20160328 Javaweb Cookie Little Practice

Browsing with cookies for historical records:

Because it is a simple demonstration, the database is replaced directly with JavaBean.

Data storage classes:

Package Com.dzq.dao;import Java.util.*;import Com.dzq.domain.bookbean;public class Bookdao {private static map< String, bookbean> bookmap=new linkedhashmap<string, bookbean> ();p rivate Bookdao () {}static {bookMap.put ("1", New Bookbean ("1", "Kingdoms", "99.0", "belly", "Hippo Publishing", "The Man's Story")), Bookmap.put ("2", New Bookbean ("2", "West Royal Street", "99.0", "Belly squeak", "Hippo Publishing", "The man's Story"); Bookmap.put ("3", New Bookbean ("3", "negligent turn", "99.0", "tripe", "Hippo Publishing", "The Man's Story")); Bookmap.put ("4", New Bookbean ("4", "Pa pa", "99.0", "Ze Zechun", "Hippo Publishing", "The Man's Story");} public static map<string,bookbean> Getbooks () {return bookmap;} public static Bookbean GetBook (String ID) {return bookmap.get (ID);}}

JavaBean class:

Package Com.dzq.domain;import Java.io.serializable;public class Bookbean implements serializable{private String ID;  private string Name;private string Price;private string auth;private string Publish;private string Discribe;public string GetId () {return ID;} public void SetId (String id) {this.id = ID;} Public String GetName () {return name;} public void SetName (String name) {this.name = name;} Public String GetPrice () {return price;} public void Setprice (String price) {this.price = Price;} Public String GetAuth () {return auth;} public void Setauth (String auth) {This.auth = auth;} Public String Getpublish () {return publish;} public void Setpublish (String publish) {this.publish = publish;} Public String Getdiscribe () {return discribe;} public void Setdiscribe (String discribe) {this.discribe = Discribe;} Public Bookbean () {}public Bookbean (string ID, string name, string price, string auth,string Publish, String discribe) {thi S.id = Id;this.name = Name;this.price = Price;this.auth = Auth;this.publish =Publish;this.discribe = Discribe;}} 

Import Java.io.ioexception;import Java.util.map;import Javax.servlet.servletexception;import Javax.servlet.annotation.webservlet;import Javax.servlet.http.cookie;import Javax.servlet.http.HttpServlet; Import Javax.servlet.http.httpservletrequest;import Javax.servlet.http.httpservletresponse;import Com.dzq.dao.bookdao;import Com.dzq.domain.BookBean; @WebServlet ("/booklistservlet") public class Booklistservlet Extends HttpServlet {private static final long serialversionuid = 1l;protected void doget (HttpServletRequest request, Http Servletresponse response) throws Servletexception, IOException {response.setcontenttype ("Text/html;charset=utf-8") ;//query All books and show,map<string,bookbean> Map=bookdao.getbooks (); for (map.entry<string, bookbean> Entry: Map.entryset ()) {Bookbean book=entry.getvalue (); Response.getwriter (). Write ("<a href= ' bookinfoservlet?id=" + Book.getid () + "' >" +book.getname () + "</a><br/>");} Response.getwriter (). Write ("
  
 
Package Com.dzq.servlet;import Java.io.ioexception;import Javax.servlet.servletexception;import Javax.servlet.annotation.webservlet;import Javax.servlet.http.cookie;import Javax.servlet.http.HttpServlet; Import Javax.servlet.http.httpservletrequest;import Javax.servlet.http.httpservletresponse;import Com.dzq.dao.bookdao;import Com.dzq.domain.BookBean; @WebServlet ("/bookinfoservlet") public class Bookinfoservlet   Extends HttpServlet {private static final long serialversionuid = 1L; protected void doget (HttpServletRequest request, httpservletresponse response) throws Servletexception, IOException { Response.setcontenttype ("Text/html;charset=utf-8"); String id=request.getparameter ("id"); Bookbean Book=bookdao.getbook (ID); if (book==null) {response.getwriter (). Write ("Cannot find the book");} Else{response.getwriter (). Write ("
Features: Display the history of the three book information, and in accordance with the order of browsing, the latest browsing in the top row
20160328 Javaweb Cookie Little Practice