springMVC--全局异常处理

全局异常主要处理controller中抛出的异常,需注意controller中不需要捕获异常

 

一、@ControllerAdvice + @ExceptionHandler 实现全局异常处理

1、@ControllerAdvice 中申明@ExceptionHandler 方法,对所有controller中的@RequestMapping方法有效。

2、@Controller 中申明@ExceptionHandler 方法,仅对当前controller中的@RequestMapping方法有效。

全局异常处理类GlobalErrorHandler .java代码如下(需保证该类所在路径可以被扫描加载到spring容器):

package com.tianwen.dcdp.exception.handler;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.json.MappingJackson2JsonView;

@ControllerAdvice
public class GlobalErrorHandler {

    /**
     * 检查是否ajax请求
     * @param request
     * @return
     */
    public static boolean isAjax(HttpServletRequest request) {
        return request.getHeader("X-Requested-With") != null &&
                "XMLHttpRequest".equalsIgnoreCase(request.getHeader("X-Requested-With"));
    }
    
    /**
     * 全局异常处理
     * @param request
     * @param response
     * @param ex
     * @return
     * @throws Exception
     */
    @ExceptionHandler(Exception.class)
    public Object errorHandler(HttpServletRequest request,
            HttpServletResponse response,
            Exception ex) throws Exception{
        if(isAjax(request)) {
            //如果是ajax请求,返回json数据
            ModelAndView mav = new ModelAndView(new MappingJackson2JsonView());
            mav.addObject("result", 0);
            mav.addObject("msg", ex.getMessage());
            return mav;
        } else {
            //如果不是ajax请求,跳转到错误页面
            ModelAndView mv = new ModelAndView();
            mv.addObject("exception", ex);
            mv.addObject("url", request.getRequestURL());
            mv.addObject("msg", ex.getMessage());
            if(request.getRequestURL().toString().contains("/m/")) {
                mv.setViewName("m/error");
            } else {
                mv.setViewName("error");
            }
            return mv;
        }
    }
    
}

spring 部分配置如下:

<!-- 自动扫描 -->
    <context:component-scan base-package="com.tianwen.dcdp">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        <context:exclude-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
    </context:component-scan>

springmvc部分配置如下:

<context:component-scan base-package="com.tianwen.dcdp.*">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        <context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
    </context:component-scan>

如此便可实现异常的统一处理

 

未完待续

posted @ 2018-06-28 19:36  yinz163diudiu  阅读(171)  评论(0编辑  收藏  举报