springboot 集成动态数据源

No problem! Springboot集成动态数据源可以通过设置AbstractRoutingDataSource类的determineCurrentLookupKey()方法来实现。这个方法会返回当前线程所需的数据源名称，让程序根据名称获取对应的数据源。这样就可以实现动态切换数据源的功能了。

相关问题

springboot集成动态数据源

在Spring Boot中集成动态数据源，可以使用第三方库Dynamic DataSource Routing或Spring提供的AbstractRoutingDataSource类来实现。其中Dynamic DataSource Routing提供了更加灵活的配置方式，可以根据需要动态切换数据源。

使用Dynamic DataSource Routing的步骤如下：
1. 引入依赖：在pom.xml文件中添加以下依赖

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
    <version>2.5.3</version>
</dependency>

2. 配置数据源：在application.yml文件中配置数据源信息，可以配置多个数据源

spring:
  datasource:
    dynamic:
      datasource:
        master:
          url: jdbc:mysql://localhost:3306/master?useUnicode=true&characterEncoding=utf-8&useSSL=false
          username: root
          password: root
        slave1:
          url: jdbc:mysql://localhost:3306/slave1?useUnicode=true&characterEncoding=utf-8&useSSL=false
          username: root
          password: root
        slave2:
          url: jdbc:mysql://localhost:3306/slave2?useUnicode=true&characterEncoding=utf-8&useSSL=false
          username: root
          password: root
      primary: master

3. 配置动态数据源：在配置类中添加以下代码

@Configuration
public class DynamicDataSourceConfig {

    @Bean
    @ConfigurationProperties("spring.datasource.druid.master")
    public DataSource masterDataSource() {
        return DruidDataSourceBuilder.create().build();
    }

    @Bean
    @ConfigurationProperties("spring.datasource.druid.slave1")
    public DataSource slave1DataSource() {
        return DruidDataSourceBuilder.create().build();
    }

    @Bean
    @ConfigurationProperties("spring.datasource.druid.slave2")
    public DataSource slave2DataSource() {
        return DruidDataSourceBuilder.create().build();
    }

    @Bean
    public DynamicDataSource dynamicDataSource() {
        Map<Object, Object> targetDataSources = new HashMap<>();        targetDataSources.put("master", masterDataSource());
        targetDataSources.put("slave1", slave1DataSource());
        targetDataSources.put("slave2", slave2DataSource());
        return new DynamicDataSource(masterDataSource(), targetDataSources);
    }
}

4. 使用动态数据源：在需要使用数据源的地方，使用@DS注解指定数据源

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserMapper userMapper;

    @DS("slave1")
    @Override
    public List<User> listUsers() {
        return userMapper.listUsers();
    }

    @DS("slave2")
    @Override
    public User getUserById(Long id) {
        return userMapper.getUserById(id);
    }

    @DS("master")
    @Override
    public void saveUser(User user) {
        userMapper.saveUser(user);
    }
}

springboot集成多数据源数据库

好的，我可以为您提供一些关于Spring Boot集成多数据源数据库的信息。在Spring Boot中，我们可以使用Spring Data JPA来处理多数据源的情况。下面是一个简单的步骤：

1. 在application.properties文件中配置数据源信息，例如：

spring.datasource.primary.url=jdbc:mysql://localhost:3306/db1
spring.datasource.primary.username=root
spring.datasource.primary.password=root

spring.datasource.secondary.url=jdbc:mysql://localhost:3306/db2
spring.datasource.secondary.username=root
spring.datasource.secondary.password=root

2. 创建两个数据源的配置类，例如：

@Configuration
@EnableJpaRepositories(
    entityManagerFactoryRef = "primaryEntityManagerFactory",
    transactionManagerRef = "primaryTransactionManager",
    basePackages = {"com.example.primary.repository"}
)
public class PrimaryDataSourceConfig {
    @Primary
    @Bean(name = "primaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Primary
    @Bean(name = "primaryEntityManagerFactory")
    public LocalContainerEntityManagerFactoryBean primaryEntityManagerFactory(
            EntityManagerFactoryBuilder builder, @Qualifier("primaryDataSource") DataSource dataSource) {
        return builder
                .dataSource(dataSource)
                .packages("com.example.primary.entity")
                .persistenceUnit("primary")
                .build();
    }

    @Primary
    @Bean(name = "primaryTransactionManager")
    public PlatformTransactionManager primaryTransactionManager(
            @Qualifier("primaryEntityManagerFactory") EntityManagerFactory entityManagerFactory) {
        return new JpaTransactionManager(entityManagerFactory);
    }
}

@Configuration
@EnableJpaRepositories(
    entityManagerFactoryRef = "secondaryEntityManagerFactory",
    transactionManagerRef = "secondaryTransactionManager",
    basePackages = {"com.example.secondary.repository"}
)
public class SecondaryDataSourceConfig {
    @Bean(name = "secondaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.secondary")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "secondaryEntityManagerFactory")
    public LocalContainerEntityManagerFactoryBean secondaryEntityManagerFactory(
            EntityManagerFactoryBuilder builder, @Qualifier("secondaryDataSource") DataSource dataSource) {
        return builder
                .dataSource(dataSource)
                .packages("com.example.secondary.entity")
                .persistenceUnit("secondary")
                .build();
    }

    @Bean(name = "secondaryTransactionManager")
    public PlatformTransactionManager secondaryTransactionManager(
            @Qualifier("secondaryEntityManagerFactory") EntityManagerFactory entityManagerFactory) {
        return new JpaTransactionManager(entityManagerFactory);
    }
}

3. 在需要使用数据源的地方，使用@Qualifier指定数据源，例如：

@Service
public class UserService {
    @Autowired
    @Qualifier("primaryEntityManagerFactory")
    private EntityManagerFactory primaryEntityManagerFactory;

    @Autowired
    @Qualifier("secondaryEntityManagerFactory")
    private EntityManagerFactory secondaryEntityManagerFactory;

    public void saveUser() {
        EntityManager entityManager1 = primaryEntityManagerFactory.createEntityManager();
        EntityManager entityManager2 = secondaryEntityManagerFactory.createEntityManager();
        // ...
    }
}

这样就可以实现Spring Boot集成多数据源数据库了。希望这些信息对您有所帮助。