Liferay 6.2: Upload file in portlet

Vietnamese version
The uploading file is an activity frequently. You can use this activity to upload document files (for examples: doc, docx, pdf, png...) or data files (for examples: csv, xls, xlsx, odt,..). There are many ways to upload a file, I will show you my way in this post.

Assume you have a portlet named uploadfile-portlet. This portlet contains view.jsp and UploadFilePortlet.class. Following is the detail of them:

File view.jsp includes some JSP code lines as following:

File view.jsp chứa các dòng code JSP as:

• Line 6^th: This line generates action value and assign for action attribute of the form.
• Line 9-13^th: These lines contain a form with an input component. As you see, this form includes a special attribute, that is the enctype attribute. If you don't include this attribute, the form will not send file data.
• Line 10^th: There is the input tag. The value of type attribute is "file", this component will send file data after submitting. The value of name attribute is a unique in this form, this attribute will be used when reading file data in the controller.

UploadFilePortlet.class called controller, this class contains a method with @ActionMapping annotation. This method will get the file data and do something depend on your opinions. Following is the detail of UploadFilePortlet:

We focus some special lines:
We will take a look at some special lines:

• Line 10^th: The mission of this line is conversion ActionRequest into UploadPortletRequest.
• Line 21^rt: The purpose of this line is getting file data from UploadPortletRequest. The parameter of getFile method is name value of input tag (line 10^th in view.jsp).
• Now, you can do anything with your file.

Click here to download source code

Note by author:

This way applied for MVCPortlet but it doesn't apply for Spring Framework. I will show you the way upload file for Spring framework in next post.