Spring接收文件示例 并解决org.apache.catalina.connector.RequestFacade cannot be cast to org.springframework.web.multipart.MultipartHttpServletRequest问题

前端代码示例

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form action="http://127.0.0.1:8093/eos/api/test/gotojsp.do" method="post"
        enctype="multipart/form-data">
        <select>
            <option value="0">请选择</option>
            <option value="1">店铺数据</option>
            <option value="2">产品数据</option>

        </select> <input type="file" name="uploadFile" />

        <button type="submit">提交</button>
    </form>
</body>
</html>

Spring 中需要增加如下配置， 否则报错org.apache.catalina.connector.RequestFacade cannot be cast to org.springframework.web.multipart.MultipartHttpServletRequest

    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize">
            <value>5120000</value>
        </property>
        <property name="maxInMemorySize">
            <value>1024</value>
        </property>
    </bean>

后端代码示例

   //亲测 如下代码可以运行成功
    @RequestMapping(value = "/gotojsp",method = RequestMethod.POST)
    public String gotojsp(HttpServletRequest request) {
        MultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext()); 
        MultipartHttpServletRequest params = resolver.resolveMultipart(request); 
        System.out.println("enter");
//        如果使用下面的方式怎会报错转换失败 不要问我为什么，我只是一个搬运工
//        MultipartHttpServletRequest params = ((MultipartHttpServletRequest) request);
        MultipartFile file = ((MultipartHttpServletRequest) request).getFile("uploadFile");
        if (file == null) {
            System.out.println("file is empty");
            return "file is empty";
        }
        List<List<String>> list = ExcelUtil.getExcelData(file);
        System.out.println("list==" + JSON.toJSONString(list));
        // request.setAttribute("testSetAttribute", me.getName());
        return "/test/testgogo.jsp";
    }

 

posted on 2018-09-13 16:11  sullb  阅读(4599)  评论(0)  编辑  收藏  举报

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