weblogic.common.ResourceException: Could not create pool connection. The DBMS driver exception was: Io 异常: The Network Adapter could not establish the

在配置weblogic的数据源时，提示一下信息：

Home > Summary of Deployments > Summary of JDBC Data Sources:
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  An error occurred during activation of changes, please see the log for details. 
  weblogic.application.ModuleException: 
  weblogic.common.ResourceException: Could not create pool connection. The DBMS driver exception was: Io 异常: The Network Adapter could not establish the connection

解决：主要是我在配置数据源时没有把Oracle的服务启动造成的。