Controller层aop

利用@Around通知修改Controller的返回值

自定义一个注解@OperationBtn

在切入点Controller上加上自定义注解

接下来就是重点了，AspectJ写切面类，对该Controller 1 @Component

@Aspect
public class OperationBtnAspect {

    @Autowired
    private AppTableOperationServiceI appTableOperationService;
    
    
    @Around(value = "@annotation(anno)", argNames = "anno")
    public AjaxJson aroundMthod(ProceedingJoinPoint point, OperationBtn anno) throws Throwable{
        RequestAttributes ra = RequestContextHolder.getRequestAttributes();
        ServletRequestAttributes sra = (ServletRequestAttributes) ra;
        HttpServletRequest request = sra.getRequest();
        
        String url = request.getRequestURL().toString(); // http://localhost:8080/5U/appDataController.do （URL：返回的是完整的url，包括Http协议，端口号，servlet名字和映射路径，但它不包含请求参数。）
        String method = request.getMethod();  // POST
        String uri = request.getRequestURI();  // /5U/appDataController.do 
        String queryString = request.getQueryString();  // addOrUpdateData&operId=402881e8645f580501645f61202c0044&optId=402881e8645f580501645f61203d004c（返回url路径后面的查询字符串）
        queryString = queryString.substring(queryString.indexOf("operId"));
        queryString = queryString.substring(7,queryString.indexOf("&"));
        AppTableOperationEntity operationEntity = appTableOperationService.getEntity(AppTableOperationEntity.class, queryString);
        AjaxJson json = (AjaxJson) point.proceed();  //执行Controller中方法，得到返回值json
        if(json.isSuccess() && operationEntity !=null && operationEntity.getCallbackSucMsg() !=null){
            json.setMsg(operationEntity.getCallbackSucMsg());
        }else if(!json.isSuccess() && operationEntity !=null && operationEntity.getCallbackSucMsg() !=null){
            json.setMsg(operationEntity.getCallbackFailMsg());
        }
        return json;
    }
}