首先请确认正确安装好MySQL.

  1- 先配置环境变量path

    1.1 打开终端,输入: cd ~

      会进入~文件夹,

    1.2 然后输入:touch .bash_profile

      回车执行后,

    1.3 再输入:open -e .bash_profile

      会在TextEdit中打开这个文件(如果以前没有配置过环境变量,那么这应该是一个空白文档).

      如果有内容,请在结束符前输入,如果没有内容,请直接输入如下语句:

      export PATH=${PATH}:/usr/local/mysql/bin

      然后,保存,退出TextEdit(一定是退出),关闭终端并退出.

      此时应该可以直接用以下语句登入MySQL了

      >mysql -uroot -p

    1.4 关闭MySQL  !!!!(在系统偏好设置里面关闭MySQL)

  2- 重点来了!!!

    2.1 查看一下support-files文件夹(Finder下"前往文件夹";路径:/usr/local/mysql/support-files)

        里面有没有my-default.cnf或my.cnf文件...如果有则直接打开添加

      在[client] 在下面添加
      default-character-set=utf8 默认字符集为utf8 
      在[mysqld] 添加 
      default-character-set=utf8 默认字符集为utf8 
       init_connect='SET NAMES utf8' (设定连接mysql数据库时使用utf8编码,以让mysql数据库为utf8运行)
      修改好后,重新启动mysql查看当前数据编码格式。
 
>show variables like '%char%'; 
+--------------------------+----------------------------+ 
| Variable_name | Value | 
+--------------------------+----------------------------+ 
| character_set_client | utf8 | 
| character_set_connection | utf8 | 
| character_set_database | utf8 | 
| character_set_filesystem | binary | 
| character_set_results | utf8 | 
| character_set_server | utf8 | 
| character_set_system | utf8 | 
| character_sets_dir | /usr/share/mysql/charsets/ | 
 +--------------------------+----------------------------+

    若终端出现如上样式则OK了,否则继续往下看:

    2.2 support-files文件夹里面没有my-default.cnf或my.cnf文件,那么就要在/etc下新建my.cnf

      $ cd /etc

      $ sudo vim my.cnf

    2.3 进行完上步操作后会进入vim模式,此时复制(***文本)的内容粘贴进去,,(不包含   ***文本 );

    2.4 粘贴成功后注意看vim的第一行"#"有没有丢掉(本人就丢过~~哈哈~),都OK的话点esc退出编辑,

      :wq!     --保存后强制退出.[附几个编辑命令:dd   删除光标所在行; dw   删除一个字(word); x   删除当前字符].

(***文本):

# Example MySQL config file for medium systems. 
#  
# This is for a system with little memory (32M - 64M) where MySQL plays  
# an important part, or systems up to 128M where MySQL is used together with  
# other programs (such as a web server)  
#  
# MySQL programs look for option files in a set of  
# locations which depend on the deployment platform.  
# You can copy this option file to one of those  
# locations. For information about these locations, see:  
# http://dev.mysql.com/doc/mysql/en/option-files.html  
#  
# In this file, you can use all long options that a program supports.  
# If you want to know which options a program supports, run the program  
# with the "--help" option.  
# The following options will be passed to all MySQL clients  
[client]
default-character-set=utf8
#password = your_password  
port = 3306  
socket = /tmp/mysql.sock  
# Here follows entries for some specific programs  
# The MySQL server  
[mysqld]
character-set-server=utf8
init_connect='SET NAMES utf8
port = 3306  
socket = /tmp/mysql.sock  
skip-external-locking  
key_buffer_size = 16M  
max_allowed_packet = 1M  
table_open_cache = 64  
sort_buffer_size = 512K  
net_buffer_length = 8K  
read_buffer_size = 256K  
read_rnd_buffer_size = 512K  
myisam_sort_buffer_size = 8M  
character-set-server=utf8  
init_connect='SET NAMES utf8' 
# Don't listen on a TCP/IP port at all. This can be a security enhancement,  
# if all processes that need to connect to mysqld run on the same host.  
# All interaction with mysqld must be made via Unix sockets or named pipes.  
# Note that using this option without enabling named pipes on Windows  
# (via the "enable-named-pipe" option) will render mysqld useless!  
#  
#skip-networking

# Replication Master Server (default)  
# binary logging is required for replication  
log-bin=mysql-bin

# binary logging format - mixed recommended  
binlog_format=mixed

# required unique id between 1 and 2^32 - 1  
# defaults to 1 if master-host is not set  
# but will not function as a master if omitted  
server-id = 1

# Replication Slave (comment out master section to use this)  
#  
# To configure this host as a replication slave, you can choose between  
# two methods :  
#  
# 1) Use the CHANGE MASTER TO command (fully described in our manual) -  
# the syntax is:  
#  
# CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,  
# MASTER_USER=<user>, MASTER_PASSWORD=<password> ;  
#  
# where you replace <host>, <user>, <password> by quoted strings and  
# <port> by the master's port number (3306 by default).  
#  
# Example:  
#  
# CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,  
# MASTER_USER='joe', MASTER_PASSWORD='secret';  
#  
# OR  
#  
# 2) Set the variables below. However, in case you choose this method, then  
# start replication for the first time (even unsuccessfully, for example  
# if you mistyped the password in master-password and the slave fails to  
# connect), the slave will create a master.info file, and any later  
# change in this file to the variables' values below will be ignored and  
# overridden by the content of the master.info file, unless you shutdown  
# the slave server, delete master.info and restart the slaver server.  
# For that reason, you may want to leave the lines below untouched  
# (commented) and instead use CHANGE MASTER TO (see above)  
#  
# required unique id between 2 and 2^32 - 1  
# (and different from the master)  
# defaults to 2 if master-host is set  
# but will not function as a slave if omitted  
#server-id = 2  
#  
# The replication master for this slave - required  
#master-host = <hostname>  
#  
# The username the slave will use for authentication when connecting  
# to the master - required  
#master-user = <username>  
#  
# The password the slave will authenticate with when connecting to  
# the master - required  
#master-password = <password>  
#  
# The port the master is listening on.  
# optional - defaults to 3306  
#master-port = <port>  
#  
# binary logging - not required for slaves, but recommended  
#log-bin=mysql-bin

# Uncomment the following if you are using InnoDB tables  
#innodb_data_home_dir = /usr/local/mysql/data  
#innodb_data_file_path = ibdata1:10M:autoextend  
#innodb_log_group_home_dir = /usr/local/mysql/data  
# You can set .._buffer_pool_size up to 50 - 80 %  
# of RAM but beware of setting memory usage too high  
#innodb_buffer_pool_size = 16M  
#innodb_additional_mem_pool_size = 2M  
# Set .._log_file_size to 25 % of buffer pool size  
#innodb_log_file_size = 5M  
#innodb_log_buffer_size = 8M  
#innodb_flush_log_at_trx_commit = 1  
#innodb_lock_wait_timeout = 50

[mysqldump]  
quick  
max_allowed_packet = 16M

[mysql]  
no-auto-rehash  
# Remove the next comment character if you are not familiar with SQL  
#safe-updates  
default-character-set=utf8

[myisamchk]  
key_buffer_size = 20M  
sort_buffer_size = 20M  
read_buffer = 2M  
write_buffer = 2M

[mysqlhotcopy]  
interactive-timeout

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