请参阅问题。

查看此问题。我相信这是***的解决方案。您可以使用以下代码读取String变量：

See this question for reading variable values from JNDI. I believe that this is the best solution. You can read a String variable with this code:

Context initialContext = new InitialContext();
String myvar = (String) initialContext.lookup("java:comp/env/myvar");

以上代码适用于所有容器。在Tomcat中，您在conf / server.xml中声明以下内容：

The above code will work on all containers. In Tomcat you declare the following in conf/server.xml:

<GlobalNamingResources ...>
  <Environment name="myvar" value="..."
         type="java.lang.String" override="false"/>
</GlobalNamingResources>

以上将创建一个全局资源。还可以在应用程序的上下文中定义资源。在大多数容器中，JNDI资源可通过MBean管理控制台获得。其中一些提供了一个图形界面来编辑它们。在进行更改时，最多需要重新启动应用程序。

The above will create a global resource. It is also possible to define a resource in the context of application. In most containers the JNDI resources are available through a MBeans Management Console. Some of them offer a graphical interface to edit them. At most an application restart is needed, when a change is made.

如何定义和编辑JNDI资源是特定于容器的。配置程序/管理员的工作是应用适当的设置。

How JNDI resources are defined and edited is container specific. It is the job of the configurator/administrator to apply the appropriate settings.

这些是JNDI提供的好处：

These are the benefits offered by JNDI:

• 您可以在WAR / EAR文件中定义参数的默认值。


• 可以在容器中轻松配置参数。


• 修改参数值时无需重启容器。