springMVC结合AjaxForm上传文件

最近在项目中需要上传文件文件，之前一直都是form提交的，尝试了一下AjaxForm，感觉还比较好用，写篇随笔mark下，供以后使用。

相关jar:

commons-fileupload-1.1.1.jar

commons-io-1.3.2.jar

在spring-servlet.xml进行multipartResolver配置:

<bean id="multipartResolver"

  class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

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

	<property name="maxUploadSize" value="10485760000" />

	<property name="maxInMemorySize" value="40960" />

</bean>

这个是必须的，否则不好用。

页面：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

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

pageEncoding="UTF-8" session="false" %>

<html>

<!--

- Author(s): xieshuang

- Date: 2016-06-20 13:46:20

- Description:

-->

<head>

<title>Title</title>

<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>

<script src="<%=request.getContextPath()%>/common/nui/nui.js" type="text/javascript"></script>

<script src="<%=request.getContextPath()%>/common/nui/jquery/jquery-form.js" type="text/javascript"></script>

<script type="text/javascript" src="<%=request.getContextPath()%>/page4nui/master/projecttype/js/projecttype_import.js"></script>

<script type="text/javascript">

	var contextPath="<%=request.getContextPath()%>";

</script>

</head>

<body>

<div id="test" class="nui-fit" style="padding-top:5px;min-width:300px;min-height:180px;">

    <form id="fileUpload"  method="post" enctype="multipart/form-data">

    <div id="dataImport"  style="width:100%;overflow:hidden;">

        <table style="width:100%;table-layout:fixed;" class="nui-form-table" >

            <tr>

				<th  align="right"  style="width:25%" >选择文件：</th>

				<td>

					<input id="uploadFile" type="file" name="file" style="width:90%;"><font style="color:red;width:5%;"> *</font>

				</td>

			</tr>

        </table>

    </div>

    <div style="width:100%;padding-top:10px;" align="center">

        <input style="width:60px;" iconCls="icon-ok" value="确定" type="submit" />

        <span style="display:inline-block;width:25px;"></span>

	    <a class="nui-button" iconCls="icon-cancel" style="width:60px;" onclick="cancel">取消</a>

	</div>

	</form>

</div>

</body>

</html>

核心js:

var msg;

$(function(){

nui.parse();

//ajax配置

var options = {

        url: contextPath+"/webapp/cfProjectType/importExcel",

        beforeSubmit:  showRequest,  //提交前处理

        success:       showResponse,  //处理完成

        resetForm: true,

        dataType:  'json'

       };

    $('#fileUpload').submit(function() { //注意

     	$(this).ajaxSubmit(options);

     	return false;//防止dialog 自动关闭

     });

})

//执行成功回调函数

function showResponse(e) {

	nui.hideMessageBox(msg);

	if (e.importFlag == true) {

		CloseWindow("ok");

	} else {

		//对错误的一些处理

	}

}

//提交前的一些校验

function showRequest(formData, jqForm, options){

	if(formData[0].value=="" || formData[0].value==null){

		nui.alert("请选择文件");

		return false;

	}

	var fileName = $("#uploadFile").val().split("\\").pop();

	var strs = new Array(); //定义一数组

    strs = fileName.split('.');

    var suffix = strs [strs .length - 1];

    if (suffix != 'xls' && suffix != 'xlsx') {

    	nui.alert("请选择excel文件！");

    	return false;

    }

    msg = nui.loading("Loading", "Please waiting");

}

java代码：

@SuppressWarnings("unchecked")

@RequestMapping("/webapp/cfProjectType/importExcel")

@ResponseBody

public Map<String, Object> importExcel(@RequestParam("file") MultipartFile[] files, HttpServletRequest request)

        throws Throwable {

    //long starttiem = System.currentTimeMillis();

    InputStream fis;

    fis = null;

    File fileIn = null;

    try {

        for (MultipartFile myfile : files) {

            if (!myfile.isEmpty()) {

                String realPath = request.getSession().getServletContext().getRealPath("/export");

                fileIn = new File(realPath);

                //判断上传文件的保存目录是否存在

                if (!fileIn.exists() && !fileIn.isDirectory()) {

                    //创建目录

                    fileIn.mkdirs(路径);

                }

                //将上传的文件复制到文件夹下

                myfile.transferTo(new File(路径+文件名));

			}

		   }

		}

这里我之前用过另外一个方法FileUtils.copyInputStreamToFile(InputStream arg0, File arg1) 同样能将文件保存到路径下面

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springMVC结合AjaxForm上传文件

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