SpringMVC文件上传和下载

1.单文件文件上传

1.1 jsp页面

<form method="post" action="/file/fileUploads" enctype="multipart/form-data">
    <input type="file" name="file"/>
    作者<input type="text" name="author"/>
    <input type="submit" class="submit"/>
</form>

1.2 创建文件上传目录

 

1.3 Controller层

@RequestMapping("/fileUpload")
public String fileupload(HttpSession session, MultipartFile file,String  anthor) throws IOException {
    System.out.println("作者："+anthor);
    System.out.println(file);
    if (!file.isEmpty()){
        //获取文件名称
        String fileName=file.getOriginalFilename();
        //获取到需要上传的路径
        String realPath=session.getServletContext().getRealPath("/WEB-INF/upload");
        //创建文件对象
        File uploadfile=new File(realPath+"\"+fileName);
        //如何上传
        file.transferTo(uploadfile);

    }
    return "index";
}

1.4 编写spring-mvc.xml文件

<!--文件上传解析器-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSizePerFile" value="100000000"></property>
    <property name="maxUploadSize" value="5000000000"></property>
</bean>

1.5页面

 

1.6提交后目录

 

1. 多文件上传

2.1 jsp页面

<form method="post" action="/file/fileUpload" enctype="multipart/form-data">
    <input type="file" name="file"/>
        <input type="file" name="fileupload"/>
        <input type="file" name="fileupload"/>
        <input type="file" name="fileupload"/>
    作者<input type="text" name="author"/>
    <input type="submit" class="submit"/>
</form>

2.2 创建文件上传目录

 

2.3 Controller层

@RequestMapping("/fileUploads")
public String fileuploas(HttpSession session, MultipartFile[] fileupload,String  anthor) throws IOException {
    System.out.println("作者："+anthor);
    System.out.println(fileupload);
    for (MultipartFile file:fileupload){
        if (!file.isEmpty()){
            //获取文件名称
            String fileName=file.getOriginalFilename();
            //获取到需要上传的路径
            String realPath=session.getServletContext().getRealPath("/WEB-INF/upload");
            //创建文件对象
            File uploadfile=new File(realPath+"\"+fileName);
            //如何上传
            file.transferTo(uploadfile);

        }
    }

    return "index";
}

2.4 编写spring-mvc.xml文件

<!--文件上传解析器-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSizePerFile" value="100000000"></property>
    <property name="maxUploadSize" value="5000000000"></property>
</bean>

2.5页面

 

2.6 提交后的目录

 

1. 文件下载

1.1  jsp页面

<a href="/file/filedownload">下载图片</a>

1.2  Controller层

/*文件下载 */
@RequestMapping(value="/filedownload",method=RequestMethod.GET)
public ResponseEntity<byte[]> filedownload() throws IOException {
    //文件下载

        String downloadFilePath="E:\Photo\img-bed5371919de048d34749c6dd23893a7.jpg";//从我们的上传文件夹中去取

        File file = new File(downloadFilePath);//新建一个文件

        HttpHeaders headers = new HttpHeaders();//http头信息

        String downloadFileName = new String("你好.jpg".getBytes("UTF-8"),"iso-8859-1");//设置编码

        headers.setContentDispositionFormData("attachment", downloadFileName);

        headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);

        //MediaType:互联网媒介类型  contentType：具体请求中的媒体类型信息

        return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(file),headers, HttpStatus.CREATED);

    }

1.3  页面