一个HIBERNATE的问题，各位大侠帮我看哈子，谢了

报错：
exception java.lang.UnsupportedOperationException
org.apache.tomcat.dbcp.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:116)
org.apache.tomcat.dbcp.dbcp.BasicDataSource.getConnection(BasicDataSource.java:554)
org.hibernate.connection.DatasourceConnectionProvider.getConnection(DatasourceConnectionProvider.java:66)
org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:417)
org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:129)
org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:57)
org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1290)
TestHibernate.Save(TestHibernate.java:51)
RegeditServlet.doPost(RegeditServlet.java:21)
javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.23 logs.我的配置文件：server.xml
<?xml version="1.0" encoding="UTF-8"?>
<Server>
  <Listener className="org.apache.catalina.core.AprLifecycleListener"/>
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener"/>
  <Listener className="org.apache.catalina.storeconfig.StoreConfigLifecycleListener"/>
  <Listener className="org.apache.catalina.mbeans.ServerLifecycleListener"/>
  <GlobalNamingResources>
    <Environment
      name="simpleValue"
      type="java.lang.Integer"
      value="30"/>
    <Resource
auth="Container"
      name="jdbc/ye"
factory="org.apache.commons.dbcp.BasicDataSourceFactory"
 poolPreparedStatements="true"
efaultTransactionIsolation="1"
defaultAutoCommit="false"
      type="javax.sql.DataSource"
      maxActive="4"
      maxIdle="2"
      username="ye"
      maxWait="5000"
      driverClassName="oracle.jdbc.driver.OracleDriver"
      password="ye"
      url="jdbc:oracle:thin:@ye:1521:doorloca"/>
    <Resource
      auth="Container"
      description="User database that can be updated and saved"
      name="UserDatabase"
      type="org.apache.catalina.UserDatabase"
      pathname="conf/tomcat-users.xml"
      factory="org.apache.catalina.users.MemoryUserDatabaseFactory"/>
  </GlobalNamingResources>
  <Service
      name="Catalina">
    <Connector
        port="8081"
        redirectPort="8443"
        minSpareThreads="25"
        connectionTimeout="20000"
        maxSpareThreads="75"
        maxThreads="150">
    </Connector>
    <Connector
        port="8009"
        redirectPort="8443"
        protocol="AJP/1.3">
    </Connector>
    <Engine
        defaultHost="localhost"
        name="Catalina">
      <Realm className="org.apache.catalina.realm.UserDatabaseRealm"/>
      <Host
          appBase="webapps"
          name="localhost">
<context>
 <Resource
      name="jdbc/ye"
factory="org.apache.commons.dbcp.BasicDataSourceFactory"
 poolPreparedStatements="true"
efaultTransactionIsolation="1"
defaultAutoCommit="false"
      type="javax.sql.DataSource"
      maxActive="4"
      maxIdle="2"
      username="ye"
      maxWait="5000"
      driverClassName="oracle.jdbc.driver.OracleDriver"
      password="ye"
      url="jdbc:oracle:thin:@ye:1521:doorloca"/>
</context>
      </Host>
    </Engine>
  </Service>
</Server>
context.xml:
<?xml version="1.0" encoding="UTF-8"?>
<Context reloadable="true" crossContext="true">
 <!-- Default set of monitored resources -->
 <WatchedResource>WEB-INF/web.xml</WatchedResource>
 <!-- Uncomment this to disable session persistence across Tomcat restarts -->
 <!--
  <Manager pathname="" />
 -->
 <Resource name="jdbc/ye" auth="Container"
           type="javax.sql.DataSource"
           driverClassName="oracle.jdbc.OracleDriver"
           url="jdbc:oracle:thin:@127.0.0.1:1521:doorloca"
           username="ye"
           password="ye"
           maxActive="20"
           maxIdle="10"
           maxWait="-1"/>
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="localhost_DBTest_log." suffix=".txt" timestamp="true" />
<Valve className="org.apache.catalina.valves.AccessLogValve"
prefix="localhost_access_log." suffix=".txt" pattern="common" />
</Context>