mybatis 如果字符串是特殊符号要怎么处理？

    <update id="update">
        UPDATE d_table SET
        separator = #{separator, jdbcType=VARCHAR}
        WHERE id = #{id, jdbcType=BIGINT}
    </update>

如果 separator 传进来的是 ? 或 ! 这样的特殊符号，就报错。

### Error updating database.  Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'separator = '!'  
...