How to get file contents from a MultipartHttpServletRequest object?

Question

I would like to upload a file from the web page using this strategy. i.e. Ajax file upload tutorial . It is going all fine, but the issue is on the server side, where I want to open this file and read its contents. I am using the following signature for the method which is called on the submit of the form. i.e.

public @ResponseBody String getFile(MultipartHttpServletRequest request)

Can any body please let me know that how can I extract the contents of the file?

Solution

MultipartHttpServletRequest extends MultipartRequest, which has methods for accessing the files.

You can do this:

MultipartFile file = request.getFile(paramName);

See http://docs.spring.io/spring-framework/docs/3.2.0.M1/api/org/springframework/web/multipart/MultipartRequest.html