web项目中处理捕获异常统一处理

1.jfinal 中设置拦截器

2.在拦截器 捕获异常信息统一处理

public class ExceptionInterceptor implements Interceptor {

    //@Override
    public void intercept(Invocation ai) {
        BaseController controller = (BaseController) ai.getController();
        HttpServletRequest request = controller.getRequest();
        boolean successed = false;
        String exception = "";
        try {
            ai.invoke();
            successed = true;
        } catch (Exception e) {
            e.printStackTrace();
            successed = false;
            // 判断是否ajax请求
            String header = request.getHeader("X-Requested-With");
            boolean isAjax = "XMLHttpRequest".equalsIgnoreCase(header);
            String msg = e.getMessage();
            exception = Exceptions.getStackTraceAsString(e);
            controller.keepPara();
            if (isAjax) {
                msg = new StringBuilder().append("{"source":"ExceptionInterceptor","code":"1","message":"系统异常：").append(msg).append(""}").toString();
                controller.renderJson(msg);
            } else {
                String redirctUrl = request.getHeader("referer");
                if (StringUtils.isBlank(redirctUrl)) {
                    redirctUrl = request.getRequestURI();
                }
                controller.setAttr("message", msg);
                controller.setAttr("stack", exception);
                controller.setAttr("redirctUrl", redirctUrl);
                controller.render("/WEB-INF/views/error/500.jsp");
            }
        } finally {

        }
        return;

    }

}