使用ajaxfileupload的一点心得

ajaxfileupload大概是因为很久不更新,所有有不少的问题

1、handlerError not find

这个东西从jQuery1.4之后就已经没有了,所以需要手动添加到ajaxfileupload.js中

(插在js文件内部)

    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)
    {
    	//create frame
    	var frameId = 'jUploadFrame' + id;
            


2、携带参数传递文件

因为ajaxfileupload是创建了form传递的,然而作者并没有把data的内容加入到form中,所以需要手动添加

红色部分为添加的内容,共3处

createUploadForm: function(id, fileElementId,data)
    {
    	//create form 
    	var formId = 'jUploadForm' + id;
    	var fileId = 'jUploadFile' + id;
    	var form = jQuery('
'); var oldElement = jQuery('#' + fileElementId); var newElement = jQuery(oldElement).clone(); jQuery(oldElement).attr('id', fileId); jQuery(oldElement).before(newElement); jQuery(oldElement).appendTo(form); //add data to form if(data){ for(var i in data){ //alert(i+":"+data[i]); $('').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 = s.fileElementId;        
	var form = jQuery.createUploadForm(id, s.fileElementId, s.data);
        var io = jQuery.createUploadIframe(id, s.secureuri);
        var frameId = 'jUploadFrame' + id;
        var formId = 'jUploadForm' + id;  
 
  


3、文件成功上传,然而返回数据却进了error

因为ajaxfileupload的返回参数多了一串

,无法用json格式解析,所以进了error

我的做法是修改了json返回值

 uploadHttpData: function( r, type ) {
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;
        // ifthe type is "script", eval it in global context
        if( type == "script" ){
         jQuery.globalEval( data );
        }
            
        // Get the JavaScript object, ifJSON is used.
        if( type == "json" ){
		var a = data.indexOf("{");
        	var b = data.indexOf("}")+1;
        	data = data.substring(a,b);
        	//alert(data);
            eval("data = " + data);
        }
            
        // evaluate scripts within html
        if( type == "html" ){
         jQuery("
").html(data).evalScripts(); } return data; }


4、ajaxfileupload携带参数传递中文乱码

因为ajaxfileload默认是以ISO-8859-1编码,所以在解析的request的时候要转换成你的编码格式

(用中文编码过滤器没有效果,不懂为什么,希望大神指教!!!)

			for(FileItem file :files){
				String type = file.getContentType();
				if(type!=null) continue;
				if(file.isFormField()){
//					System.out.println(file.getFieldName());
//					System.out.println(file.getString());
					if("painter".equals(file.getFieldName().trim())){
						painter = new String(file.getString().trim().getBytes("ISO-8859-1"),"utf-8");
					}
					if("picname".equals(file.getFieldName().trim())){
						picname = new String(file.getString().trim().getBytes("ISO-8859-1"),"utf-8");
					}
					if("userId".equals(file.getFieldName().trim())){
						userId = new String(file.getString().trim().getBytes("ISO-8859-1"),"utf-8");
					}
				}
			}


5、有些ajaxfileupload.js中的post、json需要大写才能生效,版本太多,需要自己查看js文件


附上完整的ajaxfileupload上传文件代码

前台jsp

			
js文件
function addpic() {
	var picname = $("#can #input_picname").val();
	var picpain = $("#can #input_picpain").val();
	var imgURL = $("#input_pic").val();
	$("#can #input_picname_msg").html("");
	$("#can #input_picpain_msg").html("");
	if (picname == "") {
		$("#can #input_picname_msg").html("作品名称不可为空");
		return;
	}
	if (picpain == "") {
		$("#can #input_picpain_msg").html("作者不可为空");
		return;
	}
	if (imgURL == ""){
		alert("请选择上传的图片");
		return ;
	}
	var suffix = imgURL.substr(imgURL.lastIndexOf(".")+1).toLowerCase();
	if(suffix!="jpg"&&suffix!="png"&&suffix!="gif"&&suffix!="bmp"&&suffix!="jpeg"){
		alert("请上传图片格式的文件");
		return ;
	}
	$.ajaxFileUpload({
		url:"savepic.do",
		type:"POST",
		secureuri:false,
		data:{painter:picpain,picname:picname,userId:userId,},
		fileElementId:'input_pic',
		dataType:"json",
		success:function(data,status){
			alert(data.msg);
			toHref("pictrue/toPictrue.do");
		},
		error:function(data, status, e){
			alert("图片上传失败,请检查网络后重试");
		}
	});
}
服务器端Service

public MyResult savePic(HttpServletRequest req){
		MyResult result = new MyResult();
		
		//图片信息
		picItem item = new picItem();
		String painter = null;
		String picname = null;
		String userId = null;
		String picId = null;
		String fileName = null;
		Date time = null;
		String pictrue = null;
		
		boolean isMultipart = ServletFileUpload.isMultipartContent(req);
		DiskFileItemFactory factory = new DiskFileItemFactory();
//		ServletContext context = req.getSession().getServletContext();
//		//设置临时文件存放地址
//			factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
		ServletFileUpload upload = new ServletFileUpload(factory);
		try {
			//set request encoding
//			req.setCharacterEncoding("utf-8");
			//获取request中的信息
//			upload.parseRequest(req);
//			MultipartHttpServletRequest mRequest = (MultipartHttpServletRequest) req;
//			Listfiles = mRequest.getFiles("file");
//			System.out.println(files.size());
//			for(MultipartFile file :files){
			List files = upload.parseRequest(req);
//			System.out.println(files);
//			System.out.println(files.size());
			for(FileItem file :files){
				String type = file.getContentType();
				if(type!=null) continue;
				if(file.isFormField()){
//					System.out.println(file.getFieldName());
//					System.out.println(file.getString());
					if("painter".equals(file.getFieldName().trim())){
						painter = new String(file.getString().trim().getBytes("ISO-8859-1"),"utf-8");
					}
					if("picname".equals(file.getFieldName().trim())){
						picname = new String(file.getString().trim().getBytes("ISO-8859-1"),"utf-8");
					}
					if("userId".equals(file.getFieldName().trim())){
						userId = new String(file.getString().trim().getBytes("ISO-8859-1"),"utf-8");
					}
				}
			}
			//System.out.println(new String(picname.getBytes("ISO-8859-1"),"utf-8"));
			for(FileItem file :files){
				String type = file.getContentType();
				if(type==null){
					continue;
				}
				picId = acgUtil.createId();
				time = new Date();
				String rootUrl = new SimpleDateFormat("yyyyMMdd").format(time);
				String name = new SimpleDateFormat("HHmmss").format(time);
				fileName = rootUrl+name+userId+".jpg";
				//获得文件储存路径
				String realPath = sc.getRealPath("/");
				realPath +="img/";
				realPath +=(rootUrl+"/");
				//创建文件目录
				File dir = new File(realPath);
				if(!dir.exists()){
					dir.mkdirs();
				}
				//创建文件对象
				File f = new File(realPath,fileName);
				if(f.exists()){
					f.delete();
				}
				//创建文件
				f.createNewFile();
//				file.transferTo(f);
				file.write(f);
				pictrue = "../img/"+rootUrl+"/"+fileName;
				//add pictrue message to mysql
				item.setPictrue(pictrue);
				item.setPainter(painter);
				item.setPicname(picname);
				item.setPictime(new Timestamp(time.getTime()));
				item.setPic_id(picId);
				item.setSubuser_id(userId);
				picDao.savePic(item);
			}	
		} catch (Exception e) {
			e.printStackTrace();
			throw new RuntimeException("图片上传失败",e);
		}
		result.setStatus(0);
		result.setMsg("图片上传成功");
		return result;
	}






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