图书租赁系统
项目架构
webContent/index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
登录界面
欢迎登录
com.bean下面新建
User.java
package com.bean;
public class User {
private int id;
private String username;
private String password;
public User() {
super();
// TODO Auto-generated constructor stub
}
public User(String username, String password) {
super();
this.username = username;
this.password = password;
}
@Override
public String toString() {
return "User [id="+id+", username=" + username + ", 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;
}
}
Book.java
package com.bean;
public class Book {
private int id;
private String name;
private double price;
private String info;
private String img_url;
private String borrow_date;
private String user;
public Book() {
super();
// TODO Auto-generated constructor stub
}
public Book(int id, String name, double price, String info, String img_url, String borrow_date, String user) {
super();
this.id = id;
this.name = name;
this.price = price;
this.info = info;
this.img_url = img_url;
this.borrow_date = borrow_date;
this.user = user;
}
@Override
public String toString() {
return "Book [id=" + id + ", name=" + name + ", price=" + price + ", info=" + info + ", img_url=" + img_url
+ ", borrow_date=" + borrow_date + ", user=" + user + "]";
}
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 double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public String getInfo() {
return info;
}
public void setInfo(String info) {
this.info = info;
}
public String getImg_url() {
return img_url;
}
public void setImg_url(String img_url) {
this.img_url = img_url;
}
public String getBorrow_date() {
return borrow_date;
}
public void setBorrow_date(String borrow_date) {
this.borrow_date = borrow_date;
}
public String getUser() {
return user;
}
public void setUser(String user) {
this.user = user;
}
}
com.dao下面建
DBConnection.java
package com.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
/*
* JDBC连接数据库
*/
public class DBConnection {
private static Connection conn;
// ?useUnicode=true&characterEncoding=UTF-8 防止中文出现乱码
private static String url = "jdbc:mysql://localhost:3306/17101?useUnicode=true&characterEncoding=UTF-8";
//数据库用户名
private static String username = "root";
//数据库密码
private static String password = "root";
// static代码块，只在类加载的时候执行一次
static {
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(url, username, password);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static Connection getConnection() {
return conn;
}
}
UserDao.java
package com.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.bean.User;
//数据访问层
public class UserDao {
public User findByInfo(User user) {
User user_find = null;
// 得到数据库连接
Connection conn = DBConnection.getConnection();
// 根据用户名和密码查询用户是否存在
String sql = "select * from user where username=? and password=?";
try {
// 预编译sql
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, user.getUsername());
ps.setString(2, user.getPassword());
// 查询得到结果集
ResultSet rs = ps.executeQuery();
// 遍历结果集，获取信息
while (rs.next()) {
String username_find = rs.getString("username");
String password_find = rs.getString("password");
// 将信息赋值给对象user_find
user_find = new User(username_find, password_find);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return user_find;
}
// 根据用户名查询用户信息
public User findByName(String username) {
User user_find = null;
// 获取数据库连接
Connection conn = DBConnection.getConnection();
// sql语句
String sql = "select*from user where username=?";
try {
// 预编译
PreparedStatement ps = conn.prepareStatement(sql);
// 对未定义的用户名传值
ps.setString(1, username);
// 查询结果集
ResultSet rs = ps.executeQuery();
while (rs.next()) {
String username_find = rs.getString("username");
String password_find = rs.getString("password");
user_find = new User(username_find, password_find);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return user_find;
}
//将用户信息添加进数据库
public int add(User user) {
int result=0;
//获取数据库连接
Connection conn=DBConnection.getConnection();
//sql语句
String sql="insert into user(username,password) value(?,?)";
try {
//预编译
PreparedStatement ps=conn.prepareStatement(sql);
ps.setString(1, user.getUsername());
ps.setString(2, user.getPassword());
result=ps.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
}
BookDao.java
package com.dao;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.bean.Book;
import com.sun.glass.ui.Pixels.Format;
public class BookDao {
public List findAll(String username) {
List list = new ArrayList();
// 获取数据库连接
Connection conn = DBConnection.getConnection();
String sql = "select*from book where user=? or user=?";
try {
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, username);
ps.setString(2, "");
// 查询得到结果集
ResultSet rs = ps.executeQuery();
while (rs.next()) {
int id = rs.getInt("id");
String name = rs.getString("name");
double price = rs.getDouble("price");
String info = rs.getString("info");
String img_url = rs.getString("img_url");
String borrow_date = rs.getString("borrow_date");
String user = rs.getString("user");
Book book = new Book(id, name, price, info, img_url, borrow_date, user);
list.add(book);
}
// 测试
for (Book book : list) {
System.out.println("db" + book.toString());
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return list;
}
// 获取最大页数
public int getMaxPage(String username, int num) {
int result = 0;
int PageNum = 0;
// 获取数据库连接
Connection conn = DBConnection.getConnection();
String sql = "select count(*) as count from book where user=? or user=?";
try {
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, username);
ps.setString(2, "");
ResultSet rs = ps.executeQuery();
while (rs.next()) {
result = rs.getInt("count");
}
// 防止算数异常
if (num == 0) {
PageNum = 1;
return PageNum;
}
// 能够整除的情况
if (result % num == 0) {
PageNum = result / num;
} else {
PageNum = result / num + 1;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return PageNum;
}
// 获取分页数据
public List Limit(String username, int page, int num) {
List list = new ArrayList();
// 获取数据库连接
Connection conn = DBConnection.getConnection();
String sql = "select * from book where user=? or user=? limit ?,?";
try {
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, username);
ps.setString(2, "");
ps.setInt(3, (page - 1) * num);// (查询页数-1)*每页记录数
ps.setInt(4, num);
// 得到结果集
ResultSet rs = ps.executeQuery();
while (rs.next()) {
int id = rs.getInt("id");
String name = rs.getString("name");
double price = rs.getDouble("price");
String info = rs.getString("info");
String img_url = rs.getString("img_url");
String borrow_date = rs.getString("borrow_date");
String user = rs.getString("user");
Book book = new Book(id, name, price, info, img_url, borrow_date, user);
list.add(book);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return list;
}
// 根据id修改图书信息为借出
public int updateById(int id, String username) {
int result = 0;
// 获取数据库连接
Connection conn = DBConnection.getConnection();
String sql = "update book set borrow_date=?,user=? where id=?";
try {
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, getDate());
ps.setString(2, username);
ps.setInt(3, id);
result = ps.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
// 获取当前日期
public String getDate() {
String time = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
time = sdf.format(new Date());
return time;
}
// 计算借出天数
public int getDays(String borrow_time, String back_time) {
int days = 0;
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
Date date_borrow = format.parse(borrow_time);
Date Date_back = format.parse(back_time);
// 转换为毫秒
long borrow = date_borrow.getTime();
long back = Date_back.getTime();
// 计算租金
days = (int) ((back - borrow) / 1000 / 60 / 60 / 24);
System.out.println("共借出了" + days + "天");
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return days;
}
// 根据id查找图书信息
public Book findById(int id) {
Book book = null;
// 获取数据库连接
Connection conn = DBConnection.getConnection();
String sql = "select*from book where id=?";
try {
PreparedStatement ps = conn.prepareStatement(sql);
ps.setInt(1, id);
// 查询结果集
ResultSet rs = ps.executeQuery();
while (rs.next()) {
int id_find = rs.getInt("id");
String name = rs.getString("name");
double price = rs.getDouble("price");
String info = rs.getString("info");
String img_url = rs.getString("img_url");
String borrow_date = rs.getString("borrow_date");
String user = rs.getString("user");
book = new Book(id_find, name, price, info, img_url, borrow_date, user);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return book;
}
// 根据id修改图书信息为归还
public int updateByID(int id) {
int result = 0;
// 获取数据库连接
Connection conn = DBConnection.getConnection();
String sql = "update book set borrow_date=?,user=? where id=?";
try {
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, "尚未借出");
ps.setString(2, "");
ps.setInt(3, id);
result = ps.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
}
com.filter下新建过滤器
CharacterEncodingFilter.Java
package com.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
//过滤器
public class CharacterEncodingFilter implements Filter {
public void destroy() {
// TODO Auto-generated method stub
}
public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
System.out.println("过滤器处理字符编码...");
arg0.setCharacterEncoding("utf-8");
arg1.setCharacterEncoding("utf-8");
arg1.setContentType("text/html; charset=UTF-8");
arg2.doFilter(arg0, arg1);
}
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
}
}
com.service下新建
UserService.java
package com.service;
import com.bean.User;
import com.dao.UserDao;
//业务逻辑层
public class UserService {
private UserDao udao = new UserDao();
// 登录验证
public boolean login(User user) {
User user_find = udao.findByInfo(user);
if (user_find != null) {
return true;
}
return false;
}
//注册
public void regist(User user) {
udao.add(user);
}
public boolean registcheck(String username) {
if(udao.findByName(username)==null) {
//可以注册
return true;
}
return false;
}
}
BookService.java
package com.service;
import java.util.ArrayList;
import java.util.List;
import com.bean.Book;
import com.dao.BookDao;
//业务逻辑层
public class BookService {
private BookDao bdao = new BookDao();
public List listbook(String username) {
List list = new ArrayList();
list = bdao.findAll(username);
return list;
}
// 分页得到共多少页
public int getMaxPage(String username, int num) {
return bdao.getMaxPage(username, num);
}
// 分页数据
public List Limit(String username, int page, int num) {
List list = new ArrayList();
list = bdao.Limit(username, page, num);
return list;
}
// 借出图书
public int borrow_book(int id, String username) {
int result = 0;
result = bdao.updateById(id, username);
return result;
}
// 借出天数
public int getDays(String borrow_time, String back_time) {
int days = 0;
days = bdao.getDays(borrow_time, back_time);
return days;
}
// 计算租金
public double money(int days, double price) {
double pay = 0;
pay = price * days;
return pay;
}
// 获取当前日期的字符串
public String getDate() {
return bdao.getDate();
}
// 根据id得到图书信息
public Book findById(int id) {
Book book = null;
book = bdao.findById(id);
return book;
}
//归还图书
public int back_book(int id) {
int result=0;
result=bdao.updateByID(id);
return result;
}
}
新建com.servlet
package com.servlet;
import java.io.IOException;
import java.util.List;
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 javax.servlet.http.HttpSession;
import com.bean.Book;
import com.service.BookService;
/**
* Servlet implementation class ListBookServlet
*/
@WebServlet("/listbook.do")
public class ListBookServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private BookService bservice=new BookService();
/**
* @see HttpServlet#HttpServlet()
*/
public ListBookServlet() {
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
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//得到登录的用户名
HttpSession session=request.getSession();
String username=session.getAttribute("username").toString();
//分页每页记录数
int num=3;
//得到分页的最大页数
int PageNum=bservice.getMaxPage(username, num);
//得到请求的页数
int page=Integer.parseInt(request.getParameter("page"));
//准备数据
List list=bservice.Limit(username, page, num);
request.setAttribute("booklist", list);
request.setAttribute("PageNum", PageNum);
request.setAttribute("page", page);
//转发
request.getRequestDispatcher("WEB-INF/jsp/main.jsp").forward(request, response);
}
}
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
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 com.service.UserService;
/**
* Servlet implementation class CheckUserServlet
*/
@WebServlet("/checkuser.do")
public class CheckUserServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private UserService uservice = new UserService();
/**
* @see HttpServlet#HttpServlet()
*/
public CheckUserServlet() {
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
response.getWriter().append("Served at: ").append(request.getContextPath());
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO Auto-generated method stub
PrintWriter pw = response.getWriter();
String username = request.getParameter("name");
System.out.println("CheckUserServlet" + username);
System.out.println("CheckUserServlet" + uservice.registcheck(username));
// 不能注册 返回已存在
if (!uservice.registcheck(username)) {
pw.write("exists");
pw.flush();
pw.close();
}
}
}
package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
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 javax.servlet.http.HttpSession;
import com.service.BookService;
/**
* Servlet implementation class BorrowBookServlet
*/
@WebServlet("/borrow.do")
public class BorrowBookServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private BookService bservice=new BookService();
/**
* @see HttpServlet#HttpServlet()
*/
public BorrowBookServlet() {
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
response.getWriter().append("Served at: ").append(request.getContextPath());
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
System.out.println("借出图书");
PrintWriter pw=response.getWriter();
//得到登陆的用户名
HttpSession session=request.getSession();
String username=session.getAttribute("username").toString();
int id=Integer.parseInt(request.getParameter("id"));
int page=Integer.parseInt(request.getParameter("page"));
//修改图书信息
bservice.borrow_book(id, username);
//刷新页面
request.getRequestDispatcher("listbook.do?page="+page).forward(request, response);
}
}
package com.servlet;
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;
import javax.servlet.http.HttpSession;
import com.bean.Book;
import com.service.BookService;
/**
* Servlet implementation class BackBookShowServlet
*/
@WebServlet("/backbookshow.do")
public class BackBookShowServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private BookService bservice = new BookService();
/**
* @see HttpServlet#HttpServlet()
*/
public BackBookShowServlet() {
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
response.getWriter().append("Served at: ").append(request.getContextPath());
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
// 得到登录的用户名
HttpSession session = request.getSession();
String username = session.getAttribute("username").toString();
// 得到操作的图书编号
int id = Integer.parseInt(request.getParameter("id"));
// 得到第几页数据
int back_page = Integer.parseInt(request.getParameter("back_page"));
// 根据id得到图书信息
Book book_back = bservice.findById(id);
// 得到书名
String book_name = book_back.getName();
// 得到图书图片地址
String img_url = book_back.getImg_url();
// 得到借出日期
String borrow_date = book_back.getBorrow_date();
// 得到每日租金
double price = book_back.getPrice();
System.out.println("BackBookShowServlet:" + id);
System.out.println("BackBookShowServlet:" + book_name);
System.out.println("BackBookShowServlet:" + borrow_date);
// 准备显示数据
// 归还日期
String back_date = bservice.getDate();
/* 得到借出天数 */
int days = bservice.getDays(borrow_date, back_date);
// 得到租金
double money = bservice.money(days, price);
// 将页数保存进session
session.setAttribute("back_page", back_page);
// 归还图书
bservice.back_book(id);
// 转发到页面显示
request.setAttribute("back_img", img_url);
request.setAttribute("back_name", book_name);
request.setAttribute("back_price", price);
request.setAttribute("back_days", days);
request.setAttribute("back_money", money);
// 转发
request.getRequestDispatcher("WEB-INF/jsp/back_book.jsp").forward(
request, response);
}
}
package com.servlet;
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;
import javax.servlet.http.HttpSession;
import com.bean.User;
import com.service.UserService;
/**
* Servlet implementation class login_servlet
*/
@WebServlet("/login.do")
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
// 调用业务对象
UserService uservice = new UserService();
/**
* @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 {
// TODO Auto-generated method stub
response.getWriter().append("Served at: ").append(request.getContextPath());
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO Auto-generated method stub
String username = request.getParameter("username");
String password = request.getParameter("password");
System.out.println(username);
System.out.println(password);
// 创建对象保存信息
User user = new User(username, password);
// 调用登陆业务，判断是否登陆成功
if (uservice.login(user)) {
// 登陆成功
HttpSession session = request.getSession();
session.setAttribute("username", username);
// 转发到登陆成功界面
request.getRequestDispatcher("listbook.do?page=1").forward(request, response);
} else {
// 登陆失败，则转发到登陆失败界面
request.getRequestDispatcher("WEB-INF/jsp/failed.jsp").forward(request, response);
}
}
}
package com.servlet;
//控制层
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;
import com.bean.User;
import com.service.UserService;
/**
* Servlet implementation class LoginServlet
*/
@WebServlet("/regist.do")
public class RegistServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
// 业务处理对象
UserService uservice = new UserService();
/**
* @see HttpServlet#HttpServlet()
*/
public RegistServlet() {
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
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String username = request.getParameter("username");
String password = request.getParameter("password");
System.out.println("regist"+username);
System.out.println("regist"+password);
// 创建对象保存信息
User user = new User(username, password);
uservice.regist(user);
//注册成功
request.getRequestDispatcher("WEB-INF/jsp/regist_success.jsp").forward(request, response);
}
}
package com.servlet;
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 ToRegistServlet
*/
@WebServlet("/toregist.do")
public class ToRegistServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public ToRegistServlet() {
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
response.getWriter().append("Served at: ").append(request.getContextPath());
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//转发到注册界面
request.getRequestDispatcher("WEB-INF/jsp/regist.jsp").forward(request, response);
}
}
WEB-INF/jsp
back_book.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
back_book
归还图书信息！
书名：${ back_name}
每日租金（元）：${ back_price}
借出天数（天）：${ back_days}
租金（元）：${back_money }
regist.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
用户注册
用户注册
failed.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
Insert title here
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
regist_success.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
Insert title here
注册成功,正在自动跳转...
登录
main.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
main
欢迎您：${sessionScope.username }
切换用户
封面
书名
描述
每日租金（元）
借出日期
操作
${book.name }
${book.info }
${book.price }
${book.borrow_date }
首页
上页
上页
下页
下页
末页
跳转到第 页
${page }/${PageNum}页