How to create DataGrid or GridView in JSP – Servlet

To create a DataGrid or GridView in JSP using Servlet, you can follow these steps:

Create a JSP file (e.g., datagrid.jsp) to display the grid view:

   <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
   <!DOCTYPE html>
   <html>
   <head>
       <title>DataGrid Example</title>
   </head>
   <body>
       <table>
           <tr>
               <th>Column 1</th>
               <th>Column 2</th>
               <th>Column 3</th>
           </tr>
           <% for (YourDataModel data : dataList) { %>
               <tr>
                   <td><%= data.getColumn1() %></td>
                   <td><%= data.getColumn2() %></td>
                   <td><%= data.getColumn3() %></td>
               </tr>
           <% } %>
       </table>
   </body>
   </html>

In this example, a simple HTML table is created to display the data in the grid view. You can customize the table structure and design based on your requirements. The <% %> tags are used to embed Java code within the JSP to iterate over the data list and populate the table rows.

Create a Servlet (e.g., DataServlet) to retrieve data and forward it to the JSP:

   import java.io.IOException;
   import java.util.ArrayList;
   import java.util.List;
   import javax.servlet.ServletException;
   import javax.servlet.annotation.WebServlet;
   import javax.servlet.http.HttpServlet;
   import javax.servlet.http.HttpServletRequest;
   import javax.servlet.http.HttpServletResponse;

   @WebServlet("/DataServlet")
   public class DataServlet extends HttpServlet {
       protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
           // Retrieve data from your data source
           List<YourDataModel> dataList = fetchData();

           // Set the data as an attribute in the request
           request.setAttribute("dataList", dataList);

           // Forward the request to the JSP
           request.getRequestDispatcher("datagrid.jsp").forward(request, response);
       }

       private List<YourDataModel> fetchData() {
           // Fetch data from your data source (e.g., database)
           // Create a list of YourDataModel objects
           List<YourDataModel> dataList = new ArrayList<>();

           // Add data to the list
           dataList.add(new YourDataModel("Value 1", "Value 2", "Value 3"));
           dataList.add(new YourDataModel("Value 4", "Value 5", "Value 6"));
           // ...

           return dataList;
       }
   }

In this example, the doGet method of the servlet retrieves the data from your data source (e.g., database) by calling the fetchData method. The data is then set as an attribute in the request with the name “dataList”. Finally, the request is forwarded to the datagrid.jsp page.

Map the Servlet in the web.xml deployment descriptor:

   <servlet>
       <servlet-name>DataServlet</servlet-name>
       <servlet-class>com.example.DataServlet</servlet-class>
   </servlet>
   <servlet-mapping>
       <servlet-name>DataServlet</servlet-name>
       <url-pattern>/datagrid</url-pattern>
   </servlet-mapping>

In the web.xml file, configure the servlet by providing the servlet class and mapping it to a URL pattern (“/datagrid” in this example).

4. Access the grid view by accessing the URL mapped to the servlet (e.g., http://localhost:8080/your-app/datagrid).

Make sure to replace the placeholders (e.g., YourDataModel, column names) with your actual data model and column names.

This example demonstrates a basic implementation of a grid view using JSP and Servlet. You can enhance and customize the code based on your specific requirements, such as retrieving data from a database or integrating with other frameworks and libraries for advanced features like sorting, pagination, or filtering.