Mysql 5.7 for Mac永久修改默认字符集（解决乱码问题）

查看自己mysql上的默认字符集

1.在终端连接mysql后输入show variables like '%char%';

如果是这样，数据库就会出现乱码

永久修改默认字符集为utf-8

1.利用mac的soptlight 找到目录
/usr/local/mysql-5.7.17-macos10.12-x86_64/support-files

拷贝一份到桌面并编辑，将如下内容拷贝到文件中并命名为my.cnf ：

# 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 

2.将my.cnf 拷贝到 /etc 目录下（在spotlight中输入/etc）
并重启mysql（在设置里面）

3.在终端输入show variables like '%char%';

这样就大功告成了！