spark无法导出jar包 有很多duplicate entry错

JAR 导出完成，但带有警告。请参阅“详细信息”以获取更多信息。
  已导出，但存在编译警告：/spark/src/java/org/jivesoftware/spark/component/FileDragLabel.java
  已导出，但存在编译警告：/spark/src/java/org/jivesoftware/spark/plugin/PluginClassLoader.java
  已导出，但存在编译警告：/spark/src/java/org/jivesoftware/spark/ui/ContactGroup.java
  已导出，但存在编译警告：/spark/src/plugins/sip/src/java/net/java/sipmack/sip/TransferProcessing.java
  已导出，但存在编译警告：/spark/src/plugins/sip/src/java/net/java/sipmack/sip/SipManager.java
  已导出，但存在编译警告：/spark/src/plugins/sip/src/java/net/java/sipmack/sip/CallProcessing.java
  已导出，但存在编译警告：/spark/src/plugins/sip/src/java/net/java/sipmack/sip/security/Credentials.java
  已导出，但存在编译警告：/spark/src/plugins/sip/src/java/net/java/sipmack/sip/simple/MessageProcessing.java
  已导出，但存在编译警告：/spark/src/plugins/sip/src/java/org/jivesoftware/sparkplugin/calllog/LogManager.java
  已导出，但存在编译警告：/spark/src/plugins/sip/src/java/org/jivesoftware/sparkplugin/ui/components/RoundLabel.java
  将 /spark/src/java/org/jivesoftware/AccountCreationWizard.java 写入 JAR duplicate entry: org/jivesoftware/AccountCreationWizard.java 时出现问题
  duplicate entry: org/jivesoftware/AccountCreationWizard.java
  将 /spark/src/java/org/jivesoftware/GSSAPIConfiguration.java 写入 JAR duplicate entry: org/jivesoftware/GSSAPIConfiguration.java 时出现问题
  duplicate entry: org/jivesoftware/GSSAPIConfiguration.java
  将 /spark/src/java/org/jivesoftware/LoginDialog.java 写入 JAR duplicate entry: org/jivesoftware/LoginDialog.java 时出现问题
  duplicate entry: org/jivesoftware/LoginDialog.java
  将 /spark/src/java/org/jivesoftware/LoginSettingDialog.java 写入 JAR duplicate entry: org/jivesoftware/LoginSettingDialog.java 时出现问题
  duplicate entry: org/jivesoftware/LoginSettingDialog.java
  将 /spark/src/java/org/jivesoftware/MainWindow.java 写入 JAR duplicate entry: org/jivesoftware/MainWindow.java 时出现问题
  duplicate entry: org/jivesoftware/MainWindow.java
  将 /spark/src/java/org/jivesoftware/MainWindowListener.java 写入 JAR duplicate entry: org/jivesoftware/MainWindowListener.java 时出现问题
  duplicate entry: org/jivesoftware/MainWindowListener.java
  将 /spark/src/java/org/jivesoftware/Restarter.java 写入 JAR duplicate entry: org/jivesoftware/Restarter.java 时出现问题
  duplicate entry: org/jivesoftware/Restarter.java
  将 /spark/src/java/org/jivesoftware/Spark.java 写入 JAR duplicate entry: org/jivesoftware/Spark.java 时出现问题
  duplicate entry: org/jivesoftware/Spark.java
  将 /spark/src/java/org/jivesoftware/SparkStartupListener.java 写入 JAR duplicate entry: org/jivesoftware/SparkStartupListener.java 时出现问题
  duplicate entry: org/jivesoftware/SparkStartupListener.java
  将 /spark/src/java/org/jivesoftware/launcher/Installer.java 写入 JAR duplicate entry: org/jivesoftware/launcher/Installer.java 时出现问题
  duplicate entry: org/jivesoftware/launcher/Installer.java
  将 /spark/src/java/org/jivesoftware/launcher/JiveClassLoader.java 写入 JAR duplicate entry: org/jivesoftware/launcher/JiveClassLoader.java 时出现问题
  duplicate entry: org/jivesoftware/launcher/JiveClassLoader.java
  将 /spark/src/java/org/jivesoftware/launcher/Startup.java 写入 JAR duplicate entry: org/jivesoftware/launcher/Startup.java 时出现问题
  duplicate entry: org/jivesoftware/launcher/Startup.java
  将 /spark/src/java/org/jivesoftware/other/ServerPropConfig.java 写入 JAR duplicate entry: org/jivesoftware/other/ServerPropConfig.java 时出现问题
  duplicate entry: org/jivesoftware/other/ServerPropConfig.java
  将 /spark/src/java/org/jivesoftware/resource/ConfigurationRes.java 写入 JAR duplicate entry: org/jivesoftware/resource/ConfigurationRes.java 时出现问题
  duplicate entry: org/jivesoftware/resource/ConfigurationRes.java
  将 /spark/src/java/org/jivesoftware/resource/Default.java 写入 JAR duplicate entry: org/jivesoftware/resource/Default.java 时出现问题
  duplicate entry: org/jivesoftware/resource/Default.java
  将 /spark/src/java/org/jivesoftware/resource/Res.java 写入 JAR duplicate entry: org/jivesoftware/resource/Res.java 时出现问题
  duplicate entry: org/jivesoftware/resource/Res.java
  将 /spark/src/java/org/jivesoftware/resource/SoundsRes.java 写入 JAR duplicate entry: org/jivesoftware/resource/SoundsRes.java 时出现问题
  duplicate entry: org/jivesoftware/resource/SoundsRes.java
  将 /spark/src/java/org/jivesoftware/resource/SparkRes.java 写入 JAR duplicate entry: org/jivesoftware/resource/SparkRes.java 时出现问题
  duplicate entry: org/jivesoftware/resource/SparkRes.java
  将 /spark/src/java/org/jivesoftware/resource/configuration.properties 写入 JAR duplicate entry: org/jivesoftware/resource/configuration.properties 时出现问题
  duplicate entry: org/jivesoftware/resource/configuration.properties
  将 /spark/src/java/org/jivesoftware/resource/default.properties 写入 JAR duplicate entry: org/jivesoftware/resource/default.properties 时出现问题
  duplicate entry: org/jivesoftware/resource/default.properties
  将 /spark/src/java/org/jivesoftware/resource/sounds.properties 写入 JAR duplicate entry: org/jivesoftware/resource/sounds.properties 时出现问题
  duplicate entry: org/jivesoftware/resource/sounds.properties
  将 /spark/src/java/org/jivesoftware/resource/spark.properties 写入 JAR duplicate entry: org/jivesoftware/resource/spark.properties 时出现问题
  duplicate entry: org/jivesoftware/resource/spark.properties
  将 /spark/src/java/org/jivesoftware/spark/ChatAreaSendField.java 写入 JAR duplicate entry: org/jivesoftware/spark/ChatAreaSendField.java 时出现问题
  duplicate entry: org/jivesoftware/spark/ChatAreaSendField.java
  将 /spark/src/java/org/jivesoftware/spark/ChatManager.java 写入 JAR duplicate entry: org/jivesoftware/spark/ChatManager.java 时出现问题
  duplicate entry: org/jivesoftware/spark/ChatManager.java
  将 /spark/src/java/org/jivesoftware/spark/ChatNotFoundException.java 写入 JAR duplicate entry: org/jivesoftware/spark/ChatNotFoundException.java 时出现问题
  duplicate entry: org/jivesoftware/spark/ChatNotFoundException.java
  将 /spark/src/java/org/jivesoftware/spark/DataManager.java 写入 JAR duplicate entry: org/jivesoftware/spark/DataManager.java 时出现问题
  duplicate entry: org/jivesoftware/spark/DataManager.java
  将 /spark/src/java/org/jivesoftware/spark/NativeHandler.java 写入 JAR duplicate entry: org/jivesoftware/spark/NativeHandler.java 时出现问题
  duplicate entry: org/jivesoftware/spark/NativeHandler.java
  将 /spark/src/java/org/jivesoftware/spark/NativeManager.java 写入 JAR duplicate entry: org/jivesoftware/spark/NativeManager.java 时出现问题
  duplicate entry: org/jivesoftware/spark/NativeManager.java
  将 /spark/src/java/org/jivesoftware/spark/PluginManager.java 写入 JAR duplicate entry: org/jivesoftware/spark/PluginManager.java 时出现问题
  duplicate entry: org/jivesoftware/spark/PluginManager.java
  将 /spark/src/java/org/jivesoftware/spark/PresenceManager.java 写入 JAR duplicate entry: org/jivesoftware/spark/PresenceManager.java 时出现问题
  duplicate entry: org/jivesoftware/spark/PresenceManager.java
  将 /spark/src/java/org/jivesoftware/spark/SessionManager.java 写入 JAR duplicate entry: org/jivesoftware/spark/SessionManager.java 时出现问题
  duplicate entry: org/jivesoftware/spark/SessionManager.java
  将 /spark/src/java/org/jivesoftware/spark/SoundManager.java 写入 JAR duplicate entry: org/jivesoftware/spark/SoundManager.java 时出现问题
  duplicate entry: org/jivesoftware/spark/SoundManager.java
  将 /spark/src/java/org/jivesoftware/spark/SparkManager.java 写入 JAR duplicate entry: org/jivesoftware/spark/SparkManager.java 时出现问题
  duplicate entry: org/jivesoftware/spark/SparkManager.java
  将 /spark/src/java/org/jivesoftware/spark/UserManager.java 写入 JAR duplicate entry: org/jivesoftware/spark/UserManager.java 时出现问题
  duplicate entry: org/jivesoftware/spark/UserManager.java
  将 /spark/src/java/org/jivesoftware/spark/Workspace.java 写入 JAR duplicate entry: org/jivesoftware/spark/Workspace.java 时出现问题
  duplicate entry: org/jivesoftware/spark/Workspace.java
  将 /spark/src/java/org/jivesoftware/spark/component/AutoCompleteDocument.java 写入 JAR duplicate entry:  --------------------编程问答-------------------- 我也是遇到如此问题啊，肯求解答。 --------------------编程问答-------------------- "這通常是你取用 resource 的方式不對，比如說你是以指定"檔案"路徑的方式存取圖檔，可改用 Class - getResource/getResourceAsStream method 來存取，這樣子你需要的剩 .class file 與 resource file 的相對位置(無論兩者是在檔案系統或是兩者接包在 jar 裡)。 "

从别的网站转来的，看看是不是这个原因啊。

补充：Java ,  Java相关