最近專案需要做一個controller層的aop，主要解決下面問題：

1.controller日誌統一列印輸出json格式，相容json和velocity 。

2.專案異常處理

3.異常郵件傳送

4.頁面訪問統計

主要思路使用aop實現，controller引數統一使用@RequestParam接收。

controller

    @RequestMapping(name = "添加個人資訊", value ="/addInfo", method = RequestMethod.POST)
    public String addInfo(@RequestParam("idFront") MultipartFile idFront,
                           @RequestParam(
 
"idReverse") MultipartFile idReverse,
                           @RequestParam("idNo")  String idNo,
                           @RequestParam("realName") String  realName,
                           @RequestParam("token") String token,
                           HttpServletRequest request)
            
 
throws Exception {

aop

@Aspect
@Component
public class CotrollerLogAop {

    private final static Logger logger = LoggerFactory.getLogger(CotrollerLogAop.class);
　　 //請求資訊快取
    private final static Map<String, Object[]> MethodInfo=new ConcurrentHashMap<String, Object []>();
    //專案名
 

    @Value("${base.project.name}")
    private String projectName;
    //spring boot 錯誤頁面uri
    @Value("${server.error.path:/error}")
    private String errorPath;
    //郵件傳送
    @Autowired
    private EmailClient emailClient;
    //頁面統計
    @Autowired
    private PageStatService pageStatService;
    //切面
    @Pointcut("@annotation(org.springframework.web.bind.annotation.RequestMapping)")
    public void requestMapping() {
    }
    //增強
    @Around("requestMapping()")
    public Object doBasicProfiling(ProceedingJoinPoint pjp) throws Throwable {
        long startTime=System.currentTimeMillis();
        long endTime=0;
        Object[] objects = pjp.getArgs();
        String userName = "";
        String reqArray = "";
        String respView = null;
        String respData = null;
        String operation = null;
        Object object = null;
        String ip = null;
        Boolean returnJson=false;
        String[] paramNames=null;
        String referer=null;
        String userAgent=null;
        boolean errorReq=false;
        try {
            HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
            operation=request.getRequestURI();
            referer=request.getHeader("Referer");
            if(referer==null) referer="";
            userAgent=request.getHeader("User-Agent");
            if(userAgent==null) userAgent="";
            Method method = ((MethodSignature) pjp.getSignature()).getMethod();
            if (operation.equals(errorPath)) {
                errorReq=true;
                returnJson=method.getAnnotation(ResponseBody.class)!=null;
            }else{
                Object [] info=getMethodInfo(operation, method);
                returnJson=(Boolean) info[0];
                paramNames=(String [])info[1];
            }
            //請求相關引數
            ip = RequestParamUtil.getClientIpAddr(request);
            SessionUser securityUser = (SessionUser) request.getSession().getAttribute(Constants.SESSIONKEY);
            if (securityUser != null) {
                userName = securityUser.getShowName();
            }
            reqArray = ArrayToJsonString(objects, paramNames);
            //執行該方法
            object = pjp.proceed();
            //響應相關引數
            if (returnJson) {
                if(object instanceof String){
                    respData=(String)object;
                }else{
                    respData = JSON.toJSONString(object);
                }
            } else {
                if (object instanceof ModelAndView) {
                    respView = ((ModelAndView) object).getViewName();
                } else {
                    respView = (String) object;
                }
                respData = RequestParamUtil.getResponseStr(request);
            }
            //spring boot 系統錯誤
            if(errorReq){
                pageStatService.addStat("/error");
                HttpServletResponse response = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getResponse();
                if(returnJson){
                    Map<String, Object> map = new HashMap<String, Object>();
                    ResponseEntity entity = null;
                    if (response.getStatus() == 404) {
                        map.put("code", MsgCode.ERROR);
                        map.put("msg", "資源不存在！");
                        entity = new ResponseEntity<Map<String, Object>>(map, HttpStatus.OK);
                    } else {
                        map.put("code", MsgCode.ERROR);
                        map.put("msg", "系統異常！");
                        entity = new ResponseEntity<Map<String, Object>>(map, HttpStatus.OK);
                    }
                    emailClient.sendSysErrorEmail(operation, response.getStatus() + "-->"+respData);
                    logger.info("<|>error_redirect<|>{}<|>{}<|>{}<|>{}<|>異常資訊<|>{}<|>改寫<|>{}<|>", projectName, userName, ip, operation, respData, JSON.toJSONString(map));
                    return entity;
                }else{
                    ModelAndView view = null;
                    if (response.getStatus() == 404) {
                        view = new ModelAndView("error/404");
                    } else {
                        view = new ModelAndView("error/500");
                    }
                    String msg=JSON.toJSONString(((ModelAndView) object).getModel());
                    emailClient.sendSysErrorEmail(operation, response.getStatus() + "-->"+msg);
                    logger.info("<|>error_redirect<|>{}<|>{}<|>{}<|>{}<|>異常資訊<|>{}<|>改寫<|>{}<|>", projectName, userName, ip, operation, msg, view.getViewName());
                    return view;
                }
            }
            endTime=System.currentTimeMillis();
            logger.info("<|>common<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>", projectName, userName, ip, operation, referer, reqArray, userAgent, respView, respData, endTime-startTime);
            pageStatService.addStat(operation);
            return object;
        } catch (Exception e) {
            endTime=System.currentTimeMillis();
            if (returnJson) {
                BaseResp baseResp = new BaseResp();
                if (e instanceof OpenException) {
                    OpenException openException = (OpenException) e;
                    baseResp.setFailedMsg(openException.getMessage());
                    logger.info("<|>common<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>", projectName, userName, ip, operation, referer, reqArray, userAgent, "", JSON.toJSONString(baseResp), endTime-startTime);
                } else {
                    e.printStackTrace();
                    logger.info("<|>error<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>", projectName, userName, ip, operation,referer, reqArray,userAgent, e.getMessage(), startTime-endTime);
                    baseResp.setFailedMsg("系統異常！");
                    emailClient.sendSysErrorEmail(operation, e.getMessage());
                }
                return baseResp;
            } else {
                e.printStackTrace();
                emailClient.sendSysErrorEmail(operation, e.getMessage());
                logger.info("<|>error<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>{}<|>", projectName, userName, ip, operation, referer, reqArray, userAgent, e.getMessage(), startTime-endTime);
                return "error/500";
            }
        }
    }
    //拼接請求json
    private String ArrayToJsonString(Object[] objects, String [] paramNames) throws Exception {
        StringBuilder reqArray = new StringBuilder("{");
        if (paramNames!=null && paramNames.length>0 && objects != null && objects.length > 0) {
            for (int i = 0; i < objects.length; i++) {
                if (objects[i] == null) {
                    continue;
                }
                if(paramNames.length>i) {
                    String className = objects[i].getClass().getName();
                    if (className.contains("MultipartFile")) {
                        MultipartFile multipartFile = (MultipartFile) objects[i];
                        reqArray.append("\"").append(paramNames[i]).append("\":\"").
                                append(multipartFile.getOriginalFilename()).append("\",");
                     } else {
                        reqArray.append("\"").append(paramNames[i]).append("\":").
                                append(JSON.toJSONString(objects[i])).append(",");
                    }
                }else{
                    break;
                }
            }
        }
        if (reqArray.length() > 1) {
            reqArray.replace(reqArray.length() - 1, reqArray.length(), "}");
        } else {
            reqArray.append("}");
        }
        return reqArray.toString();
    }

    private  Object[] getMethodInfo(String operation, Method method) throws Exception{
        Object [] info=MethodInfo.get(operation);
        if(info==null){
           info=new Object[2];
        }else{
            return info;
        }
        Boolean returnJson=false;
        if(method.getAnnotation(ResponseBody.class)!=null){
            returnJson=true;
        }
        info[0]=returnJson;
        Annotation[][] parameterAnnotations = method.getParameterAnnotations();
        List<String> list=new ArrayList<String>();
        if (parameterAnnotations != null) {
            int i = 0; //陣列增強for和普通遍歷等價
            for (Annotation[] parameterAnnotation : parameterAnnotations) {
                for (Annotation annotation : parameterAnnotation) {
                    if (annotation instanceof RequestParam) {
                        RequestParam param = (RequestParam) annotation;
                        list.add(param.value());
                        break;
                    }
                }
            }
        }
        info[1]=list.toArray(new String[0]);
        MethodInfo.put(operation, info);
        return info;
    }

}