jsp+Servlet+javaBean实现登录和注册

客官°小女子只卖身不卖艺 2022-07-14 08:43 177阅读 0赞

### 目录： ###

![Center][]

### 数据库设计： ###

CREATE SCHEMA `student` ;
    CREATE  TABLE `student`.`user` (
    `id` INT NOT NULL AUTO_INCREMENT ,  
    `user` VARCHAR(45) NOT NULL ,  
    `pwd` VARCHAR(45) NOT NULL ,  
    `name` VARCHAR(45) NOT NULL ,  
    `xxx` VARCHAR(45) NOT NULL ,  
    `age` INT NOT NULL ,  
    PRIMARY KEY (`id`) );

### 数据库交互界面： ###

![Center 1][]

### web.xml ###

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

### index.jsp ###

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <%
    	String path = request.getContextPath();
    	String basePath = request.getScheme() + "://"
    			+ request.getServerName() + ":" + request.getServerPort()
    			+ path + "/";
    %>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
    <head>
    <base href="<%=basePath%>">
    
    <title>欢迎来到学生管理系统</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    
    </head>
    
    <body>
    	<div align="center">
    		<font size=" 2" color="#FF6633">用户登录</font>
    	</div>
    	<form id="form1" name="form1" method="post" action="loginServlet">
    		<table width="357" border="0" align="center">
    			<tr>
    				<td width="128">用户名：</td>
    				<td width="219"><label> <input name="user" type="text"
    						id="user" /> </label></td>
    			</tr>
    			<tr>
    				<td>密 码：</td>
    				<td><label> <input name="pwd" type="password" id="pwd" />
    				</label></td>
    			</tr>
    			<tr>
    				<td><label> <input type="submit" name="Submit"
    						value="登录" /> </label></td>
    				<td><label><a href="addUser.jsp">用户注册</a> </label></td>
    			</tr>
    		</table>
    		<p> </p>
    	</form>
    </body>
    </html>

### 界面： ###

![Center 2][]

### addUser.jsp ###

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%
    	String path = request.getContextPath();
    	String basePath = request.getScheme() + "://"
    			+ request.getServerName() + ":" + request.getServerPort()
    			+ path + "/";
    %>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
    <head>
    <base href="<%=basePath%>">
    
    <title>用户注册</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    
    
    </head>
    
    <body>
    	<p align="center">
    		<font size=" 3" color="#FF3300">用户注册</font>
    	</p>
    	<form id="form1" name="form1" method="post" action="addUserServlet">
    		<table width="340" border="0" align="center">
    			<tr>
    				<td width="141">用户名：</td>
    				<td width="189"><label> <input name="user" type="text"
    						id="user" /> </label></td>
    			</tr>
    			<tr>
    				<td>密码：</td>
    				<td><label> <input name="pwd" type="password" id="pwd" />
    				</label></td>
    			</tr>
    			<tr>
    				<td>重输密码：</td>
    				<td><label> <input name="pwd1" type="password"
    						id="pwd1" /> </label></td>
    			</tr>
    			<tr>
    				<td>姓名：</td>
    				<td><label> <input name="name" type="text" id="name" />
    				</label></td>
    			</tr>
    			<tr>
    				<td>性别：</td>
    				<td><label> <input name="xxx" type="radio" value="男"
    						checked="checked" /> 男 <input type="radio" name="xxx" value="女" />
    						女</label></td>
    			</tr>
    			<tr>
    				<td>年龄：</td>
    				<td><label> <input name="age" type="text" id="age" />
    				</label></td>
    			</tr>
    			<tr>
    				<td><label> <input type="submit" name="Submit"
    						value="提交" /> </label></td>
    				<td><label> <input type="reset" name="Submit2"
    						value="重置" /> </label></td>
    			</tr>
    		</table>
    	</form>
    </body>
    </html>

### 界面： ###

![Center 3][]

### User.java ###

package bean;
    
    public class User {
    	private String user;
    	private String pwd;
    	private String name;
    	private String xxx;
    	private int age;
    
    	public String getUser() {
    		return user;
    	}
    
    	public void setUser(String user) {
    		this.user = user;
    	}
    
    	public String getPwd() {
    		return pwd;
    	}
    
    	public void setPwd(String pwd) {
    		this.pwd = pwd;
    	}
    
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	public String getxxx() {
    		return xxx;
    	}
    
    	public void setxxx(String xxx) {
    		this.xxx = xxx;
    	}
    
    	public int getAge() {
    		return age;
    	}
    
    	public void setAge(int age) {
    		this.age = age;
    	}
    }

### DAO.java ###

package dao;
    
    import getConnection.GetConnection;
    
    import java.sql.Connection;
    import java.sql.PreparedStatement;
    import java.sql.ResultSet;
    import java.sql.SQLException;
    
    import com.mysql.jdbc.*;
    
    import bean.User;
    
    public class DAO {
    	private Connection conn;
    	private PreparedStatement pstat;
    	String sql = "";
    
    	/**
    	 * 
    	 * 用户登录
    	 */
    	public boolean logoin(User user) throws SQLException {
    		conn = GetConnection.getConnection();
    		boolean i = false;
    		sql = "select * from user where user=? and pwd=?";
    
    		pstat = conn.prepareStatement(sql);
    
    		pstat.setString(1, user.getUser());
    		pstat.setString(2, user.getPwd());
    
    		ResultSet rs1 = (ResultSet) pstat.executeQuery();
    		if (rs1.next()) {
    			i = true;
    			rs1.close();
    			pstat.close();
    		} else {
    			i = false;
    			rs1.close();
    			pstat.close();
    		}
    		conn.close();
    		return i;
    	}
    
    	/**
    	 * 用户注册
    	 */
    	public void addUser(User user) {
    		conn = GetConnection.getConnection();
    		sql = "insert into user values(?,?,?,?,?,?)";
    		try {
    			pstat = conn.prepareStatement(sql);
    			pstat.setString(1, null);
    			pstat.setString(2, user.getUser());
    			pstat.setString(3, user.getPwd());
    			pstat.setString(4, user.getName());
    			pstat.setString(5, user.getxxx());
    			pstat.setInt(6, user.getAge());
    			pstat.executeUpdate();
    			pstat.close();
    			conn.close();
    
    		} catch (SQLException e) {
    			e.printStackTrace();
    		}
    
    	}
    }

### GetConnection.java ###

package getConnection;
    
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.SQLException;
    
    /**
     * 
     * 用JDBC的方法获得数据库的连接
     * 
     */
    public class GetConnection {
    	// 通过静态方法注册驱动，获得连接
    
    	public static Connection getConnection() {
    		String driver = "com.mysql.jdbc.Driver";
    		String url = "jdbc:mysql://localhost/student";
    		Connection con = null;
    		try {
    			Class.forName(driver);
    			try {
    				con = DriverManager.getConnection(url, "root", "root");
    			} catch (SQLException e) {
    				e.printStackTrace();
    			}
    		} catch (ClassNotFoundException e) {
    			e.printStackTrace();
    		}
    		System.out.println("已获得数据库的连接");
    		return con;
    	}
    	/*
    	 * public static void main(String args[]){ getConnection(); }
    	 */
    }

### loginServlet.java ###

package servlet;
    
    import java.io.IOException;
    import java.io.PrintWriter;
    import java.sql.SQLException;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import dao.DAO;
    
    import bean.User;
    
    public class loginServlet extends HttpServlet {
    	public void destory() {
    		super.destroy();
    	}
    
    	public void doPost(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    		request.setCharacterEncoding("utf-8");
    		response.setContentType("text/html");
    		PrintWriter out = response.getWriter();
    		String name = new String(request.getParameter("user").getBytes(
    				"ISO8859_1"), "GBK");
    		String pwd = new String(request.getParameter("pwd").getBytes(
    				"ISO8859_1"), "utf-8");
    		User user = new User();
    		user.setUser(name);
    		user.setPwd(pwd);
    		DAO dao = new DAO();
    		boolean isLogin;
    		try {
    			isLogin = dao.logoin(user);
    			if (isLogin) {
    				response.sendRedirect("MYJSP.jsp");
    			} else {
    				response.sendRedirect("index.jsp");
    			}
    		} catch (SQLException e) {
    			e.printStackTrace();
    		}
    	}
    
    	public void doGet(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    		doPost(request, response);
    	}
    
    	public void init() throws ServletException {
    
    	}
    }

### addUserServlet.java ###

package servlet;
    
    import java.io.IOException;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import dao.DAO;
    
    import bean.User;
    
    public class addUserServlet extends HttpServlet {
    
    	/**
    	 * Destruction of the servlet.
    	 */
    	public void destroy() {
    		super.destroy(); // Just puts "destroy" string in log
    
    		// Put your code here
    
    	}
    
    	public void doGet(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    
    		response.setContentType("text/html");
    		doPost(request, response);
    	}
    
    	public void doPost(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    
    		response.setContentType("text/html");
    		response.setCharacterEncoding("utf-8");
    		String user1 = request.getParameter("user");
    		String pwd = request.getParameter("pwd");
    		String name = new String(request.getParameter("name").getBytes(
    				"ISO8859_1"), "utf-8");
    		String xxx = new String(request.getParameter("xxx").getBytes(
    				"ISO8859_1"), "utf-8");
    		String age1 = request.getParameter("age");
    		User user = new User();
    		user.setUser(user1);
    		user.setPwd(pwd);
    		user.setName(name);
    		user.setxxx(xxx);
    		int age;
    		if (age1 != null) {
    			age = Integer.parseInt(age1);
    			user.setAge(age);
    		}
    		DAO dao = new DAO();
    		dao.addUser(user);
    
    		request.setAttribute("info", new String(" 添加成功！恭喜！！" + " "));
    		request.setAttribute("id", new String("a"));
    		request.setAttribute("denglu", new String(" 登陆"));
    
    		request.getRequestDispatcher("info.jsp").forward(request, response);
    	}
    
    	public void init() throws ServletException {
    		// Put your code here
    	}
    
    }

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