当前位置：网站首页>jsp连接Oracle实现登录注册
jsp连接Oracle实现登录注册
2022-06-28 05:21:00 【辕小白】
要求
tomcat、oracle数据库服务启动
需要一个Oracle的驱动器，放在WEB-INFO的lib。版本号如下：
Eclipse的创建目录
数据库文件
在Oracle数据库中的scott的连接，建立一个名字叫t_user的表，表格的字段为username,password。
UserDao.java
UserDao接口，定义查找用户（findUser）方法和注册用户（addUser）方法。
package jsp2.dao;
import jsp2.po.User;
public interface UserDao {
/** * 查找用户 * */
public User findUser(User user);
/** * 注册用户 * */
public void addUser(User user);
}
BaseDao.java
抽象类，实现 数据库连接，关闭。
package jsp2.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public abstract class BaseDao {
private final static String url="jdbc:oracle:thin:@localhost:1521:orcl";
private final static String name="scott";
private final static String pass="tiger";
public Connection conn = null;
public PreparedStatement pstm = null;
public ResultSet rs = null;
/** * 数据库连接 * */
public Connection getConn() {
try {
//加载数据库驱动
Class.forName("oracle.jdbc.driver.OracleDriver");
//创建数据库连接对象
conn = DriverManager.getConnection(url, name, pass);
}catch(ClassNotFoundException e){
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
/** * 关闭方法 * */
public void close() {
try {
if(rs!=null) {
rs.close();
rs=null;
}
if(pstm!=null) {
pstm.close();
pstm=null;
}
if(conn!=null) {
conn.close();
conn=null;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
UserDaoImpl.java
UserDao实现类
package jsp2.dao.impl;
import java.sql.SQLException;
import jsp2.dao.BaseDao;
import jsp2.dao.UserDao;
import jsp2.po.User;
public class UserDaoImpl extends BaseDao implements UserDao {
@Override
public User findUser(User user) {
// TODO Auto-generated method stub
User u = null;
try {
String sql="select username,password from t_user where username=? "
+ "and password=?";
conn = getConn();
pstm =conn.prepareStatement(sql);
pstm.setString(1, user.getUsername());
pstm.setString(2, user.getPassword());
rs= pstm.executeQuery();
while (rs.next()) {
u = new User(rs.getString("username"),rs.getString("password"));
}
} catch (SQLException e) {
// TODO: handle exception
}finally {
close();//调用关闭方法
}
return u;
}
@Override
public void addUser(User user) {
// TODO Auto-generated method stub
try {
String sql="insert into t_user(username,password) values(?,?)";
conn = getConn();
pstm =conn.prepareStatement(sql);
pstm.setString(1, user.getUsername());
pstm.setString(2, user.getPassword());
pstm.executeQuery();
} catch (SQLException e) {
// TODO: handle exception
}finally {
close();
}
}
}
User.java
封装一个user对象。
package jsp2.po;
public class User {
private String username;
private String password;
public User(String username, String password) {
this.username = username;
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
UserService.java
UserService接口，继承UserDao中的方法，定义用户是否重复方法。
package jsp2.service;
import jsp2.dao.UserDao;
import jsp2.po.User;
public interface UserService extends UserDao {
/** *用户是否重复 */
public boolean isReg(User user);
}
UserServiceImpl.java
package jsp2.service.impl;
import jsp2.dao.UserDao;
import jsp2.dao.impl.UserDaoImpl;
import jsp2.po.User;
import jsp2.service.UserService;
public class UserServiceImpl implements UserService {
public UserDao uDao = new UserDaoImpl();
@Override
public User findUser(User user) {
// TODO Auto-generated method stub
return uDao.findUser(user);
}
@Override
public void addUser(User user) {
// TODO Auto-generated method stub
uDao.addUser(user);
}
@Override
public boolean isReg(User user) {
// TODO Auto-generated method stub
User u =uDao.findUser(user);
if(u==null) {
return true;
}
return false;
}
}
login.jsp
登录页面，用于登录用户，登录成功后跳转到success页面，失败返回login页面。
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录</title>
<style>
input[type="submit"] {
width: 100px;
margin: 0 5px;
}
input[type="button"] {
width: 100px;
margin: 0 5px;
}
</style>
</head>
<body>
<center>
<font face="楷体" size="6" color="#000">登录界面</font>
<form action="index.jsp" method="post">
<table width="300" height="180" border="5" bordercolor="#A0A0A0">
<tbody>
<tr>
<td><label>用户名：</label></td>
<td><input type="text" name="name" maxlength = "12" placeholder="请输入用户名!" /></td>
</tr>
<tr>
<td><label>密 码：</label></td>
<td><input type="password" name="pwd" maxlength = "16" placeholder="请输入密码!" /></td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="submit" value="登陆" />
<input type="button" value="注册" onclick = "window.open('reg.jsp')" /></td>
</tr>
</tbody>
</table>
</form>
</center>
</body>
</html>
index.jsp
登录检测，调用UserService中的java代码（方法），实现用户登录
<%@page import="jsp2.service.impl.UserServiceImpl"%>
<%@page import="jsp2.service.UserService"%>
<%@page import="jsp2.po.User" %>
<%@ page import="java.sql.*"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>login</title>
</head>
<body>
<%
request.setCharacterEncoding("UTF-8");
String uName = request.getParameter("name");//获取name值
String uPwd = request.getParameter("pwd");//获取pwd值
UserService userService = new UserServiceImpl();
User user=userService.findUser(new User(uName,uPwd));//调用findUser方法，用户登录
if(user!=null){
//登录成功
session.setAttribute("info", user);
//设置session值,自己要的数据什么的放在session里面传来传去
response.sendRedirect("success.jsp");
}else{
//登录失败
response.sendRedirect("login.jsp");
}
%>
</body>
</html>
reg.jsp
注册页面，用于注册用户，注册成功后跳转到login页面，失败返回reg页面。
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>注册界面</title>
<style>
input[type="submit"] {
width: 100px;
margin: 0 5px;
}
input[type="reset"] {
width: 100px;
margin: 0 5px;
}
</style>
<script>
function addCheck() {
var username = document.getElementById("username").value;
var password = document.getElementById("password").value;
var newword = document.getElementById("newword").value;
if (username == "") {
alert("用户名不能为空!");
document.getElementById("username").focus();
return false;
}
if (password == "") {
alert("密码不能为空!");
document.getElementById("password").focus();
return false;
}
if (password != newword) {
alert("两次输入密码不相同!");
document.getElementById("newword").focus();
return false;
}
}
function validate() {
var flag = addCheck();
if (flag == false)
return false;
return true;
}
</script>
</head>
<body>
<center>
<font face="楷体" size="6" color="#000">注册界面</font>
<form action="index2.jsp" method="post"
onsubmit="return validate()">
<table width="300" height="180" border="5" bordercolor="#A0A0A0">
<tr>
<th>用户名：</th>
<td><input type="text" name="name" id="username"
placeholder="输入4个字符以内" maxlength="4"></td>
</tr>
<tr>
<th>输入密码：</th>
<td><input type="password" name="pwd" id="password"
placeholder="输入12个字符以内" maxlength="12"></td>
</tr>
<tr>
<th>确认密码：</th>
<td><input type="password" name="nwd" id="newword"
placeholder="重新输入密码" maxlength="12"></td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="submit"value="注 册">
<input type="reset" value="重 置"></td>
</tr>
</table>
</form>
</center>
</body>
</html>
index2.jsp
注册检测，调用UserService中的java代码（方法），实现用户注册
<%@page import="jsp2.service.impl.UserServiceImpl"%>
<%@page import="jsp2.service.UserService"%>
<%@page import="jsp2.po.User" %>
<%@ page import="java.sql.*" %>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>login</title>
</head>
<body>
<%
request.setCharacterEncoding("UTF-8");
String uName = request.getParameter("name");//获取输出的name值
String uPwd = request.getParameter("pwd");//获取输出的pwd值
UserService userService = new UserServiceImpl();
boolean fg = userService.isReg(new User(uName,uPwd));//调用isReg方法
if(fg){
//注册成功
userService.addUser(new User(uName,uPwd));//注册用户
response.sendRedirect("login.jsp");
}else{
//注册失败
response.sendRedirect("reg.jsp");
}
%>
</body>
</html>
success.jsp
登录成功后跳转页面
<%@page import="jsp2.po.User"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录成功</title>
</head>
<body>
<center>
<h3>
<%
if(session.getAttribute("info")==null){
response.sendRedirect("login.jsp");
}else{
User user=(User) session.getAttribute("info");
%>
欢迎你：<%=user.getUsername() %>
<%
}
%>
<br/>
<a href="out.jsp">注销</a>
</h3>
</center>
</body>
</html>
out.jsp
将当前登录的用户注销，退出登录成功页面，需重新再次登录才能进入页面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>注销</title>
</head>
<body>
<%
session.removeAttribute("info"); //清空当前session中指定对象的属性
response.sendRedirect("login.jsp");//重定向(页面跳转)
%>
</body>
</html>
web.xml
<?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_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>jsp2</display-name>
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
<!-- 即客户端连续两次与服务器交互间隔时间最长为2分钟， 2分钟后session.getAttribute()获取的值为空-->
<session-config>
<session-timeout>2</session-timeout>
</session-config>
</web-app>
边栏推荐
- Cgo+gsoap+onvif learning summary: 8. Summary of arm platform cross compilation operation and common problems
- Biovendor sRAGE antibody solution
- Sorting out some topics of modern exchange principle MOOC
- 程序员坐牢了，会被安排去写代码吗？
- CPG 固体支持物研究：Lumiprobe通用 CPG II 型
- 8VC Venture Cup 2017 - Elimination Round D. PolandBall and Polygon
- Rxswift -- (1) create a project
- Realizing color detection with OpenCV
- 改性三磷酸盐研究：Lumiprobe氨基-11-ddUTP
- SlicePlane的Heading角度与Math.atan2(y,x)的对应转换关系
猜你喜欢
Don't roll! How to reproduce a paper with high quality?
mysql导出数据库字典成excel文件
店铺进销存管理系统源码
Leetcode 88: merge two ordered arrays
The latest examination questions and answers for the eight members (standard members) of Liaoning architecture in 2022
How high is the gold content of grade II cost engineer certificate? Just look at this
如何学习可编程逻辑控制器（PLC）？
改性三磷酸盐研究：Lumiprobe氨基-11-ddUTP
双向电平转换电路
MySQL 45讲 | 05 深入浅出索引（下）
随机推荐
Object detection with OpenCV
TypeScript基础类型
Assembly common instructions
Pcr/qpcr research: lumiprobe dsgreen is used for real-time PCR
Docker安装Mysql5.7并开启binlog
Excel将一行的内容进行复制时,列与列之间是用制表符“\t”进行分隔的
？ How to write the position to output true
Lumiprobe cell imaging analysis: PKH26 cell membrane labeling kit
Steve Jobs' speech at Stanford University -- follow your heart
无线传感器网络学习笔记（一）
基于订单流工具，我们能看到什么？
2022 special operation certificate examination question bank and simulation examination for safety management personnel of fireworks and firecrackers business units
Quartus replication IP core
并发之wait/notify说明
Operation of simulated examination platform of G3 boiler water treatment recurrent training question bank in 2022
证明素数/质数有无限多个
改性三磷酸盐研究：Lumiprobe氨基-11-ddUTP
Camera Basics
Docker installs mysql5.7 and starts binlog
如何做好水库大坝安全监测工作