背景：Tomcat啟動時，從外部啟動是正常的，但從eclipse啟動就會有下面的異常
2009/11/02 10:52:25 org.apache.struts.action.ActionServlet initModuleDataSources
SEVERE: Initializing application data source org.apache.struts.action.DATA_SOURCE
Something unusual has occured to cause the driver to fail. Please report this exception:
Exception: java.security.AccessControlException: access denied
(java.net.SocketPermission 172.28.139.113:5432 connect,resolve)
Stack Trace:
java.security.AccessControlException: access denied (java.net.SocketPermission 172.28.139.113:5432 connect,resolve)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
at java.security.AccessController.checkPermission(AccessController.java:427)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
......
為了這個
java.security.AccessControlException擺弄半天也沒解決。
秉承"知之為知之，不知google之"的原則，從網上找原因，還是eclipse的Tomcat參數設置不對。
進入：Window ->Preference ->Tomcat，在設置Tomcat路徑的下面有個復選框"使用security manager啟動Tomcat"，把他設置成未選中狀態。原來是安全權限不夠。
以上。