AOP+自定义注解实现service统一的异常信息处理

返回信息枚举 TipsMsg：

public enum TipsMsg {DEFAULT_SUCCESS("0","操作成功"),DEFAULT_FAILED("1","操作失败"),//其他枚举//get//set}

自定义注解 ReturnMsg （也是切点）：

@Target(ElementType.METHOD)//方法上声明
@Retention(RetentionPolicy.RUNTIME)//注解将被编译器记录在class文件中，而且在运行时会被虚拟机保留，因此它们能通过反射被读取到
public @interface ReturnMsg {TipsMsg successMsg() default TipsMsg.DEFAULT_SUCCESS;TipsMsg failedMsg() default TipsMsg.DEFAULT_FAILED;
}

AOP切面:

@Aspect//声明切面
@Component
public class ReturnMsgAspect {private Logger logger = LoggerFactory.getLogger(ReturnMsgAspect.class);@Pointcut("@annotation(xx.xxx.xx.xx.xx.xx.xx.ReturnMsg)")//切点为注解全路径public void  ReturnMsgPointcut(){}@Around(value = "ReturnMsgPointcut()")public Object serviceAround(ProceedingJoinPoint joinPoint) throws Throwable {//返回值统一MethodSignature signature = (MethodSignature) joinPoint.getSignature();//获取返回值类型Class returnType = signature.getReturnType();//获取注解ReturnMsg returnMsg = signature.getMethod().getAnnotation(ReturnMsg.class);String msg = returnMsg.successMsg().getTipsMsg();String code = returnMsg.successMsg().getCode();Object returnObj = null;try {returnObj = joinPoint.proceed();} catch (Exception e) {e.printStackTrace();throw new ZTBusinessException(BaseRspConstants.RSP_CODE_FAILD, returnMsg.failedMsg().getTipsMsg());}RspBaseBO rspBaseBO = BizEntityApis.buildRspBaseBO(code, msg);if(returnObj instanceof RspBaseBO){//调用成功时，有返回值且为RspBaseBO子类((RspBaseBO) returnObj).setMessage(msg);//默认成功返回值set进去returnObj = returnType.cast(returnObj);}return returnObj;}
}

使用

@ReturnMsg(successMsg = TipsMsg.DEFAULT_SUCCESS,failedMsg = TipsMsg.DEFAULT_FAILED)public RspBaseBO serviceA (Input in) {//业务方法，joinPoint.proceed()所调用的方法
}