全局异常处理器

两种方式：

springboot Restful使用@ControllerAdvice、@ExceptionHandler、@ResponseBody实现全局异常处理
@ControllerAdvice 注解定义全局异常处理类
@ExceptionHandler 指定自定义错误处理方法拦截的异常类型
同一个异常被小范围的异常类和大范围的异常处理器同时覆盖，会选择小范围的异常处理器

一.

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

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


@Commpent
public class GlobalException implements HandlerExceptionResolver {
    private static final Logger logger= LoggerFactory.getLogger(GlobalException.class);

    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
        //打印控制台
        ex.printStackTrace();
        //写日志
        logger.debug("debug日志");
        logger.info("info日志");
        logger.error("系统发生异常",ex);
        //发邮件,使用jmail工具报
        //展示友好错误页面
        ModelAndView modelAndView=new ModelAndView("error/exception");
        return modelAndView;
    }
}

二.

@ControllerAdvice
public class GlobalExceptionHandler {

      @ExceptionHandler(value = Exception.class)
      public ModelAndView resolveException(HttpServletRequest request, Exception ex) throws Exception {
        ModelAndView mav = new ModelAndView();
        System.out.println(ex.getMessage());
        mav.addObject("errMsg", ex.getMessage());
        mav.setViewName("error");
        return mav;
      }
}