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【JSP课程设计】个人信息管理系统(代码保姆级)

开发工具及开发环境

Eclipse EE、Mysql、Navicat for MySQL、Tomcat-9.0.60、windows 10系统

WEB系统注册与登录功能模块需求

1.1 注册功能

  • 注册时需提供以下信息:
  • 用户名 - 长度必须大于等于6位,小于10位- 用户名不能重名- 必选项
  • 登录密码 - 必须至少有1个数字、1个大写字母、1个小写字母和其它字符共同组成- 长度必须大于6位,小于12位- 需要用户输入两次相同的密码才能确认注册- 必选项
  • 邮件地址 - 用户邮件地址,需要校验邮件格式###@####,后台校验- 邮件地址不能重复- 必选项
  • 单位 - 最大长度50位- 可选项- 注册提交后:- 所有信息都合法,则返回显示注册成功字样的页面,内含返回登录界面的链接。- 若有部分信息不合法,则返回显示注册失败字样的页面,内含指明哪条注册信息错误的提醒,同时内含返回重新填写的链接- 注册成功后:系统将自动获得用户的成功注册时间,包括:年月日时分秒

1.2 登录功能

登陆时的过程:

  1. 输入用户名和密码
  2. 提交登陆
  3. 登陆提交后:
  • 若有该用户名,密码不正确,则返回包含登录密码错误字样的页面,内含返回重新登录的链接
  • 若无该用户名,则返回包含“用户名或密码错误”字样的页面,内含返回重新登录的链接
  • 若登陆成功,则返回包含“登录成功”字样的页面,内含返回用户注册信息的链接和退出登录链接

1.3 填写补充信息功能

  • 只有登录用户可以填写补充信息
  • 补充信息包括

(1)真实姓名,必填,只能包含不含空格的2-4个中文字符,或20个字符以内的英文字符

(2)电话号码,选填,11位数字

(3)出生年份与日期,必填,允许输入格式包括1977-12-14,或1977年12月14日。年份最早不能早于1900年,最晚不能晚于填写当天

1.3 查看注册信息功能

  • 只有登录用户才能查看注册信息
  • 登录用户可以查看自己的注册详情和自己的补充信息
  • 查看注册信息包含所有注册的信息和注册日期信息
  • 查看注册信息页面包含退出登录链接

1.4 修改用户信息功能

  • 注册用户信息页面提供链接对自己的注册信息进行修改
  • 可以对密码和邮箱信息进行修改
  • 修改每项信息时提供单独页面
  • 修改密码时要求用户输入旧密码、新密码、新密码确认
  • 修改信息时进行信息正确性校验
  • 如果输入格式错误,修改不成功,则给出错误提示
  • 修改成功则提示修改成功信息

1.5 用户退出

  • 只有成功登录的用户才能退出
  • 退出后不能进行查看注册用户信息功能

1.6 其它功能

  • 所有页面的显著位置显示:项目-项目人-当前日期/时间

如:JSP课设-Evanpatchouli℃-2021-6-17/11:07

  • 所有功能结果页面都要具备可测试性,及结果页面需要有明确标志,表示功能成功与否。

项目流程结构及源码

1.项目文件结构

2.jar包

3.数据库表结构

基本的表结构如图,各属性由实际要求所定

                      (用户名主键的同时,将email设置为唯一索引,保证两者都不重复)

项目编写的流程(参考)

一、根据需求,建立数据库和表

使用navicat的sql可视化界面:

1.建立连接

    如下图所示,点击“连接”,创建主机名localhost,埠3306的连接(连接名不设置,默认为localhost_3306)

用户名和密码自己设置,测试连接成功即可(我的设置为root, root)

2.建立数据库

    如下图所示,右键连接名创建数据库,设置数据库名为usermanager,字符集为UTF8(防止存入中文字符导致乱码)

            ![](https://img-blog.csdnimg.cn/c1dc69229fc84416812ecf7954a29025.png)        ![](https://img-blog.csdnimg.cn/114a0ddc57984b65bb34ea6370495bd0.png)

3.建立表

    如下图,点击“创建表”,并建立所需的字段。该系统用数据库存储用户的用户名、密码、邮箱、单位、注册时间、真名、电话和生日这8条信息,所以创建8个字段:username, userpassword, email, unit, registertime, realname, phone, birth。前四个为必填项,设为非空(not null);要求用户名和邮箱不得重复,因为设置用户名username为主键,邮箱email为唯一索引。

二、编写web应用

1.确定应用流程思路

2.编写代码

StringUtil.java:字符串工具类

定义几个字符串方法,在用户操作进行校验时被调度(严谨校验的使用程度高,推荐这样在外定义一个方法以便被多次调用)。

package utils;

public class StringUtil {
    public static boolean isEmpty(String str) {
        if ("".equals(str) || str == null) {
            return true;
        } else {
            return false;
        }
    }

    public static boolean isNotEmpty(String str) {
        if (!"".equals(str) && str != null) {
            return true;
        } else {
            return false;
        }
    }

    public static String nullString(Object object){
        if(object==null){
            return "";
        }else {
            return object.toString();
        }
    }
}

JdbcUtil.java:数据库工具类

包含两个方法,连接数据库和释放;数据库连接方法getConnection()内定义好数据库链接,用户名和密码以及驱动器,并反回创建好的连接;释放,释放conn, resultSetstatment.

package utils;

import java.sql.*;

public class JdbcUtil {
    //(1)获取connection
    public static Connection getConnection() throws Exception{
        String url="jdbc:mysql://localhost:3306/usermanager";
        String name="root";
        String pwd="root";
        String driver="com.mysql.jdbc.Driver";
        Class.forName(driver);//连接驱动
        Connection conn = DriverManager.getConnection(url,name,pwd);//连接数据库
        return conn;
        
    }
    //(2)释放资源
    public static void release(ResultSet resultSet, Statement statement, Connection connection) {
        if (resultSet != null) {
            try {
                resultSet.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if (statement != null) {
            try {
                statement.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if (connection != null) {
            try {
                connection.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

    }
    
}

User.java:用户类。用户包含总共8条数据,以此设计用户类和相对应的方法即可。

package domain;
import java.util.*;

public class User {
    private String username;
    private String password;
    private String email;
    private String unit;
    private String registertime;
    private String realname;
    private String phone;
    private String birth;
    
    /**
     * @return the username
     */
    public String getUsername() {
        return username;
    }
    /**
     * @param username the username to set
     */
    public void setUsername(String username) {
        this.username = username;
    }
    /**
     * @return the password
     */
    public String getPassword() {
        return password;
    }
    /**
     * @param password the password to set
     */
    public void setPassword(String password) {
        this.password = password;
    }
    /**
     * @return the email
     */
    public String getEmail() {
        return email;
    }
    /**
     * @param email the email to set
     */
    public void setEmail(String email) {
        this.email = email;
    }
    /**
     * @return the unit
     */
    public String getUnit() {
        return unit;
    }
    /**
     * @param unit the unit to set
     */
    public void setUnit(String unit) {
        this.unit = unit;
    }
    /**
     * @return the registertime
     */
    public String getRegistertime() {
        return registertime;
    }
    /**
     * @param registertime the registertime to set
     */
    public void setRegistertime(String registertime) {
        this.registertime = registertime;
    }
    /**
     * @return the realname
     */
    public String getRealname() {
        return realname;
    }
    /**
     * @param realname the realname to set
     */
    public void setRealname(String realname) {
        this.realname = realname;
    }
    /**
     * @return the phone
     */
    public String getPhone() {
        return phone;
    }
    /**
     * @param phone the phone to set
     */
    public void setPhone(String phone) {
        this.phone = phone;
    }
    /**
     * @return the birth
     */
    public String getBirth() {
        return birth;
    }
    /**
     * @param birth the birth to set
     */
    public void setBirth(String birth) {
        this.birth = birth;
    }
    @Override
    public int hashCode() {
        return Objects.hash(birth, email, password, phone, realname, registertime, unit, username);
    }
    @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;
        return Objects.equals(birth, other.birth) && Objects.equals(email, other.email)
                && Objects.equals(password, other.password) && Objects.equals(phone, other.phone)
                && Objects.equals(realname, other.realname) && Objects.equals(registertime, other.registertime)
                && Objects.equals(unit, other.unit) && Objects.equals(username, other.username);
    }
    @Override
    public String toString() {
        return "User [username=" + username + ", password=" + password + ", email=" + email + ", unit=" + unit
                + ", registertime=" + registertime + ", realname=" + realname + ", phone=" + phone + ", birth=" + birth
                + "]";
    }
        
}

UserDao.java:用户Dao接口

该接口类包含了对用户最基本的方法:登录、注册、查找、改密和补充,在UserDaoImpl中实现。

package dao;

import domain.User;

public interface UserDao {
    //登陆
    User login(String username,String password);
    //注册
    User register(User user);
    //查找
    boolean select(String username, String email);
    //修改信息(密码)
    void updateUser(User user);
    //补充信息
    void addxinxi(User user);
    //
    
}

UserDaoImpl.javaUserDao的具体实现类

UserDaoImpl中建立数据库连接,对用户信息进行增删改查,并将操作结果记录到字符串message中,由*back()*函数接收,以便后续测试时使用。

package dao.impl;

import dao.UserDao;
import domain.User;
import utils.JdbcUtil;

import java.sql.*;
/*
 * 用户Dao实现类
 */
public class UserDaoImpl implements UserDao {
    String message;
    public String Back() {
        return message;
    }
    public User login(String username,String password) {
        
        User user=null;
        Connection conn=null;
        Statement stmt = null;
        ResultSet rs = null;
        
        try {
            
            conn = JdbcUtil.getConnection();
            String sql = "select * from user where username = ? and userpassword= ?";
            PreparedStatement prpstmt = null;
            prpstmt = conn.prepareStatement(sql);
            prpstmt.setString(1, username);
            prpstmt.setString(2, password);
            rs = prpstmt.executeQuery();
            if(rs.next()){
                user = new User();
                user.setUsername(rs.getString("username"));
                user.setPassword(rs.getString("userpassword"));
                user.setEmail(rs.getString("email"));
                user.setUnit(rs.getString("unit"));
                user.setRegistertime(rs.getString("registertime"));
                user.setRealname(rs.getString("realname"));
                user.setPhone(rs.getString("phone"));
                user.setBirth(rs.getString("birth"));
                message="登录成功";
                System.out.println(message + user.toString());
            }else {
                message="用户名或者密码错误";
                System.out.println(message);
            }    
       }catch(Exception e) {
           e.printStackTrace();
       }finally {
           JdbcUtil.release(rs, stmt, conn);
       }
        return user;
    }
    
    public User register(User user){

        Connection conn = null;
        PreparedStatement prpstmt = null;
        ResultSet rs = null;
        @SuppressWarnings("unused")
        int result = 0;

        try {
            conn = JdbcUtil.getConnection();
            String sql = "insert into user(username, userpassword, email, unit, registertime) values (?, ?, ?, ?, ?);";
            prpstmt = conn.prepareStatement(sql);
            prpstmt.setString(1, user.getUsername());
            prpstmt.setString(2, user.getPassword());
            prpstmt.setString(3, user.getEmail());
            prpstmt.setString(4, user.getUnit());
            prpstmt.setString(5, user.getRegistertime());
            
            result = prpstmt.executeUpdate();
            

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            JdbcUtil.release(rs, prpstmt, conn);
        }
        System.out.println(result);
        if(result!=0) {
            message="注册成功";
        }else {
            message="注册失败";
        }
        
        return user;
    }
    
    public boolean select(String username, String email) {
        Connection conn = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        String sql_1 = "select count(*) from user where username = ?";
        String sql_2 = "select count(*) from user where email = ?";
        int count = 0;
        try {
            conn = JdbcUtil.getConnection();
            ps = conn.prepareStatement(sql_1);
            ps.setString(1, username);    
            rs = ps.executeQuery();    
            rs.next();
                    
            count = rs.getInt(1);
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            JdbcUtil.release(rs, ps, conn);
        }
        
        try {
            conn = JdbcUtil.getConnection();
            ps = conn.prepareStatement(sql_2);
            ps.setString(1, email);    
            rs = ps.executeQuery();    
            rs.next();
                    
            count += rs.getInt(1);
            if(count > 0){
                return true;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            JdbcUtil.release(rs, ps, conn);
        }
        return false;
    }
    
    
    
    public void updateUser(User user) {
        Connection conn = null;
        PreparedStatement ps = null;
        String sql = "update user set userpassword=? where username=?";
        int rs = 0;
        
        try {
            conn = JdbcUtil.getConnection();
            ps = conn.prepareStatement(sql);
            ps.setString(1, user.getPassword());    
            ps.setString(2, user.getUsername());
            rs=ps.executeUpdate();            
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            JdbcUtil.release(null, ps, conn);
        }
        if(rs!=0) {
            message=user.getPassword();
        }
        System.out.println(rs);
    }

    @Override
    public void addxinxi(User user) {
        Connection conn = null;
        PreparedStatement ps = null;
        String sql = "update user set realname=?, phone=?, birth=? where username=?";
        @SuppressWarnings("unused")
        int rs = 0;
        
        try {
            conn = JdbcUtil.getConnection();
            ps = conn.prepareStatement(sql);
            ps.setString(1, user.getRealname());    
            ps.setString(2, user.getPhone());
            ps.setString(3, user.getBirth());
            ps.setString(4, user.getUsername());
            rs=ps.executeUpdate();
            
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            JdbcUtil.release(null, ps, conn);
        }
        
    }
}

UserService.java:用户服务接口,由UserServiceImpl实现

(UserService->UserServiceImpl->UserDao->UserDaoImpl,直接放进UserDao也可以)

package service;

import domain.User;

public interface UserService {
    // 新增用户时查重
    boolean checkUsername(String username, String email);
    // 修改用户信息
    void saveUser(User user);
    //补充用户信息
    void addInfo(User user);
}

UserServiceImpl:(UserService并入UserDao,则UserServiceImpl并入UseerDaoImpl)

package service.impl;

import java.sql.*;
import java.util.List;

import dao.UserDao;
import dao.impl.UserDaoImpl;
import domain.User;
import service.UserService;
import utils.JdbcUtil;

/**
 * UserService用户服务实现类
 */
@SuppressWarnings("unused")
public class UserServiceImpl implements UserService{
    private UserDao userDao = new UserDaoImpl();

    public boolean checkUsername(String username, String email) {
        return userDao.select(username, email);
    }

    @Override
    public void saveUser(User user) {
        userDao.updateUser(user);
    }

    @Override
    public void addInfo(User user) {
        userDao.addxinxi(user);
        
    }

}

系统要求每个页面都实时显示信息和时间,因此准备一个time.jsp,其余jsp可视页面均采用include指令标**记(*<%@ include file="time.jsp" %>)将time.jsp*嵌入到自身页面中。

time.jsp:创建一个div,设置其iddatetime,在script标记中,定义*showtime()函数在该div元素中动态地显示时间信息,并调用自定义check()函数给单位数加上"0";setInterval(showtime(), 1000)*设置显示时间函数每秒运行(刷新实时时间)。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="java.time.LocalTime" %> <!-- jsp指令标记 -->
<%@ page import="java.time.LocalDate" %> <!-- jsp指令标记 -->
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Show time</title>
</head>
<script>
  function showtime(){
      nowtime=new Date();
      y=nowtime.getFullYear();
      mo=nowtime.getMonth()+1;
      d=nowtime.getDate();
      h=nowtime.getHours();
      mi=nowtime.getMinutes();
      s=nowtime.getSeconds();
      
      mo=checkTime(mo);
      d=checkTime(d);
      mi=checkTime(mi);
      s=checkTime(s);
      document.getElementById("datetime").innerText="JSP课设-Evanpatchouli℃-"+y+"-"+mo+"-"+d+"/"+h+":"+mi+":"+s;
  }
  setInterval("showtime()", 1000);
  function checkTime(i) {   
        if (i<10){
            i="0" + i;
        }   
          return i;
    }
</script>
<body >
<div id="datetime" style="font-size:24px;font-weight:bold;text-align:center; padding-left: 90px;" ></div>
</body>
</html>

各个页面都需要进行登录检测,以防未登录,框架如下:不同页面为迎合自己的功能会有略改。

<% 
    Object obj = session.getAttribute("user");
    User user = (User)obj;
if(null==obj) {
%>    
您尚未登陆,请登录!
<a href="login.jsp" name="login">去登录</a>
<a href="register.jsp" name="register">跳转注册</a>
<%
} else {
%>
<!-- 该页内容 -->
<%}%>

register.jsp:用户注册页,用form表单+servlet提交注册信息。表单action请求RegisterServlet,表单含用户名、密码、邮箱、单位,提供重置*(reset)和注册(submit)按钮,具体格式见下。由于对各个注册信息有长度限制,有三种方法:1.设置好input标记的minlengthmaxlength属性;2.在script中定义一个函数,注册框的onclick属性设置成"return check()",在点击注册时被调度,读取输入框并检查内容的合法性;3.提交给servlet后,在servlet*中检验并返回结果。对于长度这样简单的限制采取第1种方法极为方便,而大小写等复杂的格式校验则需要采用后2种方法。

前2种属于前端校验,第3种属于后端校验,前两者用户体验感更好。项目需求中要求信息违法转到失败页面并显示,原则上第3种最符合要求。

第1种: 第2种:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ include file="time.jsp" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户注册</title>
</head>
<body style="text-align:left;">
<script type="text/javascript">
function check(){
    var flag = 0;//flag为0代表密码没有问题
    
    var Uname=document.getElementById('uname').value;//首先通过文本框的id获取它的值然后进行判断
    if(Uname.length<6){//如果输入信息有误,弹出提示框
        alert("用户名最短长度为6");
        flag = 1;
    }
    
    var Upwd=document.getElementById('upwd').value;
    var regLower = /^.*[a-z]{1,}.*$/;//包含小写字母
    var regUpper = /^.*[A-Z]{1,}.*$/;//包含大写字母
    var regSpecial = /^.*[^a-zA-Z0-9]{1,}.*$/;//包含特殊字符
    var regNum = /^.*[0-9]{1,}.*$/;//包含数字
    //如果密码纯数字、纯小写字母、纯大写字母、纯特殊字符,禁止注册
    if(!regLower.test(Upwd) || !regUpper.test(Upwd) || !regSpecial.test(Upwd) || !regNum.test(Upwd)){
        alert("密码必须至少有1个数字、1个大写字母、1个小写字母和其它字符共同组成!");
        flag = 1;
    }
    if(flag==0)
        return true;
    else
        return false;
}
</script>
    <form action="RegisterServlet" method="post">
        <table align="center">
            <div style="text-align:center;">
                    <h2>用户注册</h2>
            </div>
            <tr>
                <td>用&nbsp;&nbsp;户&nbsp;&nbsp;名:</td>
                <%--<td><input name="username" type="text" size="21" minlength="6" maxlength="9" placeholder="用户名长度6-9位"></td>--%>
                <td><input id="uname" name="username" type="text" size="21" maxlength="9" placeholder="用户名长度6-9位"></td>
            </tr>
            <tr>
                <td align="justify">密&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;码:</td>
                <td><input id="upwd" name="password" type="password" size="21" minlength="7" maxlength="11" placeholder="密码长度7-11位"></td>
            </tr>
             <tr>
                <td align="justify">确认密码:</td>
                <td><input name="ckpassword" type="password" size="21" minlength="7" maxlength="11" placeholder="密码长度7-11位"></td>
            </tr>
            <tr>
                <td align="justify">E&nbsp;&nbsp;-&nbsp;&nbsp;mail:</td>
                <td><input name="email" type="text" size="21" maxlength="21"></td>
            </tr>
            <tr>
                <td align="justify">单&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;位:</td>
                <td><input name="unit" type="text" size="21" maxlength="50" placeholder="填写单位名称"></td>
            </tr>
        </table>
        <table align="center" cellspacing="12">
            <tr>
                <td align="justify"><input type="submit" name="submit" value="注册" onclick="return check();"></td>
                <td align="justify"><input type="reset" name="reset" value="重置"></td>
            </tr>
        </table>
    </form>
<div align="center">
    <a href="login.jsp" name="login">跳转登录</a>
</div>
</body>
</html>

RegisterServlet.java:接受register.jsp提交的表单的注册信息,生成注册时间,同时对其他的不合法行为进行检测,如查重、查空等,检验过程中调用了StringUtil中对字符串的方法(不必要)和UserService中的*checkUsername()*进行查重等操作。

检验合法后,创建一个User对象和UserDao对象,注册User,将用户信息存入数据库内(UserDao实现类中实现)。然后在session中创建一个关键字*"usernamePrepared",将注册好的用户名赋给它,用于后续登录时预置用户名,以增强用户体验(不必要),然后跳转到注册成功的页面;如果不合法,在request中创建一个关键字"message"*,存入错误信息,并跳转到注册失败的页面。

package servlet;

import dao.UserDao;
import dao.impl.UserDaoImpl;
import domain.User;
import service.UserService;
import service.impl.UserServiceImpl;
import utils.StringUtil;

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 java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * RegisterServlet实现类
 */
@WebServlet("/RegisterServlet")
public class RegisterServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    private UserService userService = new UserServiceImpl();
    /**
     * @see HttpServlet#HttpServlet()
     */
    public RegisterServlet() {
        super();
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPut(request, response);
    }

    protected void doPut(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        HttpSession session = request.getSession();
        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=UTF-8");
        Date date = new Date();
        SimpleDateFormat formatter = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");

        String rs = "";
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        String ckpassword = request.getParameter("ckpassword");
        String email = request.getParameter("email");
        String unit = request.getParameter("unit");
        String registertime=formatter.format(date);
        System.out.println(registertime);
        
        if(StringUtil.isEmpty(username)||StringUtil.isEmpty(password)||StringUtil.isEmpty(ckpassword)||StringUtil.isEmpty(email)||StringUtil.isEmpty(unit)) {
            rs = "注册信息填写不完整!";
        }
        // 两次输入密码是否一致
        if (!password.equals(ckpassword)) {
            rs = "两次密码输入不一致!";
        }
        
        boolean IsUserExist = userService.checkUsername(username,email);
        if(IsUserExist==true) {
            rs = "账号已存在!";
        }
        
        if(StringUtil.isEmpty(rs)) {
            User user = new User();
            user.setUsername(username);
            user.setPassword(password);
            user.setEmail(email);
            user.setUnit(unit);
            user.setRegistertime(registertime);

            System.out.println(user.getRegistertime());
            
            UserDao userDao = new UserDaoImpl();
            userDao.register(user);
            System.out.println("注册成功");
            session.setAttribute("usernamePrepared", username);
            request.getRequestDispatcher("register_success.jsp").forward(request,response);
        }else {
            System.out.println("注册失败"+rs);
            request.setAttribute("message", "注册失败!"+rs);
            request.getRequestDispatcher("/register_fail.jsp").forward(request,response);
        }
    }

}

** register_success.jsp**:注册成功页面

显示注册成功信息;包含2个链接,分别跳转到登录页和注册页。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ include file="time.jsp" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>注册成功</title>
</head>
<body style="text-align:center;">
<h1>注册成功!
<br>
    <a href="login.jsp" name="login">跳转登录</a>
    <a href="register.jsp" name="register">继续注册</a>
</h1>
</body>
</html>

register_fail.jsp:注册失败页

显示注册失败字样,从RegisterServlet接收并显示失败原因;内含1个链接跳转到注册页。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ include file="time.jsp" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>注册失败</title>
</head>
<body style="text-align:center;">
<h2>注册失败!</h2>
<font color="red" face="bold" size=5>
    <%
        if(request.getAttribute("message")!= null){
            out.print(request.getAttribute("message"));
        }
    %>
</font>
<br>
<h2><a href="register.jsp" name="register">重新注册</a></h2>
</body>
</html>

Login.jsp:用户登录页

定义Uname(uP, uL)函数作为用户名预置,其值为刚注册的用户名或者刚退出登录的用户名。表单内username文本框,默认值即为*Uname()*的返回值。

(在撰写文档的时候发现一个小BUG,点清空,预置的用户名不消失,一种解决方法是Uname函数中加上一个条件判断:是否点击过清空)

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ include file="time.jsp" %>
<%@ page import="domain.User" %> 
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户登陆</title>
</head>
<body style="text-align:center;">
<%!
public String Uname(String uP,String uL){
    if(uL!=null){
        return uL;
    }else{
        return uP;
    }
}
%>
<% 
    Object obj = session.getAttribute("user");
    String unameP = (String)session.getAttribute("usernamePrepared");
    String unameL = (String)request.getParameter("usernameLogined");
    String UName = Uname(unameP,unameL);
    System.out.println("unameL:"+unameL);
if(null==obj) {
%>
    <h2>登录页面</h2>
    <form action="LoginServlet" method="post">
        <table align="center">
            <tr>
                <td>
                用户名:</td>
                <td style="text-align:center"><input type="text" size="21" name="username" value="<%=UName%>"/></td>
            </tr>
            <tr>
                <td>
                密&nbsp;&nbsp;&nbsp;&nbsp;码:</td>
                <td><input type="password" size="21" name="password"/></td>
            </tr>
        </table>
        <table align="center" cellspacing="5">
            <tr>
                <td><input type="submit" name="submit" value="登录"/></td>
                <td><input type="reset" name="reset" value="清空"/></td>
            </tr>
        </table>
    </form>
    <a href="register.jsp" name="register">跳转注册</a>
<%
} else {
%>
<%
    User u = (User)obj;
%>
用户:<%=u.getUsername() %><br/>您已经登录,无需再登录
<br/><a href="exit.jsp" name="exit">退出登录</a>
<br/><a href="login_success.jsp" name="success">返回</a>
<%}%>
</body>
</html>

LoginServlet.java

获取登录页提交的信息,查库,登录成功则在session中创建user关键字保存user对象,用以作登录检测;如果登录失败,将错误信息存入request关键字message中,传递给登录失败页。

package servlet;

import dao.UserDao;
import dao.impl.UserDaoImpl;
import domain.User;

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 java.io.IOException;

/**
 * LoginServlet实现类
 */
@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
       
    public LoginServlet() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            doPost(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        HttpSession session = request.getSession();
        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=UTF-8");

        // 获取前端页面传过来的值
        String username = request.getParameter("username");
        String password = request.getParameter("password");

        // 执行查询数据库逻辑
        UserDao userDao = new UserDaoImpl();
        User user = userDao.login(username, password);
        
        // 如果根据用户名和密码能查得到值
        if (user!= null) {
            session.setAttribute("user", user);        //登录成功   
            request.getRequestDispatcher("/login_success.jsp").forward(request,response);
        } else {    // 用户名或者密码错误执行以下代码
            request.setAttribute("message", "用户名或者密码错误");
            request.getRequestDispatcher("/defeat.jsp").forward(request,response);
        }
    }

}

login_success.jsp:登录成功页(内含链接:显示信息、信息补充和退出登录)

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="domain.User" %> 
<%@ include file="time.jsp" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登陆成功</title>
</head>
<body style="text-align:center;">
<% 
    
    Object obj = session.getAttribute("user");
    User user = (User)obj;
if(null==obj) {
%>    
您尚未登陆,请登录!
<a href="login.jsp" name="login">去登录</a>
<a href="register.jsp" name="register">跳转注册</a>
<%
} else {
%>
<%--<h2>登录成功!</h2>--%>
<font color="blue" size="5" family="Microsoft JhengHei">
    登录成功!<br/>
    <%
        String username = user.getUsername();
        session.setAttribute("user", user);
    %>
    欢迎您:<%=username %><br/>
<a href="showUserRegisterInfo.jsp" name="show">显示信息</a><br>
<a href="AddInfo.jsp" name="add">信息补充</a><br>
<a href="exit.jsp" name="exit">退出登录</a>
</font><br>
<%}%>
</body>
</html>

defeat.jsp:登录失败页

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ include file="time.jsp" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录失败</title>
</head>
<body style="text-align:center;">
<h2>登录失败!</h2>
<font color="red" face="bold" size=5>
    <%
        if(request.getAttribute("message")!= null){
            out.print(request.getAttribute("message"));
        }
    %>
</font>
<br>
<h2><a href="login.jsp" name="login">重新登录</a></h2>
</body>
</html>

exit.jsp:退出登录

先获取当前登录的用户名,存到预置用户名内,然后销毁session

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="domain.User" %> 
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>退出登录</title>
</head>
<body>
<%
    Object obj = session.getAttribute("user");
    User u = (User)obj;
    String unameLogined = (String)u.getUsername();
    System.out.println(unameLogined);
    session.invalidate();
%>
<jsp:forward page="login.jsp">
    <jsp:param value="<%=unameLogined%>" name="usernameLogined" />
</jsp:forward>
</body>
</html>

showUserRegisterInfo.jsp:显示用户信息页(内含修改密码链接)

session中获取登录的user对象,并读取各用户信息即可,不用额外的连接数据库。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@page import="java.util.List"%>
<%@page import="java.util.Iterator"%>
<%@page import="domain.User" %>
<%@ include file="time.jsp" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>显示用户信息</title>
</head>
<body style="text-align:center;">
<% 
    Object obj = session.getAttribute("user");
    User user = (User)obj;
if(null==obj) {
%>    
您尚未登陆,请登录!
<a href="login.jsp" name="login">去登录</a>
<a href="register.jsp" name="register">跳转注册</a>
<%
} else {
%>
<div style="text-align:center;">
当前用户:<%=user.getUsername() %>
<a href="exit.jsp" name="exit">退出登录</a>
<a href="login_success.jsp" name="success">返回</a>
</div>
<h1>用户注册信息表</h1>
<table border="1px" align="center">
            <tr>
                <th>用户名</th>
                <th>密码</th>
                <th>邮箱</th>
                <th>单位</th>
                <th>注册时间</th>
            </tr>
            <tr>
                <td><%=user.getUsername()%></td>
                <td><%=user.getPassword()%></td>
                <td><%=user.getEmail()%></td>
                <td><%=user.getUnit()%></td>
                <td><%=user.getRegistertime()%></td>

            </tr>
</table>
<h1>用户补充信息表</h1>
<table border="1px" align="center">
            <tr>
                <th>真名</th>
                <th>电话</th>
                <th>生日</th>
            </tr>
            <tr>
                <td><%=user.getRealname()%></td>
                <td><%=user.getPhone()%></td>
                <td><%=user.getBirth()%></td>
            </tr>
</table>
<br>
<h1><a href="updateInfo.jsp" name="changepwd">修改密码</a></h1>
<%}%>
</body>
</html>

AddInfoServlet.java

package 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 dao.UserDao;
import dao.impl.UserDaoImpl;
import domain.User;
import service.UserService;
import service.impl.UserServiceImpl;
import utils.StringUtil;

/**
 * AddInfo实现类
 */
@WebServlet("/AddInfoServlet")
public class AddInfoServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    private UserDao userDao = new UserDaoImpl();      
    private UserService userService = new UserServiceImpl();  
    
    public AddInfoServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //request.setCharacterEncoding("utf-8");
        HttpSession session = request.getSession();        
        User user = ((User) session.getAttribute("user"));
        
        String realname = request.getParameter("realname");
        String phone = request.getParameter("phone");
        String birth = request.getParameter("birth");
        
        user.setRealname(realname);
        user.setPhone(phone);
        user.setBirth(birth);
        //request.getAttribute("user");
        userService.addInfo(user);

        request.setAttribute("AddInfoResult", "补充信息成功!");
        request.getRequestDispatcher("/AddInfo.jsp").forward(request, response);
        return;
    }

}

UpdateInfoServlet.java

package 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 dao.UserDao;
import dao.impl.UserDaoImpl;
import domain.User;
import service.UserService;
import service.impl.UserServiceImpl;
import utils.StringUtil;

/**
 * UpdateInfoServlet实现类
 */
@WebServlet("/UpdateInfoServlet")
public class UpdateInfoServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    private UserDao userDao = new UserDaoImpl();      
    private UserService userService = new UserServiceImpl();

    public UpdateInfoServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
        //修改密码
            String username = request.getParameter("username");
            String oldPassword = request.getParameter("oldPassword");
            String newPassword = request.getParameter("newPassword");
            User user = userDao.login(username, oldPassword);
            String changePWDResult="";
            if(user==null) {
                changePWDResult="旧密码错误!";
            }
            
            if(StringUtil.isEmpty(oldPassword)||StringUtil.isEmpty(newPassword)) {
                changePWDResult="旧密码和新密码不能为空!";
            }
            
            if(StringUtil.isEmpty(changePWDResult)) {
                user.setPassword(newPassword);
                userService.saveUser(user);
                changePWDResult="密码修改成功!";
            }
            
            request.setAttribute("changePasswordResult", changePWDResult);
            request.getRequestDispatcher("/updateInfo.jsp").forward(request, response);
            return;
        }

}

AddInfo.jsp:信息补充页

同样是form+servlet的方式;script内有一个显示补充结果的函数;补充信息的格式校验我没有做,方法可参考注册时讲到的3种校验,需要用到正则表达式。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<%@ page import="domain.User" %>
<%@ include file="time.jsp" %>
<html>
<head>
<meta charset="UTF-8">
<title>补充信息</title>
<script type="text/javascript">
    $(function() {
        if ($("#AddInfoResult").length > 0) {
            alert($("#AddInfoResult").text());
        }
    });
</script>
</head>
<body style="text-align:center;">
<% 
    Object obj = session.getAttribute("user");
    User user = (User)obj;
if(null==obj) {
%>    
您尚未登陆,请登录!
<a href="login.jsp" name="login">去登录</a>
<a href="register.jsp" name="register">跳转注册</a>
<%
} else {
%>
<form action="AddInfoServlet" method="post">
        <input type="hidden" name="username" value=<%=user.getUsername() %>>
    <div style="text-align:center; padding-right: 10px;">
    当前用户:<%=user.getUsername() %>
        <a href="exit.jsp" name="exit">退出登录</a>
        <a href="login_success.jsp" name="success">返回</a>
    </div>
    <table border="1px" align="center">
        <div align="center">
        <h2>补充信息</h2></div>
        <tr align="center">
            <td align="justify">
            真名:&nbsp;<input type="text" name="realname" size=10 maxlength=20/><br/></td>
            <td align="justify">
            电话:&nbsp;<input type="text" name="phone" size=12 maxlength=16/>(11位手机号)<br/></td><!-- 限长16允许带+ -->
            <td align="justify">
            生日:&nbsp;<input type="text" name="birth" size=11 maxlength=11/>(格式:1977-12-14或者1977年12月14日)<br/></td>
            <td align="justify">
            <input type="submit" value="提交" name= "submit">
            &nbsp;&nbsp;<input type="reset" value="重置" name="reset"></td>
        </tr>
    </table>
</form>
    <%
        Object result = request.getAttribute("AddInfoResult");
            if (result != null) {
    %>
        <br>
        <h2><%=(String)result%></h2>
    <%
        }
    %>
<%}%>

</body>
</html>

updateInfo.jsp:修改密码

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ page import="domain.User" %> 
<%@ include file="time.jsp" %>
<%@ page import="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">
<script type="text/javascript" src="js/jquery.js"></script>
<title>修改密码</title>
<script type="text/javascript">
    $(function() {
        if ($("#changePasswordResult").length > 0) {
            alert($("#changePasswordResult").text());
        }
    });
</script>
</head>
<body style="text-align:center;">
<% 
    
    Object obj = session.getAttribute("user");
    User user = (User)obj;
if(null==obj) {
%>    
您尚未登陆,请登录!
<a href="login.jsp" name="login">去登录</a>
<a href="register.jsp" name="register">跳转注册</a>
<%
} else {
%>
<div style="text-align:center">
    当前用户:<%=user.getUsername() %>
        <a href="exit.jsp" name="exit">退出登录</a>
        <a href="login_success.jsp" name="success">返回</a><br>
    <h1>修改密码</h1>
</div>    
    <form action="UpdateInfoServlet" method="post">
        <input type="hidden" name="username" value=<%=user.getUsername() %>>
        <table align="center">
            <tr>
                <td>旧密码:</td>
                <td><input type="password" id="oldPassword" name="oldPassword"></td>
            </tr>
            <tr>
                <td>新密码:</td>
                <td><input type="password" id="newPassword" name="newPassword"></td>
            </tr>
        </table>
        <table align="center" cellspacing="12">
            <tr>
                <td align="left"><input type="submit" value="提交"></td>
                <td align="left"><a    href="exit.jsp" name="exit2">退出登陆</a></td>
            </tr>        </table>
    </form>

    <%
        Object result = request.getAttribute("changePasswordResult");
            if (result != null) {
    %>
<div style="text-align:center">
        <br/>
    <h2><%=(String)result%></h2>
</div>    
    <%
        }
    %>
<%}%>
</body>
</html>

web.xml:欢迎页和servlet配置映射

将欢迎页设置为登录页;

Servlet 3.0 版本以上,在servlet文件中以*@WebServlet("/LoginServlet")*的形式即可完成配置;在低版本的Servlet中,需要按如下格式配置web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
  <display-name>UserManager</display-name>
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>

  <servlet>
    <servlet-name>LoginServlet</servlet-name>
    <servlet-class>servlet.LoginServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>LoginServlet</servlet-name>
    <url-pattern>/LoginServlet</url-pattern>
  </servlet-mapping>

  <servlet>
    <servlet-name>RegisterServlet</servlet-name>
    <servlet-class>servlet.RegisterServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>RegisterServlet</servlet-name>
    <url-pattern>/RegisterServlet</url-pattern>
  </servlet-mapping>

  <servlet>
    <servlet-name>UpdateInfoServlet</servlet-name>
    <servlet-class>servlet.UpdateInfoServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>UpdateInfoServlet</servlet-name>
    <url-pattern>/UpdateInfoServlet</url-pattern>
  </servlet-mapping>

  <servlet>
    <servlet-name>AddInfoServlet</servlet-name>
    <servlet-class>servlet.AddInfoServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>AddInfoServlet</servlet-name>
    <url-pattern>/AddInfoServlet</url-pattern>
  </servlet-mapping>
</web-app>

系统功能展示

Demo Vedio of UM System

标签: java servlet 前端

本文转载自: https://blog.csdn.net/m0_51810668/article/details/125617588
版权归原作者 Evanpatchouli℃ 所有, 如有侵权,请联系我们删除。

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