或者建表時帶上編碼utf8

CREATE TABLE `students`(
    `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
    `name` VARCHAR(20) NOT NULL,
    `nickname` VARCHAR(20) NULL,
    `sex` CHAR(1) NULL,
    `in_time` DATETIME NULL
   ) DEFAULT CHARSET 'utf8';

或者修改table的編碼：

alter table students convert to character set utf8;

如果仍有編碼不是utf8的，請檢查配置檔案，也可使用mysql命令設定：

set character_set_client = utf8;

set character_set_server = utf8;

set character_set_connection = utf8;

    

set character_set_results = utf8;

set collation_connection = utf8_general_ci;

set collation_database = utf8_general_ci;

set collation_server = utf8_general_ci;