spring的统一进行异常处理

public class ExceptionHandler extends SimpleMappingExceptionResolver {

    private static final Logger logger = LoggerFactory.getLogger(ExceptionHandler.class);

    @Override
    protected ModelAndView doResolveException(HttpServletRequest request, HttpServletResponse response, Object handler,
            Exception ex) {

        ModelAndView mv = super.doResolveException(request, response, handler, ex);

        String url = WebUtils.getPathWithinApplication(request);

        logger.error("controller error.url=" + url, ex);

        /* 使用response返回 */
        response.setStatus(HttpStatus.OK.value()); // 设置状态码
        response.setContentType(MediaType.APPLICATION_JSON_VALUE); // 设置ContentType
        response.setCharacterEncoding("UTF-8"); // 避免乱码
        response.setHeader("Cache-Control", "no-cache, must-revalidate");
        
        JsonResult jsonResult=new JsonResult(JsonResultCode.FAILURE,"系统错误,请联系管理员","");
        
        if(ex instanceof ServiceException)
        {
            ServiceException serviceException=(ServiceException)ex;
            String code=serviceException.getCode();
            String message=serviceException.getMessage();
            jsonResult=new JsonResult(code,message,"");
        }
        try 
        {
            PrintWriter printWriter = response.getWriter();
            printWriter.write(JSONObject.fromObject(jsonResult).toString());
            printWriter.flush();
            printWriter.close();
        } catch (IOException e) 
        {
            logger.error("与客户端通讯异常:" + e.getMessage(), e);
        }
        logger.error("异常:" + ex.getMessage(), ex);
        return mv;
    }
}

 在spring的配置文件加上 <bean id="exceptionHandler" class="xxx.xxx.xxx.ExceptionHandler"/>   

 

第二种方式，基于HandlerExceptionResolver接口方式

@Component  
public class MyHandlerExceptionResolver implements HandlerExceptionResolver  {  
  
    @Override  
    public ModelAndView resolveException(HttpServletRequest request,  
            HttpServletResponse response, Object object, Exception exception) {  
        //是否为ajax请求  
        String requestType = request.getHeader("X-Requested-With");  
         if(exception instanceof AuthorizationException){  
            response.setStatus(413);//无权限异常  主要用于ajax请求返回  
            response.addHeader("Error-Json", "{\"code\":413,\"msg\":\"nopermission\"}");  
            response.setContentType("text/html;charset=utf-8");  
            if("XMLHttpRequest".equals(requestType)){  
                return new ModelAndView();  
            }  
            return new ModelAndView("redirect:/html/413.html");  
        }  
        return null;  
    } 
}

该方法返回一个ModelAndView对象，在方法内部对异常的类型进行判断，然后返回合适的ModelAndView对象，如果该方法返回了null，则spring会

继续寻找其他的实现了HandlerExceptionResolve接口的bean