spring mvc 实现多文件上传

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我是靠谱客的博主淡定御姐，最近开发中收集的这篇文章主要介绍spring mvc 实现多文件上传，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

最近研究spring MVC 实现多文件上传，记录一下实现过程

upload.jsp 内容为

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script type="text/javascript" src="Js/jquery-1.7.2.js"></script> //这里很重要仔细看路径
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
    i = 1;
    j = 1;
    $(document).ready(function(){
        $("#btn_add2").click(function(){
            document.getElementById("newUpload2").innerHTML+='<div id="div_'+j+'"><input name="file_'+j+'" type="file" /><input type="button" value="删除" οnclick="del_2('+j+')"/></div>';
              j = j + 1;
        });
    });

    function del_2(o){
         document.getElementById("newUpload2").removeChild(document.getElementById("div_"+o));
    }

</script>
</head>
<body>

    <form name="userForm2" action="/项目名/file/upload2.action" enctype="multipart/form-data" method="post">
        <div id="newUpload2">
          <input type="file" name="file">
        </div>
        <input type="button" id="btn_add2" value="增加一行" >
        <input type="submit" value="上传" >

    </form>
</body>
</html>
controller的内容为：

@Controller
@RequestMapping("/file")
public class UploadController {
     @RequestMapping("/upload2" )
     public String upload2(HttpServletRequest request,HttpServletResponse response) throws IllegalStateException, IOException {
         //创建一个通用的多部分解析器
         CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
        //判断 request 是否有文件上传,即多部分请求
         if(multipartResolver.isMultipart(request)){
             //转换成多部分request
            MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)request;
           System.out.println(multiRequest.getAttribute("name")); ;
             //取得request中的所有文件名
             Iterator<String> iter = multiRequest.getFileNames();
             while(iter.hasNext()){
                 //记录上传过程起始时的时间，用来计算上传时间
                 int pre = (int) System.currentTimeMillis();
                 //取得上传文件
                 MultipartFile file = multiRequest.getFile(iter.next());
                if(file != null){
                     //取得当前上传文件的文件名称
                     String myFileName = file.getOriginalFilename();
                    //如果名称不为“”,说明该文件存在，否则说明该文件不存在
                    if(myFileName.trim() !=""){
                         System.out.println(myFileName);
                        //重命名上传后的文件名
                        String fileName = "demoUpload" + file.getOriginalFilename();
                         //定义上传路径
                         String path = "D:/" + fileName;
                         File localFile = new File(path);
                         file.transferTo(localFile);
                     }
                 }                 //记录上传该文件后的时间
                 int finaltime = (int) System.currentTimeMillis();
                 System.out.println(finaltime - pre);
             }