jsp+service+servlet+Oracle实现简单的数据库交互（登录注册）

java部分的整体架构

代码部分：

1.Javabean代码：

package com.login.bean;

public class Login {
private String name;
private String pwd;
private String email;

public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}

}

2.dao代码：

LoginDao.java

package com.orcl.dao;

import java.sql.SQLException;
import java.util.ArrayList;

import javax.xml.ws.Response;

import org.apache.tomcat.jni.User;

import com.login.bean.Login;
import com.xm.util.Oboperation;

public class loginDao extends Oboperation{

public Login getNamePwd(String name,String pwd,String email) {
Login lg=null;

getConn();
//查询语句
String sql="select * from userlogin where pwd=? and name=? or email=?";
extQuery(sql,pwd,name,email);

try {
//处理结果集
if(rs.next()) {
lg=new Login();
lg.setName(rs.getString("name"));
lg.setPwd(rs.getString("pwd"));
lg.setEmail(rs.getString("email"));

}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
closeAll();
return lg;

}
//按name条件查询 与忘记密码联系
public Login getName(String name) {
Login lg2=null;

getConn();
String sql="select * from userlogin where  name=? ";
extQuery(sql,name);

try {

if(rs.next()) {
lg2=new Login();
lg2.setName(rs.getString("name"));
lg2.setPwd(rs.getString("pwd"));
lg2.setEmail(rs.getString("email"));

}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
closeAll();
return lg2;

}
}

zhuceDao.java

package com.orcl.dao;

import java.sql.SQLException;
import java.util.ArrayList;

import javax.swing.JOptionPane;

import com.login.bean.Login;
import com.xm.util.Oboperation;

public class ZhuceDao extends Oboperation{
public ArrayList zhuce(String name,String pwd,String email) {
ArrayList arr=new ArrayList();
getConn();
String sql="insert into userlogin values(?,?,?)";
extUpdate(sql, name,pwd,email);
closeAll();
return arr;
}

}


wangjiDao.java
package com.orcl.dao;

import java.util.ArrayList;

import com.xm.util.Oboperation;

public class WangjiDao extends Oboperation {
public ArrayList wangji(String name,String pwd) {
ArrayList arr=new ArrayList();
getConn();
//更新密码语句
String sql="update userlogin set pwd=? where name=?";
extUpdate(sql,pwd,name);
closeAll();
return arr;

}

}

3.service

loginservice.java
package com.xm.service;

import java.util.ArrayList;

import com.login.bean.Login;
import com.orcl.dao.loginDao;

public class LoginService {
loginDao ld=new loginDao();
// public ArrayList selLogin(String name,String pwd) {
// return ld.selLogin(name, pwd);
// }
public Login getNamePwd(String name,String pwd,String email) {
return ld.getNamePwd(name, pwd,email);
}
public Login getName(String name) {
return ld.getName(name);
}
}


zhuceservice.java

package com.xm.service;

import java.util.ArrayList;

import com.login.bean.Login;
import com.orcl.dao.ZhuceDao;

public class ZhuceService {
ZhuceDao zd=new ZhuceDao();
public ArrayList zhuce(String name,String pwd,String email) {
return zd.zhuce(name, pwd, email);

}

}

wangjiservice.java
package com.xm.service;

import java.util.ArrayList;

import com.orcl.dao.WangjiDao;

public class WangjiService {
WangjiDao wj=new WangjiDao();

public ArrayList wangji(String name,String pwd) {
return wj.wangji(name, pwd);

}
}

4.Servlet

loginServlet.java

package com.xm.servlet;

import java.io.IOException;
import java.util.ArrayList;

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.swing.JOptionPane;

import org.apache.tomcat.jni.User;

import com.login.bean.Login;
import com.orcl.dao.loginDao;
import com.xm.service.LoginService;

/**
* Servlet implementation class LoginServlet
*/
@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet {
LoginService ld=new LoginService();

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
//获取数据
String uname=request.getParameter("username");
String upwd=request.getParameter("userpwd");
String uemail=request.getParameter("email");
if(uname.equals("")||upwd.equals("")) {
JOptionPane.showMessageDialog(null, "用户名或密码不能为空！！");
request.getRequestDispatcher("login.jsp").forward(request, response);
}else {
//传递数据给LoginDao中的getNamePwd()方法
Login ln=ld.getNamePwd(uname, upwd,uemail);
//判断是否查询成功
if(ln==null) {
request.getRequestDispatcher("field.jsp").forward(request, response);
}else {
request.getRequestDispatcher("index.html").forward(request, response);
}
}

}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}

}

zhuceServlet.java
package com.xm.servlet;

import java.io.IOException;
import java.util.ArrayList;

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.swing.JOptionPane;

import com.login.bean.Login;
import com.xm.service.LoginService;
import com.xm.service.ZhuceService;

@WebServlet("/ZhuceServlet")
public class ZhuceServlet extends HttpServlet {
ZhuceService zs=new ZhuceService();
LoginService ls=new LoginService();
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");//设置编码格式
//获取表单数据
String uname=request.getParameter("zuser");
String upwd=request.getParameter("zpwd");
String uemail=request.getParameter("zemail");
Login ln=ls.getNamePwd(uname, upwd, uemail);
//判断用户名是否存在
if(ln!=null) {
JOptionPane.showMessageDialog(null, "用户名或邮箱已存在");
request.getRequestDispatcher("zhuce.jsp").forward(request, response);

}else {
//判断表单中的数据是否为空
if(uname.equals("")||upwd.equals("")||uemail.equals("")) {
JOptionPane.showMessageDialog(null, "用户名、密码或邮箱为空");
request.getRequestDispatcher("zhuce.jsp").forward(request, response);

}else {
//不为空将表单中的数据传给ZhuceDao()
ArrayList al=zs.zhuce(uname, upwd, uemail);
request.getRequestDispatcher("zhuceChenggong.jsp").forward(request, response);
}

}

//request.getRequestDispatcher("zhuceChengg
4000
ong.jsp").forward(request, response);
}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}

}


wangjiServlet.java
package com.xm.servlet;

import java.io.IOException;
import java.util.ArrayList;

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.swing.JOptionPane;

import com.login.bean.Login;
import com.xm.service.LoginService;
import com.xm.service.WangjiService;

@WebServlet("/WangjiServlet")
public class WangjiServlet extends HttpServlet {
WangjiService ws=new WangjiService();
LoginService ls=new LoginService();

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");//设置编码格式
//获取表单数据
String wuser=request.getParameter("wuser");
String wrepwd=request.getParameter("wrepwd");
//将用户名传给getName()方法
Login ln=ls.getName(wuser);
//判断数据库中用户名是否存才
if(ln!=null) {
//将表单中数据传给wangji()方法
ArrayList al=ws.wangji(wuser, wrepwd);
if(wuser.equals("")||wrepwd.equals("")) {
JOptionPane.showMessageDialog(null, "用户名或密码不可为空");
request.getRequestDispatcher("wangji.jsp").forward(request, response);

}else {
if(al!=null) {

JOptionPane.showMessageDialog(null, "修改成功");
request.getRequestDispatcher("wangji.jsp").forward(request, response);
}else {
JOptionPane.showMessageDialog(null, "修改失败");
request.getRequestDispatcher("wangji.jsp").forward(request, response);
}
}
}else {
JOptionPane.showMessageDialog(null, "用户名不存在！");
request.getRequestDispatcher("wangji.jsp").forward(request, response);

}

}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}

}

5.jsp页面

login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录窗口</title>
<script type="text/javascript" src="js/jquery-1.11.1.js"></script>
<style type="text/css">
*{
margin:0px;
padding: 0px;
}

form{
width:298px;
height:230px;
margin:36px auto 0px;
}
label{
color: black;
font-family: '宋体';
}
.u{
width: 221px;
height: 34px;
border-radius: 5px;
border: solid 1px;
border-color: #00ff8a;
margin-top: 5px;
}
.b {
width: 70px;
height: 30px;
margin-top: 16px;
margin-left: 11px;
color: blue;
background-color: #00edff;
border-radius: 6px;
}
#dl{
margin-left:85px;

}
a{

text-decoration: none;
}
</style>

</head>
<body class="bjtp">
<img alt="" src="images/loginbj.jpg" style="width: 100% ">
<form action="LoginServlet" method="post">
<label>用户名:</label><input type="text" class="u" name="username" id="user"/>
<span id="sp1"></span><br>
<label>密 码:</label><input type="password" class="u" name="userpwd" id="pwd"/><br>
<input type="submit" value="登录" class="b"/>
<a href="wangji.jsp"><input type="button" value="忘记密码" class="b"/></a>
<a href="zhuce.jsp"><input type="button" value="注册" class="b" /></a>

</form>

</body>
</html>

zhuce.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="js/jquery-1.11.1.js"></script>
<title>注册界面</title>
<style type="text/css">
*{margin:0px;
padding:0px;
}
.yh{

margin:0px auto 0px;

}
body{
background: url("images/zhuce.jpg") no-repeat;
background-size: cover;
}

form{
padding-top:200px;
}
.inp{
width:200px;
height:25px;
border:1px solid;
border-radius: 5px

}
td{
padding-top:10px;
}
.btn{
width: 87px;
height: 30px;
}
a{
text-decoration: none;
}
span{
color:red;
}
</style>

</head>
<body>
<form action="ZhuceServlet" method="post">
<h2 style="text-align: center;">用户注册</h2>
<table class="yh">
<tr>
<td>
<label>用  户  名:</label>
<input type="text" class="inp" id="user" name="zuser"/>
<span id="sp1"></span>
</td>
</tr>

<tr>
<td>
<label>密       码:</label>
<input type="password" class="inp" id="pwd" name="zpwd"/>
<span id="sp2"></span>
</td>
</tr>

<tr>
<td>
<label>重输密码:</label>
<input type="password" class="inp" id="repwd" name="repwd"/>
<span id="sp3"></span>
</td>
</tr>

<tr>
<td>
<label>邮       箱:</label>
<input type="text" class="inp" id="em" name="zemail"/>
<span id="sp4"></span>
</td>
</tr>

<tr>
<td align="center"><input type="submit" value="注册" class="btn" id="bt"/>
<a href="login.jsp"> <input type="button" value="取消" class="btn"/></a></td>
</tr>
</table>
</form>
<script type="text/javascript">

$("#user").blur(function(){
var user=$("#user").val();
var uzz=/^\w{3,20}$/;
var sp1=$("#sp1");
if(!uzz.exec(user)){
sp1.html("用户名格式错误!!");
}else{
sp1.html("");
}
});

$("#pwd").blur(function(){
var p=$("#pwd").val();
var sp2=$("#sp2");
var pzz=/\w{3,15}/;
if(!pzz.exec(p)){
sp2.html("密码格式错误！！！");
}else{
sp2.html("");
}
});

$("#repwd").blur(function(){
var rep=$("#repwd").val();
var pp=$("#pwd").val();
var sp3 =$("#sp3");

if(rep==pp){
$("#bt").attr("disabled",true);
sp3.html("");

}else{
$("#bt").attr("disabled","disabled");
sp3.html("前后不一致！");

}
});

$("#em").blur(function(){
var e=$("#em").val();
var sp4=$("#sp4");
var ezz=/\w@+[a-z]{2,3}.+\w{2,3}/;
if(!ezz.exec(e)){
sp4.html("邮箱格式错误！！！");
}else{
sp4.html("");
}
});

</script>

</body>
</html>

wangji.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>忘记密码？</title>
<style type="text/css">
*{margin:0px;
padding:0px;
}
body{
background: url("images/wangji.jpg") no-repeat;
background-size: cover;
}

a{
text-decoration: none;
}
form{
padding-top:200px;
}
.tab{
margin: 0px auto 0px;
}
label{
color:red;
}
.k{
width:200px;
height:25px;
border:1px solid;
border-radius: 5px

}
.btn{
width: 87px;
height: 30px;

margin: 10px 5px 0px 28px;
}

</style>
</head>
<body>
<form action="WangjiServlet" method="post" class="" >
<table class="tab">
<tr>
<td>
<label>请输入用户名：</label><input type="text" name="wuser" class="k"><br>
</td>
</tr>

<tr>
<td>
<label>请输入新密码：</label><input type="password" name="wrepwd" class="k"><br>
</td>
</tr>

<tr  >
<td>
<input type="submit" value="确认修改" class="btn">
<a href="login.jsp"><input type="button" value="返回" class="btn"></a>
</td>
</tr>

</table>

</form>

</body>
</html>

field.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录失败</title>
</head>
<body>
<h2>登录失败！！你将在3秒后跳转到登录界面</h2>
<%
response.setHeader("refresh", "3;URL=login.jsp");
%>

</body>
</html>

zhucechenggong.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>注册成功</title>
</head>
<body>
<h2>你将在3秒后跳转到登录界面</h2>
<%
response.setHeader("refresh", "3;URL=login.jsp");
%>

</body>
</html>