spring data jpa utf-8编码不起作用

Question

我使用spring-data-jpa和mysql数据库.我的表格字符集是utf-8.我?useUnicode=yes&characterEncoding=utf8还在application.properties文件中添加了mysql url.将"ąčęėį"这样的字符传递给控制器​​以将其保存在mysql中时出现问题.在mysql我得到了??? 分数.但是当我使用mysql控制台的例子时,update projects_data set data="?????" where id = 1;每个都运行良好.

application.properties:

# "root" as username and password.
spring.datasource.url = jdbc:mysql://localhost:3306/gehive?useUnicode=yes&characterEncoding=utf8
spring.datasource.username = gehive
spring.datasource.password = pass

spring.datasource.driver-class-name=com.mysql.jdbc.Driver

# Keep the connection alive if idle for a long time (needed in production)
spring.datasource.testWhileIdle = true
spring.datasource.validationQuery = SELECT 1

# Show or not log for each sql query
spring.jpa.show-sql = true

# Hibernate ddl auto (create, create-drop, update)
spring.jpa.hibernate.ddl-auto = update

# Naming strategy
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy


# Use spring.jpa.properties.* for Hibernate native properties (the prefix is
# stripped before adding them to the entity manager)

# The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

表:

+---------------+--------------------+
| TABLE_NAME    | character_set_name |
+---------------+--------------------+           
| customer      | utf8               |
| projects      | utf8               |
| projects_data | utf8               |
+---------------+--------------------+

Answer 1

尝试

spring.datasource.url = jdbc:mysql://localhost:3306/gehive?useUnicode=yes&characterEncoding=UTF-8

似乎问题是由于缺少" - ".

参考: - https://forum.hibernate.org/viewtopic.php?f=1&t=1037497&view=next

Answer 2

我遇到了同样的问题，并通过将以下行添加到application.properties文件中来解决了这个问题：

spring.datasource.tomcat.connection-properties=useUnicode=true;characterEncoding=utf-8;

注意：以下操作无效：

spring.datasource.connectionProperties=useUnicode=true;characterEncoding=utf-8;

Answer 3

对于不喜欢将参数直接附加到 JDBC URL 的任何使用 HikariCP 连接池的人：

该spring.datasource.connectionProperties物业前段时间已被移除。从那时起，您需要使用连接池特定的属性，如@SebTheGreat 的回答所示： spring.datasource.tomcat.connection-properties=useUnicode=true;characterEncoding=utf-8;

Hikari 没有connection-properties属性，但这有效：

spring.datasource.hikari.data-source-properties.useUnicode=true
spring.datasource.hikari.data-source-properties.characterEncoding=UTF-8