# 大项目之网上书城(四)——主页(下中)

大项目之网上书城(四)——主页(下中)

我要更新啊!日更啊!

主要改动

今天完成了昨天计划的任务的准备工作的一部分,以及更早的一些思路,以及为以后筹划的一些思路。

具体点说,今天完成了按照数据库中re_du属性对新书进行排序后展示的功能。也就是说可以在数据库改变后页面做出相应变化。然后计划中为完成的是之前没接触过的往数据库中添加图片,并把这个图片显示到网页上的操作。然后热门推书漏掉了。

哦,还有对注册进行了小小的测试。

1.主页持续施工中

代码

几乎没变,添加了对热度的显示。

<!-- 新书上架中的每一项都加了一个id为re1-9的值来表示热度 -->
<div style="width:50%;height:63%;float:left;background-color:#a8f;margin-left:2%;margin-top:2%;"id="xinShu">
<table border="1"style="width:100%;height:100%">
    <tr>
        <td>
            <div style="width:94%;height:80%;background-color:white;margin-left:3%;float:left">
                <img alt="图书" src="${pageContext.request.contextPath}/XinShuImg?shu=1" style="width:100%;height:100%;"/>
            </div>
            <div style="width:94%;float:left;margin-left:3%;height:15%;">
                <font style="font-size:16px;margin-left:3%;"id="shu1">图书</font>
                <font style="font-size:8px"id="re1"></font>
            </div>
        </td>

<!-- 新书榜中的列表,每一项加了一个id为r1-9的值来表示热度,同时将本来在li上的id:x1-9移到了li中的一个新的font中。 -->

        <ul>
            <li style="text-align:left;color:black"><font id="x1"></font><font id="r1" style="font-size:8px"></font></li>
            <li style="text-align:left;color:black"><font id="x2"></font><font id="r2" style="font-size:8px"></font></li>
            <li style="text-align:left;color:black"><font id="x3"></font><font id="r3" style="font-size:8px"></font></li>
            <li style="text-align:left;color:black"><font id="x4"></font><font id="r4" style="font-size:8px"></font></li>
            <li style="text-align:left;color:black"><font id="x5"></font><font id="r5" style="font-size:8px"></font></li>
            <li style="text-align:left;color:black"><font id="x6"></font><font id="r6" style="font-size:8px"></font></li>
            <li style="text-align:left;color:black"><font id="x7"></font><font id="r7" style="font-size:8px"></font></li>
            <li style="text-align:left;color:black"><font id="x8"></font><font id="r8" style="font-size:8px"></font></li>
            <li style="text-align:left;color:black"><font id="x9"></font><font id="r9" style="font-size:8px"></font></li>
        </ul>
        

效果图

表为

时,显示效果为:

表为

时,显示效果为:

2.index.js

超大改动,for循环post的方法竟然失败了,于是我单着一个一个写了。。。建议不要学。

代码

$(function(){
    //动态显示初始轮播图
    $("#lun").css("background-image","Url('img/tu1.jpg')");
    //通过点击切换轮播图
    $("#l1").click(function(){
        $("#lun").css("background-image","Url('img/tu1.jpg')");     
    });
    $("#l2").click(function(){
        $("#lun").css("background-image","Url('img/tu2.jpg')");     
    });
    $("#l3").click(function(){
        $("#lun").css("background-image","Url('img/tu3.jpg')");     
    });
    $("#l4").click(function(){
        $("#lun").css("background-image","Url('img/tu4.jpg')");     
    });
    //动态显示初始热门书
    $.post("../ReMen?page=1",function(data){
        var code=data;
        code=code.split("#");
        $("#a1").html(code[0]);
        $("#a2").html(code[1]);
    });
    //动态显示初始新书和初始新书榜
    $.post("../XinShuMing?shu=1",function(data){
        data = data.split("@")
        $("#shu1").html(1+"."+data[0]);
        $("#x1").html(1+"."+data[0]);
        $("#re1").html("热度:"+data[1]);
        $("#r1").html("热度:"+data[1]);
    });
    $.post("../XinShuMing?shu=2",function(data){
        data = data.split("@")
        $("#shu2").html(2+"."+data[0]);
        $("#x2").html(2+"."+data[0]);
        $("#re2").html("热度:"+data[1]);
        $("#r2").html("热度:"+data[1]);
    });
    $.post("../XinShuMing?shu=3",function(data){
        data = data.split("@")
        $("#shu3").html(3+"."+data[0]);
        $("#x3").html(3+"."+data[0]);
        $("#re3").html("热度:"+data[1]);
        $("#r3").html("热度:"+data[1]);
    });
    $.post("../XinShuMing?shu=4",function(data){
        data = data.split("@")
        $("#shu4").html(4+"."+data[0]);
        $("#x4").html(4+"."+data[0]);
        $("#re4").html("热度:"+data[1]);
        $("#r4").html("热度:"+data[1]);
    });
    $.post("../XinShuMing?shu=5",function(data){
        data = data.split("@")
        $("#shu5").html(5+"."+data[0]);
        $("#x5").html(5+"."+data[0]);
        $("#re5").html("热度:"+data[1]);
        $("#r5").html("热度:"+data[1]);
    });
    $.post("../XinShuMing?shu=6",function(data){
        data = data.split("@")
        $("#shu6").html(6+"."+data[0]);
        $("#x6").html(6+"."+data[0]);
        $("#re6").html("热度:"+data[1]);
        $("#r6").html("热度:"+data[1]);
    });
    $.post("../XinShuMing?shu=7",function(data){
        data = data.split("@")
        $("#shu7").html(7+"."+data[0]);
        $("#x7").html(7+"."+data[0]);
        $("#re7").html("热度:"+data[1]);
        $("#r7").html("热度:"+data[1]);
    });
    $.post("../XinShuMing?shu=8",function(data){
        data = data.split("@")
        $("#shu8").html(8+"."+data[0]);
        $("#x8").html(8+"."+data[0]);
        $("#re8").html("热度:"+data[1]);
        $("#r8").html("热度:"+data[1]);
    });
    $.post("../XinShuMing?shu=9",function(data){
        data = data.split("@")
        $("#shu9").html(9+"."+data[0]);
        $("#x9").html(9+"."+data[0]);
        $("#re9").html("热度:"+data[1]);
        $("#r9").html("热度:"+data[1]);
    });
    //通过点击b5,b6,b7,b8,将前1到36展示在页面上。
    $("#b5").click(function(){
        $.post("../XinShuMing?shu=1",function(data){
            data = data.split("@")
            $("#x1").html(1+"."+data[0]);
            $("#r1").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=2",function(data){
            data = data.split("@")
            $("#x2").html(2+"."+data[0]);
            $("#r2").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=3",function(data){
            data = data.split("@")
            $("#x3").html(3+"."+data[0]);
            $("#r3").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=4",function(data){
            data = data.split("@")
            $("#x4").html(4+"."+data[0]);
            $("#r4").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=5",function(data){
            data = data.split("@")
            $("#x5").html(5+"."+data[0]);
            $("#r5").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=6",function(data){
            data = data.split("@")
            $("#x6").html(6+"."+data[0]);
            $("#r6").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=7",function(data){
            data = data.split("@")
            $("#x7").html(7+"."+data[0]);
            $("#r7").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=8",function(data){
            data = data.split("@")
            $("#x8").html(8+"."+data[0]);
            $("#r8").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=9",function(data){
            data = data.split("@")
            $("#x9").html(9+"."+data[0]);
            $("#r9").html("热度:"+data[1]);
        });
        
    });
    $("#b6").click(function(){
        $.post("../XinShuMing?shu=10",function(data){
            $("#x1").html(10+"."+data);
            $("#r1").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=11",function(data){
            $("#x2").html(11+"."+data);
            $("#r2").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=12",function(data){
            $("#x3").html(12+"."+data);
            $("#r3").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=13",function(data){
            $("#x4").html(13+"."+data);
            $("#r4").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=14",function(data){
            $("#x5").html(14+"."+data);
            $("#r5").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=15",function(data){
            $("#x6").html(15+"."+data);
            $("#r6").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=16",function(data){
            $("#x7").html(16+"."+data);
            $("#r7").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=17",function(data){
            $("#x8").html(17+"."+data);
            $("#r8").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=18",function(data){
            $("#x9").html(18+"."+data);
            $("#r9").html("热度:"+data[1]);
        });
        
    });
    $("#b7").click(function(){
        $.post("../XinShuMing?shu=19",function(data){
            $("#x1").html(19+"."+data);
            $("#r1").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=20",function(data){
            $("#x2").html(20+"."+data);
            $("#r2").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=21",function(data){
            $("#x3").html(21+"."+data);
            $("#r3").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=22",function(data){
            $("#x4").html(22+"."+data);
            $("#r4").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=23",function(data){
            $("#x5").html(23+"."+data);
            $("#r5").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=24",function(data){
            $("#x6").html(24+"."+data);
            $("#r6").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=25",function(data){
            $("#x7").html(25+"."+data);
            $("#r7").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=26",function(data){
            $("#x8").html(26+"."+data);
            $("#r8").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=27",function(data){
            $("#x9").html(27+"."+data);
            $("#r9").html("热度:"+data[1]);
        });
        
    });
    $("#b8").click(function(){
        $.post("../XinShuMing?shu=28",function(data){
            $("#x1").html(28+"."+data);
            $("#r1").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=29",function(data){
            $("#x2").html(29+"."+data);
            $("#r2").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=30",function(data){
            $("#x3").html(30+"."+data);
            $("#r3").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=31",function(data){
            $("#x4").html(31+"."+data);
            $("#r4").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=32",function(data){
            $("#x5").html(32+"."+data);
            $("#r5").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=33",function(data){
            $("#x6").html(33+"."+data);
            $("#r6").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=34",function(data){
            $("#x7").html(34+"."+data);
            $("#r7").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=35",function(data){
            $("#x8").html(35+"."+data);
            $("#r8").html("热度:"+data[1]);
        });
        $.post("../XinShuMing?shu=36",function(data){
            $("#x9").html(36+"."+data);
            $("#r9").html("热度:"+data[1]);
        });
        
    });
    //通过点击b1,b2,b3,b4,配合以特殊的查询方式,将前8的热门书展示在页面上。
    $("#b1").click(function(){
        $.post("../ReMen?page=1",function(data){
            var code=data;
            code=code.split("#");
            $("#a1").html(code[0]);
            $("#a2").html(code[1]);
        });
    });
    $("#b2").click(function(){
        $.post("../ReMen?page=2",function(data){
            var code=data;
            code=code.split("#");
            $("#a1").html(code[0]);
            $("#a2").html(code[1]);
        });
    });
    $("#b3").click(function(){
        $.post("../ReMen?page=3",function(data){
            var code=data;
            code=code.split("#");
            $("#a1").html(code[0]);
            $("#a2").html(code[1]);
        });
    });
    $("#b4").click(function(){
        $.post("../ReMen?page=4",function(data){
            var code=data;
            code=code.split("#");
            $("#a1").html(code[0]);
            $("#a2").html(code[1]);
        });     
    });
});

热度

总得有人好奇下这个热度是怎么来的吧,他是根据book表中的点击量和购买量来计算的哦。恩,先放触发器,表结构一会儿放。emmmm,查询一不小心删了,这是从sql文件里扒出来的~

DROP TRIGGER IF EXISTS `book_insert`;
DELIMITER ;;
CREATE TRIGGER `book_insert` BEFORE INSERT ON `book` FOR EACH ROW begin
    set NEW.re_du = NEW.click_num + NEW.buy_num * 100;
end
;;
DELIMITER ;
DROP TRIGGER IF EXISTS `book_update`;
DELIMITER ;;
CREATE TRIGGER `book_update` BEFORE UPDATE ON `book` FOR EACH ROW begin
    set NEW.re_du = NEW.click_num + NEW.buy_num * 100;
end
;;
DELIMITER ;

3.Book,User表

表结构

book表

user表

4.XinShuMingServlet

代码

这个就是js请求的servlet啦,返回对应排名的书的网址存储好的a标签,还有他的热度。

package cn.edu.bdu.mc.servlets;

import java.io.IOException;
import java.sql.SQLException;

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 cn.edu.bdu.mc.beans.Book;
import cn.edu.bdu.mc.services.BookService;
import cn.edu.bdu.mc.services.impls.BookServiceImpl;

/**
 * Servlet implementation class XinShuServlet
 */
@WebServlet("/XinShuMing")
public class XinShuMingServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public XinShuMingServlet() {
        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
        try {
            //通过js动态从数据库中取书名,以及书的路径,写成一个a标签。
            int shu = Integer.parseInt(request.getParameter("shu"));
            Book book = new Book();
            BookService bookService = new BookServiceImpl();
            book = bookService.findNewBookByPaiMing(shu);
            int reDu = book.getRe_du();
            String re_du = "";
            if(re_du==null) {
                String html = "暂无";
                response.getWriter().print(html);
            }else if(reDu>10000) {
                re_du = reDu/10000+"万";
            }else if(reDu>1000) {
                re_du = reDu/1000+"千";
            }else if(reDu>100) {
                re_du = reDu/100+"百";
            }else {
                re_du = reDu+"";
            }
            String html = "<a href='${pageContext.request.contextPath}/client/"+book.getClazz()+"/shu?er_id="+book.getSecond_id()+"' style='font-size:16px'>"+book.getBook_name()+"</a>@"+re_du;
            response.getWriter().print(html);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * @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);
    }

}

5.RegisterServlet

代码

package cn.edu.bdu.mc.servlets;

import java.io.IOException;
import java.sql.SQLException;

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 cn.edu.bdu.mc.beans.User;
import cn.edu.bdu.mc.services.UserService;
import cn.edu.bdu.mc.services.impls.UserServiceImpl;

/**
 * Servlet implementation class RegisterServlet
 */
@WebServlet("/Register")
public class RegisterServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public RegisterServlet() {
        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
        try {
            String username = request.getParameter("username");
            String password = request.getParameter("password");
            String email = request.getParameter("email");
            String gender = request.getParameter("gender");
            String phone = request.getParameter("phone");
            String describtion = request.getParameter("describtion");
            User user = new User();
            user.setUsername(username);
            user.setPassword(password);
            user.setEmail(email);
            user.setGender(gender);
            if(phone!=null) {               
                user.setPhone(Integer.parseInt(phone));
            }
            user.setDescribtion(describtion);
            UserService userService = new UserServiceImpl();
            //如果注册失败,在register.jsp中用${errorMsg}来显示下提示信息。
            String msg = userService.register(user);
            if(msg.equals("root")) {
                request.setAttribute("errorMsg", "用户名不能为root");
                request.getRequestDispatcher("client/register.jsp").forward(request, response);
            }else if(msg.equals("user")) {
                request.setAttribute("errorMsg", "用户名已存在");
                request.getRequestDispatcher("client/register.jsp").forward(request, response);
            }else {
                //如果成功,进入login界面
                response.sendRedirect("client/login.jsp");
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /**
     * @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);
    }

}

效果图

6.UserServiceImpl

代码

package cn.edu.bdu.mc.services.impls;

import java.sql.SQLException;

import cn.edu.bdu.mc.beans.User;
import cn.edu.bdu.mc.daos.UserDao;
import cn.edu.bdu.mc.daos.impls.UserDaoImpl;
import cn.edu.bdu.mc.services.UserService;

public class UserServiceImpl implements UserService {

    private static UserDao dao = new UserDaoImpl();
    @Override
    public String register(User user) throws SQLException {
        // TODO Auto-generated method stub
        if("root".equals(user.getUsername())) {
            return "root";
        }
        if(dao.isExistedUsername(user.getUsername())) {
            return "user";
        }
        dao.addUser(user);
        return "success";
    }

}

7.BookServiceImpl

package cn.edu.bdu.mc.services.impls;

import java.sql.SQLException;

import javax.sql.DataSource;

import cn.edu.bdu.mc.beans.Book;
import cn.edu.bdu.mc.daos.BookDao;
import cn.edu.bdu.mc.daos.impls.BookDaoImpl;
import cn.edu.bdu.mc.services.BookService;
import cn.edu.bdu.mc.utils.JDBCUtil;

public class BookServiceImpl implements BookService {

    private static DataSource dataSource = JDBCUtil.getDataSource();
    private static BookDao dao = new BookDaoImpl(); 

    @Override
    public Book findNewBookByPaiMing(int shu) throws SQLException {
        // TODO Auto-generated method stub
        return dao.findNewBookByPaiMing(shu);
    }
    /*
    其他都是基本操作,这个来在这里放一下代码吧,按理说这种操作不应该放在dao里,当时脑子没想清楚,就这样吧~
    private static DataSource dataSource = JDBCUtil.getDataSource();
    private static QueryRunner queryRunner = new QueryRunner(dataSource);       

    @Override
    public Book findNewBookByPaiMing(int shu) throws SQLException {
        // TODO Auto-generated method stub
        String sql = "select * from (select * from book where is_new = 1 order by re_du desc)as book1 limit "+(shu-1)+",1";
        return queryRunner.query(sql, new BeanHandler<Book>(Book.class));
    }
    
    */

    @Override
    public void click(int book_id) throws SQLException {
        // TODO Auto-generated method stub
        Book book = dao.findBookById(book_id);
        book.setClick_num(book.getClick_num()+1);
        dao.update(book);
    }
    
    @Override
    public void buy(int book_id) throws SQLException {
        // TODO Auto-generated method stub
        Book book = dao.findBookById(book_id);
        book.setBuy_num(book.getBuy_num()+1);
        dao.update(book);
    }
}

8.总结

今天发得有点晚了哈,主要是沉迷进去打了,时间就过的很慢,而且不写出来点什么也不好意思发博客。

posted @ 2019-06-17 23:37 return_false 阅读(...) 评论(...) 编辑 收藏