spring mvc/spring boot 全局异常处理

该类不需要controller继承！！！

package com.smallk.controller.base;

import com.smallk.common.Const;
import com.smallk.utils.BusinessException;
import com.smallk.utils.HttpUtil;
import com.smallk.utils.JsonResult;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 异常处理
 *
 * @author smallk
 * @date 2018/10/28 23:04
 */
@Slf4j
@ControllerAdvice
public class ExceptionHandlerController {

    private static final String XHR = "XMLHttpRequest";

    /**
     * Global exception handling
     */
    @ExceptionHandler
    public String errorSkip(HttpServletRequest request, HttpServletResponse response, Exception e) {
        String xmlHttpRequest = request.getHeader("X-Requested-With");
        if (XHR.equals(xmlHttpRequest)) {
            JsonResult res = new JsonResult();
            if (e instanceof BusinessException) {
                res.setMsg(e.getMessage());
                res.setStatus(Const.BUSINESS_EXCEPTION);
                HttpUtil.toJson(res, response);
            } else {
                log.error("", e);
                e.printStackTrace();
                res.setMsg("Request error");
                res.setStatus(Const.AJAX_ERROR);
                response.setHeader("AJAX_ERROR", Const.AJAX_ERROR);
                HttpUtil.toJson(res, response);
            }
            return null;
        }
        log.error("", e);
        e.printStackTrace();
        return "error/error";
    }
}