hibernate sql 语句查询所有字段名

我不是女神ヾ 2023-10-18 00:01 153阅读 0赞

/*Statement statement = null;
            Connection disconnect = null;
            ResultSet resultSet = null;
            try {
                disconnect = getSession().disconnect();
                statement = disconnect.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
                resultSet = statement.executeQuery(sql);
                ResultSetMetaData metaData = resultSet.getMetaData();
                for (int i = 0; i < metaData.getColumnCount(); i++) {
                    System.out.println("获取到的数据ziduan字段名:" + metaData.getColumnName(i));
                }
            } catch (SQLException e) {
                e.printStackTrace();
            } finally {
                if (statement != null) {
                    try {
                        if (resultSet != null) {
                            resultSet.close();
                        }
                        statement.close();
                        disconnect.close();
                    } catch (SQLException e) {
                        e.printStackTrace();
                    }
                }
            }*/
    //        String[] namedParameters = getSession().createSQLQuery(sql).getNamedParameters();
    //        System.out.println("namedParameters = " + Arrays.toString(namedParameters));

以上代码应该可行,但是我用的时候包异常,好像是连接的问题,有知道原因的大神请指点一下.

String sql = "SELECT * FROM " + tableName;/* + " WHERE Recid=" + queryParameters*/
            List<Map<String, Object>> list = getSession().createSQLQuery(sql).setResultTransformer(Transformers.ALIAS_TO_ENTITY_MAP).list();
            System.out.println("获取到的数据list:" +list);

这三行代码可以输出list集合,key是字段名称,value是值 <正好是我想要的>

/*String sql = "SELECT * FROM " + tableName;
            List list = getSession().createSQLQuery(sql).list();
            for (int i = 0; i < list.size(); i++) {
                //这里要用Object[]接收查出来的list中每一条数据
                Object[] obj = (Object[]) list.get(i);
                System.out.println("获取到的数据:13" + Arrays.toString(obj));
            }*/

如果只是查询数据的话,以上几行代码即可.