springboot异常统一处理

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

/**
 * 全局异常处理
 */
@Configuration
public class MyExceptionHandler implements HandlerExceptionResolver {
	
    public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception ex) {
    	Logger logger = LoggerFactory.getLogger(o.getClass());
    	String msg = null;
        ModelAndView mv = new ModelAndView();
        if(ex instanceof MailException){//根据异常类别,返回不同的提示消息,可以自定义
			msg ="邮件发送异常,检查邮箱是否正确!";
			logger.warn(ex.getMessage());
		}else{//系统异常
        	ex.printStackTrace();
        	msg = ex.getMessage();
        	for(StackTraceElement s : ex.getStackTrace()) {
        		logger.error(s.toString());
        	}
           
        }
        //将信息写到前台
        httpServletResponse.setHeader("Access-Control-Allow-Origin", "*");
        httpServletResponse.setCharacterEncoding("UTF-8");
        httpServletResponse.setContentType("application/json; charset=utf-8");
        PrintWriter writer;
		try {
			writer = httpServletResponse.getWriter();
			writer.write(msg);
		    writer.close();
		} catch (IOException e) {
			logger.error("连接客户端异常："+e.getMessage(),e);
		}
       
        return mv;
    }
}