最近期末的JSP要交大作业，我选择的是做一个在线购物书店,实现登陆注册购物车结算的功能。
一.项目总览以及使用的JS组件框架:
根据项目结构 知道用的是DAO设计模式，然后使用了
JS组件库SUI,然后看看项目完成以后大概是这样.
引导页
注册
登陆
图书列表
图书详情以及购物车
结算
二.数据库设计以及代码实现
user_profile表:实现登陆注册
book_details表:实现图书列表以及图书详情
payment表:实现结算
然后是代码:首先是根据数据库表生成的实体类:
UserProfile:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package pack;
import java.io.Serializable;
import java.util.Collection;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;
/**
*
* @author sl
*/
@Entity
@Table(name = "user_profile")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "UserProfile.findAll", query = "SELECT u FROM UserProfile u")
, @NamedQuery(name = "UserProfile.findByIdUserProfile", query = "SELECT u FROM UserProfile u WHERE u.idUserProfile = :idUserProfile")
, @NamedQuery(name = "UserProfile.findByUsername", query = "SELECT u FROM UserProfile u WHERE u.username = :username")
, @NamedQuery(name = "UserProfile.findByPassword", query = "SELECT u FROM UserProfile u WHERE u.password = :password")
, @NamedQuery(name = "UserProfile.findByFirstname", query = "SELECT u FROM UserProfile u WHERE u.firstname = :firstname")
, @NamedQuery(name = "UserProfile.findByMiddlename", query = "SELECT u FROM UserProfile u WHERE u.middlename = :middlename")
, @NamedQuery(name = "UserProfile.findByLastname", query = "SELECT u FROM UserProfile u WHERE u.lastname = :lastname")
, @NamedQuery(name = "UserProfile.findByAddress1", query = "SELECT u FROM UserProfile u WHERE u.address1 = :address1")
, @NamedQuery(name = "UserProfile.findByAddress2", query = "SELECT u FROM UserProfile u WHERE u.address2 = :address2")
, @NamedQuery(name = "UserProfile.findByCity", query = "SELECT u FROM UserProfile u WHERE u.city = :city")
, @NamedQuery(name = "UserProfile.findByState", query = "SELECT u FROM UserProfile u WHERE u.state = :state")
, @NamedQuery(name = "UserProfile.findByPincode", query = "SELECT u FROM UserProfile u WHERE u.pincode = :pincode")
, @NamedQuery(name = "UserProfile.findByEmail", query = "SELECT u FROM UserProfile u WHERE u.email = :email")
, @NamedQuery(name = "UserProfile.findByPhone", query = "SELECT u FROM UserProfile u WHERE u.phone = :phone")})
public class UserProfile implements Serializable {
@OneToMany(cascade = CascadeType.ALL, mappedBy = "username")
private Collection<Payment> paymentCollection;
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "idUser_Profile")
private Integer idUserProfile;
@Basic(optional = false)
@Column(name = "username")
private String username;
@Basic(optional = false)
@Column(name = "password")
private String password;
@Basic(optional = false)
@Column(name = "firstname")
private String firstname;
@Basic(optional = false)
@Column(name = "middlename")
private String middlename;
@Basic(optional = false)
@Column(name = "lastname")
private String lastname;
@Basic(optional = false)
@Column(name = "address1")
private String address1;
@Basic(optional = false)
@Column(name = "address2")
private String address2;
@Basic(optional = false)
@Column(name = "city")
private String city;
@Basic(optional = false)
@Column(name = "state")
private String state;
@Basic(optional = false)
@Column(name = "pincode")
private String pincode;
@Basic(optional = false)
@Column(name = "email")
private String email;
@Basic(optional = false)
@Column(name = "phone")
private int phone;
public UserProfile() {
}
public UserProfile(Integer idUserProfile) {
this.idUserProfile = idUserProfile;
}
public UserProfile(Integer idUserProfile, String username, String password, String firstname, String middlename, String lastname, String address1, String address2, String city, String state, String pincode, String email, int phone) {
this.idUserProfile = idUserProfile;
this.username = username;
this.password = password;
this.firstname = firstname;
this.middlename = middlename;
this.lastname = lastname;
this.address1 = address1;
this.address2 = address2;
this.city = city;
this.state = state;
this.pincode = pincode;
this.email = email;
this.phone = phone;
}
public Integer getIdUserProfile() {
return idUserProfile;
}
public void setIdUserProfile(Integer idUserProfile) {
this.idUserProfile = idUserProfile;
}
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;
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getMiddlename() {
return middlename;
}
public void setMiddlename(String middlename) {
this.middlename = middlename;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getAddress1() {
return address1;
}
public void setAddress1(String address1) {
this.address1 = address1;
}
public String getAddress2() {
return address2;
}
public void setAddress2(String address2) {
this.address2 = address2;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getPincode() {
return pincode;
}
public void setPincode(String pincode) {
this.pincode = pincode;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public int getPhone() {
return phone;
}
public void setPhone(int phone) {
this.phone = phone;
}
@Override
public int hashCode() {
int hash = 0;
hash += (idUserProfile != null ? idUserProfile.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof UserProfile)) {
return false;
}
UserProfile other = (UserProfile) object;
if ((this.idUserProfile == null && other.idUserProfile != null) || (this.idUserProfile != null && !this.idUserProfile.equals(other.idUserProfile))) {
return false;
}
return true;
}
@Override
public String toString() {
return "pack.UserProfile[ idUserProfile=" + idUserProfile + " ]";
}
@XmlTransient
public Collection<Payment> getPaymentCollection() {
return paymentCollection;
}
public void setPaymentCollection(Collection<Payment> paymentCollection) {
this.paymentCollection = paymentCollection;
}
}
BookDetails:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package pack;
import java.io.Serializable;
import java.util.Collection;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;
/**
*
* @author sl
*/
@Entity
@Table(name = "book_details")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "BookDetails.findAll", query = "SELECT b FROM BookDetails b")
, @NamedQuery(name = "BookDetails.findByIdBookDetails", query = "SELECT b FROM BookDetails b WHERE b.idBookDetails = :idBookDetails")
, @NamedQuery(name = "BookDetails.findByCategoryName", query = "SELECT b FROM BookDetails b WHERE b.categoryName = :categoryName")
, @NamedQuery(name = "BookDetails.findByBookId", query = "SELECT b FROM BookDetails b WHERE b.bookId = :bookId")
, @NamedQuery(name = "BookDetails.findByTitle", query = "SELECT b FROM BookDetails b WHERE b.title = :title")
, @NamedQuery(name = "BookDetails.findByAuthor", query = "SELECT b FROM BookDetails b WHERE b.author = :author")
, @NamedQuery(name = "BookDetails.findByPublisher", query = "SELECT b FROM BookDetails b WHERE b.publisher = :publisher")
, @NamedQuery(name = "BookDetails.findByIsbn", query = "SELECT b FROM BookDetails b WHERE b.isbn = :isbn")
, @NamedQuery(name = "BookDetails.findByPrice", query = "SELECT b FROM BookDetails b WHERE b.price = :price")
, @NamedQuery(name = "BookDetails.findByDescription", query = "SELECT b FROM BookDetails b WHERE b.description = :description")})
public class BookDetails implements Serializable {
@Basic(optional = false)
@Column(name = "pic")
private String pic;
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "idBook_Details")
private Integer idBookDetails;
@Basic(optional = false)
@Column(name = "category_name")
private String categoryName;
@Basic(optional = false)
@Column(name = "book_id")
private int bookId;
@Basic(optional = false)
@Column(name = "title")
private String title;
@Basic(optional = false)
@Column(name = "author")
private String author;
@Basic(optional = false)
@Column(name = "publisher")
private String publisher;
@Basic(optional = false)
@Column(name = "isbn")
private String isbn;
@Basic(optional = false)
@Column(name = "price")
private int price;
@Column(name = "description")
private String description;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "bookId")
private Collection<BillTable> billTableCollection;
public BookDetails() {
}
public BookDetails(Integer idBookDetails) {
this.idBookDetails = idBookDetails;
}
public BookDetails(Integer idBookDetails, String categoryName, int bookId, String title, String author, String publisher, String isbn, int price) {
this.idBookDetails = idBookDetails;
this.categoryName = categoryName;
this.bookId = bookId;
this.title = title;
this.author = author;
this.publisher = publisher;
this.isbn = isbn;
this.price = price;
}
public Integer getIdBookDetails() {
return idBookDetails;
}
public void setIdBookDetails(Integer idBookDetails) {
this.idBookDetails = idBookDetails;
}
public String getCategoryName() {
return categoryName;
}
public void setCategoryName(String categoryName) {
this.categoryName = categoryName;
}
public int getBookId() {
return bookId;
}
public void setBookId(int bookId) {
this.bookId = bookId;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public String getPublisher() {
return publisher;
}
public void setPublisher(String publisher) {
this.publisher = publisher;
}
public String getIsbn() {
return isbn;
}
public void setIsbn(String isbn) {
this.isbn = isbn;
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
@XmlTransient
public Collection<BillTable> getBillTableCollection() {
return billTableCollection;
}
public void setBillTableCollection(Collection<BillTable> billTableCollection) {
this.billTableCollection = billTableCollection;
}
@Override
public int hashCode() {
int hash = 0;
hash += (idBookDetails != null ? idBookDetails.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof BookDetails)) {
return false;
}
BookDetails other = (BookDetails) object;
if ((this.idBookDetails == null && other.idBookDetails != null) || (this.idBookDetails != null && !this.idBookDetails.equals(other.idBookDetails))) {
return false;
}
return true;
}
@Override
public String toString() {
return "pack.BookDetails[ idBookDetails=" + idBookDetails + " ]";
}
public String getPic() {
return pic;
}
public void setPic(String pic) {
this.pic = pic;
}
}
Payment:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package pack;
import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import javax.xml.bind.annotation.XmlRootElement;
/**
*
* @author sl
*/
@Entity
@Table(name = "payment")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "Payment.findAll", query = "SELECT p FROM Payment p")
, @NamedQuery(name = "Payment.findByIdPayment", query = "SELECT p FROM Payment p WHERE p.idPayment = :idPayment")
, @NamedQuery(name = "Payment.findByTotalAmount", query = "SELECT p FROM Payment p WHERE p.totalAmount = :totalAmount")
, @NamedQuery(name = "Payment.findByCreditcardNum", query = "SELECT p FROM Payment p WHERE p.creditcardNum = :creditcardNum")
, @NamedQuery(name = "Payment.findByCreditcardType", query = "SELECT p FROM Payment p WHERE p.creditcardType = :creditcardType")})
public class Payment implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Basic(optional = false)
@Column(name = "idPayment")
private Integer idPayment;
@Basic(optional = false)
@Column(name = "total_amount")
private int totalAmount;
@Basic(optional = false)
@Column(name = "creditcard_num")
private int creditcardNum;
@Basic(optional = false)
@Column(name = "creditcard_type")
private int creditcardType;
@JoinColumn(name = "bill_num", referencedColumnName = "bill_num")
@ManyToOne(optional = false)
private BillTable billNum;
@JoinColumn(name = "username", referencedColumnName = "username")
@ManyToOne(optional = false)
private UserProfile username;
public Payment() {
}
public Payment(Integer idPayment) {
this.idPayment = idPayment;
}
public Payment(Integer idPayment, int totalAmount, int creditcardNum, int creditcardType) {
this.idPayment = idPayment;
this.totalAmount = totalAmount;
this.creditcardNum = creditcardNum;
this.creditcardType = creditcardType;
}
public Integer getIdPayment() {
return idPayment;
}
public void setIdPayment(Integer idPayment) {
this.idPayment = idPayment;
}
public int getTotalAmount() {
return totalAmount;
}
public void setTotalAmount(int totalAmount) {
this.totalAmount = totalAmount;
}
public int getCreditcardNum() {
return creditcardNum;
}
public void setCreditcardNum(int creditcardNum) {
this.creditcardNum = creditcardNum;
}
public int getCreditcardType() {
return creditcardType;
}
public void setCreditcardType(int creditcardType) {
this.creditcardType = creditcardType;
}
public BillTable getBillNum() {
return billNum;
}
public void setBillNum(BillTable billNum) {
this.billNum = billNum;
}
public UserProfile getUsername() {
return username;
}
public void setUsername(UserProfile username) {
this.username = username;
}
@Override
public int hashCode() {
int hash = 0;
hash += (idPayment != null ? idPayment.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof Payment)) {
return false;
}
Payment other = (Payment) object;
if ((this.idPayment == null && other.idPayment != null) || (this.idPayment != null && !this.idPayment.equals(other.idPayment))) {
return false;
}
return true;
}
@Override
public String toString() {
return "pack.Payment[ idPayment=" + idPayment + " ]";
}
}
工具类util包下的数据库连接类BaseDao:
package util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
*
* @author sl
*/
public class BaseDao {
private static String driver="com.mysql.jdbc.Driver";
private static String url="jdbc:mysql://localhost/mydb";
private static String user="***";
private static String password="******";//这里数据库账号密码就不贴了
/***
22 * 连接数据库的方法
23 * @return
24 * @throws ClassNotFoundException
25 * @throws SQLException
26 */
public static Connection getCon() throws ClassNotFoundException, SQLException{
Class.forName(driver);//加载数据库驱动
System.out.println("测试加载数据库成功");
Connection con=DriverManager.getConnection(url, user, password);
System.out.println("测试数据库链接成功");
return con;
}
/***
36 * 关闭数据库的方法
37 * @param con
38 * @param ps
39 * @param rs
40 */
public static void close(Connection con,PreparedStatement ps,ResultSet rs){
if(rs!=null){//关闭资源，避免出现异常
try {
rs.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(ps!=null){
try {
ps.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(con!=null){
try {
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
/***
69 * 同意增删改的方法
70 * @param sql
71 * @param arr
72 * @return
73 */
public static boolean addUpdateDelete(String sql,Object[] arr){
Connection con=null;
PreparedStatement ps=null;
try {
con=BaseDao.getCon();//第一步 ：连接数据库的操作
ps=con.prepareStatement(sql);//第二步：预编译
//第三步：设置值
if(arr!=null && arr.length!=0){
for(int i=0;i<arr.length;i++){
ps.setObject(i+1, arr[i]);
}
}
int count=ps.executeUpdate();//第四步：执行sql语句
if(count>0){
return true;
}else{
return false;
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return false;
}
//测试用例
// public static void main(String[] args) {
// try {
// BaseDao.getCon();
// } catch (ClassNotFoundException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// } catch (SQLException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
// }
}
然后书DAO数据层的Book类以及User类的接口以及回调方法实现:
BookDao：
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package dao;
import java.util.List;
import pack.BookDetails;
/**
*
* @author sl
*/
public interface BookDao {
/***
15 * 图书的查询的方法
16 * @param sql
17 * @param arr
18 * @return
19 */
public List<BookDetails> select(String sql,Object[] arr);
/***
23 * 按照图书编号进行查询
24 * @param id
25 * @return
26 */
public BookDetails getBook(Integer id);
public List<BookDetails> getBooks(String category);
public List<BookDetails> queryAll();
}
BookDaoImpl:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import pack.BookDetails;
import util.BaseDao;
/**
*
* @author sl
*/
public class BookDaoImpl implements BookDao{
@Override
public List<BookDetails> select(String sql, Object[] arr) {
Connection con=null;
PreparedStatement ps=null;
ResultSet rs=null;
try {
con=BaseDao.getCon();//第一步连接数据库
ps=con.prepareStatement(sql);//第二步：预编译
if(arr!=null){
for(int i=0;i<arr.length;i++){
ps.setObject(i+1, arr[i]);
}
}
//第四步执行sql
rs=ps.executeQuery();
List<BookDetails> list=new ArrayList<BookDetails>();
while(rs.next()){
BookDetails book=new BookDetails();
book.setBookId(rs.getInt("book_id"));
book.setTitle(rs.getString("title"));
book.setAuthor(rs.getString("author"));
book.setPublisher(rs.getString("publisher"));
book.setIsbn(rs.getString("isbn"));
book.setPrice(rs.getInt("price"));
book.setPic(rs.getString("pic"));
book.setCategoryName("category_name");
list.add(book);
}
return list;
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
//关闭资源，避免出现异常
BaseDao.close(con, ps, rs);
}
return null;
}
//根据书的ID查找书本
@Override
public BookDetails getBook(Integer id) {
Connection con=null;
PreparedStatement ps=null;
ResultSet rs=null;
try {
con=BaseDao.getCon();//第一步连接数据库
String sql="select * from book_details where book_id = ? ";
ps=con.prepareStatement(sql);//第二步：预编译
ps.setInt(1, id);
//第四步执行sql
rs=ps.executeQuery();
while(rs.next()){
BookDetails books=new BookDetails();
books.setBookId(rs.getInt("book_id"));
books.setTitle(rs.getString("title"));
books.setAuthor(rs.getString("author"));
books.setPublisher(rs.getString("publisher"));
books.setIsbn(rs.getString("isbn"));
books.setPrice(rs.getInt("price"));
books.setPic(rs.getString("pic"));
books.setCategoryName("category_name");
return books;
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
//关闭资源，避免出现异常
BaseDao.close(con, ps, rs);
}
return null;
}
//根据书的类型查找书本
@Override
public List<BookDetails> getBooks(String category) {
Connection con=null;
PreparedStatement ps=null;
ResultSet rs=null;
try {
con=BaseDao.getCon();//第一步连接数据库
String sql="select * from book_details where category_name = ? ";
ps=con.prepareStatement(sql);//第二步：预编译
ps.setString(1, category);
//第四步执行sql
rs=ps.executeQuery();
List<BookDetails> list=new ArrayList<BookDetails>();
while(rs.next()){
BookDetails books=new BookDetails();
books.setBookId(rs.getInt("book_id"));
books.setTitle(rs.getString("title"));
books.setAuthor(rs.getString("author"));
books.setPublisher(rs.getString("publisher"));
books.setIsbn(rs.getString("isbn"));
books.setPrice(rs.getInt("price"));
books.setPic(rs.getString("pic"));
books.setCategoryName("category_name");
list.add(books);
}
return list;
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
//关闭资源，避免出现异常
BaseDao.close(con, ps, rs);
}
return null;
}
@Override
public List<BookDetails> queryAll() {
Connection con=null;
PreparedStatement ps=null;
ResultSet rs=null;
try {
con=BaseDao.getCon();//第一步连接数据库
String sql="select * from book_details";
ps=con.prepareStatement(sql);//第二步：预编译
//第四步执行sql
rs=ps.executeQuery();
List<BookDetails> list=new ArrayList<BookDetails>();
while(rs.next()){
BookDetails books=new BookDetails();
books.setBookId(rs.getInt("book_id"));
books.setTitle(rs.getString("title"));
books.setAuthor(rs.getString("author"));
books.setPublisher(rs.getString("publisher"));
books.setIsbn(rs.getString("isbn"));
books.setPrice(rs.getInt("price"));
books.setPic(rs.getString("pic"));
books.setCategoryName("category_name");
list.add(books);
}
return list;
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
//关闭资源，避免出现异常
BaseDao.close(con, ps, rs);
}
return null;
}
}
UserDao:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package dao;
import java.util.List;
import pack.UserProfile;
/**
*
* @author sl
*/
public interface UserDao {
//用户登陆方法声明/回调声明 查询的方法都是返回的对象 返回查询的对象 或者是list对象或者是VO类对象
public UserProfile login(UserProfile user);
//用户注册方法声明/回调声明 //增加更新删除的方法 插入的方法都是返回一个布尔值 成功或者失败
public boolean register(UserProfile user);
//查询用户的信息
public List<UserProfile>selectUser(String sql,Object[]arr);
}
UserDaoImpl:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
import pack.UserProfile;
import util.BaseDao;
/**
*
* @author sl
*/
public class UserDaoImpl implements UserDao{
//数据库的连接都要try catch 不同的是 查询的方法要在数据层DAO层写 增删改则可以借助工具类中 封装好的try catch
//回调方法 登陆
@Override
public UserProfile login(UserProfile user) {//传入一个有用户名和密码的对象 如果查询到了 就返回 没有对象为null
Connection connection=null;//数据库连接类
PreparedStatement ps=null;//执行sql语句
ResultSet rs=null;//返回的结果
try {
//1.获取数据库连接
connection=BaseDao.getCon();
//2.书写sql语句
String sql="SELECT * FROM user_profile WHERE username=? AND password=?";
//3.预编译
ps=connection.prepareStatement(sql);
//4.设置查询条件
ps.setString(1, user.getUsername());
ps.setString(2, user.getPassword());
//5.执行sql语句 返回结果集
rs=ps.executeQuery();
UserProfile users=null;
if(rs.next()){
//数据库返回的数据与vo类进行交互
users=new UserProfile();
users.setUsername(rs.getString("username"));
users.setPassword(rs.getString("password"));
users.setPhone(rs.getInt("phone"));
//....还有一些值
return users;
}else{
return null;
}
} catch (Exception e) {
e.printStackTrace();
}finally{
//关闭资源 避免出现异常
BaseDao.close(connection, ps, rs);
}
return null;
}
//回调方法 注册
@Override
public boolean register(UserProfile user) {
String sql = "INSERT INTO user_profile(username, password, firstname, middlename, lastname, address1, address2, city, state, pincode, email, phone) "
+ "VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
List<Object> list=new ArrayList<Object>();
list.add(user.getUsername());
list.add(user.getPassword());
list.add(user.getFirstname());
list.add(user.getMiddlename());
list.add(user.getLastname());
list.add(user.getAddress1());
list.add(user.getAddress2());
list.add(user.getCity());
list.add(user.getState());
list.add(user.getPincode());
list.add(user.getEmail());
list.add(user.getPhone());
boolean flag=BaseDao.addUpdateDelete(sql,list.toArray());
if(flag){
return true;
}else{
return false;
}
}
@Override
public List<UserProfile> selectUser(String sql, Object[] arr) {
//这个是还要在业务层调用的 上面两个方法直接可以进行数据层和JSP的交互 由于我们这里不需要根据名字什么的来查询对象
//所以这里就不写了
return null;
}
}
业务层service包下的Book类代码:
BookService：
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package service;
import java.util.List;
import pack.BookDetails;
/**
*
* @author sl
*/
public interface BookService {
/***
15 * 图书信息查询的方法
16 * @return
17 */
public List<BookDetails> select(BookDetails book);
public List<BookDetails> getBooks(BookDetails book);
/***
21 * 根据id进行查询
22 * @param id
23 * @return
24 */
public BookDetails getBook(BookDetails book);
public List<BookDetails> queryAll();
}
BookServiceImpl:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package service;
import dao.BookDao;
import dao.BookDaoImpl;
import java.util.ArrayList;
import java.util.List;
import pack.BookDetails;
/**
*
* @author sl
*/
public class BookServiceImpl implements BookService{
private BookDao dao=new BookDaoImpl();
public List<BookDetails> select(BookDetails book){
//String sql="select * from book ";
StringBuilder sql=new StringBuilder("select * from book_details where 1=1 ");
//sql语句
List<Object> list=new ArrayList<Object>();
if(book!=null){
if( book.getBookId()!=0){
sql.append(" and book_id=? ");
list.add(book.getBookId());
}
/*list.add(book.getBookname());
32 list.add(book.getPrice());
33 list.add(book.getAuthor());
34 list.add(book.getPic());
35 list.add(book.getPublish());*/
}
return dao.select(sql.toString(), list.toArray());
}
@Override
public BookDetails getBook(BookDetails book) {
if(book!=null && book.getBookId()!=0){
return dao.getBook(book.getBookId());
}
return null;
}
@Override
public List<BookDetails> getBooks(BookDetails book) {
if(book!=null && !book.getCategoryName().equals("")){
return dao.getBooks(book.getCategoryName());
}
else{
return null;
}
}
@Override
public List<BookDetails> queryAll() {
return dao.queryAll();
}
}
然后把上述准备工作做完以后，我们根据JSP页面上的步骤流程 一步步调用代码:
首先是引导页，
index.html：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<title>New Tech在线购物商店</title>
//导入样式以及JS组件库
<link href="http://g.alicdn.com/sj/dpl/1.5.1/css/sui.min.css" rel="stylesheet">
<link href="http://g.alicdn.com/sj/dpl/1.5.1/css/sui-append.css" rel="stylesheet">
<script type="text/javascript" src="http://g.alicdn.com/sj/lib/jquery/dist/jquery.min.js"></script>
<script type="text/javascript" src="http://g.alicdn.com/sj/dpl/1.5.1/js/sui.min.js"></script>
<style type="text/css">
body{background:url(3.jpg)}
</style>
</head>
<body>
<br/>
<br/>
<br/>
<div align="center" data-step="1" data-intro="欢迎大家来到New Tech在线购物商店" class="divcont">
<marquee width="400" scrollamount=7> <FONT face=楷体_GB2312 color="blue" size=5>欢迎来到New Tech在线购物商店</font></marquee>
</div>
<br/>
<br />
<br />
<br />
<br />
<div align="center">
<div data-step="2" data-intro="请先完成你的注册" data-position="right" class="divcont">
<a href="register.html" class="sui-btn btn-xlarge btn-danger">注册</a>
</div>
<div data-step="3" data-intro="注册完成后 我们就可以开始shopping啦" data-position="left" class="divcont">
<a href="login.html" class="sui-btn btn-xlarge btn-danger">登陆</a>
</div>
</div>
<a href="javascript:void(0);" class="sui-btn btn-xlarge btn-primary">展示操作</a>
<script>
$.introJs().start();//这里是JS组件库里 新手引导的JS函数
</script>
</body>
</html>
然后我们点击注册，跳转到register.html：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<title>注册</title>
<link href="http://g.alicdn.com/sj/dpl/1.5.1/css/sui.min.css" rel="stylesheet">
<link href="http://g.alicdn.com/sj/dpl/1.5.1/css/sui-append.css" rel="stylesheet">
<script type="text/javascript" src="http://g.alicdn.com/sj/lib/jquery/dist/jquery.min.js"></script>
<script type="text/javascript" src="http://g.alicdn.com/sj/dpl/1.5.1/js/sui.min.js"></script>
<script type="text/javascript">
//刷新验证码
// function HandlerClick(){
// alert('登陆成功');
// }
</script>
<style type="text/css">
body{background:url(3.jpg)}
</style>
</head>
<body>
<div class="sui-container" >
<ul class="sui-breadcrumb">
<li><a href="index1.html">引导页</a></li>
<li class="active">注册</li>
</ul>
<form class="sui-form form-horizontal sui-validate" method="post" action="http://localhost:8080/NewTech/registerBean">
<div class="control-group">
<label class="sui-label label-info">用户名：</label>
<div class="controls">
<input class="input-medium" type='text' name="username" data-rules="required|minlength=2|maxlength=50" />
</div>
</div>
<div class="control-group">
<label class="sui-label label-info">密码：</label>
<input class="input-medium" type="password" name="password" data-rules='required'>
</div>
<div class="control-group">
<label class="sui-label label-info">first Name：</label>
<input class="input-medium" type="text" name="firstname" data-rules='required'>
</div>
<div class="control-group">
<label class="sui-label label-info">middle Name：</label>
<input class="input-medium" type="text" name="middlename" data-rules='required'>
</div>
<div class="control-group">
<label class="sui-label label-info">last Name：</label>
<input class="input-medium" type="text" name="lastname" data-rules='required'>
</div>
<div class="control-group">
<label class="sui-label label-info">地址1：</label>
<input class="input-medium" type="text" name="address1" data-rules='required'>
</div>
<div class="control-group">
<label class="sui-label label-info">地址2：</label>
<input class="input-medium" type="text" name="address2" data-rules='required'>
</div>
<div class="control-group">
<label class="sui-label label-info">城市：</label>
<input class="input-medium" type="text" name="city" data-rules='required'>
</div>
<div class="control-group">
<label class="sui-label label-info">国家：</label>
<input class="input-medium" type="text" name="state" data-rules='required'>
</div>
<div class="control-group">
<label class="sui-label label-info">身份证号码：</label>
<input class="input-medium" type="text" name="pincode" data-rules='required'>
</div>
<div class="control-group">
<label class="sui-label label-info">邮箱：</label>
<input class="input-medium" type="text" name="email" data-rules='required'>
</div>
<div class="control-group">
<label class="sui-label label-info"> 电话：</label>
<input class="input-medium" type="text" name="phone" data-rules='required'>
</div>
<div class="control-group">
<div class="controls">
<input type="submit" class="sui-btn btn-xlarge btn-danger" value="注册">
</div>
</div>
</form>
</div>
</body>
</html>
使用registerBean处理注册的逻辑:
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package pack;
import dao.UserDao;
import dao.UserDaoImpl;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.RequestDispatcher;
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 javax.servlet.http.HttpSession;
import pack.UserProfile;
/**
*
* @author sl
*/
public class registerBean extends HttpServlet {
String username;
String password;
String firstname;
String middlename;
String lastname;
String address1;
String address2;
String city;
String state;
String pincode;
String email;
int phone;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
super.doGet(request, response);
}
/**
*
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//405错误这里 不要加super
response.setContentType("text/html;charset=UTF-8");
//获取register的JSP页面提交的数据
username= request.getParameter("username");
password=request.getParameter("password");
firstname=request.getParameter("firstname");
middlename=request.getParameter("middlename");
lastname=request.getParameter("lastname");
address1=request.getParameter("address1");
address2=request.getParameter("address2");
city=request.getParameter("city");
state=request.getParameter("state");
pincode=request.getParameter("pincode");
email=request.getParameter("email");
try {
phone=Integer.parseInt(request.getParameter("phone"));//这个int类型的需要加try catch
} catch (NumberFormatException e) {
e.printStackTrace();
}
UserProfile user=new UserProfile();
//将数据与VO类进行交互
user.setUsername(username);
user.setPassword(password);
user.setFirstname(firstname);
user.setMiddlename(middlename);
user.setLastname(lastname);
user.setAddress1(address1);
user.setAddress2(address2);
user.setCity(city);
user.setState(state);
user.setPincode(pincode);
user.setEmail(email);
user.setPhone(phone);
//与数据层进行交互
UserDao dao=new UserDaoImpl();
boolean flag=dao.register(user);
if(flag){
response.sendRedirect("registersuccess.html");
}else{
response.sendRedirect("register.jsp");
}
}
}
回到引导页，点击登陆，进入login.html：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<title>登陆</title>
<link href="http://g.alicdn.com/sj/dpl/1.5.1/css/sui.min.css" rel="stylesheet">
<script type="text/javascript" src="http://g.alicdn.com/sj/lib/jquery/dist/jquery.min.js"></script>
<script type="text/javascript" src="http://g.alicdn.com/sj/dpl/1.5.1/js/sui.min.js"></script>
<script type="text/javascript">
//刷新验证码
// function HandlerClick(){
// alert('登陆成功');
// }
</script>
<style type="text/css">
body{background:url(3.jpg)}
</style>
</head>
<body>
<div class="sui-container">
<ul class="sui-breadcrumb">
<li><a href="index1.html">引导页</a></li>
<li class="active">登陆</li>
</ul>
<form class="sui-form form-horizontal sui-validate" method="get" action="http://localhost:8080/NewTech/loginBean">
<div class="control-group">
<label class="sui-label label-info">用户名：</label>
<div class="controls">
<input class="input-medium" type="text" data-rules="required|minlength=2|maxlength=50" name="username" >
</div>
</div>
<div class="control-group">
<label class="sui-label label-info">密码：</label>
<input class="input-medium" type="text" data-rules='required' name="password" >
</div>
<div class="control-group">
<div class="controls">
<!-- <input type="button" class="sui-btn btn-primary btn-xlarge" value="登陆" onClick='HandlerClick()'>-->
<input type="submit" class="sui-btn btn-xlarge btn-danger" value="登陆">
</div>
</div>
</form>
</div>
</body>
</html>
使用loginBean处理登陆的逻辑：
package pack;
import dao.UserDao;
import dao.UserDaoImpl;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import pack.UserProfile;
/**
*
* @author sl
*/
public class loginBean extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
// int userId = Integer.parseInt(request.getParameter("username"));
String userId = request.getParameter("username");
String password=request.getParameter("password");
UserProfile user=new UserProfile();
user.setUsername(userId);
user.setPassword(password);
//与VO层进行交互
UserDao dao=new UserDaoImpl();
UserProfile userBack=dao.login(user);
if(userBack!=null){
HttpSession session=request.getSession();
session.setAttribute("username",userBack.getUsername());
response.sendRedirect("selectcategory.jsp");
}else if(userBack==null){
response.sendRedirect("faillogin.html");
}
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
super.doPost(req, resp); //To change body of generated methods, choose Tools | Templates.
}
}
登陆成功以后进入图书列表页面selectcategory.jsp，我们可以通过表单刷新Book_Details类的category字段属性，再根据这个字段来查询刷新图书列表在book.jsp中显示:
selectcategory.jsp:
<%--
Document : selectcategory
Created on : 2018-5-29, 14:22:37
Author : sl
--%>
<%@page import="service.BookServiceImpl"%>
<%@page import="java.util.List"%>
<%@page import="pack.BookDetails"%>
<%@page import="java.sql.*"%>
<%@ page language="java" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>购物页面</title>
<style>
td{border:1px solid green;}
</style>
<link href="http://g.alicdn.com/sj/dpl/1.5.1/css/sui.min.css" rel="stylesheet">
<script type="text/javascript" src="http://g.alicdn.com/sj/lib/jquery/dist/jquery.min.js"></script>
<script type="text/javascript" src="http://g.alicdn.com/sj/dpl/1.5.1/js/sui.min.js"></script>
<style type="text/css">
body{background:url(33_4.jpg)}
</style>
</head>
<body>
<!--创建数据表 create table `goods` (id int not null auto_increment primary key,goods_name varchar(20), goodspic varchar(30),goods_pri varchar(20), goods_name_en varchar(20)); -->
<label class="sui-btn btn-primary btn-xlarge">欢迎用户</label>
<label class="sui-btn btn-primary btn-xlarge">
<%=
session.getAttribute("username")
%>
<%
if(session.getAttribute("username")==null){
response.sendRedirect("login.html");
}
%>
</label>
<br />
<label class="sui-btn btn-primary btn-xlarge">请选择书本的类别:</label>
<form class="sui-form form-horizontal sui-validate" name="form1" method="post" action="http://localhost:8080/NewTech/book.jsp">
<!-- <select name="category_name">
<option value="English">英国文学</option>
<option value="China">中国文学</option>
<option value="UMA">美国文学</option>
</select>-->
<div class="input-control">
<input type="text" name="category_name" class="input-thin" data-rules='required'><i class="sui-icon icon-touch-magnifier"></i>
</div>
<!--<input class="input-medium" type="text" name="category_name" >-->
<label >
<input class="sui-btn btn-xlarge btn-danger" type="submit" name="Submit" value="提交" />
</label>
<!-- <a href="/servletProject/listItem">查看购物车</a></p>-->
</form>
<%
BookServiceImpl service=new BookServiceImpl();
List<BookDetails>list=service.queryAll();
%>
<div style="text-align:center;width:700px;align-content: center">
<table class="sui-table table-primary" align="center" width="40%" border="1px" >
<tr>
<th>书本封面</th>
<th>书名</th>
<!-- <th>作者</th>
<th>出版社</th>
<th>编号</th>
<th>价格</th>-->
</tr>
<%
for(BookDetails b:list){
%>
<tr align="center">
<td><img src="<%=b.getPic() %>" width="300px"></td>
<td><a href="dobook.jsp?id=<%=b.getBookId()%>" class="sui-btn btn-xlarge btn-danger"><%=b.getTitle()%></a></td>
<!-- <td><%=b.getAuthor()%></td>
<td><%=b.getPublisher()%></td>
<td><%=b.getIsbn() %></td>
<td><%=b.getPrice() %></td>-->
</tr>
<%} %>
</table>
</div>
</body>
</html>
book.jsp:
<%@page import="java.util.List"%>
<%@page import="service.BookServiceImpl"%>
<%@page import="pack.BookDetails"%>
<%@ 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>图书列表的页面</title>
<link href="http://g.alicdn.com/sj/dpl/1.5.1/css/sui.min.css" rel="stylesheet">
<script type="text/javascript" src="http://g.alicdn.com/sj/lib/jquery/dist/jquery.min.js"></script>
<script type="text/javascript" src="http://g.alicdn.com/sj/dpl/1.5.1/js/sui.min.js"></script>
<style type="text/css">
body{background:url(33_4.jpg)}
</style>
</head>
<body>
<%
String categoryString=request.getParameter("category_name");
//图书的实体类创建一个对象
BookDetails book=new BookDetails();
//图书的业务逻辑层层
BookServiceImpl service=new BookServiceImpl();
book.setCategoryName(categoryString);
List<BookDetails> list=service.getBooks(book);
%>
<!-- <label class="sui-btn btn-primary btn-xlarge">我的购物车</label>-->
<div>
<a href="docart.jsp" class="sui-btn btn-xlarge btn-danger">我的购物车</a>
</div>
<div style="text-align:center;width:700px;align-content: center">
<table class="sui-table table-primary" align="center" width="40%" border="1px" >
<tr>
<th>书本封面</th>
<th>书名</th>
<!-- <th>作者</th>
<th>出版社</th>
<th>编号</th>
<th>价格</th>-->
</tr>
<%
for(BookDetails b:list){
%>
<tr align="center">
<td><img src="<%=b.getPic() %>" width="300px"></td>
<td><a href="dobook.jsp?id=<%=b.getBookId()%>" class="sui-btn btn-xlarge btn-danger"><%=b.getTitle()%></a></td>
<!-- <td><%=b.getAuthor()%></td>
<td><%=b.getPublisher()%></td>
<td><%=b.getIsbn() %></td>
<td><%=b.getPrice() %></td>-->
</tr>
<%} %>
</table>
</div>
</body>
</html>
然后根据我们在book.jsp中点击的响应书本的链接 将其id传入给dobook.jsp，我们根据这个书本的id，调用数据层业务层的代码，查询出书本的全部信息，在detail.jsp页面显示出来：
dobook.jsp:
<%--
Document : dobook
Created on : 2018-5-30, 8:48:08
Author : sl
--%>
<%@page import="service.BookServiceImpl"%>
<%@page import="service.BookService"%>
<%@page import="pack.BookDetails"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<%
BookDetails book=new BookDetails();
String sid=request.getParameter("id");
Integer id=Integer.parseInt(sid);
BookService service=new BookServiceImpl();
book.setBookId(id);
BookDetails books=service.getBook(book);
session.setAttribute("book", books);
response.sendRedirect("detail.jsp");
%>
</body>
</html>
detail.jsp:
<%@page import="pack.BookDetails"%>
<%@ 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>图书详细信息的页面</title>
<link href="http://g.alicdn.com/sj/dpl/1.5.1/css/sui.min.css" rel="stylesheet">
<script type="text/javascript" src="http://g.alicdn.com/sj/lib/jquery/dist/jquery.min.js"></script>
<script type="text/javascript" src="http://g.alicdn.com/sj/dpl/1.5.1/js/sui.min.js"></script>
<style type="text/css">
body{background:url(33_4.jpg)}
</style>
</head>
<body>
<%
BookDetails book=(BookDetails)session.getAttribute("book");
%>
<div style="text-align:left;font-size:36px;">
<a href="docart.jsp" class="sui-btn btn-xlarge btn-danger">我的购物车</a>
</div>
<div style="text-align:center;width:1000px;align-content: center">
<table class="sui-table table-primary" align="center" width="40%" border="1px" >
<tr >
<th>图书封面</th>
<th>图书名称</th>
<th>图书作者</th>
<th>图书出版社</th>
<th>图书编号</th>
<th>图书价格</th>
</tr>
<tr>
<td><img src="<%=book.getPic() %>" width="300px"></td>
<td><%=book.getTitle()%></td>
<td><%=book.getAuthor() %></td>
<td><%=book.getPublisher() %></td>
<!--32 <td><img src="images/book.getPic()"</td>-->
<td><%=book.getIsbn()%></td>
<td><%=book.getPrice() %></td>
</tr>
<tr>
<td colspan="2"></td>
<td><a href="cart.jsp" class="sui-btn btn-xlarge btn-danger">添加到购物车</a></td>
<td><a href="selectcategory.jsp" class="sui-btn btn-xlarge btn-danger">图书列表</a></td>
<td colspan="2"></td>
</tr>
</table>
</div>
</body>
</html>
然后我们如果点击了添加到购物车，那么就有了购物结算的逻辑，我们准备好购物车的模型代码cart.jsp以及购物车添加书本以及计算书本总价的docart.jsp:
cart.jsp:
<%@page import="java.util.HashMap"%>
<%@page import="pack.CartItem"%>
<%@page import="java.util.Map"%>
<%@page import="pack.BookDetails"%>
<%@ 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>添加到购物车</title>
</head>
<body>
<%
//购物车功能
//1:首先考虑我购买的是哪一本书籍，这里可以使用id确认也可以使用session中取出哪一本书籍
BookDetails book=(BookDetails)session.getAttribute("book");
//2:考虑如何把书籍放到购物车中
//2.1:首先考虑是否有购物车，如果没有，则创建，如果有直接使用
//2.2:其次先将购物车从session中拿出来，不存在就创建。
Map<Integer,CartItem> cart=(Map<Integer,CartItem>)session.getAttribute("cart");
//如果没有购物车，那么创建，只有第一次访问才会操作
if(cart==null){
//new一个购物车
cart=new HashMap<>();
}
//3:考虑如何把书籍放到购物车中
//3.1:第一考虑购物车中是否有该书籍，所以先从购物车中获取该书籍，如果为空，那么没有该书籍
CartItem item=(CartItem)cart.get(book.getBookId());
if(item==null){
//如果购物车中不存在该书籍，那么创建，且数量默认为1
item=new CartItem();
//将书籍放到购物车中
item.setBook(book);
//将书籍的默认数量为1
item.setNumber(1);
}else{
//如果购物车中以及有该书籍，那么数量加1
item.setNumber(item.getNumber()+1);
}
//4:考虑如何把购物车项(即挑选的书籍是哪一个和书本的数量)放到购物车中
cart.put(book.getBookId(),item);
//5:将购物车放到session中，方便后面取出来
session.setAttribute("cart", cart);
response.sendRedirect("docart.jsp");
%>
</body>
</html>
docart.jsp:
<%@page import="pack.CartItem"%>
<%@page import="java.util.Map"%>
<%@ 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>我的购物车的页面</title>
<link href="http://g.alicdn.com/sj/dpl/1.5.1/css/sui.min.css" rel="stylesheet">
<script type="text/javascript" src="http://g.alicdn.com/sj/lib/jquery/dist/jquery.min.js"></script>
<script type="text/javascript" src="http://g.alicdn.com/sj/dpl/1.5.1/js/sui.min.js"></script>
<style type="text/css">
body{background:url(33_4.jpg)}
</style>
</head>
<body>
<div style="text-align:center;width: 500px;align-content:center">
<table class="sui-table table-primary" align="center" width="40%" border="1px" align="center" >
<thead>
<tr>
<th>书本编号</th>
<th>书本名称</th>
<th>书本单价</th>
<th>书本数量</th>
<th>书本小计</th>
</tr>
</thead>
<%
//1:将添加到购物车里面的物品显示出来
Map<Integer,CartItem> map=(Map<Integer,CartItem>)session.getAttribute("cart");
//2:将购物车里面的内容遍历出来
double count=0;//显示出总价格
if(map!=null){
for(Map.Entry<Integer,CartItem> entry : map.entrySet()){
//计算出每一样的书籍一共花了多少钱
double price=entry.getValue().getBook().getPrice() * entry.getValue().getNumber();
//计算出一共花了多少钱
count=count+price;
%>
<tbody>
<tr align="center">
<td><%=entry.getKey() %></td>
<td><%=entry.getValue().getBook().getTitle()%></td>
<td><%=entry.getValue().getBook().getPrice() %></td>
<td><%=entry.getValue().getNumber() %></td>
<td><%=entry.getValue().getBook().getPrice() * entry.getValue().getNumber()%></td>
</tr>
<%}
}else{
response.sendRedirect("failcart.html");
}
%>
<tr>
<td colspan="4" align="right" class="sui-btn btn-xlarge btn-primary">价格总计</td>
<td class="sui-btn btn-xlarge btn-info"><%=count %></td>
</tr>
</tbody>
</table>
</div>
<div style="text-align:center;font-size:36px;">
<a href="selectcategory.jsp" class="sui-btn btn-xlarge btn-danger">返回图书列表</a>
<a href="payment.html" class="sui-btn btn-xlarge btn-danger">结算</a>
</div>
</body>
</html>
然后我们点击结算，跳转到payment.html：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<title>新建待办事项</title>
<link href="http://g.alicdn.com/sj/dpl/1.5.1/css/sui.min.css" rel="stylesheet">
<script type="text/javascript" src="http://g.alicdn.com/sj/lib/jquery/dist/jquery.min.js"></script>
<script type="text/javascript" src="http://g.alicdn.com/sj/dpl/1.5.1/js/sui.min.js"></script>
<script type="text/javascript">
//刷新验证码
// function HandlerClick(){
// alert('登陆成功');
// }
</script>
<style type="text/css">
body{background:url(33_4.jpg)}
</style>
</head>
<body>
<form class="sui-form form-horizontal sui-validate" method="get" action="http://localhost:8080/NewTech/paymentInfoServlet">
<div class="control-group">
<label class="sui-label label-info">请输入你的信用卡号：</label>
<div class="controls">
<input class="input-medium" type="text" data-rules="required|minlength=2|maxlength=50" name="creditcard_num" >
</div>
</div>
<div class="control-group">
<label class="sui-label label-info">请输入你的信用卡类型：</label>
<input class="input-medium" type="text" data-rules='required' name="creditcard_type" >
</div>
<div class="control-group">
<div class="controls">
<!-- <input type="button" class="sui-btn btn-primary btn-xlarge" value="登陆" onClick='HandlerClick()'>-->
<input type="submit" class="sui-btn btn-xlarge btn-danger" value="登陆">
</div>
</div>
</form>
</body>
</html>
我们通过paymentInfoServlet来进行信用卡的验证，通过vo类与数据库交互:
package pack;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import pack.Payment;
public class paymentInfoServlet extends HttpServlet {
Connection conn;
PrintWriter out;
ResultSet rs;
Boolean isUserBoolean;
@Override
public void init() throws ServletException {
super.init(); //To change body of generated methods, choose Tools | Templates.
conn=null;
out=null;
rs=null;
isUserBoolean=Boolean.FALSE;
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
out=response.getWriter();
// int userId = Integer.parseInt(request.getParameter("username"));
int num = Integer.parseInt(request.getParameter("creditcard_num"));
int type=Integer.parseInt(request.getParameter("creditcard_type"));
try{
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn=DriverManager.getConnection("jdbc:mysql://localhost/mydb","****","*******");//数据库用户名密码略
List<Payment> all=new ArrayList<Payment>();
all=findAll();
out.println(num);
out.println(type);
for(int i = 0 ; i < all.size() ; i++) {//我们只需要知道 有没有这个用户名和密码的用户存在 改变boolean值 而不需要知道所有的匹配方式
// if(userId==all.get(i).getUserId()&&password.equals(all.get(i).getUserPassword()))
// out.println(all.get(i).getUserPassword());
out.println(all.get(i).getCreditcardNum());
out.println(all.get(i).getCreditcardType());
if(num==all.get(i).getCreditcardNum()&&type==all.get(i).getCreditcardType())
{
isUserBoolean=true;
// out.println("登陆成功");
}
// else{
// out.println("登陆失败");
// }
}//循环结束就为真
}catch(Exception e){
e.printStackTrace();
}
if(isUserBoolean==Boolean.TRUE){
// out.println("登陆成功");
HttpSession session=request.getSession();
session.setAttribute("creditcard_num",num );
response.sendRedirect("success.html");
}else if(isUserBoolean==Boolean.FALSE){
// out.println("登陆失败");
response.sendRedirect("fail.html");
}
isUserBoolean=Boolean.FALSE;//这里不要忘记重新置空 destroy中置空无用 因为页面没有被销毁
}
@Override
public void destroy() {
super.destroy(); //To change body of generated methods, choose Tools | Templates.
try{
conn.close();
out.close();
rs.close();
}catch(SQLException se){
out.println(se.toString());
}
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
super.doPost(req, resp); //To change body of generated methods, choose Tools | Templates.
}
//查询全部数据 数据查询
public List<Payment> findAll() throws Exception {
PreparedStatement pstmt=null;
String query=null;
List<Payment> all=new ArrayList<Payment>();
query="SELECT creditcard_num,creditcard_type FROM payment";
pstmt=this.conn.prepareStatement(query);
ResultSet rs=pstmt.executeQuery();//对数据库进行查询 有结果返回
while(rs.next()){//逐行读数据 虽然只有一行
Payment vo=new Payment();;
vo.setCreditcardNum(rs.getInt(1));//逐列读出
vo.setCreditcardType(rs.getInt(2));
all.add(vo);//将从数据库返回的数据保存在底层媒介后 往泛型集合中加一个实例化对象
}
return all;
}
}
以上就完成了我们的项目啦~以下github项目地址:Ricardo_L_Song
