您的位置：首页 > 其它

一个很简单的用户登录设计

2014-07-17 14:01 99 查看

javaBean的代码

package bean;

import java.io.Serializable;

public class Admin implements Serializable{

/**

*

*/

private static final long serialVersionUID = 1L;

private Integer id;

private String name;

private String pass;

public Admin() {

super();

// TODO Auto-generated constructor stub

}

public Admin(Integer id, String name, String pass) {

super();

this.id = id;

this.name = name;

this.pass = pass;

}

public Integer getId() {

return id;

}

public void setId(Integer id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getPass() {

return pass;

}

public void setPass(String pass) {

this.pass = pass;

}

@Override

public String toString() {

return "AdminBean [id=" + id + ", name=" + name + ", pass=" + pass

+ "]";

}

}

dao的基础接口类

package dao;

import java.util.List;

public interface BaseDao<t, pk=""> {

/**

* 插入数据

*/

boolean insert(T entity);

/**

* 根据实体删除数据

*/

boolean delete(T entity);

/**

* 根据ID删除数据

*/

boolean deleteById(PK id);

/**

* 修改数据

*/

boolean update(T entity);

/**

* 查询所有数据

*/

List<t> findAll();

/**

* 根据ID查询数据

*/

T findById(PK id);

/**

* 根据当前页查询数据

*/

List<t> findNowPageInfo(int nowpage, int pagesize,String sortName,String sortOrder);

/**

* 返回总页数

*/

Integer getCountPage(int pagesize);

/**

* 批量删除

*/

boolean deletes(Object ids[]);

}</t></t></t,>

对admin操作的接口类,继承自basedao

package dao;

import bean.Admin;

public interface AdminDao extends BaseDao {

Admin checkLogin(String name,String pass);

Admin checkLogin(String name);

}</admin,>

?

dao操作实体的实现类

package daoImpl;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.List;

import util.JdbcUtil;

import bean.Admin;

import dao.AdminDao;

public class AdminDaoImpl implements AdminDao {

private Connection conn;

private PreparedStatement pstmt;

private ResultSet rs;

@Override

public boolean insert(Admin entity) {

return JdbcUtil.upDate("insert into admin (name,pass) values (?,?)",

new Object[] { entity.getName(), entity.getPass() });

}

@Override

public boolean delete(Admin entity) {

// TODO Auto-generated method stub

return deleteById(entity.getId());

}

@Override

public boolean deleteById(Integer id) {

// TODO Auto-generated method stub

return JdbcUtil.upDate("delete from admin where id=?",

new Object[] { id });

}

@Override

public boolean update(Admin entity) {

// TODO Auto-generated method stub

return JdbcUtil.upDate(

"update admin set name=?,pass=? where id=?",

new Object[] { entity.getName(), entity.getPass(),

entity.getId() });

}

@Override

public List findAll() {

// TODO Auto-generated method stub

return null;

}

@Override

public Admin findById(Integer id) {

// TODO Auto-generated method stub

return null;

}

@Override

public List findNowPageInfo(int nowpage, int pagesize,

String sortName, String sortOrder) {

// TODO Auto-generated method stub

return null;

}

@Override

public Integer getCountPage(int pagesize) {

// TODO Auto-generated method stub

return null;

}

@Override

public boolean deletes(Object[] ids) {

// TODO Auto-generated method stub

return false;

}

@Override

public Admin checkLogin(String name, String pass) {

// TODO Auto-generated method stub

Admin entity = null;

String sql = "select * from admin where name=? and pass=?";

conn = JdbcUtil.getConn();

try {

pstmt = conn.prepareStatement(sql);

int index = 1;

pstmt.setString(index++, name);

pstmt.setString(index++, pass);

rs = pstmt.executeQuery();

if (rs.next()) {

entity = new Admin();

entity.setId(rs.getInt("id"));

entity.setName(rs.getString("name"));

entity.setPass(rs.getString("pass"));

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} finally {

JdbcUtil.release(rs, pstmt);

}

return entity;

}

@Override

public Admin checkLogin(String name) {

Admin entity = null;

String sql = "select * from admin where name=?";

conn = JdbcUtil.getConn();

try {

pstmt = conn.prepareStatement(sql);

int index = 1;

pstmt.setString(index++, name);

rs = pstmt.executeQuery();

if (rs.next()) {

entity = new Admin();

entity.setId(rs.getInt("id"));

entity.setName(rs.getString("name"));

entity.setPass(rs.getString("pass"));

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} finally {

JdbcUtil.release(rs, pstmt);

}

return entity;

}

}</admin></admin>

?

服务器接口类,用来将操作数据库的方法与记录历史的方法或其他的方法分离开,作用是增强代码的可读性以及条理性,

package service;

import java.util.List;

public interface BaseService<t, pk=""> {

/**

* 插入数据

*/

boolean insert(T entity);

/**

* 根据实体删除数据

*/

boolean delete(T entity);

/**

* 根据ID删除数据

*/

boolean deleteById(PK id);

/**

* 修改数据

*/

boolean update(T entity);

/**

* 查询所有数据

*/

List<t> findAll();

/**

* 根据ID查询数据

*/

T findById(PK id);

/**

* 根据当前页查询数据

*/

List<t> findNowPageInfo(int nowpage, int pagesize,String sortName,String sortOrder);

/**

* 返回总页数

*/

Integer getCountPage(int pagesize);

/**

* 批量删除

*/

boolean deletes(Object ids[]);

}

package service;

import bean.Admin;

public interface AdminService extends BaseService {

Admin checkLogin(String name,String pass);

Admin checkLogin(String name);

}</admin,></t></t></t,>

实现服务器接口方法的实现类

package serviceImpl;

import java.util.List;

import dao.AdminDao;

import daoImpl.AdminDaoImpl;

import bean.Admin;

import service.AdminService;

public class AdminServiceImpl implements AdminService {

AdminDao adminDao = new AdminDaoImpl();

@Override

public boolean insert(Admin entity) {

return adminDao.insert(entity);

}

@Override

public boolean delete(Admin entity) {

return false;

}

@Override

public boolean deleteById(Integer id) {

return false;

}

@Override

public boolean update(Admin entity) {

return false;

}

@Override

public List findAll() {

return null;

}

@Override

public Admin findById(Integer id) {

return null;

}

@Override

public List findNowPageInfo(int nowpage, int pagesize,

String sortName, String sortOrder) {

return null;

}

@Override

public Integer getCountPage(int pagesize) {

return null;

}

@Override

public boolean deletes(Object[] ids) {

return false;

}

@Override

public Admin checkLogin(String name, String pass) {

Admin entity = adminDao.checkLogin(name, pass);

return entity;

}

@Override

public Admin checkLogin(String name) {

Admin entity = adminDao.checkLogin(name);

return entity;

}

}</admin></admin>

用来将页面传入的信息进行分析处理的服务器类,

package servlet;

import java.io.IOException;

import java.net.URLEncoder;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

import javax.jms.Message;

import javax.servlet.ServletException;

import javax.servlet.http.Cookie;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.sun.mail.util.BASE64DecoderStream;

import com.sun.mail.util.BASE64EncoderStream;

import service.AdminService;

import serviceImpl.AdminServiceImpl;

import sun.misc.BASE64Decoder;

import sun.misc.BASE64Encoder;

import bean.Admin;

public class AdminServlet extends HttpServlet {

private AdminService adminService = new AdminServiceImpl();

// 规定时间常量,为一天

private final int EXPIRES = 60 * 60 * 24;

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

// request.setCharacterEncoding("UTF-8");

String oper = request.getParameter("oper");

if ("adminLogin".equals(oper)) {

adminLogin(request, response);

}

if ("login".equals(oper)) {

request.getRequestDispatcher("./login.jsp").forward(request,

response);

}

}

private void adminLogin(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

//获取表单提交的数据

String name = request.getParameter("name");

String pass = request.getParameter("pass");

String mark = request.getParameter("mark");

String day = request.getParameter("day");

// System.out.println(name + "====" + pass + "====" + mark

// + "============" + day);

//根据获取的数据向数据库发送数据请求,

Admin entity = adminService.checkLogin(name, pass);

//判断查询结果

if (entity != null) {

//判断用户是否进行记录密码和自动登陆的操作

if ("mark".equals(mark)) {

// 获取当前的时间并加上要保存的时间长度

long time = System.currentTimeMillis()

+ (EXPIRES * Integer.valueOf(day)*1000);

// 声明cookie

Cookie autoCookie = null;

// 获取所有的cookie的数组

Cookie cookies[] = request.getCookies();

// 遍历判断

for (Cookie cookie : cookies) {

// 判断是否已经存在cookie记录

if ("autoLogin".equals(cookie.getName())) {

// 存在即直接赋值

autoCookie = cookie;

// 并改变内容

String newValue = name

+ ":"

+ time

+ ":"

+ md5Value(pass + ":" + name + ":" + time

+ ":donghongyujava");

autoCookie.setValue(newValue);

} else {

String cookieValue = name

+ ":"

+ time

+ ":"

+ md5Value(pass + ":" + name + ":" + time

+ ":donghongyujava");

/*

* Control character in cookie value or attribute.

* 当存入的数据是中文时,cookie会出现乱码现象需要进行编码的转换

*/

autoCookie = new Cookie("autoLogin", URLEncoder.encode(

cookieValue, "UTF-8"));

}

}

// 设置cookie的最长的存活时间

autoCookie.setMaxAge(EXPIRES * Integer.valueOf(day));

response.addCookie(autoCookie);

}

// 将admin存入到session

request.getSession().setAttribute("admin", entity);

// 设置成功后就登陆操作

request.getRequestDispatcher("./sc.jsp").forward(request, response);

} else {

request.setAttribute("msg", "用户名或密码错误请重试");

request.getRequestDispatcher("./login.jsp").forward(request,

response);

}

}

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

this.doGet(request, response);

}

//加密的操作方法

public String md5Value(String value) {

try {

// 获取md5加密的对象

MessageDigest digest = MessageDigest.getInstance("md5");

// 将传入的数据装换为byte字节,在用digest进行转换(加密)成新的字节数组,

byte result[] = digest.digest(value.getBytes());

//需要的jdk版本myeclipse2013中自带的com.sun.java.jdk.win32.x86_64_1.6.0.u43

//jdk1.7.0_25没有相关的包

BASE64Encoder encoder = new BASE64Encoder();

// 返回加密后的数据

return encoder.encode(result);

} catch (NoSuchAlgorithmException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return "";

};

}

?

过滤器类,用来设置请求的编码

package filter;

import java.io.IOException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class EncodingFilter implements Filter {

private FilterConfig filterConfig;

@Override

public void destroy() {

// TODO Auto-generated method stub

}

@Override

public void doFilter(ServletRequest req, ServletResponse res,

FilterChain chain) throws IOException, ServletException {

HttpServletRequest request = (HttpServletRequest) req;

HttpServletResponse response = (HttpServletResponse) res;

// 编码的设置

request.setCharacterEncoding(filterConfig.getInitParameter("encoding"));

chain.doFilter(request, response);

}

@Override

public void init(FilterConfig filterConfig) throws ServletException {

// TODO Auto-generated method stub

this.filterConfig=filterConfig;

}

}

自动登录的过滤类,用来控制用户的自动的登录操作的相关

package filter;

import java.io.IOException;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.Cookie;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import bean.Admin;

import service.AdminService;

import serviceImpl.AdminServiceImpl;

import sun.misc.BASE64Encoder;

public class AutoLoginFilter implements Filter {

@Override

public void destroy() {

// TODO Auto-generated method stub

}

@Override

public void doFilter(ServletRequest req, ServletResponse res,

FilterChain chain) throws IOException, ServletException {

// 强制造型为子类型

HttpServletRequest request = (HttpServletRequest) req;

HttpServletResponse response = (HttpServletResponse) res;

// 1.首先判断session

Object object = request.getSession().getAttribute("admin");

if (object != null) {

request.getRequestDispatcher("./sc.jsp").forward(request, response);

return;

}

// 2.判断cookie中是否存在用户的记录

Cookie autoCookie = null;

// 获取所有的cookie进行遍历判断

Cookie cookies[] = request.getCookies();

if (cookies != null) {

for (Cookie cookie : cookies) {

// 判断是否已经存贮用户记录

if ("autoLogin".equals(cookie.getName())) {

autoCookie = cookie;

}

}

// 判断是否存在用户自动登录记录

if (autoCookie == null) {

chain.doFilter(request, response);

return;

}

// 3.判断cookie的值

// 获取cookie值

String value = autoCookie.getValue();

// 拆分

String temps[] = value.split(":");

// 判断长度是否是自定义的长度

if (temps.length != 3) {

chain.doFilter(request, response);

return;

}

// 获取拆分后的数据

String name = temps[0];

String time = temps[1];

String service_md5Value = temps[2];

// 4.根据时间判断是否失效

if (Long.valueOf(time) <= System.currentTimeMillis()) {

chain.doFilter(request, response);

return;

}

// 5.根据用户名查询数据

AdminService adminService = new AdminServiceImpl();

// 向数据库发送数据请求

Admin entity = adminService.checkLogin(name);

if (entity == null) {

chain.doFilter(request, response);

return;

}

// 6.拼接字符串在进行二次判断,

String md5Temp = entity.getPass() + ":" + entity.getName() + ":"

+ time + "donghongyujava";

if (!(md5Value(md5Temp).equals(service_md5Value))) {

chain.doFilter(request, response);

return;

}

// 7.如果以上的判断都通过,那么就发送成功的转跳连接

request.getSession().setAttribute("admin", entity);

request.getRequestDispatcher("./sc.jsp").forward(request, response);

} else {

chain.doFilter(request, response);

return;

}

}

@Override

public void init(FilterConfig arg0) throws ServletException {

// TODO Auto-generated method stub

}

// 加密的操作函数

public String md5Value(String value) {

try {

// 获取md5加密的对象

MessageDigest digest = MessageDigest.getInstance("md5");

// 将传入的数据装换为byte字节,在用digest进行转换(加密)成新的字节数组,

byte result[] = digest.digest(value.getBytes());

BASE64Encoder encoder = new BASE64Encoder();

// 返回加密后的数据

return encoder.encode(result);

} catch (NoSuchAlgorithmException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return "";

};

}

web的配置,主要配置的是servlet和filter的配置



<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">

<display-name>jqueryeasyui</display-name>

<servlet>

<servlet-name>AdminServlet</servlet-name>

<servlet-class>servlet.AdminServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>AdminServlet</servlet-name>

<url-pattern>/AdminOPer.do</url-pattern>

</servlet-mapping>

<filter>

<filter-name>AutoLoginFilter</filter-name>

<filter-class>filter.AutoLoginFilter</filter-class>

</filter>

<filter-mapping>

<filter-name>AutoLoginFilter</filter-name>

<url-pattern>/AdminOPer.do</url-pattern>

</filter-mapping>

<filter>

<filter-name>EncodingFilter</filter-name>

<filter-class>filter.EncodingFilter</filter-class>



<init-param>

<param-name>encoding</param-name>

<param-value>UTF-8</param-value>

</init-param>

</filter>



<filter-mapping>

<filter-name>EncodingFilter</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<welcome-file-list>

<welcome-file>index.html</welcome-file>

<welcome-file>index.htm</welcome-file>

<welcome-file>index.jsp</welcome-file>

<welcome-file>default.html</welcome-file>

<welcome-file>default.htm</welcome-file>

<welcome-file>default.jsp</welcome-file>

</welcome-file-list>

</web-app>

用来跳转的jsp代码

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</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">



登录操作

要登陆的表单界面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%@include file="/common/tag.jsp"%>

<%@include file="/common/jquery.jsp"%>

<html>

<title>My JSP 'index.jsp' starting page</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">



<div>



<b>${requestScope.msg}</b>



<form action="${pageContext.request.contextPath}/AdminOPer.do" method="post">

<table border="1">

<tbody><tr>

<td>用户名:</td>

<td><input type="text" name="name"></td>

</tr>

<tr>

<td>密码:</td>

<td><input type="text" name="pass"></td>

</tr>

<tr>

<td align="right"><input type="checkBox" name="mark" value="mark"></td>

<td>下次记住密码</td>

</tr>

<tr>

<td colspan="2"><input type="radio" name="day" value="1">一天

<input type="radio" name="day" value="3">三天 <input type="radio" name="day" value="7" checked="checked">一周</td>

</tr>

<tr>

<td align="center" colspan="2"><input type="submit" value="登录" id="submit"><input type="reset" value="重置" id="reset"></td>

</tr>

</tbody></table>

<input type="hidden" value="adminLogin" name="oper">

</form>

</div>

成功登录后的界面jsp代码

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme() + "://"

+ request.getServerName() + ":" + request.getServerPort()

+ path + "/";

%>

<base href="<%=basePath%>">

<title>My JSP 'sc.jsp' starting page</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">





欢迎 <b>${sessionScope.admin.name}</b>进入

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航