spring mvc ajax file upload
Posted zouhao510
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了spring mvc ajax file upload相关的知识,希望对你有一定的参考价值。
function ajaxFileUploadPic(projectId,name,type) { $.ajaxFileUpload({ url : \'${ctx}/projectPic/saveorupdate.jhtml?projectId=\'+projectId+\'&name=\'+name+\'&type=\'+type, //用于文件上传的服务器端请求地址 secureuri : false, //一般设置为false fileElementId : \'file\', //文件上传空间的id属性 <input type="file" id="file" name="file" /> type : \'post\', dataType : \'json\', //返回值类型 一般设置为json success : function(data, status) //服务器成功响应处理函数 { $("#picList").datagrid(\'reload\'); $(\'#uploadPicWindow\').window(\'close\'); // alert(data.msg); }, error : function(data, status, e)//服务器响应失败处理函数 { $("#picList").datagrid(\'reload\'); $(\'#uploadPicWindow\').window(\'close\'); // alert(data.msg); } }); return false; }
ajaxfileupload.js
jQuery.extend({ createUploadIframe: function(id, uri) { //create frame var frameId = \'jUploadFrame\' + id; var iframeHtml = \'<iframe id="\' + frameId + \'" name="\' + frameId + \'" style="position:absolute; top:-9999px; left:-9999px"\'; if(window.ActiveXObject) { if(typeof uri== \'boolean\'){ iframeHtml += \' src="\' + \'javascript:false\' + \'"\'; } else if(typeof uri== \'string\'){ iframeHtml += \' src="\' + uri + \'"\'; } } iframeHtml += \' />\'; jQuery(iframeHtml).appendTo(document.body); return jQuery(\'#\' + frameId).get(0); }, createUploadForm: function(id, fileElementId, data) { //create form var formId = \'jUploadForm\' + id; var fileId = \'jUploadFile\' + id; var form = jQuery(\'<form action="" 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 s = jQuery.extend({}, jQuery.ajaxSettings, s); var id = new Date().getTime() var form = jQuery.createUploadForm(id, 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; // Create the request object var xml = {} 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] ); } 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 if ( s.complete ) s.complete(xml, status); 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 ); // evaluate scripts within html if ( type == "html" ) jQuery("<div>").html(data).evalScripts(); return data; }, 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] ); } } })
注:如果出现
jQuery.handleError is not a function
原因是,经测试handlerError只在jquery-1.4.2之前的版本中存在,jquery-1.6 和1.7中都没有这个函数了,因此在1.4.2中将这个函数复制到了ajaxFileUpload.js中,问题解决 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] ); } }, 问题2:一直得到error ,无法执行指定的success方法。通过追踪ajaxFileUpload的执行过程发现,在调用它自身的uploadHttpData函数时,当执行if(type=="json") eval("data = "+data); 会抛出异常,导致在处理异常的时候将status = "error" 因此一直执行error方法。 上网查询,得知eval函数是用来执行一段js代码,而并不是如我所想的反解json串 eval("data = "+data);的意思是 将data 赋值给 data参数 ,但是当我返回给页面的是一个简单的字符串,比如"OK" ,时,这样写就抛出异常。最后改为 eval("data = \\" "+data+" \\" ");即将返回的数据用双引号引起来当作字符串,然后赋给 data 。终于成功了。。。
jquery.form.js
http://www.cnblogs.com/sydeveloper/p/3754637.html
http://quarterlifeforjava.iteye.com/blog/2092490
http://blog.csdn.net/tomcat_2014/article/details/50177645
以上是关于spring mvc ajax file upload的主要内容,如果未能解决你的问题,请参考以下文章