大项目之网上书城（五）——主页（End）

时间  2019-12-06
标签 项目 网上 书城 主页 end 繁體版
原文   原文链接

目录javascript

大项目之网上书城（五）——主页（End）

不说了！日更啊！css

主要改动

今天终于把主页完成啦！给书加了图片，虽然图片严重不符，不够这都是小问题，如今仍是测试阶段，到时候整理下数据库就好了。html

同时终于加了登陆页面，并把验证码移到了登陆界面，注册页面就不须要了。java

最后，加了个用户页面，不过目前只有退出帐号功能233333jquery

1.主页（终于完成啦）

完整代码

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<style>
li{
    float:left;
    width:100%;
    height:10%;
    font-size:16px;
    color:#8deeee;
}
</style>
<script type="text/javascript" src="${pageContext.request.contextPath}/jquery-3.3.1/jquery-3.3.1.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/client/js/index.js"></script>
<title>主页</title>
</head>
<body style="background-color:#bbb">
<!-- 调用头部页面 -->
<div style="width:100%;height:100px;float:left">
<jsp:include page="/client/head.jsp"></jsp:include>
</div>
<!-- 通用内容体大小 -->
<div style="width:70%;height:886px;float:left;margin-left:15%;">
<!-- 二级导航 -->
<jsp:include page="/client/head2.jsp"></jsp:include>    
<!-- 图书分类and轮播图and文案and热门推荐and新书上架and新书榜 -->
<div style="width:100%;height:800px;float:left;margin-top:2%;background-color:#bbb;">
<!-- 图书分类 -->
<div style="width:23%;height:100%;float:left;background-color:#a8f;">
    <div style="width:100%;height:6%;text-align:center;line-height:45px;background-color:#556B2F">
        <font color="#ddd" style="font-size:20px;">图书分类</font>
    </div>
    <div style="width:100%;height:94%;text-align:center;line-height:45px;background-color:#548B54">
        <ul style="width:100%;height:100%;text-align:left;">
            <li>
                <a href="${pageContext.request.contextPath }/client/pai/index.jsp">好书拍卖</a>
            </li>
            <li>
                <a href="${pageContext.request.contextPath }/client/net_literature/index.jsp">网络文学</a>
            </li>
            <li>
                <a href="${pageContext.request.contextPath }/client/clothing/index.jsp">服装</a>
            </li>
            <li>
                <a href="${pageContext.request.contextPath }/client/sport/index.jsp">运动户外</a>
            </li>
            <li>
                <a href="${pageContext.request.contextPath }/client/nursery/index.jsp">孕婴童</a>
            </li>
            <li>
                <a href="${pageContext.request.contextPath }/client/nursery/index.jsp">孕婴童</a>
            </li>
            <li>
                <a href="${pageContext.request.contextPath }/client/food/index.jsp">食品</a>
            </li>
            <li>
                <a href="#">暂无分类</a>
            </li>
            <li>
                <a href="#">暂无分类</a>
            </li>
            <li>
                <a href="#">暂无分类</a>
            </li>
        </ul>
    </div>  
</div>
<!-- 轮播图 -->
<div style="width:50%;height:35%;float:left;margin-left:2%;background-size:100% 100%;"id="lun">
    <!-- table按钮沉底大法！ -->
    <table style="width:100%;height:100%">
        <tr>
            <td style="vertical-align:bottom;">
                <button class="btn btn-warning" style="width:30px;height:30px;float:left;margin-left:60%;" id="l1">1</button>
                <button class="btn btn-warning" style="width:30px;height:30px;float:left;margin-left:2%;" id="l2">2</button>
                <button class="btn btn-warning" style="width:30px;height:30px;float:left;margin-left:2%;" id="l3">3</button>
                <button class="btn btn-warning" style="width:30px;height:30px;float:left;margin-left:2%;" id="l4">4</button>
            </td>
        </tr>
    </table>
</div>
<!-- 文案and热门推荐 -->
<div style="width:23%;height:35%;float:left;background-color:#bbb;margin-left:2%">
<!-- 文案 -->
<div style="width:100%;height:30%;float:left;background-color:#548B54;">
    <font style="font-size:20px;text-align:center;display:block;width:100%;color:#ee4000">618年中狂欢</font>
    <font style="display:block;color:#eead0e">十万童书，每满100减50</font>
    <font style="display:block;color:#eead0e">艺术绘画，每满100减50</font>
</div>
<!-- 热门推荐 -->
<div style="width:100%;height:64%;float:left;background-color:#a8f;margin-top:8%">
    <div style="width:100%;height:25%;text-align:center;line-height:45px;background-color:#556B2F">
        <font color="#ddd" style="font-size:20px;">热门推荐</font>
    </div>
    <div style="width:100%;height:75%;text-align:center;line-height:45px;background-color:#548B54;margin-top:-5%;">
        <ul>
            <li style="text-align:left;color:black"><font id="a1"></font><font id="remen1" style="font-size:8px"></font></li>
            <li style="text-align:left;color:black"><font id="a2"></font><font id="remen2" style="font-size:8px"></font></li>
        </ul>
        <div style="width:100%;height:20%;float:left;margin-top:5%">
            <button class="btn btn-info" style="float:left;margin-left:20%;font-size:8px;"id="b1">1</button>
            <button class="btn btn-info" style="float:left;margin-left:4%;font-size:8px;"id="b2">2</button>
            <button class="btn btn-info" style="float:left;margin-left:4%;font-size:8px;"id="b3">3</button>
            <button class="btn btn-info" style="float:left;margin-left:4%;font-size:8px;"id="b4">4</button>
        </div>
    </div>
</div>
</div>
<!-- 新书上架 -->
<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 style="width:33%">
            <div style="width:94%;height:80%;background-color:white;margin-left:3%;float:left">
                <img alt="图书" src="${pageContext.request.contextPath}/XinShuImg?shu=1" style="width:100%;"/>
            </div>
            <div style="width:94%;float:left;margin-left:3%;height:15%;">
                <font style="font-size:16px;margin-left:3%;"id="shu1">图书</font>
                <font style="font-size:8px"id="re1"></font>
            </div>
        </td>
        <td style="width:33%">
            <div style="width:94%;height:80%;background-color:white;margin-left:3%;float:left">
                <img alt="图书" src="${pageContext.request.contextPath}/XinShuImg?shu=2" style="width:100%;"/>
            </div>
            <div style="width:94%;float:left;margin-left:3%;height:15%;">
                <font style="font-size:16px;margin-left:3%;"id="shu2">图书</font>
                <font style="font-size:8px"id="re2"></font>
            </div>
        </td>
        <td style="width:33%">
            <div style="width:94%;height:80%;background-color:white;margin-left:3%;float:left">
                <img alt="图书" src="${pageContext.request.contextPath}/XinShuImg?shu=3" style="width:100%;"/>
            </div>
            <div style="width:94%;float:left;margin-left:3%;height:15%;">
                <font style="font-size:16px;margin-left:3%;"id="shu3">图书</font>
                <font style="font-size:8px"id="re3"></font>
            </div>
        </td>
    </tr>
    <tr>
        <td style="width:33%">
            <div style="width:94%;height:80%;background-color:white;float:left;margin-left:3%">
                <img alt="图书" src="${pageContext.request.contextPath}/XinShuImg?shu=4" style="width:100%;"/>
            </div>
            <div style="width:94%;float:left;margin-left:3%;height:15%;">
                <font style="font-size:16px;margin-left:3%;"id="shu4">图书</font>
                <font style="font-size:8px"id="re4"></font>
            </div>
        </td>
        <td style="width:33%">
            <div style="width:94%;height:80%;background-color:white;margin-left:3%;float:left">
                <img alt="图书" src="${pageContext.request.contextPath}/XinShuImg?shu=5" style="width:100%;"/>
            </div>
            <div style="width:94%;float:left;margin-left:3%;height:15%;">
                <font style="font-size:16px;margin-left:3%;"id="shu5">图书</font>
                <font style="font-size:8px"id="re5"></font>
            </div>
        </td>
        <td style="width:33%">
            <div style="width:94%;height:80%;background-color:white;margin-left:3%;float:left">
                <img alt="图书" src="${pageContext.request.contextPath}/XinShuImg?shu=6" style="width:100%;"/>
            </div>
            <div style="width:94%;float:left;margin-left:3%;height:15%;">
                <font style="font-size:16px;margin-left:3%;"id="shu6">图书</font>
                <font style="font-size:8px"id="re6"></font>
            </div>
        </td>
    </tr>
    <tr>
        <td style="width:33%">
            <div style="width:94%;height:80%;background-color:white;margin-left:3%;float:left">
                <img alt="图书" src="${pageContext.request.contextPath}/XinShuImg?shu=7" style="width:100%;"/>
            </div>
            <div style="width:94%;float:left;margin-left:3%;height:15%;">
                <font style="font-size:16px;margin-left:3%;"id="shu7">图书</font>
                <font style="font-size:8px"id="re7"></font>
            </div>
        </td>
        <td style="width:33%">
            <div style="width:94%;height:80%;background-color:white;margin-left:3%;float:left">
                <img alt="图书" src="${pageContext.request.contextPath}/XinShuImg?shu=8" style="width:100%;"/>
            </div>
            <div style="width:94%;float:left;margin-left:3%;height:15%;">
                <font style="font-size:16px;margin-left:3%;"id="shu8">图书</font>
                <font style="font-size:8px"id="re8"></font>
            </div>
            
        </td>
        <td style="width:33%">
            <div style="width:94%;height:80%;background-color:white;margin-left:3%;float:left">
                <img alt="图书" src="${pageContext.request.contextPath}/XinShuImg?shu=9" style="width:100%;"/>
            </div>
            <div style="width:94%;float:left;margin-left:3%;height:15%;">
                <font style="font-size:16px;margin-left:3%;"id="shu9">图书</font>
                <font style="font-size:8px"id="re9"></font>
            </div>
        </td>
    </tr>
</table>
</div>
<!-- 新书榜 -->
<div style="width:23%;height:63%;float:left;background-color:#a8f;margin-left:2%;margin-top:2%;">
    <div style="width:100%;height:10%;text-align:center;line-height:45px;background-color:#556B2F">
        <font color="#ddd" style="font-size:20px;">新书排行榜</font>
    </div>
    <div style="width:100%;height:90%;text-align:center;line-height:45px;background-color:#548B54;">
        <ul style="width:100%;height:90%;float:left;">
            <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>
            <div style="width:100%;height:10%;float:left;">
                <button class="btn btn-info" style="float:left;margin-left:20%;font-size:8px;"id="b5">1</button>
                <button class="btn btn-info" style="float:left;margin-left:4%;font-size:8px;"id="b6">2</button>
                <button class="btn btn-info" style="float:left;margin-left:4%;font-size:8px;"id="b7">3</button>
                <button class="btn btn-info" style="float:left;margin-left:4%;font-size:8px;"id="b8">4</button>
            </div>
    </div>
</div>
</div>
</div>
<!-- 调用底部页面 -->
<div style="width:100%;height:60px;float:left">
<jsp:include page="/client/foot.jsp"></jsp:include>
</div>
</body>
</html>

效果图

2.head.jsp的小改动

给个人帐号加了个判断，若是已经登陆了，就显示为你的用户名，可跳转到你的我的主页。不然显示“个人帐号”，可跳转到登陆界面。恩，悄悄给BookStore字样作了个到主页的跳转~sql

代码

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<title>Insert title here</title>
<!-- 这里的href请写本身的bootstrap的css的连接。若是没有下载，能够用这个 -->
<!-- https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css -->
<link rel="stylesheet" href="${pageContext.request.contextPath }/bootstrap-3.3.7-dist/css/bootstrap.min.css">
<style type="text/css">
@font-face{
  font-family: myFont;
  src: url("${pageContext.request.contextPath }/bootstrap-3.3.7-dist/fonts/Adventure-Normal.ttf");
}
a:link {text-decoration:none;color: black} /* 未访问的连接 */
a:visited {text-decoration:none;color: black} /* 已访问的连接 */
a:hover {text-decoration:none;color: #068} /* 鼠标移动到连接上 */
a:active {text-decoration:none;color: #068} /* 选定的连接，即鼠标按下去的时候不松开显示的状态 */
a{
    font-size:18px;
}
</style>
</head>
<body>
<div style="height:100px;width:100%;float:left">
    <!-- BookStore字样 -->
    <div style="line-height:120px;height:100px;width:45%;margin-left:15%;float:left">
        <a href="${pageContext.request.contextPath }/client/index.jsp"><font face="myFont" color = "black" style="font-size:60px">BookStore</font></a>
    </div>
    <!-- 导航栏 -->
    <div style="height:100px;width:25%;float:left;margin-right:15%">
        <div style="height:100px;width:25%;float:left;padding-top:40px">
            <a href="#"><span class="glyphicon glyphicon-shopping-cart"></span>购物车</a>
        </div>
        <div style="height:100px;width:25%;float:left;padding-top:40px">
        <a href="#">帮助中心</a>
        </div>
        <div style="height:100px;width:25%;float:left;padding-top:40px">
            <c:if test="${sessionScope.user==null}" var="f">
                <a href="${pageContext.request.contextPath }/client/login.jsp">个人帐户</a>
            </c:if>
            <c:if test="${!f }">
                <a href="${pageContext.request.contextPath }/client/user.jsp">${sessionScope.user.username }</a>
            </c:if>
        </div>
        <div style="height:100px;width:25%;float:left;padding-top:40px">
            <a href="${pageContext.request.contextPath }/client/register.jsp">用户注册</a>
        </div>
    </div>
</div>
</body>
</html>

3.login.jsp

###代码

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<title>登陆</title>
<!-- 这里的href请写本身的bootstrap的css的连接。若是没有下载，能够用这个 -->
<!-- https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css -->
<link rel="stylesheet" href="${pageContext.request.contextPath }/bootstrap-3.3.7-dist/css/bootstrap.min.css">
<!-- jquery和bootstrap的连接能够用下面的 -->
<!-- https://cdn.jsdelivr.net/npm/jquery@1.12.4/dist/jquery.min.js -->
<!-- https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js -->
<script type="text/javascript" src="${pageContext.request.contextPath}/jquery-3.3.1/jquery-3.3.1.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
<!-- login.js是我本身写的，里面放了判断输入是否合理，以及验证码的正确与否的。以后放上了。 -->
<script type="text/javascript" src="${pageContext.request.contextPath}/client/js/login.js"></script>
</head>
<body style="background-color:#bbb">
<font size="7" style="color:red;">${errorMsg }</font>
<!-- 调用头部页面 -->
<div style="width:100%;height:100px;float:left">
<jsp:include page="head.jsp"></jsp:include>
</div>
<!-- 通用内容体大小 -->
<div style="width:70%;height:720px;float:left;margin-left:15%;">
    <!-- 好看的图 -->
    <div style="width:55%;height:100%;float:left;margin-top:10%;">
        <img alt="拿书男孩" src="${pageContext.request.contextPath }/client/img/boy.jpg" style="width:90%;">
    </div>
    <!-- 登陆界面 -->
    <div style="width:45%;height:80%;float:left;margin-top:7%">
        <h1 style="color:#8b6914;text-align:center">用户登陆</h1>
        <hr style="height:2px;border:none;border-top:5px ridge green;" />
        <form action="${pageContext.request.contextPath }/Login" method="post" class="form-horizontal" role="form">
            <div class="form-group">
                <label for="lastname" class="col-sm-3 control-label input-lg">昵称</label>
                <div class="col-sm-9">
                    <input type="text" name="username" id="username" class="form-control input-lg"
                           placeholder="请输入昵称" style="float:left"/>
                </div>
            </div>
            <div class="form-group">
                <label for="firstname" class="col-sm-3 control-label input-lg">密码</label>
                <div class="col-sm-9">
                    <input type="password" name="password" id="password" 
                    class="form-control input-lg" placeholder="请输入密码" style="float:left"/>
                </div>
            </div>
            
            <div class="form-group">
                <label for="firstname" class="col-sm-3 control-label input-lg">验证码</label>
                <div class="col-sm-9">
                    <input type="text" id="code"
                    class="form-control input-lg" placeholder="请输入验证码" style="width:45%;float:left"/>
                    <img src="${pageContext.request.contextPath}/imageCode"
                    width="180"height="30"class="textinput"
                    style="height:42px;width:55%;"id="img"/>
                    <a href="javascript:void(0);"id="a1" >换一张</a>
                </div>
            </div>
            <div class="form-group">
                <label for="firstname" class="col-sm-1 control-label input-lg"></label>
                <div class="col-sm-5">
                    <input type="submit" name="submit" value="提交"
                    class="form-control input-lg btn btn-primary"style="width:100%;float:left"/>
                </div>
                <div class="col-sm-5">
                    <input type="reset" name="reset" value="重置" id="re"
                    class="form-control input-lg btn btn-warning"style="width:100%;float:left"/>
                </div>
            </div>
        </form>
        <span style="margin-left:10%">尚未账号？请先<a href="${pageContext.request.contextPath }/client/register.jsp">注册</a>！</span>
    </div>
</div>
<!-- 调用底部页面 -->
<div style="width:100%;height:60px;float:left">
<jsp:include page="foot.jsp"></jsp:include>
</div>
</body>
</html>

效果图

4.login.js

代码

由于貌似jquery的post提交是在其余代码结束以后才运行的，因而我取巧把二维码的验证和表单提交分开写了，我的认为也算是个不错的思路吧~数据库

$(function(){
    var code;
    $.post("../CheckCode",function(data){
        code=data;
    });
    $("#a1").click(function(){
        $("#img").attr("src","/bookstore/imageCode?time="+new Date().getTime());
    });
    var flag;
    $("#code").keyup(function(){
        $.post("/bookstore/CheckCode",function(data){
            code=data;
            if(code==$("#code").val()){
                flag=true;
            }
            else{
                flag=false;
            }
        });     
    });
    $("form").submit(function(){
        if(flag){
            return true;
        }else{
            alert("验证码错误");
            return false;
        }
    });
});

5.userServiceImpl的login方法

代码

我的感受设计的仍是挺精妙的，能够用一个函数就检测用户名是否存在，密码是否正确，同时也能在正确的时候返回user对象。npm

@Override
    public Object login(String username, String password) throws SQLException {
        // TODO Auto-generated method stub
        User user = dao.findUserByName(username);
        if(user==null) {
            return "user";
        }else {
            if(user.getPassword().equals(password)) {
                return user;
            }else {
                return "pass";
            }
        }
    }

6.LoginServlet

代码

接收用户名密码，而后调用userService的login方法，并对返回值作出相应处理。bootstrap

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 LoginServlet
 */
@WebServlet("/Login")
public class LoginServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public LoginServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        try {
            // TODO Auto-generated method stub
            String username = request.getParameter("username");
            String password = request.getParameter("password");
            UserService userService = new UserServiceImpl();
            Object login = userService.login(username, password);
            if(login.equals("user")) {
                request.setAttribute("errorMsg", "用户名不存在");
                request.getRequestDispatcher("client/login.jsp").forward(request, response);
            }else if(login.equals("pass")) {
                request.setAttribute("errorMsg", "密码错误");
                request.getRequestDispatcher("client/login.jsp").forward(request, response);
            }else {
                User user = (User) login;
                request.getSession().setAttribute("user", user);
                response.sendRedirect("client/index.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);
    }

}

7.user.jsp

代码

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<title>空白</title>
</head>
<body style="background-color:#bbb">
<!-- 调用头部页面 -->
<div style="width:100%;height:100px;float:left">
<jsp:include page="/client/head.jsp"></jsp:include>
</div>
<!-- 通用内容体大小 -->
<div style="width:70%;height:720px;float:left;margin-left:15%;">
<a href="${pageContext.request.contextPath }/Logout">退出登陆</a>
</div>
<!-- 调用底部页面 -->
<div style="width:100%;height:60px;float:left">
<jsp:include page="/client/foot.jsp"></jsp:include>
</div>
</body>
</html>

效果图

8.LogoutServlet

移除session域中的user属性，而后跳转回主页。网络

package cn.edu.bdu.mc.servlets;

import java.io.IOException;
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 LogoutServlet
 */
@WebServlet("/Logout")
public class LogoutServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public LogoutServlet() {
        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
        request.getSession().removeAttribute("user");
        response.sendRedirect("client/index.jsp");
    }

    /**
     * @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);
    }

}

9.BookService的改动——添加图片

代码

差点忘了往上放这部分。。。

@Override
    public void addImg(int book_id, String path) throws SQLException, IOException {
        // TODO Auto-generated method stub
        dao.addImg(book_id, path);
    }

    @Override
    public InputStream getImgById(int book_id) throws SQLException {
        // TODO Auto-generated method stub
        return dao.getImgById(book_id);
    }
//好像应该看dao里的，，
/*
    @Override
    public void addImg(int book_id, String path) throws SQLException, IOException {
        // TODO Auto-generated method stub
        Connection conn = null;
        PreparedStatement ps = null;
        FileInputStream in = null;
        in = new FileInputStream(new File(path));
        conn = JDBCUtil.getConn();
        String sql = "update book set book_img = ? where book_id = ?";
        ps = conn.prepareStatement(sql);
        ps.setBinaryStream(1, in, in.available());
        ps.setInt(2, book_id);
        int count = ps.executeUpdate();
        if (count > 0) {
            System.out.println("插入成功！");
        } else {
            System.out.println("插入失败！");
        }
        JDBCUtil.release(conn, ps);
    }

    @Override
    public InputStream getImgById(int book_id) throws SQLException {
        // TODO Auto-generated method stub
        Connection conn = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        InputStream in = null;
        try {
            conn = JDBCUtil.getConn();
            String sql = "select book_img from book where book_id = ?";
            ps = conn.prepareStatement(sql);
            ps.setInt(1, book_id);
            rs = ps.executeQuery();
            while (rs.next()) {
                in = rs.getBinaryStream("book_img");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        JDBCUtil.release(conn, ps, rs);
        return in;
    }
*/
//注意，必定不要忘记释放链接，否则你网页卡半天也加载不出来图片。。。

总结

今天遇到的错误还挺多的，好在都解决得差很少了，主页终于完工了，而后今天其实打代码的时间比较少，啊，作不完啦作不完啦！好烦啊！

相关文章
相关标签/搜索
每日一句
    每一个你不满意的现在，都有一个你没有努力的曾经。
本站公众号
   欢迎关注本站公众号,获取更多信息
联系我们 最近搜索 最新文章 沪ICP备13005482号-10 MyBatis教程 SQL 教程 MySQL教程 Java 教程 Thymeleaf 教程 Hibernate教程 Spring教程 Redis教程