In the Tomcat hierarchy of class loaders shown in Figure 1, for instance, classes loaded by the Common class loader will never be able to directly access (by name) classes loaded by a Web application.
例如，在图1显示的Tomcat类装入器层次结构中，由common类装入器装入的类决不能(根据名称)直接访问由Web应用程序装入的类。
By default, you configure a UserDatabaseRealm in Tomcat, enabling you to authenticate a user before letting them access the store.
缺省情况下，您在Tomcat中配置一个UserDatabaseRealm，从而使您能够在允许用户访问商店之前对他们进行身份验证。
This should be something that a developer can just access via a plugin from Eclipse or Netbeans or IDE of their choice, which means they can configure Derby and Tomcat directly from the IDE.
开发者应该可以通过Eclipse或者Netbeans或者他们选择的某个IDE的插件来访问Derby和Tomcat，这意味着开发者可以直接从ide中配置Derby和Tomcat。
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