Question

Spring JdbcTemplate

The method queryForObject(String, Object[], RowMapper) in the type JdbcTemplate is not applicable for the arguments (String, GroupsDAOImpl.RowMappers, Serializable)
报这个异常
代码
public Groups findById(Serializable id) {
JdbcTemplate template = getJdbcTemplate();
String sql = "select * from t_user_groups where group_id = ?";
Groups groups = template.queryForObject(sql, newRowMappers(), id);//queryForObject出错
return null;
}

Answer 1

Object[] ob ={group_id};//group_id就是你where语句中的参数的值 多个参数用“，”隔开 你的参数要是放在了id这个对象中时 你个可以Object[] ob ={id.getGroupId()};//
Groups groups = template.queryForObject(sql,ob,new RowMappers());

Answer 2

GroupsDAOImpl.RowMappers, Serializable
这两个类型不匹配

解决办法用queryForMap最好。。