我使用的是通过JWS(Java Web Start)部署的applet。这个applet包含一些本机功能:JNA。用户32、内核32和Gdi32。当我通过JWS启动applet时,会得到以下结果:
basic: LD - All JAR files signed: file:/C:/JavaApplication6/dist/launch.jnlp
basic: passing security checks; secureArgs:false, allSigned:false
basic: continuing launch in this VM
network: LDUpdater: started background update check
basic: JNLP2ClassLoader.findClass: winToJnaApi.NewApplet: try again ..
basic: JNLP2ClassLoader.getPermissions() ..
basic: Plugin2ClassLoader.getPermissions CeilingPolicy allPerms
security: JAVAWS AppPolicy Permission requested for: file:/C:/JavaApplication6/dist/JavaApplication6.jar
basic: JNLP2ClassLoader.getPermissions() X
basic: Applet loaded.
basic: Applet resized and added to parent container
basic: PERF: AppletExecutionRunnable - applet.init() BEGIN ; jvmLaunch dt 194323 us, pluginInit dt 462062 us, TotalTime: 656385 us
basic: JNLP2ClassLoader.findClass: winToJnaApi.APIManipulation: try again ..
basic: JNLP2ClassLoader.findClass: winToJnaApi.User32Extended: try again ..
basic: JNLP2ClassLoader.findClass: com.sun.jna.win32.StdCallLibrary$StdCallCallback: try again ..
basic: JNLP2ClassLoader.getPermissions() ..
basic: Plugin2ClassLoader.getPermissions CeilingPolicy allPerms
security: JAVAWS AppPolicy Permission requested for: file:/C:/JavaApplication6/dist/lib/jna.jar
basic: JNLP2ClassLoader.getPermissions() X
basic: JNLP2ClassLoader.findClass: com.sun.jna.Callback: try again ..
basic: JNLP2ClassLoader.findClass: com.sun.jna.win32.StdCall: try again ..
basic: JNLP2ClassLoader.findClass: com.sun.jna.AltCallingConvention: try again ..
basic: JNLP2ClassLoader.findClass: com.sun.jna.Library: try again ..
basic: JNLP2ClassLoader.findClass: com.sun.jna.Native: try again ..
basic: JNLP2ClassLoader.findClass: com.sun.jna.Callback$UncaughtExceptionHandler: try again ..
basic: JNLP2ClassLoader.findClass: com.sun.jna.Native$3: try again ..
这很奇怪,对吧?如果我用jarsigner检查我的jar,它们似乎都被签名了(我使用Netbeans的自动签名,但即使我手动签名也不起作用)。由于我对applet和JWS技术还很陌生,我想知道是否再试一次。。。意味着JNLP找不到合适的类。
更奇怪的是,如果我在applet中定义了一个本机方法,例如,当单击applet上的按钮时,它会给我一个Windows消息框,如果我单击applet上的按钮,它就会工作,但是如果我试图通过javascript调用同一个函数,它就会失败。这是我的.jnlp文件:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<jnlp codebase="file:/C:/JavaApplication6/dist/" href="launch.jnlp" spec="1.0+">
<information>
<title>JavaApplication6</title>
<description>blalbla</description>
<description kind="short">JavaApplication6</description>
</information>
<update check="background"/>
<security>
<all-permissions/>
</security>
<resources>
<j2se java-vm-args="-Djava.security.policy=applet.policy" version="1.5+"/>
<jar href="JavaApplication6.jar" main="true"/>
<jar href="lib/jna.jar"/>
<jar href="lib/platform.jar"/>
</resources>
<applet-desc height="300" main-class="winToJnaApi.NewApplet" name="JavaApplication6" width="300">
</applet-desc>
</jnlp>
根据一些信息,我发现我应该自己将jna.jar的user32_x86目录转换为jar,并将其作为nativelib-ref包含在我的jnlp中,但它不起作用。此外,尝试用doPrivileged包装对applet中本机函数的每个调用也不起作用。
任何帮助都将不胜感激