無法在本地主機中運行Java Applet

Question

我正在嘗試在樹脂中運行的本地主機中運行Java applet。 我有一個JSP文件applet2.jsp，其中包含以下幾行：

Testing an applet.

<IMG SRC="/static/images/tabTrackerRollM.gif"><BR>

<APPLET NAME="tracker" CODE="com.my.package" ARCHIVE="/applets/my_applet.jar" WIDTH="100%" HEIGHT="300" VIEWASTEXT MAYSCRIPT>
<param name=updateUrl value="http://localhost/test/appletSample3.jsp">
<param name=bgColor value="0,0,0">
<param name=updateFrequency value=4000>
</APPLET>

但是，每當我嘗試在瀏覽器中運行小程序時，總是收到以下錯誤消息：

檢查Java控制台后，發現以下內容：

cache: Initialize resource manager: com.sun.deploy.cache.ResourceProviderImpl@9da1dd
basic: Added progress listener: sun.plugin.util.ProgressMonitorAdapter@1a0d62f
security: Expected Main URL: http://localhost/applet/my_applet.jar.jar
basic: Plugin2ClassLoader.addURL parent called for http://localhost/applet/my_applet.jar
network: Cache entry not found [url: http://localhost/applet/my_applet.jar, version: null]
network: Connecting http://localhost/applet/my_applet.jar with proxy=DIRECT
network: Connecting http://localhost:80/ with proxy=DIRECT
java.io.FileNotFoundException: http://localhost/applet/my_applet.jar
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at sun.plugin.PluginURLJarFileCallBack.downloadJAR(Unknown Source)
    at sun.plugin.PluginURLJarFileCallBack.access$000(Unknown Source)
    at sun.plugin.PluginURLJarFileCallBack$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.plugin.PluginURLJarFileCallBack.retrieve(Unknown Source)
    at sun.net.www.protocol.jar.URLJarFile.retrieve(Unknown Source)
    at sun.net.www.protocol.jar.URLJarFile.getJarFile(Unknown Source)
    at sun.net.www.protocol.jar.JarFileFactory.get(Unknown Source)
    at sun.net.www.protocol.jar.JarURLConnection.connect(Unknown Source)
    at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(Unknown Source)
    at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFileInternal(Unknown Source)
    at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader.getJarFile(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader.access$1000(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader.ensureOpen(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath$JarLoader.<init>(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
    at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader$2.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.plugin2.applet.Plugin2ClassLoader.findClassHelper(Unknown Source)
    at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

它基本上說my_applet.jar丟失了。 但是，當我嘗試通過瀏覽器指向http：//localhost/applet/my_applet.jar來訪問它時，它實際上存在：

我還嘗試去Java.com檢查我是否有最新的Java：

我在以下平台上： 操作系統： Windows 7（64） Java： JDK 1.7（64）

我還清除了控制面板中的Java Applet緩存，將瀏覽器安全性設置為中，並清除了瀏覽器緩存。

Answer 1

如果您嘗試對applet Jar進行簽名，則必須在瀏覽器上運行applet之前對其進行簽名。 這是簽名命令。

您應該在命令提示符下位於同一目錄中。

1.keytool -genkey -keyalg rsa -alias m4key  //m4key unique key
2.keytool -export -alias m4key -file bmcert.crt   //bmcert.crt certificate name
3.jar tvf Jarname.jar verify jar
4.jarsigner Jarname.jar m4key
5.jarsigner -verify -verbose -certs JarnameJarname.jar