JdbcTemplate RowMapper接口

Posted 2020-12-02 会飞的金鱼

JdbcTemplate调用queryXXX方法，其中通过BeanPropertyRowMapper实现类将获取的值封装到对象内。而BeanPropertyRowMapper是实现了RowMapper接口。

当pojo对象的属性与数据库中对应表的字段名不一致时，则需要自定RowMapper接口实现类，否则对象结果中的值为null或基本类型数据默认值。

    @Test
    public void queryAccount(){
        String sql="select id as ids,name as names,money as moneys from account where id=?";
        Account account = jdbcTemplate.queryForObject(sql, new RowMapper<Account>() {
            @Override
            public Account mapRow(ResultSet resultSet, int i) throws SQLException {
                Account account1=new Account();
                account1.setId(resultSet.getInt("ids"));
                account1.setName(resultSet.getString("names"));
                account1.setMoney(resultSet.getFloat("moneys"));
                return account1;
            }
        }, 18);
        System.out.println(account);
    }