_HOME variable set before running APPLICATION_LAUNCHER_FILENAME
                    else
                        echo Updating runtime-settings using known location
                        RUNTIME_PATH_TO_SET="$FOUND_JAVA_HOME"
                    fi
                else
                    echo Updating runtime-settings using JAVA_HOME
                    # JAVA_HOME is set, use that value
                    RUNTIME_PATH_TO_SET="$JAVA_HOME"
                fi
            fi

            # always write runtime-location, as it might get removed again when user calls dpkg-reconfigure
            sed -i "s|app.runtime=.*|app.runtime=$RUNTIME_PATH_TO_SET|g" /opt/APPLICATION_FS_NAME/app/APPLICATION_LAUNCHER_FILENAME.cfg
        fi
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0

在使用javafx-maven-plugin或javafx-gradle-plugin时，将此脚本放在src/main/deploy/package/linux中，文件名为postinst以便由JavaPackager/bundler获取。

免责声明：我是javafx-maven-plugin的维护者和javafx-gradle-plugin的创建者

编辑：也更新了用于处理dpkg-reconfigure的脚本