使用@ControllerAdvice及@ExceptionHandler(value = Exception.class)全局异常处理

http://snowolf.iteye.com/blog/1636050

Spring 注解学习手札（八）补遗——@ExceptionHandler

http://412887952-qq-com.iteye.com/blog/2291524

全局异常捕捉【从零开始学Spring Boot】

package com.ilex.jiutou;

import com.ilex.jiutou.vo.PageResult;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;

/**
 * Created by sunyuming on 17/5/11.
 */
@ControllerAdvice
public class GlobalDefaultExceptionHandler {

    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public PageResult defaultErrorHandler(HttpServletRequest req, Exception e)  {
//      // If the exception is annotated with @ResponseStatus rethrow it and let
//      // the framework handle it - like the OrderNotFoundException example
//      // at the start of this post.
//      // AnnotationUtils is a Spring Framework utility class.
//      if (AnnotationUtils.findAnnotation(e.getClass(), ResponseStatus.class) != null)
//          throw e;
//
//      // Otherwise setup and send the user to a default error-view.
//      ModelAndView mav = new ModelAndView();
//      mav.addObject("exception", e);
//      mav.addObject("url", req.getRequestURL());
//      mav.setViewName(DEFAULT_ERROR_VIEW);
//      return mav;

            //打印异常信息：
            e.printStackTrace();
            System.out.println("GlobalDefaultExceptionHandler.defaultErrorHandler()");

       /*
        * 返回json数据或者String数据：
        * 那么需要在方法上加上注解：@ResponseBody
        * 添加return即可。
        */

       /*
        * 返回视图：
        * 定义一个ModelAndView即可，
        * 然后return;
        * 定义视图文件(比如：error.html,error.ftl,error.jsp);
        *
        */
       return PageResult.genFail("服务器繁忙");
    }

}

这种方式，异常仍然由spring捕获，与http://blog.csdn.net/silyvin/article/details/54645168相比，事务中无需显式回滚

TransactionAspectSupport.currentTransactionStatus().setRollbackOnly();