Wednesday, 19 February 2014

Display Tag Pagination and Sorting Example


Here is  JSP page to display two dynamic tables using display tag.  <display:table>  tag is used create tables, while <display:column> tag is used create columns. You can make a column sortable by specifying attribute sortable="true" , you can define as many column as you like. If number of column is configurable, you can even use foreach tag from JSTL to loop through configuration data and create columns. Another important attribute is pagesize="5" , which defines how many rows each page will contain, if your data set has more rows than specified by this attribute, then it will appear in next page. You can use this attribute to control pagination in your application. Normally you should keep size so that it can take at-least 3/4th of page and rest can be used for other controls.   There is another attribute of display table tag, export, which is used to control export functionality. If you set this attribute as export=true then display tag will show export option for the table, which allows you to export data in pdf, csv, xml and excel format.  For simplicity reason, I have used scriptlet to generate data and populate into list, which will be provided to display tag using a session scope attribute. You should not use Java code inside JSP in production code, instead all your code to generate data should reside in model classes or Servlets. Our first table read data from sessionscope.players attribute and second table read data from sessionscope.stars attribute, which is actuallyList implementations, ArrayList in our case.
      
dependency: 
1) display tag library
2) JSTL core tag library

You can download display tag from http://displaytag.sf.net website, and it comes with all internal dependency e.g. JARs required for creating PDF document or  iText library, Microsoft word and excel document support using Apache POI library and others. I am also using CSS files like displaytag.css, which comes along display tag examples, if you download the JAR.

<%@page import="java.util.ArrayList"%>
<%@page import="com.web.revision.Contact"%>
<%@page import="java.util.List"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@ taglib prefix="display" uri="http://displaytag.sf.net" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
    "http://www.w3.org/TR/html4/loose.dtd">

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Display tag Pagination and Sorting Example in JSP</title>
        <link rel="stylesheet" href="css/displaytag.css" type="text/css">
        <link rel="stylesheet" href="css/screen.css" type="text/css">
        <link rel="stylesheet" href="css/site.css" type="text/css">

    </head>
    <body>

        <%
            List<Contact> players = new ArrayList<Contact>();
            players.add(new Contact("Virat", 98273633, "Mohali"));
            players.add(new Contact("Mahendara", 98273634, "Ranchi"));
            players.add(new Contact("Virender", 98273635, "Delhi"));
            players.add(new Contact("Ajinkya", 98273636, "Jaipur"));
            players.add(new Contact("Gautam", 98273637, "Delhi"));
            players.add(new Contact("Rohit", 98273638, "Mumbai"));
            players.add(new Contact("Ashok", 98273639, "Kolkata"));
            players.add(new Contact("Ravi", 98273640, "Chennai"));

            session.setAttribute("players", players);
            
            List<Contact> stars = new ArrayList<Contact>();
            stars.add(new Contact("Shahrukh", 98273633, "Delhi"));
            stars.add(new Contact("Sallu", 98273634, "Ranchi"));
            stars.add(new Contact("Roshan", 98273635, "Delhi"));
            stars.add(new Contact("Devgan", 98273636, "Jaipur"));
            stars.add(new Contact("Hashmi", 98273637, "Delhi"));
            stars.add(new Contact("Abraham", 98273638, "Mumbai"));
            stars.add(new Contact("Kumar", 98273639, "Kolkata"));
            stars.add(new Contact("Shetty", 98273640, "Chennai"));
           
            session.setAttribute("stars", stars);

        %>



        <div id='tab1' class="tab_content" style="display: block; width: 100%">
            <h3>Display tag Pagination and Sorting Example</h3>
            <p>This is FIRST TABLE </p>
            <display:table name="sessionScope.players" pagesize="5"
                           export="true" sort="list" uid="one">
                <display:column property="name" title="Name"
                                sortable="true" headerClass="sortable" />
                <display:column property="contact" title="Mobile"
                                sortable="true" headerClass="sortable" />
                <display:column property="city" title="Resident"
                                sortable="true" headerClass="sortable" />
            </display:table>
        </div>
       
        <div id='tab2' class="tab_content" style="width: 100%">
            <h3>Table 2</h3>
            <p>This is SECOND TABLE</p>
            <display:table name="sessionScope.stars" pagesize="5"
                           export="false" sort="list" uid="two">
                <display:column property="name" title="Name"
                                sortable="true" headerClass="sortable" />
                <display:column property="contact" title="Mobile"
                                sortable="true" headerClass="sortable" />
                <display:column property="city" title="Resident"
                                sortable="true" headerClass="sortable" />
            </display:table>
        </div>
    </body>
</html>


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