/**
* 自定義注解，用于參數(shù)
*/
@Target(PARAMETER)
@Documented
@Retention(RetentionPolicy.RUNTIME)
public @interface Test{
}
/**
* 接口層，使用使用@Test注解標(biāo)記參數(shù)
*/
@RestController
@RequestMapping("/v1/test")
public class TestController {
    @PostMapping(value = "/email", produces = "application/json")
    public String send(@RequestBody @Test MailSendDTO mailSendDTO) {
        //TODO 業(yè)務(wù)處理
        return "SUCCESS";
    }
}

@Aspect
@Configuration
public class ValidateAop {
 
    /**
     * 切點配置，表達式， 在com.laoxi.test.controller包下，所有的類public的任意參數(shù)的方法
     */
    @Pointcut("execution(public * com.laoxi.test.controller.*.*(..))")
    public void validate(){}
 
    @Before("validate()")
    public void doBefore(JoinPoint joinPoint){
        Object[] params = joinPoint.getArgs();
        if(params.length == 0){
            return;
        }
        //獲取方法，此處可將signature強轉(zhuǎn)為MethodSignature
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        Method method = signature.getMethod();
 
        //參數(shù)注解，1維是參數(shù)，2維是注解
        Annotation[][] annotations = method.getParameterAnnotations();
        for (int i = 0; i < annotations.length; i++) {
            Object param = params[i];
            Annotation[] paramAnn = annotations[i];
            //參數(shù)為空，直接下一個參數(shù)
            if(param == null || paramAnn.length == 0){
                continue;
            }
            for (Annotation annotation : paramAnn) {
                //這里判斷當(dāng)前注解是否為Test.class
                if(annotation.annotationType().equals(Test.class)){
                    //校驗該參數(shù)，驗證一次退出該注解
                    //TODO 校驗參數(shù)
                    break;
                }
            }
        }
    }
}

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Axin {
    /**
     * 所屬模塊
     * @return
     */
    String module()  default "日志模塊";
 
    /**
     * 動作描述
     * @return
     */
    String desc()  default "無動作";
}

/**
 * @author Axin
 */
@Aspect
@Component
public class AxinAspect {
 
    /**
     * 這里定義了一個總的匹配規(guī)則，以后攔截的時候直接攔截log()方法即可，無須去重復(fù)寫execution表達式
     */
    @Pointcut("@annotation(Axin)")
    public void log() {
    }
 
    @Before("log()&&@annotation(axin)")
    public void doBefore(JoinPoint joinPoint,Axin axin) {
        System.out.println("******攔截前的邏輯******");
        System.out.println("目標(biāo)方法名為:" + joinPoint.getSignature().getName());
        System.out.println("目標(biāo)方法所屬類的簡單類名:" + joinPoint.getSignature().getDeclaringType().getSimpleName());
        System.out.println("目標(biāo)方法所屬類的類名:" + joinPoint.getSignature().getDeclaringTypeName());
        System.out.println("目標(biāo)方法聲明類型:" + Modifier.toString(joinPoint.getSignature().getModifiers()));
        //獲取傳入目標(biāo)方法的參數(shù)
        Object[] args = joinPoint.getArgs();
        for (int i = 0; i < args.length; i++) {
            System.out.println("第" + (i + 1) + "個參數(shù)為:" + args[i]);
        }
        System.out.println("被代理的對象:" + joinPoint.getTarget());
        System.out.println("代理對象自己:" + joinPoint.getThis());
 
        System.out.println("攔截的注解的參數(shù)：");
        System.out.println(axin.module());
        System.out.println(axin.desc());
    }
 
    @Around("log()&&@annotation(axin)")
    public Object doAround(ProceedingJoinPoint proceedingJoinPoint,Axin axin) throws Throwable {
        System.out.println("環(huán)繞通知：");
        System.out.println(axin.module());
        System.out.println(axin.desc());
        Object result = null;
        result = proceedingJoinPoint.proceed();
        return result;
    }
 
    @After("log()")
    public void doAfter() {
        System.out.println("******攔截后的邏輯******");
    }
}

//匹配AOP對象的目標(biāo)對象為指定類型的方法，即DemoDao的aop的代理對象
@Pointcut("this(com.hhu.DemaoDao)")
public void thisDemo() {
    ...
}

public void doBefore(JoinPoint joinPoint) {
System.out.println("******攔截前的邏輯******");
System.out.println("目標(biāo)方法名為:" + joinPoint.getSignature().getName());
System.out.println("目標(biāo)方法所屬類的簡單類名:" + joinPoint.getSignature().getDeclaringType().getSimpleName());
    System.out.println("目標(biāo)方法所屬類的類名:" + joinPoint.getSignature().getDeclaringTypeName());
    System.out.println("目標(biāo)方法聲明類型:" + Modifier.toString(joinPoint.getSignature().getModifiers()));
    //獲取傳入目標(biāo)方法的參數(shù)
    Object[] args = joinPoint.getArgs();
    for (int i = 0; i < args.length; i++) {
        System.out.println("第" + (i + 1) + "個參數(shù)為:" + args[i]);
    }
    System.out.println("被代理的對象:" + joinPoint.getTarget());
    System.out.println("代理對象自己:" + joinPoint.getThis());
}

//Service接口
public interface AxinService {
    String axinRun(String arg1, User user);
} 
//實現(xiàn)類
/**
 * @author Axin
 */
@Component
public class AxinServiceImpl implements AxinService { 
    @Axin(module = "print",desc = "打印")
    @Override
    public String axinRun(String arg1, User user) {
        String res = arg1 + user.getName() + user.getAge();
        return res;
    }
 
    public String axinRun(String arg1, Person person) {
        String res = arg1 + person.getName() + person.getAge();
        return res;
    }
}
 
//控制類
/**
 * @author Axin
 */
@RestController
public class HelloController {
    @Autowired
    AxinService axinService;
 
    @RequestMapping("/hello")
    public String hello() {
        User user = new User();
        user.setAge(10);
        user.setName("張三");
        String res = axinService.axinRun("Test:", user); 
        return "Hello Spring Boot!<br>"+res;
    }
}