public Boolean judgeTableIsExit(String tableName) {
   Connection conn = null;
   ResultSet rs = null;
   try {
     String[] types = {"TABLE"};
     conn = SessionFactoryUtils.getDataSource(getSession().getSessionFactory()).getConnection();
     DatabaseMetaData dbMetaData = conn.getMetaData();
     rs =
         dbMetaData.getTables(
             null,
             null,
             DbTableUtil.getDataType(getSession()).equals("ORACLE")
                 ? tableName.toUpperCase()
                 : tableName,
             types);
     if (rs.next()) {
       return true;
     } else {
       return false;
     }
   } catch (SQLException e) {
     throw new RuntimeException();
   } finally { // 关闭连接
     try {
       if (rs != null) {
         rs.close();
       }
       if (conn != null) {
         conn.close();
       }
     } catch (SQLException e) {
       e.printStackTrace();
     }
   }
 }
 /**
  * 获取数据操作接口
  *
  * @return
  */
 private DbTableHandleI getTableUtil() {
   return DbTableUtil.getTableHandle(getSession());
 }