最近安裝了mac osx lion系統，然後安裝了mysql5.5.16版本的數據庫進行開發，但是大家都知道，mysql的默認編碼是latin1，如果存儲中文的話就會出現亂碼，然後就狂google這個問題，但是一直都沒有解決，網上大部分的回答都是如下：
1.拷貝/usr/local/mysql/support-files下的任意一個*.cnf文件到/etc/my.cnf；
2.在my.cnf文件的［mysqld］和［client］後面添加一句default-character-set=utf8（或者是default_character_set=utf8）；
3.保存退出；
4.重新啟動mysql服務器就可以。
可是我試過好多次，這樣修改之後，mysql服務根本就啟動不了。
偶然的機會，我發現了一個關於在linux下配置mysql的編碼問題的方法，抱著試試看的態度，我進行了修改，發現真的可以用，因此發這篇博文希望裝mac的朋友不用再走彎路了。配置方法如下：
1.拷貝/usr/local/mysql/support-files下的任意一個*.cnf文件到/etc/my.cnf；
2.在my.cnf文件的［client］後面添加一句default-character-set=utf8（ 不是default_character_set=utf8[i][/i]，這個配置我沒有試過，不知道能不能成功），關鍵在這裡的配置，在［mysqld］後面添加如下三句：
default-storage-engine=INNODB
character-set-server=utf8
collation-server=utf8_general_ci；
3.保存退出；
4.重新啟動mysql服務器就可以。
然後再就入mysql數據庫查看編碼發現改成了utf8了。
下面是我重啟mysql服務器進入mysql數據庫查出來的結果：
Java代碼
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 520
Server version: 5.5.16 MySQL Community Server (GPL)
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> 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/local/mysql-5.5.16-osx10.6-x86_64/share/charsets/ |
+--------------------------+--------------------------------------------------------+
8 rows in set (0.00 sec)
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 520
Server version: 5.5.16 MySQL Community Server (GPL)
Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> 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/local/mysql-5.5.16-osx10.6-x86_64/share/charsets/ |
+--------------------------+--------------------------------------------------------+
8 rows in set (0.00 sec)
至此，這個困擾多日的問題終於解決了。
附修改好的my.cnf文件內容，不知道為什麼附件我上傳不了，就把代碼貼出來吧：
Java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
作者：zhyl2010
