运行Spring Boot JPA示例：https://spring.io/guides/gs/accessing-data-jpa/针对MySQL数据库并尝试存储＆＃34; poo＆＃34;表情符号我得到例外java.sql.SQLException: Incorrect string value: '\xF0\x9F\x92\xA9\xF0\x9F...'
我将数据库配置为使用utf8mb4编码。
我知道这不是MySQL的问题，因为我能够使用MySQL客户端创建客户并将其存储在数据库中。我甚至可以运行示例应用程序，并让它找到一个带有大量便便的客户＆＃34;表情符号。
2015-06-05 18:10:12.382 INFO 5119 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@446b0224: startup date [Fri Jun 05 18:10:12 PDT 2015]; root of context hierarchy
2015-06-05 18:10:13.567 INFO 5119 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2015-06-05 18:10:13.588 INFO 5119 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2015-06-05 18:10:13.648 INFO 5119 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {4.3.8.Final}
2015-06-05 18:10:13.649 INFO 5119 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2015-06-05 18:10:13.651 INFO 5119 --- [ main] org.hibernate.cfg.Environment : HHH000021: Bytecode provider name : javassist
2015-06-05 18:10:13.804 INFO 5119 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {4.0.5.Final}
2015-06-05 18:10:14.086 INFO 5119 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2015-06-05 18:10:14.171 INFO 5119 --- [ main] o.h.h.i.ast.ASTQueryTranslatorFactory : HHH000397: Using ASTQueryTranslatorFactory
2015-06-05 18:10:14.365 INFO 5119 --- [ main] org.hibernate.tool.hbm2ddl.SchemaUpdate : HHH000228: Running hbm2ddl schema update
2015-06-05 18:10:14.365 INFO 5119 --- [ main] org.hibernate.tool.hbm2ddl.SchemaUpdate : HHH000102: Fetching database metadata
2015-06-05 18:10:14.366 INFO 5119 --- [ main] org.hibernate.tool.hbm2ddl.SchemaUpdate : HHH000396: Updating schema
2015-06-05 18:10:14.390 INFO 5119 --- [ main] o.hibernate.tool.hbm2ddl.TableMetadata : HHH000261: Table found: poo_test.Customer
2015-06-05 18:10:14.390 INFO 5119 --- [ main] o.hibernate.tool.hbm2ddl.TableMetadata : HHH000037: Columns: [id, lastname, firstname]
2015-06-05 18:10:14.390 INFO 5119 --- [ main] o.hibernate.tool.hbm2ddl.TableMetadata : HHH000108: Foreign keys: []
2015-06-05 18:10:14.391 INFO 5119 --- [ main] o.hibernate.tool.hbm2ddl.TableMetadata : HHH000126: Indexes: [primary]
2015-06-05 18:10:14.391 INFO 5119 --- [ main] org.hibernate.tool.hbm2ddl.SchemaUpdate : HHH000232: Schema update complete
2015-06-05 18:10:14.777 INFO 5119 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
Customer found with findOne(1L):
--------------------------------
Customer[id=1, firstName='', lastName='']
2015-06-05 18:10:14.836 INFO 5119 --- [ main] hello.Application : Started Application in 2.819 seconds (JVM running for 3.077)
2015-06-05 18:10:14.837 INFO 5119 --- [ Thread-1] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@446b0224: startup date [Fri Jun 05 18:10:12 PDT 2015]; root of context hierarchy
2015-06-05 18:10:14.838 INFO 5119 --- [ Thread-1] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown
2015-06-05 18:10:14.839 INFO 5119 --- [ Thread-1] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
这是我从示例中修改过的Application.java：
@SpringBootApplication
public class Application implements CommandLineRunner {
@Autowired
CustomerRepository repository;
public static void main(String[] args) {
SpringApplication.run(Application.class);
}
@Override
public void run(String... strings) throws Exception {
// save a couple of customers
repository.save(new Customer("", ""));
// fetch all customers
System.out.println("Customers found with findAll():");
System.out.println("-------------------------------");
for (Customer customer : repository.findAll()) {
System.out.println(customer);
}
System.out.println();
// fetch an individual customer by ID
Customer customer = repository.findOne(1L);
System.out.println("Customer found with findOne(1L):");
System.out.println("--------------------------------");
System.out.println(customer);
System.out.println();
}
}
这是我用来配置JDBC连接的application.yml文件。我在研究这个问题时使用了一些我发现的技术，但似乎没有任何效果。
spring:
datasource:
url: "jdbc:mysql://localhost:3306/poo_test?useUnicode=yes&characterEncoding=utf8&characterResultSets=utf8"
username: root
password:
connectionInitSqls: "SET NAMES utf8mb4 COLLATE utf8mb4_unicode_ci;"
driverClassName: com.mysql.jdbc.Driver
testOnBorrow: true
validationQuery: SELECT 1
jpa:
show-sql: false
database-platform: org.hibernate.dialect.MySQL5Dialect
hibernate:
ddl-auto: update
naming_strategy: org.hibernate.cfg.EJB3NamingStrategy
connection:
CharSet: utf8mb4
characterEncoding: utf8
useUnicode: true
这似乎是一个常见问题，但我还没有找到解决方案。任何帮助将不胜感激。
答案 0 :(得分：7)
在尝试了各种方法之后，我设法使用以下application.yml
来完成工作spring:
datasource:
url: "jdbc:mysql://localhost:3306/poo_test?useUnicode=yes&characterEncoding=utf8"
username: root
password:
initSQL: "SET NAMES 'utf8mb4'"
jpa:
hibernate:
ddl-auto: update
诀窍似乎是initSQL属性
答案 1 :(得分：0)
我做了同样的事情，但它对我不起作用，搜索后我发现我必须编辑my.cnf的mysql文件
sudo nano /etc/mysql/my.cnf
然后在mysqld
下添加了这一行character_set_server=utf8mb4
然后重启mysql
sudo /etc/init.d/mysqld restart
注意：如果你使用谷歌云，你应该添加标志并从控制台重新启动mysql，因为mysql与你的代码不在同一台服务器上。
答案 2 :(得分：0)
在我的情况下，以下链接解决了我的问题 Mathias mysql
特别：
[client]
default-character-set = utf8mb4
[mysql]
default-character-set = utf8mb4
[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci