只帖源代码，，，，不讲解。
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");
}
}
时间： 2024-10-14 13:15:42