http://tomcat.apache.org/tomcat-6.0-doc/api/org/apache/catalina/valves/JDBCAccessLogValve.html
conf/server.xml
<Host name="localhost" appBase="webapps"
unpackWARs="true" autoDeploy="true">
修改为:
unpackWARs="false" autoDeploy="false"
xmlValidation="false" xmlNamespaceAware="false">