EclipseEE+Tomcat8+MySQL+花生殼 實現簡單的購物網站（外網可訪問）

原創 PonusJang 2018-09-12 04:05 
/*集大成者，美若天成*/

package cart;

import java.sql.Connection;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Map;
import java.util.TreeMap;

import util.JDBCUtil;

/* 購物車類   */
public class Cart {
    
    /* 屬性：商品，採用Map；Key爲商品編號，Value爲商品   */
   private Map<Integer, Product> product =new TreeMap<Integer, Product>();
   
   Connection conn = null;
   Statement stat = null;
   ResultSet rs = null;
   PreparedStatement prstat = null;
   
   /*  根據商品編號向購物車添加商品  */
   public void addProduct(int id) throws SQLException{
       conn  = JDBCUtil.getConnection();           /*  與數據庫建立連接    */
       stat = conn.createStatement();
       String sql = "select * from product"; 
       rs = stat.executeQuery(sql); 
       
       /*  從ResultSet獲取商品信息，加入Map中  */
       while(rs.next()){
              Product teppro =new Product(
                rs.getInt("idproduct"),
                   rs.getString("name"),
                   rs.getString("brand"),
                   rs.getInt("price")
                   );  
           product.put(teppro.getId(), teppro);
       } 
       /*  foreach遍歷Map  */
       for(Map.Entry<Integer, Product> pro : product.entrySet()) {
              int pid = pro.getKey();
              if(pid == id){ /* 找到要加入的商品id   */
                  sql  = "select * from cart where idproduct = "+pid;
                  System.out.println(sql);
                  rs = stat.executeQuery(sql);    /*    */
                  /*  查詢購物中是否已存在該商品  */
                  if(rs.next()){
                      int amo = 1 + rs.getInt("amount") ;     /*  商品數量加一  */
                      sql = "update cart set amount = ? where idproduct = ?";
                      System.out.println(sql);
                      prstat = conn.prepareStatement(sql);
                      prstat.setInt(1, amo);
                      prstat.setInt(2, pid);
                      prstat.execute();
                      /*  設置單品總價  */
                      sql = "update cart set total = ? where idproduct = ?";
                      prstat = conn.prepareStatement(sql);
                      prstat.setInt(1, amo*rs.getInt("price"));
                      prstat.setInt(2, pid);
                      prstat.execute();
                     
                  }else {  /*   當購物車中不存在該商品，添加該商品 */
                      Product p = pro.getValue();System.out.println(p.toString());
                      sql = "insert into cart(idproduct,name,brand,price,amount,total) "
                              + "values(?,?,?,?,?,?)";
                      prstat = conn.prepareStatement(sql);
                      prstat.setInt(1, p.getId());
                      prstat.setString(2, p.getName());
                      prstat.setString(3, p.getBrand());
                      int pr =  p.getPrice();
                      prstat.setInt(4,pr);
                      prstat.setInt(5, 1);/* 商品個數爲1   */
                      prstat.setInt(6,pr);
                      prstat.execute();
                  }
              }
       }
       
       JDBCUtil.closeConnection(conn);
   }
   
   
   /*   清除購物車所有商品   */
   public void clearCart() throws SQLException{
       conn  = JDBCUtil.getConnection();
       stat = conn.createStatement();
       String sql = "select * from cart";
       rs = stat.executeQuery(sql); 
       while(rs.next()){
              Product teppro =new Product(
                   rs.getInt("idproduct"),
                      rs.getString("name"),
                      rs.getString("brand"),
                      rs.getInt("price")
                      );  
           product.put(teppro.getId(), teppro);
       }
       for(Map.Entry<Integer, Product> pro : product.entrySet()) {
           int pid = pro.getKey();
           sql = "delete from cart where idproduct = ? ";
           prstat = conn.prepareStatement(sql);
           prstat.setInt(1, pid);
           prstat.execute();
       }
       JDBCUtil.closeConnection(conn);
   }
   
   /*   清除購物車單一商品   */
   public void clearProduct(int id) throws SQLException{
       conn  = JDBCUtil.getConnection();
       stat = conn.createStatement();
       String sql = "select * from cart";
       rs = stat.executeQuery(sql); 
       while(rs.next()){
              Product teppro =new Product(
                   rs.getInt("idproduct"),
                      rs.getString("name"),
                      rs.getString("brand"),
                      rs.getInt("price")
                      );  
           product.put(teppro.getId(), teppro);
       }
       for(Map.Entry<Integer, Product> pro : product.entrySet()) {
           int pid = pro.getKey();
           if(id==pid){       
           sql = "delete from cart where idproduct = ? ";
           prstat = conn.prepareStatement(sql);
           prstat.setInt(1, pid);
           prstat.execute();
           }
       }
       JDBCUtil.closeConnection(conn);
   }
   
   
  /*修改單品數量*/
   public void changeAmount(int idp ,int amon) throws SQLException{
       conn  = JDBCUtil.getConnection();
       stat = conn.createStatement();
       String sql = "select * from cart";
       rs = stat.executeQuery(sql); 
       while(rs.next()){
              Product teppro =new Product(
                   rs.getInt("idproduct"),
                      rs.getString("name"),
                      rs.getString("brand"),
                      rs.getInt("price")
                      );  
           product.put(teppro.getId(), teppro);
       }
       for(Map.Entry<Integer, Product> pro : product.entrySet()) {
           int pid = pro.getKey();System.out.println(pid);
           if(pid==idp){
               sql = "update cart set amount = ? where idproduct = ? ";
               prstat = conn.prepareStatement(sql);
               prstat.setInt(1, amon);
               prstat.setInt(2 , idp);
               prstat.execute();
           }
        }
       JDBCUtil.closeConnection(conn);
   }
   
}
package cart;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import util.JDBCUtil;
/*  用戶類      */
public class User {
    
   private String username;
   private String password;
   
   Connection conn = null;
   Statement stat = null;
   ResultSet rs = null;
   
   /*  驗證登錄信息    */
   public boolean login() throws SQLException{
        Connection conn = JDBCUtil.getConnection();
        Statement stat = conn.createStatement();
        String sql = "select * from user"; 
        ResultSet rs = stat.executeQuery(sql);
        while(rs.next()){
            User us = new User(rs.getString("username"),rs.getString("psd"));us.toString();
            if(us.equals(this)){
                 return true;
            }
        }return false;
   }
   
@Override
public String toString() {
    return "User [username=" + username + ", password=" + password + "]";
}
public User(String username, String password) {

    this.username = username;
    this.password = password;
}
public String getUsername() {
    return username;
}
public void setUsername(String username) {
    this.username = username;
}
public String getPassword() {
    return password;
}
public void setPassword(String password) {
    this.password = password;
}

@Override
public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((password == null) ? 0 : password.hashCode());
    result = prime * result + ((username == null) ? 0 : username.hashCode());
    return result;
}

@Override
public boolean equals(Object obj) {
    if (this == obj)
        return true;
    if (obj == null)
        return false;
    if (getClass() != obj.getClass())
        return false;
    User other = (User) obj;
    if (password == null) {
        if (other.password != null)
            return false;
    } else if (!password.equals(other.password))
        return false;
    if (username == null) {
        if (other.username != null)
            return false;
    } else if (!username.equals(other.username))
        return false;
    return true;
}


   
   
   
}
package cart;

/*    商品類      */
public class Product {
    
   private int id;/* 商品編號  */
   private String name;/*商品名稱*/
   private String brand;/*商品品牌*/
   private int price;/*商品價格*/
   
   
   /* 構造函數   */ 
public Product(int id, String name, String brand, int price) {
    super();
    this.id = id;
    this.name = name;
    this.brand = brand;
    this.price = price;
}

public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public String getBrand() {
    return brand;
}
public void setBrand(String brand) {
    this.brand = brand;
}
public int getPrice() {
    return price;
}
public void setPrice(int price) {
    this.price = price;
}
   
@Override
public String toString() {
    return "Product [id=" + id + ", name=" + name + ", brand=" + brand
            + ", price=" + price + "]";
}

   
}
package util;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

public class JDBCUtil {

    private static String driverName = "com.mysql.jdbc.Driver";
    private static String URL = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=GBK";
    private static String userName = "root";//根據自己數據庫
    private static String password = "12345";


    /*   註冊驅動       */
    public static void registerDriver() {
        try {
            Class.forName(driverName);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
            System.out.println("找不到驅動");
        }
    }
    
    /*  連接數據庫     */
    public static Connection getConnection() throws SQLException {
        registerDriver();
        Connection conn = null;
        System.out.println("正在連接數據庫...");
        conn = DriverManager.getConnection(URL, userName, password);
        System.out.println("數據庫已連接!");
        return conn;

    }
    
    /*  關閉連接    */
    public static void closeConnection(Connection conn) {
        System.out.println("正在釋放所有資源...");
        try {
            if (conn != null) {
                conn.close();
                conn = null;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
    
    /*
     * 釋放所有資源
     */
    public static void realeaseAll(Statement st,Connection conn){
        if (st!=null){
            try {
                st.close();
                st = null;
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        closeConnection(conn);
    }
    
    

}
<%@page import="java.util.LinkedList"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
<%@ page import="java.sql.*,util.JDBCUtil,cart.Product,java.util.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>商品信息</title>
</head>

<!-- 設置背景圖片 -->
<style type="text/css">    
 body{    
      background-image: url(background.jpg);    
      background-size :100%;  
 }    
</style>

<!-- 設置字體 -->
<style type="text/css">
#product
  {
  font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;
  width:70%;
  border-collapse:collapse;
  }

#product td, #product th 
  {
  font-size:1em;
  border:1px solid #98bf21;
  padding:3px 7px 2px 7px;
  }

#product th 
  {
  font-size:1.1em;
  text-align:left;
  padding-top:5px;
  padding-bottom:4px;
  background-color:#A7C942;
  color:#ffffff;
  }

#product tr.blt td 
  {
  color:#000000;
  background-color:#FFFFFF;
}
 
#product tr.alt td 
  {
  color:#000000;
  background-color:#EAF2D3;
  }
</style>

<!-- 建立數據庫連接，獲取所有商品信息-->
<%  
Connection conn = JDBCUtil.getConnection();
Statement stat = conn.createStatement();
String sql = "select * from product"; 
ResultSet rs = stat.executeQuery(sql); 
%>   

<!-- 顯示商品信息-->
<body>
<% 
String username = null;
%>
<!-- 顯示歡迎信息 -->
    <div align="center">
        <br>  
        <% 
          username =  request.getParameter("username");
          if(username == null) out.println("<a href='login.jsp'>用戶登錄                     </a>  ");
          else out.println("歡迎您，"+  username +" &nbsp&nbsp  <a href='operate.jsp?&op=exit&username="+username+"'>退出             </a>  ");
        %>
              
   </div>

<!-- 輸出商品信息 -->
  <div align="center">
    <table id="product" border="2" width="400">  
        <tr class="alt" >  
            <td align="center" width="90">商品編號</td>   
            <td align="center" width="90">商品名稱</td>  
            <td align="center" width="90">商品品牌</td>  
            <td align="center" width="90">商品價格</td>  
            <td align="center" width="90">點擊購買</td>
        </tr>
        <%
        /*  將商品信息讀出    */
        List<Product> pl = new LinkedList<Product>();
        while(rs.next()){
            pl.add(new Product(
                    rs.getInt("idproduct"),
                    rs.getString("name"),
                    rs.getString("brand"),
                    rs.getInt("price")
                    ));
        }
        int i=1;
        for(Product pro:pl){
            if(i%2==0)out.println("<tr  class='alt' >"); 
            else out.println("<tr class='blt'  >"); i++;
            out.println("<td align='center' width='90'>"  +pro.getId()+"    </td>");
            out.println("<td align='center' width='90'>"  +pro.getName()+"  </td>");
            out.println("<td align='center' width='90'>"  +pro.getBrand()+" </td>");
            out.println("<td align='center' width='90'>￥"  +pro.getPrice()+" </td>");
            out.println("<td><a href='operate.jsp?op=add&id="+pro.getId()+"&username="+username+"'>加入購物車</a></td>"); 
            out.println("</tr>");  
        }
        %>
    </table> 
        </div>
        
<!--查看購物、清空購物車 -->
<div align="center">
           <br> 
            <%
               out.println("<a href='cart.jsp?username="+username+"'>查看購物車                       </a>  &nbsp &nbsp ");
               out.println(" <a href='operate.jsp?op=clear&username="+username+"'>清空購物車</a>     ");
            %>
                
                
</div>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>用戶登錄</title>
</head>

<!-- 設置背景圖片 -->
<style type="text/css">    
 body{    
      background-image: url(background.jpg);    
      background-size :100%;  
 }
 </style>
 
 <!-- 設置字體-->
<style type="text/css">
p.serif{font-family:Arial,Verdana,Sans-serif}
</style>

<body>
   <div align="center">
    <form name="postForm" action="dologin.jsp" method="get">    
        <p  class="serif">用戶名 :<input type="text" name="username" /></p>
          <p  class="serif">密&nbsp&nbsp&nbsp&nbsp碼:<input type="password" name="password" /></p>
        <input type="submit" value="登錄" /> &nbsp &nbsp    &nbsp &nbsp    
          <a href="index.jsp">返回                  </a> 
    </form>


             

</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>用戶登錄</title>
</head>

<!-- 設置背景圖片 -->
<style type="text/css">    
 body{    
      background-image: url(background.jpg);    
      background-size :100%;  
 }
 </style>
 
 <!-- 設置字體-->
<style type="text/css">
p.serif{font-family:Arial,Verdana,Sans-serif}
</style>

<body>
   <div align="center">
    <form name="postForm" action="dologin.jsp" method="get">    
        <p  class="serif">用戶名 :<input type="text" name="username" /></p>
          <p  class="serif">密&nbsp&nbsp&nbsp&nbsp碼:<input type="password" name="password" /></p>
        <input type="submit" value="登錄" /> &nbsp &nbsp    &nbsp &nbsp    
          <a href="index.jsp">返回                  </a> 
    </form>


             

</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import=  "cart.Cart" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>operating</title>
</head>
<body>
<!-- 連接數據庫，計算總價 -->
<style type="text/css">    
 body{    
      background-image: url(background.jpg);    
      background-size :100%;  
 }    
</style>

<script>
function RepNumber(obj) {
    var reg = /^[\d]+$/g;
    if (!reg.test(obj.value)) {
    var txt = obj.value;
    txt.replace(/[^0-9]+/, function (char, index, val) {//匹配第一次非數字字符
    obj.value = val.replace(/\D/g, "");//將非數字字符替換成""
    var rtextRange = null;
    if (obj.setSelectionRange) {
    obj.setSelectionRange(index, index);
    } else {//支持ie
    rtextRange = obj.createTextRange();
    rtextRange.moveStart('character', index);
    rtextRange.collapse(true);
    rtextRange.select();
    }
    })
    }
    } 
</script>

<%
   String op = null;
   String username = null;
   String number = null;
   int id = 0;
   Cart cart = new Cart();
   op = request.getParameter("op");
   username = request.getParameter("username");
  
   
   if( !op.equals("exit") && (username == null || username.equals("null") || username.equals(null))){
       out.println(" &nbsp &nbsp  請登錄....");
       response.setHeader("Refresh","1;URL=index.jsp"); 
   }else if(op.equals("add")){
       id = Integer.parseInt(request.getParameter("id"));
       cart.addProduct(id);
       out.println(" &nbsp &nbsp  正在添加商品....");
       response.setHeader("Refresh","0;URL=cart.jsp？username="+username);
   }else if(op.equals("clear")){
       cart.clearCart();
       out.println(" &nbsp &nbsp  正在清除購物車....");
       response.setHeader("Refresh","0;URL=cart.jsp？username="+username);
   }else if(op.equals("pay")){
       out.println(" &nbsp &nbsp  正在結算....");
       response.setHeader("Refresh","0;URL=pay.jsp？username="+username);
   }else if(op.equals("exit")){
       cart.clearCart();
       out.println(" &nbsp &nbsp  正在登出....");
       response.setHeader("Refresh","0;URL=index.jsp");  
   }else if(op.equals("delete")){
       id = Integer.parseInt(request.getParameter("id"));
       cart.clearProduct(id);
       out.println(" &nbsp &nbsp  正在退回....");
       response.setHeader("Refresh","0;URL=cart.jsp?username="+username);  
   }else if(op.equals("paid")){
       out.println("<div align='center' >");
       out.println(" &nbsp &nbsp 已經成功付款，順豐快遞將盡快爲您配送....");
       out.println("<div>");
       cart.clearCart();
       response.setHeader("Refresh","2;URL=index.jsp？username="+username);
   }else if(op.equals("change")){
       id = Integer.parseInt(request.getParameter("id"));
       out.println("<div align='center' >");
       out.println("<form name='postForm' action='operate.jsp' method='get'>    ");
       out.println("請輸入數量：");
       out.println("<input type='text' name='number'  onkeyup='javascript:RepNumber(this)'/>");
       out.println("<input type=hidden name='id' value="+ id+">" );
       out.println("<input type=hidden name='op' value=changed>" );
       out.println(" <input type=hidden name='username' value="+ username+">");
       out.println(" <input type='submit' value='提交' /> ");
       out.println("</form>");
       out.println("<div>");
   }else if(op.equals("changed")){
        id = Integer.parseInt(request.getParameter("id"));
        cart.changeAmount(id,Integer.parseInt(request.getParameter("number")));
        out.println(" &nbsp &nbsp   修改成功....");
        response.setHeader("Refresh","0;URL=cart.jsp?username="+username);
   }

   
%>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
 <%@ page import="java.sql.*,util.JDBCUtil,cart.*,java.util.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>    支付頁面    </title>
</head>
<body>
<%
String username = request.getParameter("username");
%>

<!-- 設置背景圖片 -->
<style type="text/css">    
 body{    
      background-image: url(background.jpg);    
      background-size :100%;  
 }    
</style>  

<!-- 連接數據庫，計算總價 -->
<div  align="center"  >
<%
Connection conn = JDBCUtil.getConnection();
Statement stat = conn.createStatement();
String sql = "select * from cart"; 
ResultSet rs = stat.executeQuery(sql); 

int sum = 0;

while(rs.next()){
    sum+=rs.getInt("price")*rs.getInt("amount");
}
out.println(" &nbsp 需支付￥ ："+sum);
JDBCUtil.closeConnection(conn);
%>
</div>

<!-- 選擇收貨地址 -->
<div align="center" >
選擇送貨地址：
<select  >
<option value="1" selected>福建</option>
</select>
 &nbsp &nbsp 
<select >
<option value="1" selected>廈門</option>
<option value="2" >泉州</option>
<option value="3">漳州</option>
</select>
&nbsp &nbsp 
具體地址 :<input type="text" name="address" size=20 />
&nbsp &nbsp 

 <% 
 out.println("<a href='operate.jsp?op=paid&username="+username+"'>確定付款</a>   &nbsp &nbsp  ");
 out.println("<a href='cart.jsp?username="+username+"'>返回購物車</a>   &nbsp &nbsp  ");
 %> 
</div>

</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="java.sql.*,util.JDBCUtil,cart.Product,java.util.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>我的購物車</title>
</head>
<!-- 設置背景 -->
<style type="text/css">    
 body{    
      background-image: url(background.jpg);    
      background-size :100%;  
 }    
</style>  

<!-- 表格美化 -->
<style type="text/css">
#product
  {
  font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;
  width:70%;
  border-collapse:collapse;
  }

#product td, #product th 
  {
  font-size:1em;
  border:1px solid #98bf21;
  padding:3px 7px 2px 7px;
  }

#product th 
  {
  font-size:1.1em;
  text-align:left;
  padding-top:5px;
  padding-bottom:4px;
  background-color:#A7C942;
  color:#ffffff;
  }

#product tr.blt td 
  {
  color:#000000;
  background-color:#FFFFFF;
}
 
#product tr.alt td 
  {
  color:#000000;
  background-color:#EAF2D3;
  }
</style>

<!-- 連接數據庫 -->
<% 
Connection conn = JDBCUtil.getConnection();
Statement stat = conn.createStatement();
String sql = "select * from cart"; 
ResultSet rs = stat.executeQuery(sql); 
String username = null;
%>
<body>
    <div align="center">
<% 
username = request.getParameter("username");
if(username == null || username.equals("null") || username.equals(null)){
    out.println(" &nbsp &nbsp  請登錄....");
    response.setHeader("Refresh","0;URL=index.jsp"); 
}else
out.println("歡迎您，"+  username +" &nbsp&nbsp  <a href='operate.jsp?op=exit&username"+username+"'>退出             </a>  ");
%>
</div>

  <!-- 輸出購物車內容 -->
  
 <div align="center">
    <table border="2" width="600">  
        <tr class='alt'>  
            <td align="center" width="90">商品編號</td>   
            <td align="center" width="90">商品名稱</td>  
            <td align="center" width="90">商品品牌</td>  
            <td align="center" width="90">商品價格</td>  
            <td align="center" width="90">購買數量</td>
            <td align="center" width="90">單品總價</td>
            <td align="center" width="90">退回商品</td>
            <td align="center" width="90">修改數量</td>
        </tr>
        <%
        int j=1;int sum=0;
        while(rs.next()){
            int k,p,m;
            if(j%2==0)out.println("<tr  class='alt' >"); 
            else out.println("<tr class='blt'  >"); j++; 
            out.println("<td align='center' width='90'>"  +(k=rs.getInt("idproduct"))+"    </td>");
            out.println("<td align='center' width='90'>"  +rs.getString("name")+"  </td>");
            out.println("<td align='center' width='90'>"  +rs.getString("brand")+" </td>");
            out.println("<td align='center' width='90'>"  +(p=rs.getInt("price"))+" </td>");
            out.println("<td align='center' width='90'>"  +(m=rs.getInt("amount"))+" </td>");
            out.println("<td align='center' width='90'>￥"  +p*m+"  </td>");
            out.println("<td align='center' width='90'>"+ "<a href='operate.jsp?op=delete&username="+username+"&id="+ k+"'>點擊退回</a></td>");
            out.println("<td align='center' width='90'>"+ "<a href='operate.jsp?op=change&username="+username+"&id="+ k+"'>點擊修改</a></td>");
            out.println("</tr>");  
            sum+=p*m;
        }
        %>
    </table> 
      </div>
     <div align="center">
        <br>  
    <%
    out.println("總計：￥   "+sum+" &nbsp &nbsp  ");
    out.println(" <a href='index.jsp?username="+username+"'>繼續購物                        </a>    &nbsp &nbsp      ");
    out.println("<a href='operate.jsp?op=clear&username="+username+"'>清空購物車</a>    &nbsp &nbsp  ");
    out.println("  <a href='operate.jsp?op=pay&username="+username+"'>結算</a>   &nbsp &nbsp  ");
    %>    
        
    </div>
</body>
</html>

wKioL1WvF9qgaNN5AAKiloHS950621.jpg

       這是網站採用的背景，個人覺得還不錯。

      這樣代碼部分就完工了。雖然還是缺少某些功能，以及有些處理不恰當，但總體還是可以的。接下來我們往數據庫添加內容。注意網頁字符集和數據庫字符集,可能會出現亂碼。

wKioL1WvGy2wUU-3AAGCf3qvQ-g268.jpg

       接着我們下載花生殼並安裝好，申請一個免費域名（要花1元錢實名認證來着），然後將你的ip映射到外網。

wKiom1WvGwTwZhU8AAEsc8mdrb4473.jpg

wKioL1WvHOiS4aweAAEgRVYp3_0682.jpg

       由於我的tomcat的8080端口被佔用了，所以改成了8088端口。那麼怎麼改端口號還有需要改什麼，網上教程有很多，我這裏簡單陳述一下。進入tomcat文件夾，打開conf文件夾裏的server.xml，搜索一下第一個8080，將其改成8088或其他，如果沒被佔用就不必改了。除此之外，搜索localhost並替換成xxxx.xicp.net。這樣就可以了。

       最後我們看一下成果。

wKiom1WvHa2DDFVIAAKoOlGhPDI292.jpg

wKioL1WvH5KA3IJDAAIxTBruOdQ475.jpg

wKiom1WvHbDhQESjAAMmdoNuGZY826.jpg


發表評論
所有評論
還沒有人評論，想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.
相關文章

MySQL基礎

莫渺1996 2019-02-24 13:34:23

6:多源複製的實現

shixiazhoujun 2019-02-24 13:04:18

7:基於語句和行復制的優缺點

shixiazhoujun 2019-02-24 13:04:18

詳解MySQL執行原理、邏輯分層、更改數據庫處理引擎

laozhang 2019-02-24 12:43:05

MySQL中InnoDB和MyISAM的差別

jackieban 2019-02-23 13:57:24

SQL mapper文件的審計

橡皮高 2019-02-23 13:51:10

數據庫管理工具 Navicat使用教程：SQL Server中的磁盤加密

Aote222 2019-02-23 13:34:13

Redhat環境MySQL+Apache+PHP環境配置

znlingdong 2019-02-23 13:29:59

MySQL 常用

loip125 2019-02-23 13:29:07

MySQL字符集選擇

兩袖春風 2019-02-23 13:28:22

dwr的javaBean操作

yi_sixian 2019-02-23 14:05:23

自定義標籤

yi_sixian 2019-02-23 14:05:20

關於jdbc的模塊化和事務處理

yi_sixian 2019-02-23 14:00:41

關於網銀項目完工總結

yi_sixian 2019-02-23 13:55:03

導航的那些事

mappleable 2019-02-23 13:50:59