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 account; import com.google.gson.JsonArray; import com.google.gson.JsonObject; import java.io.IOException; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.SQLNonTransientConnectionException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import support.DBHelper; /** * * @author bhaumik */ public class IMEWisePS 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 { final String from_date = request.getParameter("from_date"); final String to_date = request.getParameter("to_date"); final String model_cd = request.getParameter("model_cd"); final String brand_cd = request.getParameter("brand_cd"); final String ac_cd = request.getParameter("ac_cd"); final String type_cd = request.getParameter("type_cd"); final String bill_no = request.getParameter("bill_no"); final DBHelper helper = DBHelper.GetDBHelper(); final Connection dataConnection = helper.getConnMpAdmin(); final JsonObject jResultObj = new JsonObject(); if (dataConnection != null) { try { String sql = "select a.FNAME,l.V_DATE,TAG_NO,SR_NAME,PUR_RATE,SALE_RATE,b.BRAND_NAME from tag t left join SERIESMST s on t.sr_cd=s.sr_cd" + " left join MODELMST m on s.model_cd=m.model_cd left join brandmst b on m.brand_cd=b.brand_cd " + " left join LBRPHD l on l.REF_NO=t.PUR_REF_NO left join ACNTMST a on l.AC_CD=a.AC_CD where t.TAG_NO <> ''"; if (bill_no.equalsIgnoreCase("")) { sql += " and l.v_date>='" + from_date + "' and " + " l.v_date<='" + to_date + "'"; } else { sql += " and l.inv_no=" + bill_no; } if (!model_cd.equalsIgnoreCase("")) { sql += " and m.model_cd ='" + model_cd + "'"; } if (!brand_cd.equalsIgnoreCase("")) { sql += " and m.brand_cd ='" + brand_cd + "'"; } if (!ac_cd.equalsIgnoreCase("")) { sql += " and l.ac_cd ='" + ac_cd + "'"; } if (!type_cd.equalsIgnoreCase("")) { sql += " and m.type_cd ='" + type_cd + "'"; } sql += " order by l.v_date"; PreparedStatement pstLocal = dataConnection.prepareStatement(sql); ResultSet rsLocal = pstLocal.executeQuery(); JsonArray array = new JsonArray(); while (rsLocal.next()) { JsonObject object = new JsonObject(); object.addProperty("FNAME", rsLocal.getString("FNAME")); object.addProperty("V_DATE", rsLocal.getString("V_DATE")); object.addProperty("TAG_NO", rsLocal.getString("TAG_NO")); object.addProperty("SR_NAME", rsLocal.getString("SR_NAME")); object.addProperty("BRAND_NAME", rsLocal.getString("BRAND_NAME")); object.addProperty("PUR_RATE", rsLocal.getDouble("PUR_RATE")); object.addProperty("SALE_RATE", rsLocal.getDouble("SALE_RATE")); array.add(object); } jResultObj.addProperty("result", 1); jResultObj.addProperty("Cause", "success"); jResultObj.add("data", array); } catch (SQLNonTransientConnectionException ex1) { jResultObj.addProperty("result", -1); jResultObj.addProperty("Cause", "Server is down"); } catch (SQLException ex) { jResultObj.addProperty("result", -1); jResultObj.addProperty("Cause", ex.getMessage()); } } response.getWriter().print(jResultObj); } // <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> }