Spring MVC - MultipartFile实现文件上传(单文件与多文件上传)

时间：2023-01-10 17:55:07

准备工作： 需要先搭建一个spirngmvc的maven项目

  • 1、加入jar包
<dependency>

      <groupId>commons-fileupload</groupId>

      <artifactId>commons-fileupload</artifactId>

      <version>1.3</version>

 </dependency>
  • 2、在springmvc的配置文件中，加入如下配置：
  <!--SpringMVC上传文件时，需要配置MultipartResolver处理器-->

    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

        <property name="defaultEncoding" value="UTF-8" />

        <!-- 指定所上传文件的总大小不能超过200KB。注意maxUploadSize属性的限制不是针对单个文件，而是所有文件的容量之和 -->

        <property name="maxUploadSize" value="200000"/>

        <!-- 指定上传文件的临时路径 -->

        <!-- <property name="uploadTempDir" value="uploadTempDirectory" /> -->

    </bean>
  • 3、创建Controller
package cn.van.controller;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.multipart.MultipartFile;

import java.io.File;

import java.io.IOException;

/**

 * Created by van on 2017-07-18.

 */

@Controller

@RequestMapping("/upload")

public class MultipartFileController {

    //单文件上传

    @RequestMapping("/toFileUpload")

    public String toUpload(){

        return "fileUpload/fileUpload";

    }

    @RequestMapping("fileUpload")

    @ResponseBody

    public String upload(MultipartFile multipartFile){

        if(!multipartFile.isEmpty()){

            //设置文件的保存路径

            String filePath = "D:\\MultipartFile\\" + multipartFile.getOriginalFilename();

            //转存文件

            try {

                multipartFile.transferTo(new File(filePath));

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

        return "success";

    }

    //多文件上传

    @RequestMapping("/toFileUploadFiles")

    public String toUploadFiles(){

        return "fileUpload/fileUploadFiles";

    }

    @RequestMapping("fileUploadFiles")

    @ResponseBody

    //此处用@RequestParam（"xx"）来指定参数名，不加会报错

    public String uploadFiles(@RequestParam("multipartFile") MultipartFile[] multipartfiles) throws IOException {

        String savePath = "D:\\MultipartFile\\";

        if(multipartfiles != null && multipartfiles.length != 0){

            if(null != multipartfiles && multipartfiles.length > 0){

                //遍历并保存文件

                for(MultipartFile file : multipartfiles){

                    file.transferTo(new File(savePath + file.getOriginalFilename()));

                }

            }

        }

        return "success";

    }

}
  • 4、写两个简单的上传页面（单文件和多文件）

单文件：

<%@page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"%>

<%@include file="/WEB-INF/jsp/common/common.jsp"%>

<html>

<title>test</title>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<head>

    <style type="text/css">

        .upload {

            margin-top: 100px;

            margin-left: 100px;

            text-align: center;

        }

    </style>

</head>

<body>

    <h1 style="text-align: center;margin-top: 20px">test</h1>

    <div>

        <form class="upload" action="${path}/upload/fileUpload" method="post" enctype="multipart/form-data">

            <p>

                选择文件:<input type="file" name="multipartFile"/>

            </p>

            <p></p>

            <p style="margin-top: 20px;">

                <input style="" type="submit" value="上传并检测"/>

            </p>

        </form>

    </div>

</body>

</html>

多文件：

<%@page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"%>

<%@include file="/WEB-INF/jsp/common/common.jsp"%>

<html>

<title>test</title>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<head>

    <style type="text/css">

        .upload {

            margin-top: 100px;

            margin-left: 100px;

            text-align: center;

        }

    </style>

</head>

<body>

    <h1 style="text-align: center;margin-top: 20px">test</h1>

    <div>

        <form class="upload" action="${path}/upload/fileUploadFiles" method="post" enctype="multipart/form-data">

            <p>

                选择文件:<input type="file" name="multipartFile"/>

                <input type="file" name="multipartFile"/>

                <input type="file" name="multipartFile"/>

            </p>

            <p></p>

            <p style="margin-top: 20px;">

                <input style="" type="submit" value="上传并检测"/>

            </p>

        </form>

    </div>

</body>

</html>

5、访问页面，选择本地文件，上传成功。

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