Java tutorial
package com.AlertMailerWebPage.servlet; /* * 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. */ import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject; import com.mongodb.Mongo; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Properties; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * * @author prakharagarwal */ public class Show 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"); try (PrintWriter out = response.getWriter()) { Properties defaultProps = new Properties(); InputStream in = GetProcessSpeed.class.getResourceAsStream("configuration.properties"); defaultProps.load(in); in.close(); String database = (String) defaultProps.get("database_mailerDetails"); String collection = (String) defaultProps.get("collection_mailerDetails"); String serverAddress = (String) defaultProps.get("IP_AMDBoard"); Mongo mongo = new Mongo("localhost", 27017); // Mongo mongo=new Mongo(serverAddress,27017); //DB db = mongo.getDB("dashboard" ); DB db = mongo.getDB(database); DBCollection coll = db.getCollection(collection); //DBCollection coll=db.getCollection("users"); DBObject query = new BasicDBObject("AlertMailer", "PRS"); DBObject query1 = new BasicDBObject("InsertTime", -1); //DBObject query = new BasicDBObject("_id",-1); DBCursor cursor = coll.find(query).sort(query1).limit(1); //String name1= (String)cursor.one().get("name"); //while(cursor.hasNext()){ // out.println(""+cursor.next()+""); //} response.setContentType("text/plain"); response.setCharacterEncoding("UTF-8"); response.getWriter().write(cursor.one().toString()); } } // <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> }