AOP获取方法注解实现动态切换数据源

@Order(1)
@Aspect
@Repository
public class DataSourceAspect {

    @Pointcut("execution(* com.xxx.service.impl.*.*(..))")
    private void anyMethod() {}

    @AfterReturning(value = "anyMethod()", returning = "result")
    public void afterReturning(JoinPoint joinPoint,Object result){
        DataSourceHolder.clearDataSourceType();
    }

    @Before(value="anyMethod()")
    public void before(JoinPoint joinPoint){
　　　　 //通过切点对象获取当前切点所在的方法对象
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();
        Method method = methodSignature.getMethod();
        //如果方法体上使用了DataSource注解
        if (method.isAnnotationPresent(DataSource.class)) {
            //获取该方法上的注解名
            DataSource datasource = method.getAnnotation(DataSource.class);
            //将方法体上的注解的值赋予给DataSourceHolder数据源持有类
            DataSourceHolder.setDataSourceType(datasource.value());
        }
    }
}