Fixed: mysql emoji issue

doc/db/tables_xxl_job.sql

 # XXL-JOB v2.1.1-SNAPSHOT
 # Copyright (c) 2015-present, xuxueli.
 
-CREATE database if NOT EXISTS `xxl_job` default character set utf8 collate utf8_general_ci;
+CREATE database if NOT EXISTS `xxl_job` default character set utf8mb4 collate utf8mb4_general_ci;
 use `xxl_job`;
 
 
   `trigger_last_time` bigint(13) NOT NULL DEFAULT '0' COMMENT '上次调度时间',
   `trigger_next_time` bigint(13) NOT NULL DEFAULT '0' COMMENT '下次调度时间',
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE TABLE `xxl_job_log` (
   `id` bigint(20) NOT NULL AUTO_INCREMENT,
   PRIMARY KEY (`id`),
   KEY `I_trigger_time` (`trigger_time`),
   KEY `I_handle_code` (`handle_code`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE TABLE `xxl_job_logglue` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `add_time` timestamp NULL DEFAULT NULL,
   `update_time` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP,
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE TABLE `xxl_job_registry` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
   PRIMARY KEY (`id`),
   KEY `i_g_k_v` (`registry_group`,`registry_key`,`registry_value`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE TABLE `xxl_job_group` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `address_type` tinyint(4) NOT NULL DEFAULT '0' COMMENT '执行器地址类型：0=自动注册、1=手动录入',
   `address_list` varchar(512) DEFAULT NULL COMMENT '执行器地址列表，多地址逗号分隔',
   PRIMARY KEY (`id`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE TABLE `xxl_job_user` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `permission` varchar(255) DEFAULT NULL COMMENT '权限：执行器ID列表，多个逗号分割',
   PRIMARY KEY (`id`),
   UNIQUE KEY `i_username` (`username`) USING BTREE
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 CREATE TABLE `xxl_job_lock` (
   `lock_name` varchar(50) NOT NULL COMMENT '锁名称',
   PRIMARY KEY (`lock_name`)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
 
 INSERT INTO `xxl_job_group`(`id`, `app_name`, `title`, `order`, `address_type`, `address_list`) VALUES (1, 'xxl-job-executor-sample', '示例执行器', 1, 0, NULL);