目錄

9.1 總覽

第9章 SpringMVC全域性異常處理

9.1 總覽

• SpringMVC全域性異常處理
• Spring和SpringMVC包掃描範圍
• @Component
• @ModelAndView

9.2 異常流程圖

9.2.1 無SpringMVC全域性異常

9.2.2 有SpringMVC全域性異常

9.3 使用SpringMVC全域性異常

9.3.1 配置

（1）applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:task="http://www.springframework.org/schema/task"
       xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd">

    <context:component-scan base-package="com.mmall" annotation-config="true">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

   <!--其餘略-->
</beans>
 

（2）dispatcherServlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
	http://www.springframework.org/schema/mvc
	http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 二期溫馨提示,springmvc掃描包指定到controller，防止重複掃描 -->
    <context:component-scan base-package="com.mmall.controller" annotation-config="true" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!--其餘略-->
</beans>
 

9.3.2 程式碼

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());

        //當使用是jackson2.x的時候使用MappingJackson2JsonView，課程中使用的是1.9。
        modelAndView.addObject("status",ResponseCode.ERROR.getCode());
        modelAndView.addObject("msg","介面異常,詳情請檢視服務端日誌的異常資訊");
        modelAndView.addObject("data",e.toString());
        return modelAndView;
    }

}