‘\xF0\x9F\x8D\x8E\xE7\x8E...‘ for column ‘nick_name‘

1. 将表字段字符集设置成utf8mb4
2. 执行插入前执行：SET NAMES utf8mb4;
如：
SET NAMES utf8mb4;
INSERT test(Content) VALUES('～');

<insert id="insertOrUpdate">
        SET NAMES utf8mb4;
        INSERT INTO `wx_user`(`id`, `open_id`, `verified`, `verified_time`, `user_name`,
                              `gender`, `nick_name`, `phone_number`, `avatar`, `id_number`,
                              `platform`, `deleted`, `create_user`, `create_time`,
                              `update_user`, `update_time`)
        VALUES
            (
                #{item.id},#{item.openId},#{item.verified},#{item.verifiedTime},#{item.userName},
                #{item.gender},#{item.nickName},#{item.phoneNumber},#{item.avatar},#{item.idNumber},
                #{item.platform},#{item.deleted},#{item.createUser},#{item.createTime},#{item.updateUser},
                #{item.updateTime}
            )
        on duplicate key UPDATE
        open_id = values(open_id),
        verified = values(verified),
        verified_time = values(verified_time),
        user_name = values(user_name),
        gender = values(gender),
        nick_name = values(nick_name),
        phone_number = values(phone_number),
        avatar = values(avatar),
        id_number = values(id_number),
        platform = values(platform),
        deleted = values(deleted),
        create_user = values(create_user),
        create_time = values(create_time),
        update_user = values(update_user),
        update_time = values(update_time);
    </insert>