答:springboot配置多个数据源的操作步骤如下:1. 首先在日常开发中我们都是以单个数据库进行开发,在小型项目中是完全能够满足需求的。 但是,当我们牵扯到大型项目的时候,单个数据库。
2. 所需的资源 Spring boot Mybatis-plus Alibab Druid数据库连接池 MySql 数据库。
Spring Boot支持在同一个应用程序中使用多个数据源。下面是通过配置多个数据源的步骤:
1.在 application.properties文件中,配置第一个数据源:
spring.datasource.url=jdbc:mysql://localhost:3306/first_db
spring.datasource.username=root
spring.datasource.password=password
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
2.为第二个数据源创建新的配置类,例如 SecondDataSourceConfig.java:
@Configuration
@PropertySource("classpath:application.properties")
@EnableTransactionManagement
public class SecondDataSourceConfig {
@Autowired
private Environment env;
@Bean
public DataSource secondDataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("spring.second-datasource.driver-class-name"));
dataSource.setUrl(env.getProperty("spring.second-datasource.url"));
dataSource.setUsername(env.getProperty("spring.second-datasource.username"));
dataSource.setPassword(env.getProperty("spring.second-datasource.password"));
return dataSource;
}
@Bean
public LocalContainerEntityManagerFactoryBean secondEntityManagerFactory() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(secondDataSource());
em.setPackagesToScan("com.example.second_db.entity");
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
em.setJpaProperties(additionalProperties());
return em;
}
@Bean
public PlatformTransactionManager secondTransactionManager() {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(secondEntityManagerFactory().getObject());
return transactionManager;
}
private Properties additionalProperties() {
Properties properties = new Properties();
properties.setProperty("hibernate.hbm2ddl.auto", "update");
properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
return properties;
}
}
3.在 application.properties中,为第二个数据源添加配置:
spring.second-datasource.url=jdbc:mysql://localhost:3306/second_db
spring.second-datasource.username=root
spring.second-datasource.password=password
spring.second-datasource.driver-class-name=com.mysql.jdbc.Driver
4.在需要使用第二个数据源的地方,使用 @Qualifier`注解显式指定数据源:
@Service
public class SomeService {
@Autowired
@Qualifier("secondEntityManagerFactory")
private EntityManagerFactory secondEntityManagerFactory;
// ...
}
这样,您就可以在同一应用程序中配置多个数据源了。