Spring MVC Pagination

[laura mccord]

What is the best way to implement pagination yet maintaining the Spring MVC methodology? Also, the dataset will not be coming from a database, it will be a hashmap that is set via the controller. Does anyone have any suggestions?

Thanks.

[Bear Bibeault]

Moved to the Application Frameworks forum.

[Vikas Kapoor]

Again, We do have dedicated Spring Forum.
Stay updated

[laura mccord]

oh, I'm sorry. Can my topic be moved there please?

Many Thanks.

[Vikas Kapoor]

laura mccord wrote:What is the best way to implement pagination yet maintaining the Spring MVC methodology? Also, the dataset will not be coming from a database, it will be a hashmap that is set via the controller. Does anyone have any suggestions?

Thanks.

You mean to say it would fetch the data from database for only time?

[laura mccord]

Well, my code is a listing of files/folders that are contained in a given directory path, so a database is not involved. But, once I retrieve all the contents load it in a HashMap, my controller sends the hashmap to my jsp page. I've seen so many examples that are using a database but I haven't seen anything where it's just a list or hashmap. So, I was wondering if this has been done before so I don't have to recreate the wheel.

Thanks

[Vikas Kapoor]

You might want to check Display Tag.

[Mark Spritzler]

Check out the PagedListHolder class. This is a way to get the data and have a page size and sorting.

Mark

[laura mccord]

Thanks for the suggestions.

[Vikas Kapoor]

laura mccord wrote:Thanks for the suggestions.

Just curious, how did you apply the pagination?

[laura mccord]

I actually haven't completed yet.I got sidetracked and I need to accomplish one more thing before I start messing with layout. I was just trying to get suggestions so I know what to start researching. I'll definitely post my result once I finish this step.

Thanks

[Rahul Mishra]

I have used the DisplayTag earlier. If you google the forums you will find that it has been used with Spring MVC quite a bit.


Just download the sample WAR from display tag team , and see if the level of pagination supported in the examples suits your requirements (they have many examples showing various levels of customization to the tag).

What i liked about the tag is that it accepts a partial list (only what is to be displayed on the page) , this is a huge gain in terms of memory.

Check it out..

[laura mccord]

I installed the display tag jar in my webapp and I'm trying to use it correctly. I noticed first thing that I'm able to get my data from the hashmap but it's not building the columns/rows correctly.

   <display:table name="${contents}">
    <c:forEach var="content" items="${contents}">
      <display:column title="Name">${content.value.name} </display:column>
      <display:column title="Size">${content.value.size} </display:column>
      <display:column title="Type">${content.value.type} </display:column>
    </c:forEach>
  </display:table>

Say I want the following to output:

NAME SIZE TYPE
Documents 12 Folder
Desktop 10 Folder
Pictures 9 Folder
Music 23 Folder

Instead, I'm getting the following output using the code snippet above:

NAME SIZE TYPE NAME SIZE TYPE NAME SIZE TYPE NAME SIZE TYPE
Documents 12 Folder Desktop 10 Folder Pictures 9 Folder Music 23 Folder
Documents 12 Folder Desktop 10 Folder Pictures 9 Folder Music 23 Folder
Documents 12 Folder Desktop 10 Folder Pictures 9 Folder Music 23 Folder
Documents 12 Folder Desktop 10 Folder Pictures 9 Folder Music 23 Folder
Documents 12 Folder Desktop 10 Folder Pictures 9 Folder Music 23 Folder

What am I doing wrong?

Thanks.

[laura mccord]

Ugh, I finally got it after during trial and error:

This is what I was supposed to code:

   <display:table name="${contents}" id="content">
      <display:column property="name" title="Name" />
  </display:table>

My problem was that I was still trying to use my old jstl logic of traversing the HashMap and using this method for display:tag . But, display tag is much simpler.