cần chỉnh setting MYSQL
UTF 8 Settings
init-connect='SET NAMES utf8mb4' collation_server=utf8mb4_unicode_ci character_set_server=utf8mb4 #skip-character-set-client-handshake #character_sets-dir="C:/xampp/mysql/share/charsets"
[mysqldump] quick max_allowed_packet = 16M
[mysql] no-auto-rehash
Remove the next comment character if you are not familiar with SQL
#safe-updates default-character-set=utf8mb4
Chỉnh CONFIG TOMCAT
/conf/server.xml <Connector ... URIEncoding="UTF-8">