使用攔截器獲取請求參數信息並寫入日誌

1. 前言
   使用攔截器獲取請求的參數，ip地址等等信息，然後寫入日誌更加方便後期異常的維護。

2.代碼實例

public class RequestParamInfoIntorceptor extends HandlerInterceptorAdapter  {

    private Logger logger = LoggerFactory.getLogger(RequestParamInfoIntorceptor.class);

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        try {
            if (handler instanceof HandlerMethod) {
                HandlerMethod handlerMethod = (HandlerMethod) handler;
                String beanName = handlerMethod.getBean().getClass().toString();//類
                String methodName = handlerMethod.getMethod().getName();//方法名稱
                if(methodName.equals("error") || methodName.equals("success")) {
                    return super.preHandle(request, response, handler);
                }
                String uri = request.getRequestURI();//請求路徑
                String remoteAddr = getIpAddr(request);//ip
                String method = request.getMethod(); //請求方式
                Map<String,String[]> pramMap = request.getParameterMap();
                StringBuffer sbf = new StringBuffer();
                int count = 0;
                String forCunt = "";
                for(Map.Entry<String, String[]> entry:pramMap.entrySet()){  
                    forCunt = "[" + count + "]" + " : " ;
                    sbf.append( "paramName" + forCunt + entry.getKey() + " - "+ "paramValue" + 
                            forCunt + request.getParameter(entry.getKey()) + "\n");
                    count ++;
                } 
                logger.info(" { beanName : " + beanName + " | " + "methodName : " + methodName + " | " + "uri : "
                        + uri + " | " + "remoteAddr : " + remoteAddr + " | " + "requestMethod : " +
                        method + "\n" + "param : " + sbf + "}");
            }

        } catch (Exception e) {
            //出錯
            logger.error(LogUtil.setLogError(e, "用戶操作日誌記錄異常" , "RequestParamInfoIntorceptor"));
        }
        return super.preHandle(request, response, handler);
    }

    //獲取客戶端IP
    private String getIpAddr(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }

}