使用springmvc的MultipartFile实现单文件和多文件上传

向右看齐 2022-06-12 07:13 172阅读 0赞

> 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：

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            <property name="defaultEncoding" value="UTF-8" />
            
            <property name="maxUploadSize" value="200000"/>
            
            
        </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="background-color: #4cbb91;" 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="background-color: #4cbb91;" 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。