启动Derby连接时出现"SecurityException:sealed violation"

Question

我需要使用" org.apache.derby.drda.NetworkServerControl"类从我的java应用程序启动derby服务器.
当我尝试启动服务器时,它会抛出异常.

码:

NetworkServerControl server = null; 
server=new NetworkServerControl(InetAddress.getLocalHost(),1527,"user","123")
server.start(new PrintWriter(System.out));

错误:

Caused by: java.lang.SecurityException: sealing violation: package org.apache.derby.impl.store.raw.xact is sealed

谁能告诉我这个错误的原因？

Answer 1

您的类路径上可能有两次Derby类.在另一个jar存档中查找Derby类并仅使用它们一次.