1. MyExceptionHandler.java global exception handling class

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;

/**
 * <h5>Description: Global exception handling class < / H5 >
 * Execute this exception handling class first
 *  
 */
@ControllerAdvice
public class MyExceptionHandler {
    private final Logger log = LoggerFactory.getLogger(getClass());

    @ExceptionHandler(value =Exception.class)
    public String exceptionHandler(HttpServletRequest request, Exception e){
        Map<String, Object> paramsMap = getMaps(request);
        Map<String, Object> headersMap = getHeaders(request);

        String requestUri = request.getAttribute("org.springframework.web.servlet.HandlerMapping.lookupPath").toString();
        log.error("request[{}]Happen[{}]abnormal\r\n parameter[{}]\r\nheader[{}]", requestUri,e.getMessage(),paramsMap,headersMap, e);

        // Return error information to other exception handling classes
        return e.getMessage();
    }

    // =================== private method ===================

    /**
     * <h5>Function: get the parameter information passed from request < / H5 >
     * 
     * @return Map<String, Object>
     */
    private Map<String, Object> getMaps(HttpServletRequest request){
        Map<String, Object> paramMap = new HashMap<String, Object>();
        Enumeration<String> enume = request.getParameterNames();
        while (enume.hasMoreElements()) {
            String key = (String) enume.nextElement();
            String[] values = request.getParameterValues(key);
            paramMap.put(key, values.length == 1 ? request.getParameter(key).trim() : values);
        }

        return paramMap;
    }

    /**
     * <h5>Function: get the header information passed from the request < / H5 >
     * 
     * @return Map<String, Object>
     */
    private Map<String, Object> getHeaders(HttpServletRequest request) {
        Map<String, Object> headerMap = new HashMap<String, Object>();
        Enumeration<?> er = request.getHeaderNames();//Get all name values of the request header
        String headerName;
        while(er.hasMoreElements()){
            headerName = er.nextElement().toString();
            headerMap.put(headerName, request.getHeader(headerName));
        }

        return headerMap;
    }
}

2. MyErrorController.java global error information processing class

import javax.servlet.http.HttpServletRequest;

import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.alibaba.fastjson.JSONObject;
import com.jnxj.common.vo.MessageBean;

/**
 * <h5>Description: global error information processing < / H5 >
 *  Execute this class after executing exception handling class
 */
@RestController
public class MyErrorController implements ErrorController {

    @Override
    public String getErrorPath() {
        return "/error";
    }

    @RequestMapping("/error")
    public String handleError(HttpServletRequest request) {
        String message;
        // Get statuscode: 401404500
        Integer statusCode = (Integer) request.getAttribute("javax.servlet.error.status_code");
        if (statusCode == 400) {
            message = "Semantically incorrect,The current request cannot be understood by the server or the request parameters are wrong";
        } else if (statusCode == 401) {
            message = "Current request requires user authentication";
        } else if (statusCode == 403) {
            message = "Insufficient authority";
        } else if (statusCode == 404) {
            message = "The requested resource does not exist";
        } else {
            message = "The system got sick by accident,Emergency repair in progress,Please wait patiently...o(╥﹏╥)o";
        }

        MessageBean messageBean = new MessageBean();
        messageBean.setCode(statusCode.toString());
        messageBean.setMessage(message);
        return JSONObject.toJSONString(messageBean);
    }
}