从C#到Java（Aspect）

1.pom.xml中导入依赖

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>

2.创建class，并加入注解

@Aspect
@Component
@Slf4j
public class PayChannelAspect {
    private final String POINT_CUT = "execution(public * com.xx.xx.xx.service.xxService.*(..))";

    @Autowired
    private AppConfiguration appConfiguration;


    @Around(POINT_CUT)
    public Object doInvoke(ProceedingJoinPoint joinPoint) throws Throwable {
        var appId = Arrays.stream(joinPoint.getArgs()).findFirst().orElse("N");
        if (appId.equals("N")) {
            log.error("参数未传");
            return BaseResult.fail("参数未传");
        }
        var wxOpen = appConfiguration.getWx().equals("Y") ? true : false;
        var aliOpen = appConfiguration.getAli().equals("Y") ? true : false;
        if (!wxOpen) {
            if (appId.equals(appConfiguration.getWxAppId())
                    || appId.equals(appConfiguration.getMpAppId())) {
                log.info("微信支付通道已经关闭，参数：" + joinPoint.getArgs());
                return BaseResult.fail("微信支付通道已经关闭");
            }
        }
        if (!aliOpen) {
            if (appId.equals(appConfiguration.getAliAppId())) {
                log.info("支付宝支付通道已经关闭，参数：" + joinPoint.getArgs());
                return BaseResult.fail("支付宝支付通道已经关闭");
            }
        }
        return joinPoint.proceed();
    }
}

aspect包含四个注解，@Before，@After，@AfterReturning，@Around

　　@Before  方法执行前

　　@After 方法执行后，返回前

　　@Afterreturning 方法返回

　　@Around 环绕，从切面首先进入@Around -> @Before -> Method -> @Around -> @After -> @AfterReturning

如果有多个Aop切面拦截，需要在类上加入注解：@Order