文件的上传与下载之方式3：Spring MVC

来源：互联网发布：视频特效编辑软件编辑：程序博客网时间：2024/06/05 16:51

方式三：spring mvc

首先依旧是导包；不过在这里建的是maven项目，因此用的是依赖

    <dependency>            <groupId>commons-fileupload</groupId>            <artifactId>commons-fileupload</artifactId>            <version>1.3.1</version>    </dependency>    <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>                <version>4.3.10.RELEASE</version>    </dependency>

然后则是前端的页面

<body>        <form action="file/upload.do" method="post" enctype="multipart/form-data">            上传者：<input type="text" name="name" /><br/>            上传的文件：<input type="file" name="file" multiple="multiple"/><br/>            <input  type="submit" value="上传" />        </form>  </body><!--下载--><a href="file/download.do">点击下载</a>

java代码部分

package com.zdl;import java.io.File;import java.io.IOException;import javax.servlet.http.HttpServletRequest;import javax.ws.rs.HeaderParam;import org.apache.commons.io.FileUtils;import org.springframework.http.HttpHeaders;import org.springframework.http.HttpStatus;import org.springframework.http.MediaType;import org.springframework.http.ResponseEntity;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestHeader;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.multipart.MultipartFile;@Controller@RequestMapping("file")public class TestFile {    //上传部分    @RequestMapping(path ="upload.do")    public String upload(HttpServletRequest request,@RequestParam(value="file") MultipartFile [] mfile,String name){        for (MultipartFile multipartFile : mfile) {            String path = request.getServletContext().getRealPath("upload")+"\\"+multipartFile.getOriginalFilename();            System.out.println(name+"--"+path);            File file = new File(path);            try {                multipartFile.transferTo(file);                System.out.println("上传成功:"+multipartFile.getOriginalFilename());            } catch (Exception e) {                throw new RuntimeException(e);            }        }        return "success";    }    //下载部分    @RequestMapping(path="download.do")    public ResponseEntity<byte[]> download(@RequestHeader("User-Agent") String agent) throws Exception{        File file = new File("C:\\Users\\Administrator\\Desktop\\like.png");        //设置响应的说明和额外的参数        HttpHeaders headers = new HttpHeaders();        headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);        //由注解@RequestHeader("User-Agent")获取到浏览器的类型来解决中文乱码的问题（因为浏览器的兼容性不同）        String filename = "";        if (agent.toUpperCase().contains("CHROME")) {            filename = new String(file.getName().getBytes("utf-8"),"iso-8859-1");        }else if (agent.toUpperCase().contains("MSIE")) {            filename = new String(file.getName().getBytes("iso-8859-1"),"utf-8");        }         headers.setContentDispositionFormData("attachment", filename);        //将文件转成byte数组        byte[] by = FileUtils.readFileToByteArray(file);        //三个参数分别是一个文件的byte数组，头部信息以及响应码（201）        ResponseEntity<byte[]> rn = new ResponseEntity<byte[]>(by,headers, HttpStatus.CREATED);        return rn;    }}

springmvc.xml配置文件中上传必不可少的一部分

<context:component-scan base-package="com.zdl" /><!-- 文件上传解析器：MultipartResolver -->    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">        <property name="defaultEncoding" value="utf-8" />        <property name="maxUploadSize" value="10485760" />    </bean>

阅读全文

0 0