Mysql不能插入中文和中文显示乱码问题
1、my.ini文件
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
[mysqld]
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
# These are commonly set, remove the # and set as required.
basedir = D:\\App Data\\mysql-5.7.10-winx64
datadir = D:\\App Data\\mysql-5.7.10-winx64\\data
port = 3306
skip-grant-tables
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
join_buffer_size = 128M
sort_buffer_size = 2M
read_rnd_buffer_size = 2M
character-set-server=utf8
collation-server=utf8_general_ci
#STRICT_TRANS_TABLES: may lead unable to write chinese datas into db.
sql_mode=NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER
[client]
# set default port and character set.
port = 3306
default-character-set=utf8
# Add user and password.
user = admin
password = admin
2、Mysql不能插入中文数据
修改sql_mode的值如下，关键是去掉STRICT_TRANS_TABLES：
sql_mode=NO_ENGINE_SUBSTITUTION,NO_AUTO_CREATE_USER
3、Mysql中文显示乱码
在my.ini配置文件中已经将default-character-set和character-set-server改成了utf8，这会使新建的数据库和表默认使用utf8编码，但并不能解决原有数据表的中文乱码问题。因为在你创建的时候，它们已经使用了别的编码格式（也许是latin1）。所以要把它们使用的编码格式改为utf8或者gbk，乱码问题才能解决。方法一：
mysql> SET NAMES utf8;
这种方法在某些机器上有效，在我的电脑上并不生效，但也可以一试。
方法二：
1、修改数据库的编码格式
- 使用下面命令查看数据库编码格式：
show create database db_name; - 若编码格式不是utf8，修改编码格式：
alter database db_name default character set utf8 collate utf8_general_ci;
2、修改表的编码格式
- 查看表的编码格式：
show create table table_name;
- 修改表编码格式：
alter table table_name default character set utf8 collate utf8_general_ci;
3、修改表的编码格式时，列的编码格式会跟着改变。若列的编码格式没有变，则需要手动修改列的编码格式：
- 修改列编码格式：
alter table table_name change old_column_name new_column_name varchar(20) character set utf8 not null;
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