mac 設置 MySQL 數據庫默認編碼（字符集）為 UTF-8
鑒於有些剛接觸 MySQL 數據庫的人，經常會碰到數據庫中文顯示的問題，MySQL 數據庫剛安裝時默認編碼是 latin1，所以如果在數據庫建表的時候沒有設置
DEFAULT CHARSET=utf8的話，就會導致數據庫無法設置或顯示中文的問題，下面給出在 Mac 下將 MySQL 的默認編碼改為 UTF-8。
查看自己的 MySQL 的編碼方式
- 先連接 MySQL 數據庫 ，在終端輸入以下命令，回車后輸入 MySQL 的密碼。
/usr/local/mysql/bin/mysql -u root -p
復制代碼- 然后輸入以下命令查看自己的 MySQL 的編碼方式。
show variables like '%char%';
復制代碼
修改 MySQL 的默認編碼
- 進入到
/usr/local/mysql/support-files目錄，找到my-default.cnf文件，將其復制到桌面上，重命名為my.cnf。
- 右鍵桌面上的
my.cnf文件，打開方式選擇文本編輯，然后將全部內容替換為下面代碼。
# Example MySQL config file for small systems.
#
# This is for a system with little memory (<= 64M) where MySQL is only used
# from time to time and it's important that the mysqld daemon
# doesn't use much resources.
#
# 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]
default-storage-engine=INNODB
character-set-server=utf8
collation-server=utf8_general_ci
port = 3306
socket = /tmp/mysql.sock
skip-external-locking
key_buffer_size = 16K
max_allowed_packet = 1M
table_open_cache = 4
sort_buffer_size = 64K
read_buffer_size = 256K
read_rnd_buffer_size = 256K
net_buffer_length = 2K
thread_stack = 128K
# 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
# (using the "enable-named-pipe" option) will render mysqld useless!
#
#skip-networking
server-id = 1
# Uncomment the following if you want to log updates
#log-bin=mysql-bin
# binary logging format - mixed recommended
#binlog_format=mixed
# Causes updates to non-transactional engines using statement format to be
# written directly to binary log. Before using this option make sure that
# there are no dependencies between transactional and non-transactional
# tables such as in the statement INSERT INTO t_myisam SELECT * FROM
# t_innodb; otherwise, slaves may diverge from the master.
#binlog_direct_non_transactional_updates=TRUE
# 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
[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M
[mysqlhotcopy]
interactive-timeout
復制代碼- 將修改后的文件
my.cnf復制到/etc目錄下。
- 重啟 MySQL 數據庫就 ok 了。
