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package com.listener;
 
import javax.servlet.http.HttpSession;
import net.sf.json.JSONObject;
import org.apache.commons.fileupload.ProgressListener;
 
public class AjaxProgressListener implements ProgressListener {
 
    public static final String STATUS_UPLOADING = "UPLOADING";
    public static final String STATUS_FAILED = "FAILED";
    public static final String STATUS_DONE = "DONE";
    public static final String STATUS_MAX_SIZE_EXCEEDS = "MAX_SIZE_EXCEEDS";
 
    private HttpSession session;
 
    public void setSession(HttpSession session){
	this.session = session;
    }
 
    public void updateStatus(String status){
	session.setAttribute("progressStatus", status);
    }
 
    public void update(long bytesRead, long contentLength, int item) {
        JSONObject progressMap = new JSONObject();
	progressMap.set("bytesRead", bytesRead);
	progressMap.set("contentLength", contentLength);
	progressMap.set("item", item);
	session.setAttribute("progressMap", progressMap);
 
	if(bytesRead == contentLength) {
		session.setAttribute("progressStatus", STATUS_DONE);
	}
    }
}
 

 
package com.resolver;
 
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUpload;
import org.springframework.web.multipart.MaxUploadSizeExceededException;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
 
import com.listener.AjaxProgressListener;
 
 
public class AjaxMultipartResolver extends CommonsMultipartResolver {
    private AjaxProgressListener progressListener;
    private HttpServletRequest httpServletRequest;
 
    public void setProgressListener(AjaxProgressListener progressListener) {
        this.progressListener = progressListener;
    }
 
    public AjaxProgressListener getProgressListener() {
        return progressListener;
    }
 
    public MultipartHttpServletRequest resolveMultipart(HttpServletRequest request) throws MultipartException {
        try {
            this.httpServletRequest = request;
 
            return super.resolveMultipart(request);
        } catch(MaxUploadSizeExceededException ex) {
        	 this.progressListener.updateStatus(AjaxProgressListener.STATUS_MAX_SIZE_EXCEEDS);
             throw new MultipartException(ex.getMessage());
        } catch (Exception ex) {
            //exception is typically thrown when user hits stop or cancel
            //button halfway through upload
            this.progressListener.updateStatus(AjaxProgressListener.STATUS_FAILED);
            throw new MultipartException(ex.getMessage());
        }
    }
}
 
 

 
<bean id="multipartResolver" class="com.resolver.AjaxMultipartResolver">
        <property name="maxInMemorySize">
		<!-- Max in memory 10kbytes -->
		<value>10240</value>
	</property>
	<property name="maxUploadSize">
		<!--  10 MB Max upload size -->
		<value>1024000000</value>
	</property>
	<!--
        <property name="uploadTempDir">

		<value>/tmp</value>
	</property>
        -->
	<property name="progressListener">
		<ref bean="progressListener" />
	</property>
</bean>
 
<bean id="progressListener" class="com.listener.AjaxProgressListener"/>
 

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