mysql设置编码为UTF8，设置表为UTF8。

setcharacter_set_client=utf8;

setcharacter_set_server=utf8;

setcharacter_set_connection=utf8;

setcharacter_set_database=utf8;

setcharacter_set_results=utf8;

setcollation_connection=utf8_general_ci;

setcollation_database=utf8_general_ci;

setcollation_server=utf8_general_ci;

createdatabaseapp_relationcharactersetutf8;