谁看一下我的spring事务为什么不起作用？？？速度

Question

接口：
public interface StuDao { public void insert();
public void delete();
}
public interface StuSer { public void update();
}
实现：
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import com.test.spring.interf.StuDao;
public class DaoImpl extends JdbcDaoSupport  implements StuDao {
public void delete() {
          JdbcTemplate jt= this.getJdbcTemplate();
String sql1 = "delete from student1 where id=1";
jt.update(sql1);
}
public void insert() {
          JdbcTemplate jt= this.getJdbcTemplate();
String sql = "insert into student2 values (1,'jack','dd')";//这句话会出错
jt.update(sql);
}
}
public class StuSerImpl {
private DaoImpl dao;
public void update() {
            try{
                this.dao.delete();
                this.dao.insert();
            }catch(Exception e){
               System.out.println("stuSerImpl-----"+e);
            }
}
public DaoImpl getDao() {
return dao;
}
public void setDao(DaoImpl dao) {
this.dao = dao;
}
}
action：
public void setStuSerImpl(StuSerImpl stuSerImpl) {
    this.stuSerImpl = stuSerImpl;
  }
  public StuSerImpl getStuSerImpl() {
    return this.stuSerImpl;
  }
  private StuSerImpl stuSerImpl;
  public ActionForward execute(ActionMapping mapping, ActionForm form,
                               HttpServletRequest request,
                               HttpServletResponse response) {
    DForm dForm = (DForm) form; // TODO Auto-generated method stub
    try{
      stuSerImpl.update();
    }catch(Exception e){
      System.out.println("-------------"+e);
    }
    return null;
  }
}
struts-config.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://struts.apache.org/dtds/struts-config_1_1.dtd">
<struts-config>
<form-beans>
    <form-bean name="dForm" type="com.test.spring.struts.form.DForm" />
</form-beans>
<action-mappings> 
<action
      attribute="dForm"
      name="dForm"
      path="/d"
      scope="request"     type="org.springframework.web.struts.DelegatingActionProxy" />
</action-mappings>
  <message-resources parameter="ApplicationResources" />
  <plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">
    <set-property property="contextConfigLocation" value="/WEB-INF/applicationContext.xml"/>
  </plug-in>
</struts-config>
applicationContext.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
  <!--<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
    <property name="jndiName">
      <value>**</value>
    </property>
  </bean>-->
  <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" singleton="true">
    <property name="driverClassName">
      <value>oracle.jdbc.driver.OracleDriver</value>
    </property>
    <property name="url">
      <value>jdbc:oracle:thin:@****:**</value>
    </property>
    <property name="username">
      <value>**</value>
    </property>
    <property name="password">
      <value>**</value>
    </property>
  </bean>
  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource">
      <ref local="dataSource"/>
    </property>
  </bean>
  <bean id="sdao" class="com.test.spring.impl.DaoImpl">
    <property name="dataSource">
      <ref local="dataSource"/>
    </property>
  </bean>
  <bean id="stuimp" class="com.test.spring.impl.StuSerImpl">
    <property name="dao">
      <ref local="sdao"/>
    </property>
  </bean>
  <bean name="/d" class="com.test.spring.struts.action.DAction" singleton="false">
    <property name="stuSerImpl">
      <ref local="stuimp"/>
    </property>
  </bean>
  <bean id="baseTxProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" lazy-init="true">
    <property name="transactionManager">
      <ref bean="transactionManager"/>
    </property>
    <property name="target">
      <ref bean="sdao"/>
    </property>
    <property name="transactionAttributes">
      <props>
        <prop key="de*">PROPAGATION_REQUIRED</prop>
      </props>
    </property>
  </bean>
</beans>