tomcat配置项目初始化参数

经常是一个项目要在多个环境下部署，有些参数需要经常改变，如数据源连接参数。如果把参数配置在服务器上如tomcat上，就不需要经常修改了。

 

  path=""   reloadable="false" >

        

        

                      

 

 

在applicationContext.xml获取方式如下：

         destroy-method="close">

        

        

        

        

        

        

        

        

        

        

 

 

原因如下：

Context Parameters

 

    You can configure named values that will be made visible to the web application as servlet context initialization parameters by nesting elements inside this element. For example, you can create an initialization parameter like this:

                      

            

 

   

      ...

     

             override="false"/>

      ...

   

 

    This is equivalent to the inclusion of the following element in the web application deployment descriptor (/WEB-INF/web.xml):

                      

  

      companyName

      My Company, Incorporated

   

 

    but does not require modification of the deployment descriptor to customize this value.

 

 

 

Spring Expression Language (SpEL)可参考链接如下：