SpringMVC文件上传

    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="2000000" />
        <property name="defaultEncoding" value="utf-8" />
    </bean>

<script type="text/javascript" src="/lib/jquery.form.min.js"></script>

    <form id="file-upload-form" class="hide" method="post" enctype="multipart/form-data">
        <input name="file" type="file" />
        <input name="id" type="hidden"value="1" />
        <button onclick="uploadFile()">Upload File</button>
    </form>

function uploadFile() {
    $(‘#file-upload-form‘).ajaxSubmit({
        type: "post",
        url: ‘/file_upload‘,
        dataType: "json",
        success: function(resp) {
            alert("a");
        }
    });
}

    /**
     * 测试<br>
     * 异步上传文件
     *
     * @author Deolin
     */
    @RequestMapping(value = "file_upload", method = RequestMethod.POST)
    @ResponseBody
    public void file_upload(@RequestParam MultipartFile file) {
        LOG.info("上传");
    }