bookUtilities.HomePageBooksServlet.java Source code

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Here is the source code for bookUtilities.HomePageBooksServlet.java

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/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package bookUtilities;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;

/**
 *
 * @author Ryan Hothan
 */
@WebServlet(urlPatterns = { "/HomePageBooksServlet" })
public class HomePageBooksServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        //Get the top four most recently added books
        JSONArray newestBooks = getNewestBooks();
        //Gets the top four most checked out books
        getPopularBooks(newestBooks);
        //Returns the data to the front end
        PrintWriter printout = response.getWriter();
        printout.print(newestBooks);
        printout.flush();
    }

    private JSONArray getNewestBooks() {
        JSONArray jsons = new JSONArray();
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

            Connection con = DriverManager.getConnection("jdbc:sqlserver://localhost;user=sa;password=nopw");

            Statement st = con.createStatement();

            String query = "SELECT TOP 4 * " + "FROM [HardCover].[dbo].[Book] " + "WHERE Active =1 "
                    + "ORDER BY DateAdded DESC;";

            ResultSet rs = st.executeQuery(query);

            while (rs.next()) {
                JSONObject bookToAdd = new JSONObject();
                Statement st2 = con.createStatement();
                String bookId = rs.getString("BookUuid");
                query = "SELECT AuthorName " + "FROM [HardCover].[dbo].[Author] " + "WHERE BookId = '" + bookId
                        + "';";
                ResultSet rs2 = st2.executeQuery(query);
                rs2.next();
                bookToAdd.put("author", rs2.getString("AuthorName"));
                bookToAdd.put("title", rs.getString("Title"));
                bookToAdd.put("cover", rs.getString("Cover"));
                bookToAdd.put("language", rs.getString("BookLanguage"));
                bookToAdd.put("description", rs.getString("BookDescription"));
                bookToAdd.put("publisher", rs.getString("Publisher"));
                bookToAdd.put("dateAdded", rs.getString("DateAdded"));
                bookToAdd.put("bookId", rs.getString("BookUuid"));
                jsons.add(bookToAdd);
            }
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
        return jsons;
    }

    private void getPopularBooks(JSONArray jsons) {
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

            Connection con = DriverManager.getConnection("jdbc:sqlserver://localhost;user=sa;password=nopw");

            Statement st = con.createStatement();

            String query = "SELECT TOP 4 * " + "FROM [HardCover].[dbo].[Book] " + "WHERE Active =1 "
                    + "ORDER BY TimesBorrowed DESC;";

            ResultSet rs = st.executeQuery(query);

            while (rs.next()) {
                JSONObject bookToAdd = new JSONObject();
                String bookId = rs.getString("BookUuid");
                Statement st2 = con.createStatement();
                query = "SELECT AuthorName " + "FROM [HardCover].[dbo].[Author] " + "WHERE BookId = '" + bookId
                        + "';";
                ResultSet rs2 = st2.executeQuery(query);
                rs2.next();
                bookToAdd.put("author", rs2.getString("AuthorName"));
                bookToAdd.put("title", rs.getString("Title"));
                bookToAdd.put("cover", rs.getString("Cover"));
                bookToAdd.put("language", rs.getString("BookLanguage"));
                bookToAdd.put("description", rs.getString("BookDescription"));
                bookToAdd.put("publisher", rs.getString("Publisher"));
                bookToAdd.put("dateAdded", rs.getString("DateAdded"));
                bookToAdd.put("bookId", rs.getString("BookUuid"));
                jsons.add(bookToAdd);
            }
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}