public class AnySdkDataSourceCondition implements Condition {
    @Override
    public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
        Environment env = context.getEnvironment();
        // 檢查是否配置了任意一個SDK數(shù)據(jù)源
        // 條件注解的優(yōu)勢：只有業(yè)務(wù)方真正配置了數(shù)據(jù)源，SDK才會生效，避免不必要的Bean加載
        return env.containsProperty("spring.datasource.sdk-primary.jdbc-url") ||
               env.containsProperty("spring.datasource.sdk-secondary.jdbc-url");
    }
}

@Configuration
// 條件注解：只有配置了sdk-primary數(shù)據(jù)源時才啟用此配置
@ConditionalOnProperty(prefix = "spring.datasource.sdk-primary", name = "jdbc-url")
// 指定Mapper接口的掃描路徑，并指定SqlSessionFactory的Bean名稱
@MapperScan(
    basePackages = "com.example.sdk.dao.primary", 
    sqlSessionFactoryRef = "sdkPrimarySqlSessionFactory"
)
public class SdkPrimaryDataConfig {

    // 主數(shù)據(jù)源Bean，使用@ConfigurationProperties讀取配置
    @Bean(name = "sdkPrimaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.sdk-primary")
    public DataSource sdkPrimaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    // 主數(shù)據(jù)源SqlSessionFactory
    @Bean(name = "sdkPrimarySqlSessionFactory")
    public SqlSessionFactory sdkPrimarySqlSessionFactory(
            @Qualifier("sdkPrimaryDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        // 設(shè)置Mapper XML文件的位置
        bean.setMapperLocations(new PathMatchingResourcePatternResolver()
                .getResources("classpath*:mapper/primary/*.xml"));
        return bean.getObject();
    }

    // 主數(shù)據(jù)源SqlSessionTemplate
    @Bean(name = "sdkPrimarySqlSessionTemplate")
    public SqlSessionTemplate sdkPrimarySqlSessionTemplate(
            @Qualifier("sdkPrimarySqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }

    // 主數(shù)據(jù)源事務(wù)管理器
    @Bean(name = "sdkPrimaryTransactionManager")
    public DataSourceTransactionManager sdkPrimaryTransactionManager(
            @Qualifier("sdkPrimaryDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }
}

@Mapper
public interface SdkAppInfoDao {
    AppInfo getByBusinessId(String businessId);
}

public class SdkAppInfoService {
    private SdkAppInfoDao sdkAppInfoDao;

    public void setSdkAppInfoDao(SdkAppInfoDao sdkAppInfoDao) {
        this.sdkAppInfoDao = sdkAppInfoDao;
    }

    public AppInfo getByBusinessId(String businessId) {
        // 這里可以添加具體業(yè)務(wù)邏輯，如本地緩存、日志等
        return sdkAppInfoDao.getByBusinessId(businessId);
    }
}

@Configuration
@Conditional(AnySdkDataSourceCondition.class)
@Import({SdkPrimaryDataConfig.class, SdkSecondaryDataConfig.class})
public class SdkAutoConfiguration {

    // 只有配置了sdk-primary數(shù)據(jù)源時才創(chuàng)建此Bean
    @Bean
    @Lazy  // 延遲加載，確保DAO先初始化
    @ConditionalOnProperty(prefix = "spring.datasource.sdk-primary", name = "jdbc-url")
    public SdkAppInfoService sdkAppInfoService(SdkAppInfoDao sdkAppInfoDao) {
        SdkAppInfoService service = new SdkAppInfoService();
        service.setSdkAppInfoDao(sdkAppInfoDao);
        return service;
    }
    
    // 只有配置了sdk-secondary數(shù)據(jù)源時才創(chuàng)建此Bean
    @Bean
    @Lazy
    @ConditionalOnProperty(prefix = "spring.datasource.sdk-secondary", name = "jdbc-url")
    public SdkOtherDataService sdkOtherDataService(SdkOtherDataDao sdkOtherDataDao) {
        SdkOtherDataService service = new SdkOtherDataService();
        service.setSdkOtherDataDao(sdkOtherDataDao);
        return service;
    }
}

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.example.sdk.config.SdkAutoConfiguration

<dependency>
    <groupId>com.example</groupId>
    <artifactId>sdk-multi-datasource</artifactId>
    <version>1.0.0</version>
</dependency>

spring:
  datasource:
    sdk-primary:
      jdbc-url: jdbc:mysql://primary-db-host:3306/primary_db
      username: db_user
      password: db_password
      driver-class-name: com.mysql.jdbc.Driver
    sdk-secondary:
      jdbc-url: jdbc:mysql://secondary-db-host:3306/secondary_db
      username: db_user
      password: db_password
      driver-class-name: com.mysql.jdbc.Driver

@RestController
public class BusinessController {
    
    @Autowired
    private SdkAppInfoService sdkAppInfoService;
    
    @GetMapping("/app-info/{businessId}")
    public AppInfo getAppInfo(@PathVariable String businessId) {
        return sdkAppInfoService.getByBusinessId(businessId);
    }
}