SpringBoot全局异常处理

在SpringBoot默认的异常处理是返回一个HTML页面，但是在前后端分离的开发模式下，服务器出现异常应该以json格式返回数据给前端。

@ControllerAdvice
public class GlobalExceptionAdvice {

    // 捕获所有异常
    @ExceptionHandler(Exception.class)
    // 以rest方式响应给客户端
    @ResponseBody
    public Object exceptionHandler(Exception e){
        Map map = new HashMap<>();
        map.put("error", e.getMessage());
        map.put("status", HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        map.put("exception", e.getClass().getName());
        map.put("timestamp", new Date());
        HttpServletRequest request = ((ServletRequestAttributes) (RequestContextHolder.getRequestAttributes())).getRequest();
        HttpServletResponse response = ((ServletRequestAttributes) (RequestContextHolder.getRequestAttributes())).getResponse();
        map.put("path", request.getRequestURI());
        response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        return map;
    }
}