MySQL中的表情符号支持

我读了很多关于如何在MySQL中实现表情符号支持的文章，但是没有任何效果。

my.cnf：

[client]
default-character-set = utf8mb4
[mysqld]
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
character-set-client-handshake = FALSE
[mysql]
default-character-set = utf8mb4

测试：

mysql> SHOW VARIABLES WHERE Variable_name LIKE 'character\_set\_%' OR Variable_name LIKE 'collation%';
+--------------------------+--------------------+
| Variable_name            | Value              |
+--------------------------+--------------------+
| character_set_client     | utf8mb4            |
| character_set_connection | utf8mb4            |
| character_set_database   | utf8mb4            |
| character_set_filesystem | binary             |
| character_set_results    | utf8mb4            |
| character_set_server     | utf8mb4            |
| character_set_system     | utf8               |
| collation_connection     | utf8mb4_unicode_ci |
| collation_database       | utf8mb4_unicode_ci |
| collation_server         | utf8mb4_unicode_ci |
+--------------------------+--------------------+

我已经尝试过MyISAM和InnoDB。

这有什么问题？

尝试：

mysql> SELECT VERSION();
+-----------+
| VERSION() |
+-----------+
| 5.7.11    |
+-----------+
1 row in set (0.00 sec)

mysql> SET NAMES utf8mb4;
Query OK, 0 rows affected (0.00 sec)

mysql> DROP TABLE IF EXISTS `tbl_test`;
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE TABLE IF NOT EXISTS `tbl_test` (
    ->   `message` VARCHAR(100) DEFAULT NULL
    -> ) DEFAULT CHARSET=utf8mb4;
Query OK, 0 rows affected (0.00 sec)

mysql> INSERT INTO `tbl_test` (`message`)
    -> VALUES ('Hello ');
Query OK, 1 row affected (0.00 sec)

mysql> SELECT `message`
    -> FROM `tbl_test`;
+------------+
| message    |
+------------+
| Hello      |
+------------+
1 row in set (0.00 sec)