利用ajax实现文件上传

1 . 先看效果（这个效果需要添加Ace的css，这里就不提供源代码了）

2． 导入上传所需的jar包

3 . 配置servlet.xml（不是web.xml）

4 . 引入ajaxfileupload.js

4 . 上传的输入框

 

5 . ajax传文件传文件到后台

$("#save_uploadFile").click(function(){
	
		var path = $("#path").val();
		//$("#uploadFileForm").attr("action","uploadFlie")
		if($("#uploadFlie").val()==""){
			confirm("Please select you excel for import");
			 window.location.reload();
			
			
		}else{
			
			$.ajaxFileUpload({  
			    type: "POST",  
			    url:path+"/upload/uploadFlie",  
			    secureuri : false,//是否启用安全提交，默认为false 
			    fileElementId:'uploadFlie',//上传的file id属性
			    dataType: 'json',
			    async : false,
			    success: function(data){  
			      if(data.a==520){
			    	  confirm("Upload successful");
			    	  window.location.reload();
			      }else if(data.a==417){
			    	  alert("请选择和数据库表字段对应的Excel表");
			    	  window.location.reload();
			      }else{
			    	  alert("Excel表字段和数据表不对应，请重新选择");
			    	  window.location.reload();
			      }
			       
			    },  
			    error: function(XMLHttpRequest, textStatus, errorThrown) {
					 alert("XMLHttpRequest.status:"+XMLHttpRequest.status+"\n"+"XMLHttpRequest.readyState:"+XMLHttpRequest.readyState+"\n"
							 +"textStatus:"+textStatus);

					   }
			}); 
		}
		
	})

6 . 后台接收处理文件

	@ResponseBody
	@RequestMapping(value = "/uploadFlie")
	public UserHibernateVO upload(@RequestParam(value = "file", required = false) MultipartFile[] file, HttpSession session,HttpServletRequest req,ModelMap model) {
		
	  model.addAttribute("message"," ");
	  MultipartFile File = file[0];
      if(File==null){
			System.out.println("file null");
		}
		String fileName = File.getOriginalFilename();
         String suffix = fileName.substring(fileName.lastIndexOf("."));
         UserHibernateVO vo = null;;
         InputStream in = null;
         System.out.println("fileName========="+fileName);
         System.out.println("suffix========"+suffix);
		if(fileName.endsWith(".xlsx")||fileName.endsWith(".xls")){

			try {
				vo = new UserHibernateVO();
				in = File.getInputStream();
				iStudentManagerService.saveStudentByExcel(in, suffix);
				vo.setA(520);
				model.addAttribute("message"," upload successful");
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}else{
			vo = new UserHibernateVO();
			vo.setA(417);
			model.addAttribute("message"," upload failed");
		}
			
		return vo;
	}

7 . 接收如何处理自己看着办，OK，这次的用ajax上传文件已经讲解完成，谢谢您的支持