项目Servlet+jsp+mysql的资产管理系统

阿皮匹

2024-05-09 帮助1人

登陆功能实现：

1. 添加数据库驱动

2. 配置context.xml

学新通

<Resource
name="jdbc/IT"
auth="Container"
type="javax.sql.DataSource"
driverClassName="com.mysql.cj.jdbc.Driver"
url="jdbc:mysql://localhost:3306/assets?serverTimezone=UTC"
username="root"
password="232818"
maxActive="100"
maxIdle="30"
maxWait="1000"/>

3. 完成数据库连接

学新通

package IT.org.Util;
import java.sql.Connection;
import java.sql.SQLException;
import javax.naming.InitialContext;
import javax.sql.DataSource;
public class DatabaseConnection {
private Connection conn=null;
private DataSource ds=null;
private InitialContext ctx=null;
public DatabaseConnection() {
try {
ctx=new InitialContext();
ds=(DataSource)ctx.lookup("java:comp/env/jdbc/IT");
} catch (Exception e) {
// TODO: handle exception
}
}
public Connection getConnection() {
try {
this.conn=ds.getConnection();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
return conn;
}
}
public void closeCon() {
try {
if(conn!=null) conn.close();
} catch (Exception e) {
// TODO: handle exception
}
}
public static void main(String[] args) {
DatabaseConnection d=new DatabaseConnection();
System.out.println(d.getConnection());
}
}

jsp页面：

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>IT资产管理系统登陆</title>
<link rel="stylesheet" type="text/css" href="./css/Login.css"/>
<script src="./js/jquery.js" type="text/javascript" charset="utf-8"></script>
<script src="./js/登录注册.js" type="text/javascript" charset="utf-8"></script>
<link href="img/title.ico" rel="SHORTCUT ICON" />
</head>
<body>
<section><div style="position: absolute;top: -40px;left: 35%;"><img src="img/loginlogo.png" width="550" height="200"></div>
<div class="container" >
<div class="user signinBx">
<div class="imgBX" ><img src="./img/bc1.jpg" /></div>
<div class="formBx">
<form action="Login_Register" method="post">
<input type="hidden" name="mytype" value="login"/>
<h2>登录</h2>
<input type="text" placeholder="账户名" id="un" name="un"> <br>
<label id="username"></label><br>
<input type="password" placeholder="密码" id="pw" name="pw"> <br>
<label id="password"></label> <br>
<a><input type="submit" value="登录" id="sub"></a>
<p class="signup">未注册账户请点击 <a href="#" id="zhuce">注册</a></p>
</form>
</div>
</div>
<div class="user signupBx">
<div class="formBx">
<label id="erroinfo"></label>
<form action="Login_Register" method="post">
<input type="hidden" name="mytype" value="register"/>
<h2>注册</h2>
<input type="text" placeholder="姓名" id="username" name="reun">
<input type="text" placeholder="邮箱" id="mainneme" name="email">
<input type="password" placeholder="密码" id="inputpassword" name="repw">
<input type="password" placeholder="再次确认密码" id="inputpassword1" onkeyup="validate()"><span id="tip"></span>
<input type="submit" id="zhecebtn" value="注册">
<p class="signup">已注册账户请点击<a href="#" id="denglu">登录</a></p>
</form>
</div>
<div class="imgBX"><img src="./img/bc3.jpg" /></div>
</div>
</div>
</section>
</body>
</html>

登陆DAO部分：

文件目录

学新通

Dao

实现类部分：

public class IUserDAOImpl implements IUserDAO{
private Connection conn;
public IUserDAOImpl(Connection conn) {
this.conn=conn;
}
@Override
public boolean findLogin(TUser tuser) throws Exception {
// TODO Auto-generated method stub
String sql="SELECT * FROM tuser;";
Statement st=conn.createStatement();
ResultSet rs=st.executeQuery(sql);
boolean isfind=false;
while(rs.next()) {
if(tuser.getUserName().equals(rs.getString("username").trim())&&tuser.getPassword().equals(rs.getString("password").trim())) {
isfind=true;
break;
}
}
if(isfind) return true;
else return false;
}
/**
* 注册插入
*/
@Override
public int register(TUser tuser) throws Exception {
// TODO Auto-generated method stub
String userid=String.valueOf(System.nanoTime());
String sql="INSERT INTO tuser VALUE(?,?,?,'待填','待填','待填','待填',?,'待填','待填');";
PreparedStatement ppst=conn.prepareStatement(sql);
ppst.setString(1,userid);
ppst.setString(2,tuser.getUserName());
ppst.setString(3,tuser.getPassword());
ppst.setString(4,tuser.getEmail());
int rs = ppst.executeUpdate();
ppst.close() ;
return rs;
}

Servlet部分：

package IT.org.Controller;
import java.io.IOException;
import java.util.*;
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 IT.org.DAO.IUserDAO;
import IT.org.Factory.DAOFactory;
import IT.org.VO.TUser;
/**
* Servlet implementation class Login_Register
*/
@WebServlet("/Login_Register")
public class Login_Register extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public Login_Register() {
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.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
String mytype=request.getParameter("mytype");
String path="Login.jsp";
//登录功能
if(mytype.equals("login")) {
String username=request.getParameter("un");
String password=request.getParameter("pw");
System.out.println(username);
System.out.println(password);
TUser tuser=new TUser(username.trim(),password.trim());
IUserDAO dao=DAOFactory.getIUserInstance();
try {
if(dao.findLogin(tuser)) {
ArrayList<TUser> users=DAOFactory.getIUserInstance().findAllTUser();
for(TUser us:users) {
if(us.getUserName().equals(tuser.getUserName())) {
tuser=us;
break;
}
}
HttpSession session=request.getSession();
System.out.println("登录者id" tuser.getUserID());
session.setAttribute("tuser",tuser);
request.getRequestDispatcher("index.jsp").forward(request, response);
}
else request.getRequestDispatcher(path).forward(request, response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//注册功能
else if(mytype.equals("register")) {
String username=request.getParameter("reun");
String password=request.getParameter("repw");
String email=request.getParameter("email");
boolean isexist=false;
try {
ArrayList<TUser> users=DAOFactory.getIUserInstance().findAllTUser();
for(TUser u:users) {
if(u.getUserName().equals(username.trim())||u.getEmail().equals(email.trim())) {
isexist=true;
break;
}
}
if(!isexist) {
TUser tuser=new TUser(username, password,email);
try {
DAOFactory.getIUserInstance().register(tuser);
request.getRequestDispatcher(path).forward(request, response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}else {
System.out.println("用户名or邮箱已使用");
}
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
}

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项目Servlet+jsp+mysql的资产管理系统

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登陆功能实现：

1. 添加数据库驱动

2. 配置context.xml

3. 完成数据库连接

jsp页面：

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