0.中文乱码
1.查看mysql中表结构
show create table log_data
charset为utf8，代码端：通过gorm修改 在创建表时候修改（这里在连接数据库时已经修改过了，但是没有修改成功）
//db为已经连接好的gorm数据
err := db.Set("gorm:table_options", "ENGINE=InnoDB DEFAULT CHARSET=utf8").CreateTable(&LogData{}).Error
2.再次查看
show create table table_name
已经修改成功
但是还是乱码。在本地获取数据库内容，可以正常显示，所以不是字符问题。
查看表中数据段
show variables like "%char%";
3.修改mysql配置文件
修改配置
#1.（容器创建的mysql）进入容器
cd /etc/mysql
#先下载vim编辑器，然后编辑
apt-get update
apt-get install vim
#编辑/etc/mysql/my.cnf
#mysql的配置文件如下
# Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# The MySQL Server configuration file.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
#log-error = /var/log/mysql/error.log
# By default we only accept connections from localhost
#bind-address = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
character_set_server=utf8
init_connect="SET NAMES utf8"
max_allowed_packet = 20M
[mysql]
default-character-set = utf8
[mysql.server]
default-character-set = utf8
[mysqld_safe]
default-character-set = utf8
[client]
default-character-set = utf8
当然也可以在外面编辑好
#宿主机复制到容器内 mysql为容器名称
docker cp /root/my.cnf mysql:/etc/mysql/my.cnf
#容器内复制到宿主机中
docker cp mysql:/etc/mysql/my.cnf /root/my.cnf
为什么要修改/etc/mysql/my.cnf的文件
我用docker创建mysql5.7时候/etc/mysql/路径下没有my.cnf,然后自己创建了my.cnf,修改后需要重启容器
4.查看修改后的mysql
查看表数据
已正常显示
