mybatis多数据源切换

@Configuration
public class DataSourceConfig {

    @Bean(name = "primaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "secondaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.secondary")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }
}

public class DynamicDataSource extends AbstractRoutingDataSource {

    @Override
    protected Object determineCurrentLookupKey() {
        return DynamicDataSourceContextHolder.getDataSourceKey();
    }
}

public class DynamicDataSourceContextHolder {

    private static final ThreadLocal<String> contextHolder = new ThreadLocal<>();

    public static void setDataSourceKey(String key) {
        contextHolder.set(key);
    }

    public static String getDataSourceKey() {
        return contextHolder.get();
    }

    public static void clearDataSourceKey() {
        contextHolder.remove();
    }
}

@Aspect
@Component
public class DataSourceAspect {

    @Around("@annotation(com.example.annotation.TargetDataSource)")
    public Object around(ProceedingJoinPoint point) throws Throwable {
        MethodSignature signature = (MethodSignature) point.getSignature();
        Method method = signature.getMethod();
        TargetDataSource dataSource = method.getAnnotation(TargetDataSource.class);
        if (dataSource != null) {
            DynamicDataSourceContextHolder.setDataSourceKey(dataSource.value());
        }
        try {
            return point.proceed();
        } finally {
            DynamicDataSourceContextHolder.clearDataSourceKey();
        }
    }
}

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface TargetDataSource {
    String value();
}