registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it

小洪維尼

　　寒假时在家看视频学习ssh,第一次将它们整合在一起，就出了问题：
　　
　　

　　严重: The web application [/] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
　　2012-2-15 15:25:22 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
　　严重: The web application [/] appears to have started a thread named [Timer-0] but has failed to stop it. This is very likely to create a memory leak.
　　
　　
　　我用的是strut2.2.3+hibernate3+spring2.5.6+tomcat7.0.22+mysql5
　　
　　看tomcat的启动信息是，应用程序注册了jdbc驱动，但是结束时无法注销，tomcat于是为防止内存泄露，强制注销了，
　　网上说是DBCP的bug
　　
　　于是按https://issues.apache.org/jira/browse/DBCP-332上讲的
　　
　　另外写一个类，继承org.apache.commons.dbcp.BasicDataSource来注销jdbcimport java.sql.DriverManager;

import java.sql.SQLException;
import org.apache.commons.dbcp.BasicDataSource;
public class XBasicDataSource extends BasicDataSource
{
@Override
public synchronized void close() throws SQLException {
DriverManager.deregisterDriver(DriverManager.getDriver(url));
super.close();
}
}
　　于是问题终于解决了！不知还有没更好的方法？