How to consume image upload data as byte[] using Spring MVC 3 -

i need write image data in particular directory on server side getting null raw byte[] image upload data trying send html form , jquery ajaxuploader plugin here.

following snippet controller using handle raw bytes of image being uploaded:

@requestmapping(value = "uploadimage", method = requestmethod.post) public void uploadimage(byte[] uploaddata, writer writer, httpservletrequest request) throws ioexception, jsonexception {     //uploaddata turning out null     //.. }  @initbinder protected void initbinder(servletrequestdatabinder binder) {     binder.registercustomeditor(byte[].class,             new bytearraymultipartfileeditor()); } 

i have got following configured in spring configuration file handling uploads:

<bean id="multipartresolver" class="org.springframework.web.multipart.commons.commonsmultipartresolver"> </bean> 

i using spring mvc 3. guide me on how send raw bytes of upload data?

thanks.

first, if you're form uploading image, make sure content type "multipart/form-data". might want change requestmapping follows:

@requestmapping(value = "uploadimage", method = requestmethod.post, headers={"content-type=multipart/form-data"}) 

also, i'd suggest using commonsmultipartfile handle upload. change function signature follows, "fieldname" name of input field in form:

public void uploadimage(byte[] uploaddata, writer writer, httpservletrequest request, @requestparam("fieldname") commonsmultipartfile file) 

then can raw bytes follows:

file.getbytes() 

make sure include commons-fileupload dependency commonsmultipartfile.

i'm using spring3 + jquery ajaxform , works charm. hope helps!