Hibernate如何执行存储过程？

Hibernate如何执行存储过程？

@Override
public Boolean setVarValue(final String processInstanceId, final String varName,
      final String varValue) {
   return getHibernateTemplate().execute(new HibernateCallback<Boolean>() {
      @Override
      public Boolean doInHibernate(Session session) throws HibernateException{
         Connection conn = null;
         CallableStatement callable = null;
         boolean flag = false;
         try {
            conn = getConnection();
            callable = conn.prepareCall("{CALL PROCESS_WARN.set_var_value(?,?,?)}");
            callable.setString(1, processInstanceId);
            callable.setString(2, varName);
            callable.setString(3, varValue);
            callable.execute();
            flag = true;
         } catch (Exception e) {
            logger.error("execute procedure PROCESS_WARN.set_var_value mistakes !!!");
            e.printStackTrace();
         } finally {
            try {
               if (null != callable)
                  callable.close();
               if (null != conn)
                  conn.close();
               if (null != session)
                  session.close();
            } catch (SQLException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
            }
         }
         return flag;
      }
   });
}
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@Override
public Map<String, String> startProcess(final String warningFormId,
      final String operationClassKey, final String cityOrgId) {
   return getHibernateTemplate().execute(new HibernateCallback<Map<String,String>>() {
      @Override
      public Map<String,String> doInHibernate(Session session) throws HibernateException{
         Connection conn = null;
         CallableStatement callable = null;
         Map<String,String> ret = new HashMap<String,String>();
         try {
            conn = getConnection();
            callable = conn.prepareCall("{CALL PROCESS_WARN.START_PROCESS(?,?,?,?,?)}");
            callable.setString(1, operationClassKey);
            callable.setString(2, warningFormId);
            callable.setString(3, cityOrgId);
            callable.registerOutParameter(4, oracle.jdbc.OracleTypes.VARCHAR);
            callable.registerOutParameter(5, oracle.jdbc.OracleTypes.VARCHAR);
            callable.execute();
            ret.put("process_instance_id", callable.getObject(4).toString());
            ret.put("new_task_id_list", callable.getObject(5).toString());
         } catch (Exception e) {
            logger.error("execute procedure PROCESS_WARN.START_PROCESS mistakes !!!");
            e.printStackTrace();
            if(e.getMessage().indexOf("ORA-20012") != -1){
               String [] strTemp = e.getMessage().split("#");
               String msg = "未设置下一步骤的执行人!";
               if(strTemp.length > 1){
                  msg = strTemp[1];
               }
               throw new NoAssigneeException(msg);
            }
            
         } finally {
            try {
               if (null != callable)
                  callable.close();
               if (null != conn)
                  conn.close();
               if (null != session)
                  session.close();
            } catch (SQLException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
            }
         }
         return ret;
      }
   });
}