Ajaxfileupload upload with parameter file and JS verify file size

 This snippet is for spring boot+hibernate, build with Maven 
 One: 
 Ajaxfileupload to implement a no-flush asynchronous commit file, build an iframe and create a form form Then submit the file that you want to upload. But the original code did not process data. So this piece of content needs to be added by ourselves. The following Red section is the three places to modify Ajaxfileupload.js: (contrast source modification) 1. createuploadform:function (ID, fileelementid,data);  2.if (data) {for (var i in data) {$ (' <input type= ' hidden "name=" ' +        i + ' "value=" ' + data[i] + ' "/> '). AppendTo (form); }}  3. var form = Jquery.createuploadform (ID, s.fileelementid,s.data);  
 HTML section: 
 <form id= "Form1" runat= "Server" method= "POST" enctype= "multipart/ Form-data " >  
 <div>  
 <div class=" _box "> select picture </div>  
 </div >  
 <div class= "None" >  
 <input type= "file" Name= "FileID" id= "FileID"/>&NBSP; 

</div>
</form>
Two:

$.ajaxfileupload ({

                    URL: ' url ',                     type: ' Post ',                    data: {                        url:url                    },                    Secureuri:false,//general set to False                    Fileelementid: ' FileID ',//upload the file ID, Name property name                    dataType: ' json ',//return value type, generally set to JSON, Application/json  here to use uppercase  or will not get the returned data                    success:function (data, status) {                          alert (data);                    },                    error:function (data, status, E) {                         alert ( e);                    }                );
Save Directory as E:\saveIMG

@ResponseBody
@RequestMapping ("/addandupload")
Public String addandupload (@RequestParam (value= "uploadimg", Required=false) multipartfile file) {
String filename = File.getoriginalfilename ();
String filepath = "e:\\saveimg\\"; File Upload Save Directory
if (!file.isempty ()) {//Determine if there is a file upload
try {
byte[] bytes = File.getbytes ();
Bufferedoutputstream stream = new Bufferedoutputstream (new FileOutputStream (New File (filepath, filename));
Stream.Write (bytes);
Stream.Close ();
} catch (Exception e) {
E.printstacktrace ();
}

}

The page displays multiple server pictures:

One:

The IMG tag of the HTML page is used in the SRC

Back-end Http://127.0.0.1:8080/foodmain/findimg?name? method

@ResponseBody
@RequestMapping ("/findimg")
public void findimg (HttpServletResponse response,string name) throws ioexception{
File Filepic = new file ("e:\\saveimg\\" +name);
if (filepic.exists ()) {
FileInputStream is = new FileInputStream (filepic);
int i = is.available (); Get File size
byte data[] = new Byte[i];
Is.read (data); Read data
Is.close ();
Response.setcontenttype ("image/*"); Set the returned file type
OutputStream toclient = Response.getoutputstream (); Gets the object that outputs the binary data to the client
Toclient.write (data); Output data
Toclient.close ();
}
}

JS verification upload File size, reference: http://zhuchengzzcc.iteye.com/blog/1573360

Ajaxfileupload upload with parameter file and JS verify file size