本篇文章主要介绍了SpringMVC结合ajaxfileupload实现文件无刷新上传，具有一定的参考价值，感兴趣的小伙伴们可以参考一下。

jQuery没有提供ajax的文件上传，我们可以通过ajaxfileupload实现ajax文件的上传。其实ajaxfileupload文件上传特别的简单。下面就演示一下在SpringMVC中实现ajax的文件上传。

1、后台接收代码

首先在spring的配置文件中添加文件上传配置

再写文件接收的代码package com.chinaunicom.jlmssp.controller;

import java.io.File;

import java.io.IOException;

import java.util.Arrays;

import java.util.Date;

import java.util.HashMap;

import javax.servlet.ServletContext;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.commons.fileupload.servlet.ServletFileUpload;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.multipart.commons.CommonsMultipartFile;

import com.chinaunicom.jlmssp.model.DataResponse;

import com.chinaunicom.jlmssp.model.JavaToJsMsg;

import com.chinaunicom.jlmssp.model.Org_UserInfo;

import com.chinaunicom.jlmssp.model.Repaly_Expert_Home_Page;

import com.chinaunicom.jlmssp.services.Replay_ExpertManageService;

/**

* 项目复制管理子系统

* 专家云管理

* @author SunYue

* @version 0.1

*/

@Controller

@RequestMapping("/admin/Replay_ExpertManageController.do")

public class Replay_ExpertManageController {

private static final HashMap TypeMap = new HashMap();

static {

TypeMap.put("image", "gif,jpg,jpeg,png,bmp");

TypeMap.put("flash", "swf,flv");

TypeMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");

TypeMap.put("file", "doc,docx,xls,xlsx,ppt,pptx,htm,html,txt,dwg,pdf");

}

@Autowired

Replay_ExpertManageService replayExpertManageService;

/**

* @author sunyue

* @date 2017年2月28日 下午12:49:33

* @Description: 图片上传方法

* @return message: -1 没有文件上传 0 上传成功 1 上传失败 2 文件超过上传大小 3 文件格式错误 4 上传文件路径非法 5 上传目录没有写权限

* @return void 返回类型

*/

@RequestMapping(params = "op=getImageUpload", method = RequestMethod.POST)

public void getImageUpload(@RequestParam("upload") CommonsMultipartFile file,HttpServletRequest request,

HttpServletResponse response) {

if (!file.isEmpty()) {

/*ServletContext servletContext = request.getSession()

.getServletContext();

String uploadPath = servletContext.getRealPath("/")

+ "images\\replay-expert\\";

String upPathString = request.getServletPath(); */

//获取项目工作空间下工程路径的方法，将图片保存到工程路径下

String t=Thread.currentThread().getContextClassLoader().getResource("").getPath();

int num=t.indexOf(".metadata");

String uploadPath=t.substring(1,num).replace('/', '\\')+"jl_mssp_V3_0\\WebContent\\images\\replay-expert\\";

// 文件上传大小

long fileSize = 3 * 1024 * 1024;

if (file.getSize() > fileSize) {

backInfo(response, false, 2, "");

return;

}

String OriginalFilename = file.getOriginalFilename();

String fileSuffix = OriginalFilename.substring(

OriginalFilename.lastIndexOf(".") + 1).toLowerCase();

if (!Arrays.asList(TypeMap.get("image").split(",")).contains(

fileSuffix)) {

backInfo(response, false, 3, "");

return;

}

if (!ServletFileUpload.isMultipartContent(request)) {

backInfo(response, false, -1, "");

return;

}

// 检查上传文件的目录

File uploadDir = new File(uploadPath);

if (!uploadDir.isDirectory()) {

if (!uploadDir.mkdir()) {

backInfo(response, false, 4, "");

return;

}

}

// 是否有上传的权限

if (!uploadDir.canWrite()) {

backInfo(response, false, 5, "");

return;

}

//新文件名

String newname = "";

/*if(null != filePre){

newname += filePre;//对应模块上传的文件名前缀

}*/

newname += "test1111" + "." + fileSuffix;

File saveFile = new File(uploadPath, newname);

try {

file.transferTo(saveFile);

backInfo(response, true, 0, newname);

} catch (Exception e) {

//LOG.error(e.getMessage(), e);

backInfo(response, false, 1, "");

return;

}

} else {

backInfo(response, false, -1, "");

return;

}

}

// 返回信息

private void backInfo(HttpServletResponse response, boolean flag, int message,

String fileName) {

String json = "";

if (flag) {

json = "{ \"status\": \"success";

} else {

json = "{ \"status\": \"error";

}

json += "\",\"fileName\": \"" + fileName + "\",\"message\": \"" + message + "\"}";

try {

response.setContentType("text/html;charset=utf-8");

response.getWriter().write(json);

} catch (IOException e) {

//LOG.error(e.getMessage(), e);

}

}

}

2、前台接受代码

使用ajaxfileupload时，首先下载ajaxfileupload文件，导入对应的js文件

文件传输字段必须为file类型，如下：

其次，处理上传文件：function ajaxFileUpload() {

$.ajaxFileUpload({

type: "POST",

async: false,

data: { "op": 'getImageUpload'},

url:"Replay_ExpertManageController.do",

dataType: 'json',

secureuri: false,

fileElementId: "upload",

success: function(data, status) {

if (data.status == "success") {

//上传成功

alert("上传照片成功");

}

switch(data.message){

//解析上传状态

case "0" : //上传成功

break;

case "-1" : //上传文件不能为空

break;

default: //上传失败

break;

}

return false;

}/* ,

error : function (jqXHR, textStatus, errorThrown) {

//弹出jqXHR对象的信息

alert(jqXHR.responseText);

//alert(jqXHR.status);

//alert(jqXHR.readyState);

//alert(jqXHR.statusText);

//弹出其他两个参数的信息

//alert(textStatus);

alert(errorThrown);

return false;

} */

});

}

三、由于网上的ajaxuploadfile文件都是高版本的，这里将改版完全版文件传上，自己使用jQuery.extend({

handleError: function( s, xhr, status, e ) {

// If a local callback was specified, fire it

if ( s.error ) {

s.error.call( s.context || s, xhr, status, e );

}

// Fire the global callback

if ( s.global ) {

(s.context ? jQuery(s.context) : jQuery.event).trigger( "ajaxError", [xhr, s, e] );

}

},

createUploadIframe: function(id, uri)

{

var frameId = 'jUploadFrame' + id;

if(window.ActiveXObject) {

if(jQuery.browser.version=="9.0")

{

io = document.createElement('iframe');

io.id = frameId;

io.name = frameId;

}

else if(jQuery.browser.version=="6.0" || jQuery.browser.version=="7.0" || jQuery.browser.version=="8.0")

{

var io = document.createElement('');

if(typeof uri== 'boolean'){

io.src = 'javascript:false';

}

else if(typeof uri== 'string'){

io.src = uri;

}

}

}

else {

var io = document.createElement('iframe');

io.id = frameId;

io.name = frameId;

}

io.style.position = 'absolute';

io.style.top = '-1000px';

io.style.left = '-1000px';

document.body.appendChild(io);

return io;

},

ajaxUpload:function(s,xml){

//if((fromFiles.nodeType&&!((fileList=fromFiles.files)&&fileList[0].name)))

var uid = new Date().getTime(),idIO='jUploadFrame'+uid,_this=this;

var jIO=$('').appendTo('body');

var jForm=$('

').appendTo('body');

var oldElement = $('#'+s.fileElementId);

var newElement = $(oldElement).clone();

$(oldElement).attr('id', 'jUploadFile'+uid);

$(oldElement).before(newElement);

$(oldElement).appendTo(jForm);

this.remove=function()

{

if(_this!==null)

{

jNewFile.before(jOldFile).remove();

jIO.remove();jForm.remove();

_this=null;

}

}

this.onLoad=function(){

var data=$(jIO[0].contentWindow.document.body).text();

try{

if(data!=undefined){

data = eval('(' + data + ')');

try {

if (s.success)

s.success(data, status);

// Fire the global callback

if(s.global)

jQuery.event.trigger("ajaxSuccess", [xml, s]);

if (s.complete)

s.complete(data, status);

xml = null;

} catch(e)

{

status = "error";

jQuery.handleError(s, xml, status, e);

}

// The request was completed

if(s.global)

jQuery.event.trigger( "ajaxComplete", [xml, s] );

// Handle the global AJAX counter

if (s.global && ! --jQuery.active )

jQuery.event.trigger("ajaxStop");

// Process result

}

}catch(ex){

alert(ex.message);

};

}

this.start=function(){jForm.submit();jIO.load(_this.onLoad);};

return this;

},

createUploadForm: function(id, url,fileElementId, data)

{

//create form

var formId = 'jUploadForm' + id;

var fileId = 'jUploadFile' + id;

var form = jQuery('

');

if(data)

{

for(var i in data)

{

jQuery('').appendTo(form);

}

}

var oldElement = jQuery('#' + fileElementId);

var newElement = jQuery(oldElement).clone();

jQuery(oldElement).attr('id', fileId);

jQuery(oldElement).before(newElement);

jQuery(oldElement).appendTo(form);

//set attributes

jQuery(form).css('position', 'absolute');

jQuery(form).css('top', '-1200px');

jQuery(form).css('left', '-1200px');

jQuery(form).appendTo('body');

return form;

},

ajaxFileUpload: function(s) {

// TODO introduce global settings, allowing the client to modify them for all requests, not only timeout

// Create the request object

var xml = {};

s = jQuery.extend({}, jQuery.ajaxSettings, s);

if(window.ActiveXObject){

var upload = new jQuery.ajaxUpload(s,xml);

upload.start();

}else{

var id = new Date().getTime();

var form = jQuery.createUploadForm(id,s.url, s.fileElementId, (typeof(s.data)=='undefined'?false:s.data));

var io = jQuery.createUploadIframe(id, s.secureuri);

var frameId = 'jUploadFrame' + id;

var formId = 'jUploadForm' + id;

// Watch for a new set of requests

if ( s.global && ! jQuery.active++ )

{

jQuery.event.trigger( "ajaxStart" );

}

var requestDone = false;

if ( s.global )

jQuery.event.trigger("ajaxSend", [xml, s]);

// Wait for a response to come back

var uploadCallback = function(isTimeout)

{

var io = document.getElementById(frameId);

try

{

if(io.contentWindow)

{

xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;

xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;

}else if(io.contentDocument)

{

xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;

xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;

}

}catch(e)

{

jQuery.handleError(s, xml, null, e);

}

if ( xml || isTimeout == "timeout")

{

requestDone = true;

var status;

try {

status = isTimeout != "timeout" ? "success" : "error";

// Make sure that the request was successful or notmodified

if ( status != "error" )

{

// process the data (runs the xml through httpData regardless of callback)

var data = jQuery.uploadHttpData(xml, s.dataType);

// If a local callback was specified, fire it and pass it the data

if (s.success)

s.success(data, status);

// Fire the global callback

if(s.global)

jQuery.event.trigger("ajaxSuccess", [xml, s]);

if (s.complete)

s.complete(data, status);

} else

jQuery.handleError(s, xml, status);

} catch(e)

{

status = "error";

jQuery.handleError(s, xml, status, e);

}

// The request was completed

if(s.global)

jQuery.event.trigger( "ajaxComplete", [xml, s] );

// Handle the global AJAX counter

if (s.global && ! --jQuery.active )

jQuery.event.trigger("ajaxStop");

// Process result

jQuery(io).unbind();

setTimeout(function()

{ try

{

jQuery(io).remove();

jQuery(form).remove();

} catch(e)

{

jQuery.handleError(s, xml, null, e);

}

}, 100);

xml = null;

}

};

// Timeout checker

if (s.timeout>0)

{

setTimeout(function(){

// Check to see if the request is still happening

if( !requestDone ) uploadCallback("timeout");

}, s.timeout);

}

try

{

var form = jQuery('#' + formId);

jQuery(form).attr('action', s.url);

jQuery(form).attr('method', 'POST');

jQuery(form).attr('target', frameId);

if(form.encoding)

{

jQuery(form).attr('encoding', 'multipart/form-data');

}

else

{

jQuery(form).attr('enctype', 'multipart/form-data');

}

jQuery(form).submit();

} catch(e)

{

jQuery.handleError(s, xml, null, e);

}

jQuery('#'+ frameId).load(uploadCallback);

return {abort: function () {}};

}

},

uploadHttpData: function( r, type ) {

var data = !type;

data = type == "xml" || data ? r.responseXML : r.responseText;

// If the type is "script", eval it in global context

if ( type == "script" )

jQuery.globalEval( data );

// Get the JavaScript object, if JSON is used.

if ( type == "json" ){

eval( "data = " + $(data).html() );

}

// evaluate scripts within html

if ( type == "html" )

jQuery("

").html(data).evalScripts();

return data;

}

});

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