利用springMVC包裝類上傳多個文件

前端JSP頁面代碼片斷：

<!-- springMVC包裝類上傳文件 -->
<form name="uploadFiles" id="uploadFiles" action="http://sdoa.vaiwan.com:8081/sdoa/file/uploadFiles.do" enctype="multipart/form-data" method="post">
    <div id="addFilelist">
        <div id="file_0">
            <input type="file" name="file_0"  multiple="multiple" >
        </div>
    </div>
    <input type="button" id="btn_add_file" value="增長一行"  onclick="add_file()">
    <input type="submit" value="上傳" >
</form>
<script>
j=1;

function add_file(){
    document.getElementById("addFilelist").innerHTML+='<div id="file_'+j+'"><input  name="file_'+j+'" type="file"  /><input type="button" value="刪除"  onclick="del_file('+j+')"/></div>';
    j = j + 1;
}

function del_file(o){
    document.getElementById("addFilelist").removeChild(document.getElementById("file_"+o));
}

</script>

java後臺SpringMVC uploadFilesController類代碼

@RequestMapping("uploadFiles.do")@ResponseBodypublic String uploadFiles(HttpServletRequest request, HttpServletResponse response) throws IllegalStateException, IOException {    System.out.println("*********************進入uploadFiles(HttpServletRequest request, HttpServletResponse response)方法********************");    String returnPath = "";    //建立一個通用的多部分解析器   將當前上下文初始化給CommonsMultipartResolver多部分解析器    CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());    //判斷 request 是否有文件上傳,即多部分請求     檢查form中是否有 enctype="multipart/form-data"屬性值    if(multipartResolver.isMultipart(request)){        //轉換成多部分request        MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)request;        //取得request中的全部文件名        Iterator<String> iter = multiRequest.getFileNames();        while(iter.hasNext()){            //記錄上傳過程起始時的時間，用來計算上傳時間            int pre = (int) System.currentTimeMillis();            //取得上傳文件            MultipartFile file = multiRequest.getFile(iter.next());            if(file != null){                //取得當前上傳文件的文件名稱                String myFileName = file.getOriginalFilename();                //若是名稱不爲「」,說明該文件存在，不然說明該文件不存在                if(myFileName.trim() !=""){                    System.out.println(myFileName);                    //重命名上傳後的文件名                    String fileOriginalName =  file.getOriginalFilename();                    String newFileName=UUID.randomUUID()+fileOriginalName.substring(fileOriginalName.lastIndexOf("."));                    String savedPath = request.getSession().getServletContext().getRealPath("/") + "uploadFiles/";//獲取服務器指定文件存取路徑                    File saveDir = new File(savedPath);                    if (!saveDir.exists()){                        saveDir.mkdirs();                    }                    File savedFile = new File(savedPath,newFileName);                    System.out.println(savedPath+"*********"+savedFile);                    boolean isCreateSuccess = savedFile.createNewFile();                    if(isCreateSuccess){                        file.transferTo(savedFile);  //轉存文件                    }                    if (returnPath != null && returnPath != ""){                        returnPath = returnPath +";"+ savedFile;                    }else {                        returnPath = returnPath + savedFile;                    }                }            }            //記錄上傳該文件後的時間            int finaltime = (int) System.currentTimeMillis();            System.out.println(finaltime - pre);        }        return returnPath;    }    return "方法執行錯誤";}很差的地方就是前端頁面每次點擊添加一行時頁面會刷新一下，先記錄下來，下一步準備使用ajax+input的multiple="multiple"屬性實現異步的多文件上傳。