尝试使用jnlp部署Java applet

Question

我正在尝试使用jnlp部署applet

我的jnlp文件：

<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.6" codebase="http://localhost:8080/docRuleTool/appletjars/" href="dynamictree-applet.jnlp">
    <information>
        <title>dynamictree</title>
        <vendor>dynamic</vendor>
    </information>
    <resources>
        <j2se version="1.6" href="http://localhost:8080/docRuleTool/appletjars/" />
        <jar href="dynamictree.jar" main="true" />
        <jar href="prefuse.jar" main="true" />
    </resources>
    <applet-desc 
         name="dynamictree-applet"
         main-class="com.vaannila.utility.dynamicTreeApplet.class"
         width="1000"
         height="1000">
     </applet-desc>
     <update check="background"/>
</jnlp>

我的小程序代码：

<script src="http://www.java.com/js/deployJava.js"></script>
<script>
    var attributes = { id:'DynamicApplet', code:'jstojava.dynamicTreeApplet',} ;
    var parameters = {jnlp_href:'./appletjars/dynamictree-applet.jnlp'} ;
    deployJava.runApplet(attributes, parameters, '1.6');
</script>

我的javascript：

function showSelected(value){
alert("the value given from  "+value);  
DynamicApplet.dieasenameencode=value; 
}

我得到的错误：

execption: The application has requested a version of the JRE (version 1.6) that currently is not locally installed. Java Web Start is unable to automatically download and install the requested version. This JRE must be installed manually..
JNLPException[category: System Configuration : Exception: null : LaunchDesc: 
<jnlp spec="1.6" codebase="http://localhost:8080/docRuleTool/appletjars/" href="http://localhost:8080/docRuleTool/appletjars/dynamictree-applet.jnlp">
  <information>
    <title>dynamictree</title>
    <vendor>dynamic</vendor>
    <homepage href="null"/>
  </information>
  <update check="background" policy="always"/>
  <resources>
    <java href="http://localhost:8080/docRuleTool/appletjars/" version="1.6"/>
    <jar href="http://localhost:8080/docRuleTool/appletjars/dynamictree.jar" download="eager" main="true"/>
    <jar href="http://localhost:8080/docRuleTool/appletjars/prefuse.jar" download="eager" main="true"/>
  </resources>
  <applet-desc name="dynamictree-applet" main-class="com.vaannila.utility.dynamicTreeApplet.class" documentbase="http://localhost:8080/docRuleTool/" width="1000" height="1000"/>
</jnlp> ]
    at sun.plugin2.applet.JNLP2Manager.downloadJREResource(Unknown Source)
    at sun.plugin2.applet.JNLP2Manager.prepareLaunchFile(Unknown Source)
    at sun.plugin2.applet.JNLP2Manager.loadJarFiles(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Exception: JNLPException[category: System Configuration : Exception: null : LaunchDesc: 
<jnlp spec="1.6" codebase="http://localhost:8080/docRuleTool/appletjars/" href="http://localhost:8080/docRuleTool/appletjars/dynamictree-applet.jnlp">
  <information>
    <title>dynamictree</title>
    <vendor>dynamic</vendor>
    <homepage href="null"/>
  </information>
  <update check="background" policy="always"/>
  <resources>
    <java href="http://localhost:8080/docRuleTool/appletjars/" version="1.6"/>
    <jar href="http://localhost:8080/docRuleTool/appletjars/dynamictree.jar" download="eager" main="true"/>
    <jar href="http://localhost:8080/docRuleTool/appletjars/prefuse.jar" download="eager" main="true"/>
  </resources>
  <applet-desc name="dynamictree-applet" main-class="com.vaannila.utility.dynamicTreeApplet.class" documentbase="http://localhost:8080/docRuleTool/" width="1000" height="1000"/>
</jnlp> ]

Answer 1

问题在于此行：

<j2se version="1.6" href="http://localhost:8080/docRuleTool/appletjars/" />

Java Web Start将尝试从href属性中提供的URL下载Jre 1.6。 更正后的版本如下：

<j2se version="1.6" href="http://java.sun.com/products/autodl/j2se" />

可以在这里找到示例JNLP文件： 通过Java Web Start分发Swing应用程序