JRE 8u171无法使用Java Web Start脱机模式 [英] Java Web Start Offline mode not possible with JRE 8u171

问题描述

有人还会使用Java Web Start吗?好吧，我确实必须这样做.

Does anyone still uses Java Web Start? Well I certanly have to.

我有一个需要在联机和脱机模式下运行的应用程序.在线获取更新，但实际用例处于离线状态.

I have an application that needs to run in online and offline mode. Online for getting updates, but the actual use case is offline.

直到运行良好的jre8u161为止.但是使用当前的171和172更新时，该应用程序将无法以脱机模式启动.

Up to jre8u161 that worked fine. But with the current Updates 171 and 172 the application won't start in offline mode.

如果使用Java Cache Viewer将其强制为脱机模式，则会出现异常:

If I force it to offline mode with the Java Cache Viewer I get the exception:

com.sun.deploy.net.FailedDownloadException: Ressource kann nicht heruntergeladen werden. System ist offline. (Resource can not be downloaded. System is offline.)
    at com.sun.deploy.cache.ResourceProviderImpl.checkUpdateAvailable(Unknown Source)
    at com.sun.deploy.cache.ResourceProviderImpl.isUpdateAvailable(Unknown Source)
    at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
    at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
    at com.sun.deploy.model.ResourceProvider.getResource(Unknown Source)
    at com.sun.javaws.security.JNLPSignedResourcesHelper.checkSignedResourcesHelper(Unknown Source)
    at com.sun.javaws.security.JNLPSignedResourcesHelper.checkSignedResources(Unknown Source)
    at com.sun.javaws.Launcher.prepareResources(Unknown Source)
    at com.sun.javaws.Launcher.prepareAllResources(Unknown Source)
    at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
    at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
    at com.sun.javaws.Launcher.launch(Unknown Source)
    at com.sun.javaws.Main.launchApp(Unknown Source)
    at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
    at com.sun.javaws.Main.access$000(Unknown Source)
    at com.sun.javaws.Main$1.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

如果我以javaws -offline <jnlp-file>开头，则会收到消息离线状态下的应用程序"(不提供离线模式下的应用程序).

If I start it with javaws -offline <jnlp-file> I get the message "Anwedung im Offlinebetrieb nicht verfügbar" (Application in offline mode not available).

我使用此jnlp文件创建了一个最小的应用程序:

I created a minimal application with this jnlp-file:

<jnlp spec="7.0" codebase="<URL>" href="<jnlp-file>"
  <information>
    <title>Base Test</title>
    <offline-allowed/>
  </information>
  <security>
    <all-permissions/>
  </security>
  <resources>
    <jar href="<jar-file>"/>
  </resources>
  <application-desc main-class="test.BaseTest"/>
</jnlp>

但这也不会在离线模式下开始.

But this also won't start in offline mode.

我还能做什么?

推荐答案

这是JDK 8 171的已知错误 https://bugs.openjdk.java.net/browse/JDK-8203272

This is a know bug of JDK 8 171 https://bugs.openjdk.java.net/browse/JDK-8203272

这在更高版本的JAVA中已修复(可以使用Java 10在脱机模式下启动jnlp)

This is fixed in later version of JAVA (able to launch jnlp in offline mode with java 10 )

无法通过8-171 Java更新以离线模式启动JNLP.

There is no way to launch JNLP in off line mode with 8-171 java update.

桌面快捷键启动 解决的方法之一是(这只是一个hack) 1.创建2个不同的jnlp，一个用于Java 8-171，另一个用于在离线模式下为其他Java版本启动jnlp.

FOR DESKTOP SHORTCUT LAUNCH One of the work around would be(It is just a hack) 1. create 2 different jnlp one for java 8-171 and another for launch jnlp in offline mode for other java versions.

1. 创建一个启动器jnlp应用程序，该应用程序可在客户端本地上检测Java版本并启动相应的jnlp.

(我目前正在研究它，完成后将更新代码)

(I am current working on it will update code when done)

在JNLP中使用此配置

USE this config in JNLP

JAVA 8171

JAVA 8 171

          <offline-allowed/>
           <shortcut>
            <desktop/>
           </shortcut>

JAVA OTHER版本

JAVA OTHER version

          `<offline-allowed/>
           <shortcut online="false">
             <desktop/>
           </shortcut>`

这篇关于JRE 8u171无法使用Java Web Start脱机模式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！