Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package User; 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(name = "AccountListHelper", urlPatterns = { "/AccountListHelper" }) public class AccountListHelper 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"); JSONArray jsons = new JSONArray(); try { String accountNumber = request.getParameter("accountNumber"); 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 * " + "FROM [MatchesFromAbove].[dbo].[Account] " + "WHERE AccountNumber = '" + accountNumber + "'"; ResultSet rs = st.executeQuery(query); while (rs.next()) { if (!rs.getBoolean("Active")) { continue; } JSONObject accountToAdd = new JSONObject(); accountToAdd.put("accountNumber", rs.getInt("AccountNumber")); accountToAdd.put("creditCardNumber", rs.getString("CreditCardNumber")); accountToAdd.put("accountCreationDate", rs.getString("AccountCreationDate")); jsons.add(accountToAdd); } response.setContentType("application/json"); PrintWriter printout = response.getWriter(); printout.print(jsons); printout.flush(); } 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> }