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
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<!-- 文件上传 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="UTF-8"/>
</bean>
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再写文件接收的代码
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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<String, String> TypeMap = new HashMap<String, String>();
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);
}
}
}
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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
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<script type="text/javascript" src="js/ajaxfileupload.js"></script>
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文件传输字段必须为file类型，如下：
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<input type="file" id="file" name="file" onchange="ajaxFileUpload();"/>
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其次，处理上传文件：
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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;
} */
});
}
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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
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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('<iframe id="' + frameId + '" name="' + frameId + '" />');
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=$('<iframe name="'+idIO+'" id="'+idIO+'" style="display:none">').appendTo('body');
var jForm=$('<form action="'+s.url+'" target="'+idIO+'" method="post" enctype="multipart/form-data"></form>').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('<form action="'+url+'" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
if(data)
{
for(var i in data)
{
jQuery('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').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("<div>").html(data).evalScripts();
return data;
}
});
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.cnblogs.com/symbol8888/p/6733548.html