Java 弹簧MVC在蛇壳中返回

我遇到了麻烦，需要一些帮助。具体来说，我有一个定义如下的POJO：

private String uid;
private String userName;
private String firstName;
private String lastName;

我的刀看起来像：

@Override
public AAAUserCountDTO getUserCount(final String userName, final Date startDate, final Date endDate)
        throws BadParameterException {
    final String sql = "select uid, user_name, first_name, last_name from usage where user_name = :user_name and process_time >= :start_date and process_time < :end_date";

    final SqlParameterSource namedParameters = new MapSqlParameterSource().addValue("user_name", userName)
            .addValue("start_date", startDate).addValue("end_date", endDate);

    try {
        return jdbcTemplate.queryForObject(sql, namedParameters,
                new BeanPropertyRowMapper<DTO>(DTO.class).se);

    } catch (EmptyResultDataAccessException e) {
        throw new BadParameterException();
    }
}

我的回答是：

uid: 1234,
userName: "Bob",
firstName: "Bob",
lastName: "Hopkins",
etc...

作为POJO的一部分，我如何执行而不必告诉JSON属性符号中的每一个呢

---

谢谢

这行代码有助于：

@Override
public void onApplicationEvent(ObjectMapperConfigured event) {
    event.getObjectMapper().setPropertyNamingStrategy(PropertyNamingStrategy.CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES);        
}

@Override
public void onApplicationEvent(ObjectMapperConfigured event) {
    event.getObjectMapper().setPropertyNamingStrategy(PropertyNamingStrategy.CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES);        
}