包說明html
mysql-connector-java-5.1.45.jarjava
MySQL:5.5.28mysql
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數據庫:? ? ? ? ? ? ? ?數據庫
數據庫字符集、表等字符集:utf8mb4_unicode_ci、utf8mb4tomcat
網上的一大堆,沒說到核心點上,官方文檔以下。https://dev.mysql.com/doc/connector-j/5.1/en/connector-j-reference-charsets.html服務器
For Connector/J 5.1.46 and earlier: In order to use the utf8mb4
character set for the connection, the server MUST be configured with character_set_server=utf8mb4
; if that is not the case, when UTF-8
is used for characterEncoding
in the connection string, it will map to the MySQL character set name utf8
, which is an alias for utf8mb3
.url
5.1.46早期版本,若是要支持 utf8mb4,MySQL Server服務器端必須修改 my.ini 配置文件spa
[mysqld]
character-set-server=utf8mb4
5.1.47之後版本,utf-8 映射爲 utf8mb4,不想修改服務器,就升級下驅動,並設置下鏈接字符串
spring.datasource.url=jdbc:mysql://localhost:3306/db?characterEncoding=UTF-8
說明
不須要設置 spring.datasource.tomcat.init-s-q-l=SET NAMES utf8mb4,也不清楚事務裏面支不支持,並很差使
數據庫鏈接字符串,character_set_server=utf8mb4,試了沒用