显示商品历史浏览记录
废话不多说，直接上代码
package cn.itcast.cookie;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//清除cookie
public class CookieDemo3 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
//输出所有商品
out.write("本站有如下商品:<br/>");
Map<String,Book>map=Db.getAll();
for(Map.Entry<String, Book> entry:map.entrySet()){
Book book=entry.getValue();
out.print("<a target=\"_blank\" href='/day07/servlet/cookieDemo4?id="+book.getId()+"'>"+book.getName()+"</a><br/>");
}
//显示用户看过的商品
out.print("<br/>你曾经看过的商品<br/>");
Cookie cookies[]=request.getCookies();
for(int i=0;cookies!=null && i<cookies.length;i++){
if(cookies[i].getName().equals("bookHistory")){
String ids[]=cookies[i].getValue().split("\\,");//2,3,1
for(String id:ids){
Book book=(Book) Db.getAll().get(id);
out.print("<a target=\"_blank\" href='/day07/servlet/cookieDemo4?id="+book.getId()+"'>"+book.getName()+"</a><br/>");
}
}
}
}
}
class Db{
private static Map<String,Book> map=new LinkedHashMap<String,Book>();
static {
map.put("1", new Book("1","JavaWeb开发","老k","一本好书"));
map.put("2", new Book("2","jdbc开发","老张","一本好书"));
map.put("3", new Book("3","spring开发","老li","一本好书"));
map.put("4", new Book("4","struts开发","老张","一本好书"));
map.put("5", new Book("5","android开发","老bi","一本好书"));
}
public static Map getAll(){
return map;
}
}
class Book{
private String id;
private String name;
private String author;
private String description;
public Book() {
super();
}
public Book(String id, String name, String author, String description) {
this.id = id;
this.name = name;
this.author = author;
this.description = description;
}
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 getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
package cn.itcast.cookie;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//显示详细信息的servlet
public class Coo
补充：综合编程 , 其他综合 ,
