2018.8.2 java电商从1到2--chapter9 SpringMVC全局异常处理

目录

第9章 SpringMVC全局异常处理

9.1 总览

9.2 异常流程图

9.2.1 无SpringMVC全局异常

9.2.2 有SpringMVC全局异常

9.3 使用SpringMVC全局异常

9.3.1 配置

9.3.2 代码

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第9章 SpringMVC全局异常处理

9.1 总览

• SpringMVC全局异常处理
• Spring和SpringMVC包扫描范围
• @Component
• @ModelAndView

 

9.2 异常流程图

9.2.1 无SpringMVC全局异常

 

9.2.2 有SpringMVC全局异常

9.3 使用SpringMVC全局异常

9.3.1 配置

（1）applicationContext.xml

 

（2）dispatcherServlet.xml

 

9.3.2 代码

package com.mmall.common;

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.json.MappingJacksonJsonView;

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

/**
 * Created by geely
 */
@Slf4j
@Component
public class ExceptionResolver implements HandlerExceptionResolver{

    @Override
    public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) {
        log.error("{} Exception",httpServletRequest.getRequestURI(),e);
        ModelAndView modelAndView = new ModelAndView(new MappingJacksonJsonView());

        //当使用是jackson2.x的时候使用MappingJackson2JsonView，课程中使用的是1.9。
        modelAndView.addObject("status",ResponseCode.ERROR.getCode());
        modelAndView.addObject("msg","接口异常,详情请查看服务端日志的异常信息");
        modelAndView.addObject("data",e.toString());
        return modelAndView;
    }

}