解决方法：使用resultSet.getString（）之前一定要调用resultSet.next()

 ResultSet resultSet = statement1.executeQuery();
        while (resultSet.next()){
            String username1 = resultSet.getString("username");
            int id1 = resultSet.getInt("id");
            String password2 = resultSet.getString("password");
            String name = resultSet.getString("name");
            int age1 = resultSet.getInt("age");
            logger.info("id:{},username:{},password:{},name:{},age:{}",id1,username1,password2,name,age1);
        }