mysql无法写入中文

-- 查看数据库字符集
SHOW VARIABLES LIKE 'character_set_database';

-- 修改数据库字符集
ALTER DATABASE your_database_name CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- 查看表字符集
SHOW CREATE TABLE your_table_name;

-- 修改表字符集
ALTER TABLE your_table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- 修改列字符集
ALTER TABLE your_table_name MODIFY your_column_name VARCHAR(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

jdbc:mysql://localhost:3306/your_database_name?useUnicode=yes&characterEncoding=UTF-8

-- 授予用户写入权限
GRANT ALL PRIVILEGES ON your_database_name.* TO 'your_username'@'localhost';
FLUSH PRIVILEGES;