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我想包括我的Java应用程序，我将它作为jar文件保存在Web浏览器中。我已经尝试了Java Web Start教程并创建了Java JNLP应用程序。我也遵循基于这里的教程：http://transvar.org/6112/WebStartAppInstruction.pdf下载后无法启动Java JNLP应用程序
我已经尝试了所有的步骤，但在我下载Launch.jnlp并尝试启动它的错误，如“无法启动应用程序”弹出。我点击了Details按钮来检查我做错了什么。
这里的错误（例外标签）：
com.sun.deploy.net.FailedDownloadException: Unable to load resource: file:/C:/Users/nurulazila/Documents/NetBeansProjects/fyp_steganalysis/dist/$$codebase/launch.jnlp
at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
at com.sun.javaws.Launcher.updateFinalLaunchDesc(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)
包装异常标签：
java.io.FileNotFoundException: C:\Users\nurulazila\Documents\NetBeansProjects\fyp_steganalysis\dist\$$codebase\launch.jnlp (The system cannot find the path specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source)
at com.sun.deploy.net.BasicHttpRequest.doGetRequestEX(Unknown Source)
at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
at com.sun.deploy.net.DownloadEngine.downloadResource(Unknown Source)
at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source)
at com.sun.javaws.Launcher.updateFinalLaunchDesc(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)
我的代码（Launch.jnlp）：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<jnlp codebase="$$codebase" href="launch.jnlp" spec="1.0+">
<information>
<title>fyp_steganalysis</title>
<vendor>nurulazila</vendor>
<homepage href="www.google.com"/>
<description>fyp_steganalysis</description>
<description kind="short">fyp_steganalysis</description>
</information>
<update check="always"/>
<resources>
<j2se version="1.7+"/>
<jar href="fyp_steganalysis.jar" main="true"/>
</resources>
<application-desc main-class="steganalysisUI">
</application-desc>
</jnlp>
Launch.HTML：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Test page for launching the application via JNLP</title>
</head>
<body>
<h3>Test page for launching the application via JNLP</h3>
<script src="http://java.com/js/deployJava.js"></script>
<script>
deployJava.createWebStartLaunchButton("launch.jnlp")
</script>
<!-- Or use the following link element to launch with the application -->
<!--
<a href="launch.jnlp">Launch the application</a>
-->
</body>
</html>
我真的很新Java JNLP。希望能在这里得到一些帮助。
问题是你的代码库。请注意，最近的jnlp规范版本不需要指定它。因此，删除jnlp中的codebase属性并将规范更改为7.0+可能会解决您的问题。 – assylias
@assylias我试过你的方法。当我点击Launch.jnlp本身时，应用程序弹出错误“应用程序被阻止......”。我想它必须与Java设置有关。但是，当我从浏览器下载“无法启动应用程序”再次弹出。我不知道现在该做什么。 – user3116040
您是否正在启动Java 7 JRE？当您遇到诸如“无法启动应用程序”等错误时，您应该有一个链接，如“更多信息”，其中包含有用的疑难解答信息。 – assylias