JAR組件與EAR有何不同？ （應用服務器）

Question

JAR與EAR文件相對於EJB的distinction是什麼？ Glassfish的幫助說：

thufir@doge:~$ 
thufir@doge:~$ GlassFish_Server/bin/asadmin deploy --help 

...

 --type 
      The packaging archive type of the component that is being deployed. 
      Possible values are as follows: 

      car 
       The component is packaged as a CAR file. 

      ear 
       The component is packaged as an EAR file. 

      ejb 
       The component is an EJB packaged as a JAR file. 

      osgi 
       The component is packaged as an OSGi bundle. 

      rar 
       The component is packaged as a RAR file. 

      war 
       The component is packaged as a WAR file. 

因此，一個EJB可以打包成一個文件JAR？什麼是功能差異？具體來說，EAR組件可以做什麼JAR不能？

Answer 1

EAR -耳朵文件基本上旨在包含完整的企業應用程序。它包含構成特定Java EE應用程序的所有組件。企業應用程序被定義爲.jar文件，資源，類和多個Web應用程序的集合.JAR文件封裝了一個或多個Java類，清單和描述符。 Jar文件基本上是爲了保存Java類，資源等的通用庫。而且，JAR文件是歸檔的最低級別。 JAR文件在Java EE中用於打包EJB和客戶端Java應用程序。