修改my.ini，在[mysqld]下加上

    default-storage-engine=INNODB 

其中红色字体部分是要指定的引擎名称。

用sql语句修改已经建成表的引擎：

alter table tableName type=InnoDB

下面贴出我的my.ini文件供参考(http://www.my400800.cn)：

[mysqld]
basedir=C:/Program Files/VertrigoServ/Mysql/
datadir=C:/Program Files/VertrigoServ/Mysql/data/
port =3306
key_buffer =64M
max_allowed_packet =1M
table_cache =128
sort_buffer_size =512K
net_buffer_length =8K
read_buffer_size =256K
read_rnd_buffer_size =512K
myisam_sort_buffer_size =68M
default-storage-engine=INNODB

[mysqldump]
quick
max_allowed_packet =116M

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

[isamchk]
key_buffer =20M
sort_buffer_size =20M
read_buffer =62M
write_buffer =62M

[myisamchk]
key_buffer =20M
sort_buffer_size =20M
read_buffer =62M
write_buffer =62M

[mysqlhotcopy]
interactive-timeout