前言
这个用的少, 总是忘, 还是记录一下吧.
拦截自定义注解, 执行方法
自定义注解
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface MethodCostTag {
String methodName() default "";
}
拦截器, 注解了上面注解的方法会被拦截, 打印一下方法执行时间
@Slf4j
@Aspect
@Component
public class MethodCostAop {
@Around(value = "@annotation(methodCostTag)")
public Object aroundMethod(ProceedingJoinPoint proceedingJoinPoint, MethodCostTag methodCostTag) throws Throwable{
String methodName = methodCostTag.methodName();
long t1 = System.currentTimeMillis();
Object obj = proceedingJoinPoint.proceed(proceedingJoinPoint.getArgs());
log.info("method execution cost:method is :{}, cost is :{}", methodName, (System.currentTimeMillis() - t1));
return obj;
}
}
拦截自定义注解, 拦截类里的方法
定义一个注解
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface ClassMethodTag {
}
定义拦截方法, 需要使用@within, 则标注了注解的类里的方法都会被拦截
@Before(value = "@within(classMethod)")
public void beforeMethod(JoinPoint joinPoint, ClassMethodTag classMethod) throws Throwable{
System.out.println("afasfadasdfsdadfadfdsfaf====" + System.currentTimeMillis());
}
直接使用controllerAdvice
controller方法签名, 标注一下@Valid注解, 对象的熟悉需要标注校验注解(@NotNull和其他)
@PostMapping("/routeAgreement")
public RouterAgreementRes routeAgreement(@Valid @RequestBody RouterAgreement agreement) throws BusinessException {
}
拦截逻辑, 参数校验不通过直接返回特定的错误码
/**
* 对controller的参数对象进行统一校验，出现异常后的统一返回错误信息
*/
@Slf4j
@RestControllerAdvice
public class ParamValidationControllerAdvice {
@ExceptionHandler(MethodArgumentNotValidException.class)
public BaseRes validExceptionHandler(MethodArgumentNotValidException e) {
log.info("validate controller param fail:{}", e.getMessage());
BaseRes res = new BaseRes();
res.setRespCode(ErrorCodeEnum.AgreementParameterNotMatch.getCode());
res.setRespMsg(ErrorCodeEnum.AgreementParameterNotMatch.getDesc());
return res;
}
}