大項目之網上書城（四）——主頁（下中）
目錄
我要更新啊！日更啊！
主要改動
今天完成了昨天計划的任務的准備工作的一部分，以及更早的一些思路，以及為以后籌划的一些思路。
具體點說，今天完成了按照數據庫中re_du屬性對新書進行排序后展示的功能。也就是說可以在數據庫改變后頁面做出相應變化。然后計划中為完成的是之前沒接觸過的往數據庫中添加圖片，並把這個圖片顯示到網頁上的操作。然后熱門推書漏掉了。
哦，還有對注冊進行了小小的測試。
1.主頁持續施工中
代碼
幾乎沒變，添加了對熱度的顯示。
<!-- 新書上架中的每一項都加了一個id為re1-9的值來表示熱度 -->
<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="圖書" 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">圖書</font>
<font style="font-size:8px"id="re1"></font>
</div>
</td>
<!-- 新書榜中的列表，每一項加了一個id為r1-9的值來表示熱度，同時將本來在li上的id:x1-9移到了li中的一個新的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>
效果圖
表為
時，顯示效果為：
表為
時，顯示效果為：
2.index.js
超大改動，for循環post的方法竟然失敗了，於是我單着一個一個寫了。。。建議不要學。
代碼
$(function(){
//動態顯示初始輪播圖
$("#lun").css("background-image","Url('img/tu1.jpg')");
//通過點擊切換輪播圖
$("#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')");
});
//動態顯示初始熱門書
$.post("../ReMen?page=1",function(data){
var code=data;
code=code.split("#");
$("#a1").html(code[0]);
$("#a2").html(code[1]);
});
//動態顯示初始新書和初始新書榜
$.post("../XinShuMing?shu=1",function(data){
data = data.split("@")
$("#shu1").html(1+"."+data[0]);
$("#x1").html(1+"."+data[0]);
$("#re1").html("熱度:"+data[1]);
$("#r1").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=2",function(data){
data = data.split("@")
$("#shu2").html(2+"."+data[0]);
$("#x2").html(2+"."+data[0]);
$("#re2").html("熱度:"+data[1]);
$("#r2").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=3",function(data){
data = data.split("@")
$("#shu3").html(3+"."+data[0]);
$("#x3").html(3+"."+data[0]);
$("#re3").html("熱度:"+data[1]);
$("#r3").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=4",function(data){
data = data.split("@")
$("#shu4").html(4+"."+data[0]);
$("#x4").html(4+"."+data[0]);
$("#re4").html("熱度:"+data[1]);
$("#r4").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=5",function(data){
data = data.split("@")
$("#shu5").html(5+"."+data[0]);
$("#x5").html(5+"."+data[0]);
$("#re5").html("熱度:"+data[1]);
$("#r5").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=6",function(data){
data = data.split("@")
$("#shu6").html(6+"."+data[0]);
$("#x6").html(6+"."+data[0]);
$("#re6").html("熱度:"+data[1]);
$("#r6").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=7",function(data){
data = data.split("@")
$("#shu7").html(7+"."+data[0]);
$("#x7").html(7+"."+data[0]);
$("#re7").html("熱度:"+data[1]);
$("#r7").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=8",function(data){
data = data.split("@")
$("#shu8").html(8+"."+data[0]);
$("#x8").html(8+"."+data[0]);
$("#re8").html("熱度:"+data[1]);
$("#r8").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=9",function(data){
data = data.split("@")
$("#shu9").html(9+"."+data[0]);
$("#x9").html(9+"."+data[0]);
$("#re9").html("熱度:"+data[1]);
$("#r9").html("熱度:"+data[1]);
});
//通過點擊b5,b6,b7,b8,將前1到36展示在頁面上。
$("#b5").click(function(){
$.post("../XinShuMing?shu=1",function(data){
data = data.split("@")
$("#x1").html(1+"."+data[0]);
$("#r1").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=2",function(data){
data = data.split("@")
$("#x2").html(2+"."+data[0]);
$("#r2").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=3",function(data){
data = data.split("@")
$("#x3").html(3+"."+data[0]);
$("#r3").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=4",function(data){
data = data.split("@")
$("#x4").html(4+"."+data[0]);
$("#r4").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=5",function(data){
data = data.split("@")
$("#x5").html(5+"."+data[0]);
$("#r5").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=6",function(data){
data = data.split("@")
$("#x6").html(6+"."+data[0]);
$("#r6").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=7",function(data){
data = data.split("@")
$("#x7").html(7+"."+data[0]);
$("#r7").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=8",function(data){
data = data.split("@")
$("#x8").html(8+"."+data[0]);
$("#r8").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=9",function(data){
data = data.split("@")
$("#x9").html(9+"."+data[0]);
$("#r9").html("熱度:"+data[1]);
});
});
$("#b6").click(function(){
$.post("../XinShuMing?shu=10",function(data){
$("#x1").html(10+"."+data);
$("#r1").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=11",function(data){
$("#x2").html(11+"."+data);
$("#r2").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=12",function(data){
$("#x3").html(12+"."+data);
$("#r3").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=13",function(data){
$("#x4").html(13+"."+data);
$("#r4").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=14",function(data){
$("#x5").html(14+"."+data);
$("#r5").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=15",function(data){
$("#x6").html(15+"."+data);
$("#r6").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=16",function(data){
$("#x7").html(16+"."+data);
$("#r7").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=17",function(data){
$("#x8").html(17+"."+data);
$("#r8").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=18",function(data){
$("#x9").html(18+"."+data);
$("#r9").html("熱度:"+data[1]);
});
});
$("#b7").click(function(){
$.post("../XinShuMing?shu=19",function(data){
$("#x1").html(19+"."+data);
$("#r1").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=20",function(data){
$("#x2").html(20+"."+data);
$("#r2").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=21",function(data){
$("#x3").html(21+"."+data);
$("#r3").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=22",function(data){
$("#x4").html(22+"."+data);
$("#r4").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=23",function(data){
$("#x5").html(23+"."+data);
$("#r5").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=24",function(data){
$("#x6").html(24+"."+data);
$("#r6").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=25",function(data){
$("#x7").html(25+"."+data);
$("#r7").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=26",function(data){
$("#x8").html(26+"."+data);
$("#r8").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=27",function(data){
$("#x9").html(27+"."+data);
$("#r9").html("熱度:"+data[1]);
});
});
$("#b8").click(function(){
$.post("../XinShuMing?shu=28",function(data){
$("#x1").html(28+"."+data);
$("#r1").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=29",function(data){
$("#x2").html(29+"."+data);
$("#r2").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=30",function(data){
$("#x3").html(30+"."+data);
$("#r3").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=31",function(data){
$("#x4").html(31+"."+data);
$("#r4").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=32",function(data){
$("#x5").html(32+"."+data);
$("#r5").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=33",function(data){
$("#x6").html(33+"."+data);
$("#r6").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=34",function(data){
$("#x7").html(34+"."+data);
$("#r7").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=35",function(data){
$("#x8").html(35+"."+data);
$("#r8").html("熱度:"+data[1]);
});
$.post("../XinShuMing?shu=36",function(data){
$("#x9").html(36+"."+data);
$("#r9").html("熱度:"+data[1]);
});
});
//通過點擊b1,b2,b3,b4，配合以特殊的查詢方式，將前8的熱門書展示在頁面上。
$("#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]);
});
});
});
熱度
總得有人好奇下這個熱度是怎么來的吧，他是根據book表中的點擊量和購買量來計算的哦。恩，先放觸發器，表結構一會兒放。emmmm，查詢一不小心刪了，這是從sql文件里扒出來的~
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
表結構
book表
user表
4.XinShuMingServlet
代碼
這個就是js請求的servlet啦，返回對應排名的書的網址存儲好的a標簽，還有他的熱度。
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 {
//通過js動態從數據庫中取書名，以及書的路徑，寫成一個a標簽。
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 = "暫無";
response.getWriter().print(html);
}else if(reDu>10000) {
re_du = reDu/10000+"萬";
}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
代碼
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();
//如果注冊失敗,在register.jsp中用${errorMsg}來顯示下提示信息。
String msg = userService.register(user);
if(msg.equals("root")) {
request.setAttribute("errorMsg", "用戶名不能為root");
request.getRequestDispatcher("client/register.jsp").forward(request, response);
}else if(msg.equals("user")) {
request.setAttribute("errorMsg", "用戶名已存在");
request.getRequestDispatcher("client/register.jsp").forward(request, response);
}else {
//如果成功，進入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);
}
}
效果圖
6.UserServiceImpl
代碼
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，這個來在這里放一下代碼吧，按理說這種操作不應該放在dao里，當時腦子沒想清楚，就這樣吧~
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.總結
今天發得有點晚了哈，主要是沉迷進去打了，時間就過的很慢，而且不寫出來點什么也不好意思發博客。