jsp登录注册
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1、Login.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> <title>登录</title> </head> <body> <form action="LoginServlet" method="post"> 账号：<input type="text" name="account"/><br/> 密码：<input type="password" name="password"/><br/><br/> <input type="submit" name="submit" value="登录" /> <a href="Register.jsp">注册</a> </form> </body> </html>
2、Register.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> <title>注册</title> </head> <body> <form action="RegisterServlet" method="post"> 账号：<input type="text" name="account"><br/> 密码：<input type="password" name="password"><br/> 性别：<input type="text" name="sex"><br/> 邮箱：<input type="text" name="email"><br/><br/> <input type="submit" name="submit" value="注册"> </form> </body> </html>
3、User类，构造函数封装数据
package com.cn.jspT2; public class User { private String account; private String password; private String sex; private String email; public String getAccount() { return account; } public void setAccount(String account) { this.account = account; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public User(String account, String password, String sex, String email) { super(); this.account = account; this.password = password; this.sex = sex; this.email = email; } public User() { super(); } }
4、DBHelper类
package com.cn.jspT2; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.Statement; /** * 获取数据库操作的连接对象 * 关闭数据库操作的各种资源 * @author 晏先政 * */ public class DBHelper { private static final String className = "com.mysql.jdbc.Driver"; private static final String url = "jdbc:mysql://localhost:3306/jsp?characterEncoding=utf8&useSSL=true"; private static final String uname = "root"; private static final String upass = "211599100yxz"; /** * 获取数据库连接对象的方法 */ public static Connection getConn(){ Connection conn = null; try{ Class.forName(className); conn = DriverManager.getConnection(url,uname, upass); } catch(Exception e){ e.printStackTrace(); } return conn; } /** * 关闭数据库连接对象 */ public static void closeConn(Connection conn){ try{ if(conn!=null){ conn.close(); } } catch(Exception e){ e.printStackTrace(); } } /** * 关闭数据库操作对象 */ public static void closeStmt(Statement stmt){ try{ if(stmt!=null){ stmt.close(); } } catch(Exception e){ e.printStackTrace(); } } /** * 关闭数据库操作对象 */ public static void closePstmt(PreparedStatement pstmt){ try{ if(pstmt!=null){ pstmt.close(); } } catch(Exception e){ e.printStackTrace(); } } /** * 关闭数据库操作对象 */ public static void closeRs(ResultSet rs){ try{ if(rs!=null){ rs.close(); } } catch(Exception e){ e.printStackTrace(); } } }
5、UserDao类，操作数据库
package com.cn.jspT2; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; public class UserDao { private Connection conn = null; private PreparedStatement pstmt = null; private ResultSet rs = null; public void addUser(User user){ try { conn = DBHelper.getConn(); String sql = "insert into user_info(account,password,sex,email) values(?,?,?,?)"; PreparedStatement pstmt = conn.prepareStatement(sql); pstmt.setString(1, user.getAccount()); pstmt.setString(2, user.getPassword()); pstmt.setString(3, user.getSex()); pstmt.setString(4, user.getEmail()); pstmt.execute(); } catch (Exception e) { e.printStackTrace(); }finally{ DBHelper.closePstmt(pstmt); DBHelper.closeConn(conn); } } public Boolean queryUser(String account,String password){ try { conn = DBHelper.getConn(); String sql = "select * from user_info where account=? and password=?"; pstmt = conn.prepareStatement(sql); pstmt.setString(1, account); pstmt.setString(2, password); rs = pstmt.executeQuery(); if(rs.next()) { return true; }else{ return false; } } catch (Exception e) { e.printStackTrace(); }finally{ DBHelper.closeRs(rs); DBHelper.closePstmt(pstmt); DBHelper.closeConn(conn); } return false; } }
6、LoginServlet
package com.cn.jspT2; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class LoginServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); String account = request.getParameter("account"); String password = request.getParameter("password"); UserDao userDao = new UserDao(); Boolean user = userDao.queryUser(account, password); if(user){ response.setContentType("text/html;charset=utf-8"); PrintWriter pw = response.getWriter(); pw.print("<script> window.onload=function(){alert(‘"+account+"恭喜你登录成功‘);}</script>"); }else{ response.setContentType("text/html;charset=utf-8"); PrintWriter pw = response.getWriter(); pw.print("<script> window.onload=function(){alert(‘对不起账号或者密码不正确‘);}</script>"); } } }
7、RegisterServlet
package com.cn.jspT2; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class RegisterServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); String account = request.getParameter("account"); String password = request.getParameter("password"); String sex = request.getParameter("sex"); String email = request.getParameter("email"); User user = new User(); user.setAccount(account); user.setPassword(password); user.setSex(sex); user.setEmail(email); UserDao userdao = new UserDao(); userdao.addUser(user); response.setContentType("text/html;charset=utf-8"); // response.setCharacterEncoding("utf-8"); PrintWriter pw = response.getWriter(); pw.print("<script> window.onload=function(){alert(‘"+account+"恭喜你注册成功‘);}</script>"); response.sendRedirect("Login.jsp"); } }
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