xings

Spring mvc自定义全局异常处理

2016/12/18 Spring

springmvc提供全局异常处理器进行统一异常处理

全局异常

spring mvc可以通过实现HandlerExceptionResolver接口自定义异常。HandlerExceptionResolver中仅有一个方法

	ModelAndView resolveException(
				HttpServletRequest request, HttpServletResponse 	response, Object handler, Exception ex);

使用方法

自定义全局异常方法

继承HandlerExceptionResolver并实现其方法

public class GlobalExceptionResolver implements HandlerExceptionResolver {

    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
        String accept = request.getHeader("Content-Type");
        if (null != accept && accept.indexOf("application/json") <= -1) {
            StringBuilder detail = new StringBuilder();
            ModelAndView exceptionView = new ModelAndView("error");
            if (ex != null) {
                StackTraceElement[] arr = ex.getStackTrace();
                int len = arr.length;
                for (int i = 0; i < len; ++i) {
                    StackTraceElement element = arr[i];
                    detail.append(element.toString().replace("\t", "").replace("\n", "").replace("\r", ""));
                }
                exceptionView.addObject("stackInfo", detail.toString());
            }
            exceptionView.addObject("errorMsg", ex.getMessage());
            return exceptionView;
        } else {
            ServiceResponseBase exceptionEntity = new ServiceResponseBase();
            exceptionEntity.setRetcode(-1);
            exceptionEntity.setRetdesc(ex.getMessage());
            String exceptionEntityJson = JSON.toJSONString(exceptionEntity);
            ModelAndView exceptionView = new ModelAndView("apierror");
            exceptionView.addObject("errorResponse", exceptionEntityJson);
            return exceptionView;
        }
    }
}

在mvc配置文件中配置全局异常处理器

<bean id="exceptionResolver"
          class="com.springapp.mvc.exception.GlobalExceptionResolver">
</bean>

在视图中解析异常信息

error.vm

${errorMsg}
${stackInfo}

apierror.vm

${errorResponse}

示例

	@RequestMapping(value = "/testPage")
	@ResponseBody
	public  String test1(){
		int a = 1/0;
		return "ok";
	}

返回结果：

Json请求

其他请求

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