java.lang.ClassCastException: org.apache.catalina.connector.RequestFacade cannot

浅瞳夜未 2019-01-21 01:36:44

前台：

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>文件上传</title>

    <script type="text/javascript" src="/js/jquery-1.8.3.min.js"></script>

    <script>

        function ajaxFileUpload() {

            var form = new FormData;          //创建一个FormData对象

            form.append("file",$("#file").get(0).files[0]);

            //将文件放到FormData对象中

            console.log($("#file")[0].files[0]);

            console.log(form);

            console.log($("input[name='username']").val());

            console.log($("input[name='password']").val());

            $.ajax({

                url :"/uploadfile",//访问路径

                contentType: false,

                processData: false,

                cache: false,

                type:"POST",

                // async: false,

                dataType : "json",

                data :{

                    "username":$("input[name='username']").val(),

                    "password":$("input[name='password']").val(),

                    "file":form

                }

            }).success(function(data,status){

                if(status=="success"){

                    if(data.code==200){

                        alert("文件上传成功");

                    }

                    if(data.code==400){

                        alert("文件上传失败");

                    }

                }

            }).error(function(){

                alert("服务器未响应");

            });

        }

    </script>

</head>

<!--<body>

<form method="POST" enctype="multipart/form-data" action="/uploadfile">-->

    <!--文件：<input type="file" name="file" /><br/>-->

    <!--<input type="submit" value="上传" />-->

<!--</form>-->

<body>

    <label>UserName:</label><input type="text" name="username"/><br>

    <label>UserName:</label><input type="password" name="password"/><br>

    <input type="file" multiple="multiple" id="file" onchange="ajaxFileUpload();" />

</body>



</html>

后台：

@PostMapping("/uploadfile")

    public String  upload(HttpServletRequest request) throws IOException {

//        System.out.println("parms:"+parms);

//        JSONObject jsonObject = JSONObject.parseObject("parms");

//        String username = jsonObject.getString("username");

//        String password = jsonObject.getString("password");

//        JSONObject jsonObject = JSONObject.parseObject(parms);



//        CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());

        MultipartFile file = file = ((MultipartHttpServletRequest)request).getFile("file");

//        System.out.println(multipartResolver.isMultipart(request));

//        if(multipartResolver.isMultipart(request)){

//            file = ((MultipartHttpServletRequest)request).getFile("file");

//            System.out.println("asdasds");

//        }

        //处理 Json 文件上传

        if (file != null) {

            String originalFilename = file.getOriginalFilename();

            System.out.println("源文件名:"+originalFilename);

            String suffix  = originalFilename.substring(originalFilename.lastIndexOf("."));

            System.out.println("源文件后缀为:"+suffix);

            //将文件转化称字节流

            InputStream is = file.getInputStream();

            //上传到服务器

            String savePath = FastDFSUtil.uploadFile(is, file, file.getSize(), FilenameUtils.getExtension(file.getOriginalFilename()), null);

            if (savePath != null) {

                System.out.println("文件保存在:"+savePath);

            }else{

                System.out.println("文件上传失败！！！");

            }

        }

        return "success";

    }

很纳闷为什么总是转换异常呢？转换不过去怎么回事有那个大佬帮忙解决一下啊

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浅瞳夜未 2019-01-21

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@Configuration

public class FileConfig {



    //加入到容器当中 配置限制文件大小

    @Bean

    public CommonsMultipartResolver multipartResolver(){

        CommonsMultipartResolver resolver = new CommonsMultipartResolver();

        resolver.setDefaultEncoding("UTF-8");

        //resolveLazily属性启用是为了推迟文件解析，以便在UploadAction 中捕获文件大小异常

        resolver.setResolveLazily(true);

        //每个文件最大上传300MB

        resolver.setMaxUploadSizePerFile(1024*1024*300);

        //最大文件大小  350M

        resolver.setMaxUploadSize(1024*1024*350);

        resolver.setMaxInMemorySize(1024);

        return resolver;

    }

}