SSM 全局异常

转载： http://blog.csdn.net/m13321169565/article/details/7641978

废话不多，直接说重点。

一  创建异常拦截类

（这里将  webapi 和 web异常放在一起处理。但是文件夹是两个的。关于 LogHelper.WebLog和LogHelper.ApiLog）

参见文章：http://blog.csdn.net/hanjun0612/article/details/72639867

public class AnnotationHandlerMethodExceptionResolver extends ExceptionHandlerExceptionResolver {
    private String defaultErrorView;
    public String getDefaultErrorView() {
        return defaultErrorView;
    }
    public void setDefaultErrorView(String defaultErrorView) {
        this.defaultErrorView = defaultErrorView;
    }
    /***
     * 异常后跳转到页面
     */
    protected ModelAndView doResolveHandlerMethodException(HttpServletRequest request, HttpServletResponse response, HandlerMethod handlerMethod, Exception exception) {
        try {
            if (handlerMethod == null) {
                return null;
            }
            Method method = handlerMethod.getMethod();
            if (method == null) {
                return null;
            }
            ModelAndView returnValue = super.doResolveHandlerMethodException(request, response, handlerMethod, exception);
            ResponseBody responseBodyAnn = AnnotationUtils.findAnnotation(method, ResponseBody.class);
            if (responseBodyAnn != null) {
                ResponseStatus responseStatusAnn = AnnotationUtils.findAnnotation(method, ResponseStatus.class);
                if (responseStatusAnn != null) {
                    HttpStatus responseStatus = responseStatusAnn.value();
                    String reason = responseStatusAnn.reason();
                    if (!StringUtils.hasText(reason)) {
                        response.setStatus(responseStatus.value());
                    } else {
                        response.sendError(responseStatus.value(), reason);
                    }
                }
                return handleResponseBody(returnValue, request, response);
            }
            if (returnValue.getViewName() == null) {
                returnValue.setViewName(defaultErrorView);
            }
            return returnValue;
        } catch (Exception e) {
            LogerHelper.WebLog(e.getMessage());
            return null;
        }
    }
    /**
     * 异常后 返回json
     *
     * @param returnValue
     * @param request
     * @param response
     * @return
     * @throws ServletException
     * @throws IOException
     */
    @SuppressWarnings({"unchecked", "rawtypes"})
    private ModelAndView handleResponseBody(ModelAndView returnValue, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        try {
            Map value = returnValue.getModelMap();
            HttpInputMessage inputMessage = new ServletServerHttpRequest(request);
            List<MediaType> acceptedMediaTypes = inputMessage.getHeaders().getAccept();
            if (acceptedMediaTypes.isEmpty()) {
                acceptedMediaTypes = Collections.singletonList(MediaType.ALL);
            }
            MediaType.sortByQualityValue(acceptedMediaTypes);
            HttpOutputMessage outputMessage = new ServletServerHttpResponse(response);
            Class<?> returnValueType = value.getClass();
            List<HttpMessageConverter<?>> messageConverters = super.getMessageConverters();
            if (messageConverters != null) {
                for (MediaType acceptedMediaType : acceptedMediaTypes) {
                    for (HttpMessageConverter messageConverter : messageConverters) {
                        if (messageConverter.canWrite(returnValueType, acceptedMediaType)) {
                            messageConverter.write(value, acceptedMediaType, outputMessage);
                            return new ModelAndView();
                        }
                    }
                }
            }
            if (logger.isWarnEnabled()) {
                logger.warn("Could not find HttpMessageConverter that supports return type [" + returnValueType + "] and " + acceptedMediaTypes);
            }
            return null;
        } catch (Exception e) {
            LogerHelper.ApiLog(e.getMessage());
            return null;
        }
    }
}  

二 添加xml配置

找到springmvc-servlet.xml

添加：

<bean id="handlerExceptionResolver" class="com.sanju.sanjuSCM.ExceptionResolver.AnnotationHandlerMethodExceptionResolver">
		<property name="defaultErrorView" value="error/500.jsp"/> <!--错误页面-->
		<property name="messageConverters">
			<list>
				<bean    class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />
				<!-- JSON转换器无需设置mediaType,由外部客户端调用时，手动设置相关mediaType -->
				<bean    class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" />
			</list>
		</property>
	</bean>

就完成了！

====================================================================================

下面是我项目中用到的。
配置文件和上面的还是一样

public class AnnotationHandlerMethodExceptionResolver extends ExceptionHandlerExceptionResolver {
    private String defaultErrorView;
    public String getDefaultErrorView() {
        return defaultErrorView;
    }
    public void setDefaultErrorView(String defaultErrorView) {
        this.defaultErrorView = defaultErrorView;
    }
    /***
     * 异常后跳转到页面
     */
    protected ModelAndView doResolveHandlerMethodException(HttpServletRequest request, HttpServletResponse response, HandlerMethod handlerMethod, Exception exception) {
        Method method=null;
        ModelAndView returnValue=null;
        try {
            if (handlerMethod == null) {
                return null;
            }
            method = handlerMethod.getMethod();
            if (method == null) {
                return null;
            }
            returnValue = super.doResolveHandlerMethodException(request, response, handlerMethod, exception);
//这里获取  @RestController和普通 @ResponseBody 的两种注解情况
            Annotation restControllerAnn = method.getDeclaringClass().getAnnotation(RestController.class);
            Annotation responseBodyAnn = restControllerAnn==null
                            ?AnnotationUtils.findAnnotation(method, ResponseBody.class)
                            :restControllerAnn;
            if (responseBodyAnn != null) {
                ResponseStatus responseStatusAnn = AnnotationUtils.findAnnotation(method, ResponseStatus.class);
                if (responseStatusAnn != null) {
                    HttpStatus responseStatus = responseStatusAnn.value();
                    String reason = responseStatusAnn.reason();
                    if (!StringUtils.hasText(reason)) {
                        response.setStatus(responseStatus.value());
                    } else {
                        response.sendError(responseStatus.value(), reason);
                    }
                }
                return handleResponseBody(returnValue, request, response,handlerMethod,exception);
            }
            if (returnValue.getViewName() == null) {
                returnValue.setViewName(defaultErrorView);
            }
            return returnValue;
        } catch (Exception e) {
            SimpleDateFormat formatter =new SimpleDateFormat ("yyyy-MM-dd HH:mm:ss"); ;
            String exMsg="\r\n\r\n============================================================\r\n";
            exMsg+="Date : "+(formatter.format(new Date()))+"\r\n\n";
            exMsg+="ErrorMsg : "+exception+"\r\n\n";
            exMsg+="ClassName : "+handlerMethod.getBean().getClass()+"\r\n\n";
            exMsg+="MethodName : "+handlerMethod.getMethod().getName()+"\r\n\n";
            exMsg+="Exception : "+handlerMethod +"\r\n\n";
            LogerHelper.WebLog(exMsg);
            return null;
        }
    }
    /**
     * 异常后 返回json
     *
     * @param returnValue
     * @param request
     * @param response
     * @return
     * @throws ServletException
     * @throws IOException
     */
    @SuppressWarnings({"unchecked", "rawtypes"})
    private ModelAndView handleResponseBody(ModelAndView returnValue, HttpServletRequest request, HttpServletResponse response, HandlerMethod handlerMethod, Exception exception) throws Exception {
        ResultModel rm=new ResultModel();
        rm.setMessage(exception.getMessage());
        try {
            String json= JsonConvert.toJSON(rm);
            response.getWriter().write(json);
            response.getWriter().flush();
            response.getWriter().close();
            return null;
        } catch (Exception e) {
            SimpleDateFormat formatter =new SimpleDateFormat ("yyyy-MM-dd HH:mm:ss"); ;
            String exMsg="\r\n\r\n============================================================\r\n";
            exMsg+="Date : "+(formatter.format(new Date()))+"\r\n\n";
            exMsg+="reqString : "+request.getParameter("reqString")+"\r\n";
            exMsg+="sign : "+request.getParameter("sign") +"\r\n";
            exMsg+="ErrorMsg : "+exception+"\r\n\n";
            exMsg+="ClassName : "+handlerMethod.getBean().getClass()+"\r\n\n";
            exMsg+="MethodName : "+handlerMethod.getMethod().getName()+"\r\n\n";
            exMsg+="Exception : "+handlerMethod +"\r\n\n";
            LogerHelper.ApiLog(exMsg);
            rm.setMessage(e.getMessage());
            String json= JsonConvert.toJSON(rm);
            response.getWriter().write(json);
            response.getWriter().flush();
            response.getWriter().close();
        }
return  null;
    }
}