package com.Servlect;
/**
 * A202020895
 */
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Servlet implementation class ServlectA
 */
@WebServlet("/ServlectA")
public class ServlectA extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServlectA() {
        super();
        // TODO Auto-generated constructor stub
        System.out.println("ServlectA()的登录界面");
        System.out.println("进入ServlectA的主界面");
    }
  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    response.setContentType("text/html");
    response.setCharacterEncoding("UTF-8");
    PrintWriter pw=response.getWriter();
    pw.append("<h1 align ='center' style='color:red'>欢迎来到登陆界面</h1>");
    pw.append("<form action=\"ServlectB\" method=\"get\" style=\"background: pink; font-size: 14px;\">\r\n" + 
        "   姓名:<input type=\"text\" name=\"name\"style=\"color: green;\"><br>\r\n" + 
        "   密码:<input type=\"text\" name=\"password\"  style=\"color: purple;\"><br>\r\n" + 
            "再次输入密码:<input type=\\\"text\" name=\"passwords\"  style=\\\"color: pink;<br>"+
        "   <input type=\"submit\" value=\"提交\">" + 
        " </form>"
        + "<h1>autor 实践出总结 </h1>");
  }
  /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    doGet(request, response);
  }
}

package com.Servlect;
/**
 * A202020895
 * 2021/10/19
 */
import java.io.IOException;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.Map;
import java.util.Map.Entry;
import javax.naming.InitialContext;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.omg.PortableInterceptor.RequestInfo;
public class ServlectB extends HttpServlet {
  public ServlectB() {
    // TODO Auto-generated constructor stub
    System.out.println("ServlectB在运行");
    System.out.println("开试运行代码程序· 进行判断");
  }
  @Override
  protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    //获取数据
    resp.setContentType("text/html");
    resp.setCharacterEncoding("UTF-8");
    ServletContext  sc=getServletContext();
    //获取web.xml文件中的镜头数据
    String a=sc.getInitParameter("names");
    String b=sc.getInitParameter("pws");
    String c=sc.getInitParameter("pwsa");
    System.out.println(a+"@@@@@@@@"+b+"######"+c);
    resp.getWriter().append("ServletB获得静态数据用来访问name:"+a);
    resp.getWriter().append("ServletB获得静态数据用来访问pws:"+b);
    resp.getWriter().append("ServletB获得静态数据用来访问pwsa:"+b);
     String aa=req.getParameter("name");
     String bb=req.getParameter("password");
     String cc=req.getParameter("passwords");
      System.out.println(aa+":"+bb+":"+cc);
      //不区分大小写equalsIgnoreCase(aa)
      if(a.equalsIgnoreCase(aa)&&b.equalsIgnoreCase(bb)&&c.equalsIgnoreCase(cc)) {
        //重定向跳转页面
        resp.sendRedirect("ServlectA");
      }else {
        resp.sendRedirect("ServlectC");
      }
  }
}

package com.Servlect;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Servlet implementation class ServlectC
 */
@WebServlet("/ServlectC")
public class ServlectC extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ServlectC() {
        super();
        System.out.println("登录失败进入ServlectC界面");
        // TODO Auto-generated constructor stub
    }
  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // 定义登录界面失败内容
    response.setContentType("text/html");
    response.setCharacterEncoding("UTF-8");
    PrintWriter pw=response.getWriter();
    pw.append("<h1 align ='center' style='color:red'>跳转至ServletC,显示\"登陆失败,用户名不存在或者密码错误,内"
        + "容不正确重新开始登录</h1>");
    response.setHeader("refresh","5;URL=ServlectA");
  }
  /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    doGet(request, response);
  }
}

package com.entity;
/**
 * 
 * 图书实体类
 * @author MZFAITHDREAM
 * 2021/10/19
 *
 */
public class Book {
   private String bookName;  //书名
   private  String autor;   //作者
   private  String price;
   private  String address;//出版社
   private  String buyTime;   //图书时间
  //生成get set方法
  //null构造方法 创建对象 在创建对象
   //toString
  public Book() {
    // TODO Auto-generated constructor stub
  }
  public Book(String bookName, String autor, String price, String address, String buyTime) {
    super();
    this.bookName = bookName;
    this.autor = autor;
    this.price = price;
    this.address = address;
    this.buyTime = buyTime;
  }
  public String getBookName() {
    return bookName;
  }
  public void setBookName(String bookName) {
    this.bookName = bookName;
  }
  public String getAutor() {
    return autor;
  }
  public void setAutor(String autor) {
    this.autor = autor;
  }
  public String getPrice() {
    return price;
  }
  public void setPrice(String price) {
    this.price = price;
  }
  public String getAddress() {
    return address;
  }
  public void setAddress(String address) {
    this.address = address;
  }
  public String getBuyTime() {
    return buyTime;
  }
  public void setBuyTime(String buyTime) {
    this.buyTime = buyTime;
  }
  @Override
  public String toString() {
    return "Book [bookName=" + bookName + ", autor=" + autor + ", price=" + price + ", address=" + address
        + ", buyTime=" + buyTime + "]";
  }

package com.entity;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
 * 定义手机名称  手机型号 手机的色彩    价格
 * @author MZFAITHDREAM
 *定义一个标准类
 */
public class phone {
  private String pname;//手机名称
  private String pmodel;
  private String color;
  private String price;
  private String land; //手机厚度
  public phone() {
    // TODO Auto-generated constructor stub
  }
  public phone(String pname, String pmodel, String color, String price, String land) {
    super();
    this.pname = pname;
    this.pmodel = pmodel;
    this.color = color;
    this.price = price;
    this.land = land;
  }
  public String getPname() {
    return pname;
  }
  public void setPname(String pname) {
    this.pname = pname;
  }
  public String getPmodel() {
    return pmodel;
  }
  public void setPmodel(String pmodel) {
    this.pmodel = pmodel;
  }
  public String getColor() {
    return color;
  }
  public void setColor(String color) {
    this.color = color;
  }
  public String getPrice() {
    return price;
  }
  public void setPrice(String price) {
    this.price = price;
  }
  public String getLand() {
    return land;
  }
  public void setLand(String land) {
    this.land = land;
  }
  @Override
  public String toString() {
    return "phone [pname=" + pname + ", pmodel=" + pmodel + ", color=" + color + ", price=" + price + ", land="
        + land + "]";
  }
  public String getTime() {
    // TODO Auto-generated method stub
    Date date=new Date();
    //2021年10月19日
    SimpleDateFormat sdf=new SimpleDateFormat ("YYYY年MM月DD日HH:mm:ss");
    //要求当前时间进行格式化
    String time=sdf.format(date);
    return null;
  }
  public void setBuyTime(String time) {
    // TODO Auto-generated method stub
    //2021年10月19日
  }
}

package com.Servlet;
import java.io.IOException;
import java.io.PrintWriter;
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 com.entity.Book;
/**
 * Servlet implementation class AlertServlet
 */
@WebServlet("/AlertServlet")
public class AlertServlet extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public AlertServlet() {
        super();
        // TODO Auto-generated constructor stub
    }
  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    Book book=(Book) request.getAttribute("book");
    String info="<h1>当前《"+book.getBookName()+"书籍购买成功，如需需要再次购买请<a href='ShowBuyBookServlet'>点击这里</a>回到购书页面,"
        + "或者10秒之后自动跳转至首页</h1>";
    response.setContentType("text/html");
    response.setCharacterEncoding("UTF-8");
    //
    response.setHeader("refresh", "1"+"开始倒计时");
    //五秒后自动跳转到HomeServlet
    response.setHeader("refresh", "10;url=HomeServlet");
    PrintWriter pw=response.getWriter();
    pw.print(info);
  }
  /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    doGet(request, response);
  }
}

package com.Servlet;
import java.io.IOException;
import java.sql.Connection;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletContext;
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 com.entity.Book;
import com.util.BooksDBUtil;
/**
 * Servlet implementation class GetBuyBookInfoServlet
 */
@WebServlet("/GetBuyBookInfoServlet")
public class GetBuyBookInfoServlet extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public GetBuyBookInfoServlet() {
        super();
        // TODO Auto-generated constructor stub
    }
  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    //获得浏览器发送的下标
    String index=request.getParameter("index");
    int i=Integer.parseInt(index);
    //根据下标从书库中定位到用户要购买的是哪本书
    List<Book> oBooks=BooksDBUtil.getBooks();
    Book book=oBooks.get(i);
    //获得当前购买的实时时间
    String time=BooksDBUtil.getNowTime();
    book.setBuyTime(time);
    //存储至ServletContext对象中
    ServletContext sc=getServletContext();
    //先判断ServletContext是否有其他的购买记录
    //如果有，新的购买记录只需要添加到原有的list集合里面
    //如果没有，现在是第一次买书，ServletContext之前没有保存过购买记录，也就意味着该对象中并不存在list集合
    Object object=sc.getAttribute("orders");
    List<Book> oList=null;
    if (object==null) {
      //说明从来都没有保存过购买记录
      oList=new ArrayList<Book>();
      oList.add(book);
    }else {
      //如果以前有保存过购买记录
      oList=(List<Book>) object;
      oList.add(book);
    }
    //将更新后的list集合保存至ServletContext对象
    sc.setAttribute("orders", oList);
    //跳转至一个Servlet页面，告诉用户当前购买成功，如需再次购买请点击这里回到购书页面
    //如果Servlet之间跳转不需要携带数据，传递数据，一般使用重定向
    //否则使用请求转发
    request.setAttribute("book", book);
    request.getRequestDispatcher("AlertServlet").forward(request, response);
  }
  /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    doGet(request, response);
  }
}

package com.Servlet;
/**
 * 浏览数据的主界面
 */
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Servlet implementation class HomeServlet
 */
@WebServlet(urlPatterns = "/HomeServlet",initParams = {
    @WebInitParam(name="buyBook",value="购买图书"),
    @WebInitParam(name="selectOrder",value="查看记录"),
    //增加一个界面为手机管理
    @WebInitParam(name="buyBookA",value="购买图书A ")
})
public class HomeServlet extends HttpServlet {
  private static final long serialVersionUID = 1L;
  String buyBook ="";
  String buyBookA ="";
  String  selectOrder="";
    /**
     * @see HttpServlet#HttpServlet()
     */
    public HomeServlet() {
        super();
        System.out.println("HomeServlet() 在运行主界面中");
        // TODO Auto-generated constructor stub
    }
    @Override
    public void init(ServletConfig config) throws ServletException {
      super.init(config);
      //得到二个静态数据
       buyBook =config.getInitParameter("buyBook");
       buyBookA =config.getInitParameter("buyBookA");
       selectOrder =config.getInitParameter("selectOrder");
    }
  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    //当浏览器访问Servlet的组成浏览器能看到的页面
    response.setContentType("text/html");
    response.setCharacterEncoding("utf-8");
    PrintWriter pw = response.getWriter();
    pw.append("<h1 align ='center'>图书界面</h1>");
    pw.append("<div align ='center'style=' background-color: #CCFFFF;'><h1 style='color:red'>");
    pw.append("<a href='ShowBuyBookServlet'>"+ buyBook+"</a>&nbsp;&nbsp;<br>");
    pw.append("<a href='ShowBuyBookServletA'>"+ buyBookA+"</a>&nbsp;&nbsp;<br>");
    pw.append("<a>"+selectOrder+"</a>&nbsp;&nbsp;<br>");
    pw.append("</h1></div>");
    System.out.println(buyBook+selectOrder);
  }
  /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    doGet(request, response);
  }
}

package com.Servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
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 com.entity.Book;
import com.util.BooksDBUtil;
/**
 * Servlet implementation class ShowBuyBookServlet
 */
@WebServlet("/ShowBuyBookServlet")
public class ShowBuyBookServlet extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ShowBuyBookServlet() {
        super();
        // TODO Auto-generated constructor stub
    }
  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    //从其他类中获取出要显示在浏览器上的所有图书信息
    List<Book> oBooks=BooksDBUtil.getBooks();
    response.setContentType("text/html");
    response.setCharacterEncoding("UTF-8");
    PrintWriter pw=response.getWriter();
    pw.append("<h1 align ='center' style='color:red'>手机浏览界面</h1>");
    pw.append("<div align='center'>");
    pw.append("<table border='3' style='width:800px;text-align:center;'>");
    pw.append("<tr>");
    pw.append("<td>书名</td>");
    pw.append("<td>作者 </td>");
    pw.append("<td>单价</td>");
    pw.append("<td>出版社</td>");
    pw.append("<td>操作</td>");
    pw.append("</tr>");
    //根据循环遍历list集合，从list集合中获得每一本图书信息
    for (int i = 0; i < oBooks.size(); i++) {
      pw.append("<tr>");
      pw.append("<td style='  background-color: lavender'>"+oBooks.get(i).getBookName()+"</td>");
      pw.append("<td style='  background-color:  lightblue'>"+oBooks.get(i).getAutor()+"</td>");
      pw.append("<td style='  background-color: pink'>"+oBooks.get(i).getPrice()+"</td>");
      pw.append("<td style='  background-color:  lightblue'>"+oBooks.get(i).getAddress()+"</td>");
      pw.append("<td style='  background-color: yellow'><a href='GetBuyBookInfoServlet?index="+i+"'>"
          + "<input type='button' value='购买' style='background: lightblue;width:100px'></a></td>");
      pw.append("</tr>");
    }
    pw.append("</table>");
    pw.append("</div>");
  }
  /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    doGet(request, response);
  }
}

package com.Servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
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 com.entity.Book;
import com.util.BooksDBUtil;
import com.util.BooksDBUtilA;
/**
 * Servlet implementation class ShowBuyBookServlet
 */
@WebServlet("/ShowBuyBookServletA")
public class ShowBuyBookServletA extends HttpServlet {
  private static final long serialVersionUID = 1L;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ShowBuyBookServletA() {
        super();
        // TODO Auto-generated constructor stub
    }
  /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    //从其他类中获取出要显示在浏览器上的所有图书信息
    List<Book> oBooks=BooksDBUtilA.getBooks();
    response.setContentType("text/html");
    response.setCharacterEncoding("UTF-8");
    PrintWriter pw=response.getWriter();
    pw.append("<h1 align ='center' style='color:red'>手机浏览界面</h1>");
    pw.append("<div align='center'>");
    pw.append("<table border='3' style='width:800px;text-align:center;'>");
    pw.append("<tr>");
    pw.append("<td>书名</td>");
    pw.append("<td>作者 </td>");
    pw.append("<td>单价</td>");
    pw.append("<td>出版社</td>");
    pw.append("<td>操作</td>");
    pw.append("</tr>");
    //根据循环遍历list集合，从list集合中获得每一本图书信息
    for (int i = 0; i < oBooks.size(); i++) {
      pw.append("<tr>");
      pw.append("<td style='  background-color: lavender'>"+oBooks.get(i).getBookName()+"</td>");
      pw.append("<td style='  background-color:  lightblue'>"+oBooks.get(i).getAutor()+"</td>");
      pw.append("<td style='  background-color: pink'>"+oBooks.get(i).getPrice()+"</td>");
      pw.append("<td style='  background-color:  lightblue'>"+oBooks.get(i).getAddress()+"</td>");
      pw.append("<td style='  background-color: yellow'><a href='GetBuyBookInfoServlet?index="+i+"'>"
          + "<input type='button' value='购买' style='background: lightblue;width:100px'></a></td>");
      pw.append("</tr>");
    }
    pw.append("</table>");
    pw.append("</div>");
  }
  /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    // TODO Auto-generated method stub
    doGet(request, response);
  }
}

package com.util;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.entity.Book;
/**
 * 放图书的内容工具类
 * @author MZFAITHDREAM
 *2021/10/19
 */
public class BooksDBUtil {
  public static List<Book> getBooks(){
    Book book1 =new Book("java程序设计","自由", "39元","人民日报","");
    Book book2 =new Book("java网站设计","马玉", "89元","清华","");
    Book book3 =new Book("javascript程序设计","不变", "239元","人民日报","");
    Book book4 =new Book("jquery程序设计","胡毅", "189元","江西出版社","");
    Book book5=new Book("mysql程序设计","ok", "179元","北大","");
    Book book6 =new Book("Sping框架设计","胡三", "129元","人民日报","");
    Book book7 =new Book("java高级编程","呼万岁", "159元","河南出版社","");
    Book book8=new Book("ps设计","ok", "239元","西安出版社","");
    Book book9 =new Book("Sping框架设计","胡三", "129元","人民日报","");
    Book book10=new Book("Java程序设计", "马云", "78.0元", "人民邮电出版社", "");
    Book book11=new Book("Jsp网络编程", "马化腾", "118.0元", "清华大学出版社", "");
    Book book12=new Book("Python爬虫技术", "李彦宏", "65.0元", "电子工业出版社", "");
    Book book13=new Book("网页程序设计", "任正非", "38.0元", "江西出版社", "");
    Book book14=new Book("MySQL程序教程", "雷军", "59.0元", "吉林出版社", "");
    Book book15=new Book("Spring框架技术", "马小云", "46.0元", "人民邮电出版社", "");
    List <Book> oBooks=new ArrayList<Book>();
    oBooks.add(book1);
    oBooks.add(book2);
    oBooks.add(book3);
    oBooks.add(book4);
    oBooks.add(book5);
    oBooks.add(book6);
    oBooks.add(book7);
    oBooks.add(book8);
    oBooks.add(book9);
    oBooks.add(book10);
    oBooks.add(book11);
    oBooks.add(book12);
    oBooks.add(book13);
    oBooks.add(book14);
    oBooks.add(book15);
    return oBooks;
  }
  public static String getNowTime() {
    Date date=new Date();
    //2021年10月19日
    SimpleDateFormat sdf=new SimpleDateFormat ("YYYY年MM月DD日HH:mm:ss");
    //要求当前时间进行格式化
    String time=sdf.format(date);
    return time;
  }
}

package com.util;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.entity.Book;
/**
 * 放图书的内容工具类
 * @author MZFAITHDREAM
 *2021/10/19
 */
public class BooksDBUtilA {
  public static List<Book> getBooks(){
    Book book1 =new Book("java基础","自由", "39元","人民日报","");
    Book book2 =new Book("html网站设计","马玉", "489元","清华","");
    Book book3 =new Book("javascript程序设计","不变", "239元","人民日报","");
    Book book4 =new Book("jquery程序设计","胡毅", "189元","江西出版社","");
    Book book5=new Book("mysql程序设计","ok", "179元","北大","");
    Book book6 =new Book("Sping框架设计","胡三", "129元","人民日报","");
    Book book7 =new Book("java高级编程","呼万岁", "159元","河南出版社","");
    Book book8=new Book("ps设计","ok", "239元","西安出版社","");
    Book book9 =new Book("Sping框架设计","胡三", "129元","人民日报","");
    Book book10=new Book("Java程序设计", "马云", "78.0元", "人民邮电出版社", "");
    Book book11=new Book("Jsp网络编程", "马化腾", "118.0元", "清华大学出版社", "");
    Book book12=new Book("Python爬虫技术", "李彦宏", "65.0元", "电子工业出版社", "");
    Book book13=new Book("网页程序设计", "任正非", "38.0元", "江西出版社", "");
    Book book14=new Book("MySQL程序教程", "雷军", "59.0元", "吉林出版社", "");
    Book book15=new Book("Spring框架技术", "马小云", "46.0元", "人民邮电出版社", "");
    List <Book> oBooks=new ArrayList<Book>();
    oBooks.add(book1);
    oBooks.add(book2);
    oBooks.add(book3);
    oBooks.add(book4);
    oBooks.add(book5);
    oBooks.add(book6);
    oBooks.add(book7);
    oBooks.add(book8);
    oBooks.add(book9);
    oBooks.add(book10);
    oBooks.add(book11);
    oBooks.add(book12);
    oBooks.add(book13);
    oBooks.add(book14);
    oBooks.add(book15);
    return oBooks;
  }
  public static String getNowTime() {
    Date date=new Date();
    //2021年10月19日
    SimpleDateFormat sdf=new SimpleDateFormat ("YYYY年MM月DD日HH:mm:ss");
    //要求当前时间进行格式化
    String time=sdf.format(date);
    return time;
  }
}