Question

它给了我这个错误。

MissingFieldException[ The following required field is missing from the launch file: <jnlp>]
    at com.sun.javaws.jnl.XMLFormat.parse(Unknown Source)
    at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
    at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
    at com.sun.javaws.jnl.LaunchDescFactory._buildDescriptor(Unknown Source)
    at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
    at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
    at sun.plugin2.applet.JNLP2Manager.initialize(Unknown Source)
    at sun.plugin2.main.client.PluginMain.initManager(Unknown Source)
    at sun.plugin2.main.client.PluginMain.access$200(Unknown Source)
    at sun.plugin2.main.client.PluginMain$2.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:744)
Error while initializing manager: MissingFieldException[ The following required field is missing from the launch file: <jnlp>], bail out

对我来说更奇怪的是它有效如果我手动打开html文件，但如果我在我的django应用程序中使用此文件则无效。

所有文件均已在IDEA 13 comminity edition

中创建

<html><head>
  <SCRIPT src="http://java.com/js/dtjava.js"></SCRIPT>
<script>
    function launchApplication(jnlpfile) {
        dtjava.launch(            {
                url : 'Duplicate.jnlp'
            },
            {
                javafx : '2.2+'
            },
            {}
        );
        return false;
    }
</script>

<script>
    function javafxEmbed_Duplicate_id() {
        dtjava.embed(
            {
                id : 'Duplicate_id',
                url : 'Duplicate.jnlp',
                placeholder : 'javafx-app-placeholder',
                width : 600,
                height : 400
            },
            {
                javafx : '2.2+'
            },
            {}
        );
    }
    <!-- Embed FX application into web page once page is loaded -->
    dtjava.addOnloadCallback(javafxEmbed_Duplicate_id);
</script>

</head><body>
<h2>Test page for <b>Duplicate</b></h2>
  <b>Webstart:</b> <a href='Duplicate.jnlp' onclick="return launchApplication('Duplicate.jnlp');">click to launch this app as webstart</a><br><hr><br>

  <!-- Applet will be inserted here -->
  <div id='javafx-app-placeholder'></div>
</body></html>

那是html文件。

这是jnlp文件

<?xml version="1.0" encoding="utf-8"?>
<jnlp spec="1.0" xmlns:jfx="http://javafx.com" href="Duplicate.jnlp">
  <information>
    <title>Title</title>
    <vendor>vendor</vendor>
    <description>dfsdf</description>
    <offline-allowed/>
  </information>
  <resources>
    <jfx:javafx-runtime version="2.2+" href="http://javadl.sun.com/webapps/download/GetFile/javafx-latest/windows-i586/javafx2.jnlp"/>
  </resources>
  <resources>
    <j2se version="1.6+" href="http://java.sun.com/products/autodl/j2se"/>
    <jar href="Duplicate.jar" size="24699" download="eager" />
    <jar href="commons-codec-1.6.jar" size="232771" download="eager" />
    <jar href="commons-logging-1.1.3.jar" size="62050" download="eager" />
    <jar href="fluent-hc-4.3.3.jar" size="28696" download="eager" />
    <jar href="gson-2.2.4.jar" size="190418" download="eager" />
    <jar href="httpasyncclient-4.0.1.jar" size="157516" download="eager" />
    <jar href="httpasyncclient-cache-4.0.1.jar" size="33811" download="eager" />
    <jar href="httpclient-4.3.3.jar" size="589512" download="eager" />
    <jar href="httpclient-cache-4.3.3.jar" size="149800" download="eager" />
    <jar href="httpcore-4.3.2.jar" size="282269" download="eager" />
    <jar href="httpcore-nio-4.3.2.jar" size="316524" download="eager" />
    <jar href="httpmime-4.3.3.jar" size="37274" download="eager" />
    <jar href="jfxutils-0.3.jar" size="30866" download="eager" />
    <jar href="org.json-20120521.jar" size="40375" download="eager" />
    <jar href="unirest-java-1.3.8.jar" size="35161" download="eager" />
  </resources>
  <applet-desc  width="600" height="400" main-class="com.javafx.main.NoJavaFXFallback"  name="Duplicate" >
    <param name="requiredFXVersion" value="2.2+"/>
  </applet-desc>
  <jfx:javafx-desc  width="600" height="400" main-class="sample.Main"  name="Duplicate" />
  <update check="background"/>
</jnlp>

那是返回html的django视图

def chart(request):
    html = open('Duplicate.html')
    return HttpResponse(html)

JavaFX嵌入式（在浏览器中）代码无法启动

0 个答案: