java_web用户的自动登录模块的实现

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javaBean的代码

package bean;

import java.io.Serializable;

public class Admin implementsSerializable{

   

    /**

     *

     */

    privatestatic final long serialVersionUID = 1L;

    privateInteger id;

    privateString name;

    privateString pass;

    publicAdmin() {

        super();

        // TODO Auto-generated constructor stub

    }

    publicAdmin(Integer id, String name, String pass) {

        super();

        this.id = id;

        this.name = name;

        this.pass = pass;

    }

    publicInteger getId() {

        return id;

    }

    publicvoid setId(Integer id) {

        this.id = id;

    }

    publicString getName() {

        return name;

    }

    publicvoid setName(String name) {

        this.name = name;

    }

    publicString getPass() {

        return pass;

    }

    publicvoid setPass(String pass) {

        this.pass = pass;

    }

    @Override

    publicString toString() {

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

               + "]";

    }

}

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dao的基础接口类

package dao;

import java.util.List;

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

    /**

     * 插入数据

     */

    booleaninsert(T entity);

    /**

     * 根据实体删除数据

     */

    booleandelete(T entity);

    /**

     * 根据ID删除数据

     */

    booleandeleteById(PK id);

    /**

     * 修改数据

     */

    booleanupdate(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(intnowpage, int pagesize,String sortName,String sortOrder);

    /**

     * 返回总页数

     */

    Integer getCountPage(intpagesize);

    /**

     * 批量删除

     */

    booleandeletes(Object ids[]);

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

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对admin操作的接口类,继承自basedao

package dao;

import bean.Admin;

public interface AdminDao extendsBaseDao {

    Admin checkLogin(String name,String pass);

    Admin checkLogin(String name);

   

}</admin,>

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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 implementsAdminDao {

    privateConnection conn;

    privatePreparedStatement pstmt;

    privateResultSet rs;

    @Override

    publicboolean insert(Admin entity) {

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

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

    }

    @Override

    publicboolean delete(Admin entity) {

        // TODO Auto-generated method stub

        return deleteById(entity.getId());

    }

    @Override

    publicboolean deleteById(Integer id) {

        // TODO Auto-generated method stub

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

               new Object[] { id });

    }

    @Override

    publicboolean 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

    publicList findAll() {

        // TODO Auto-generated method stub

        return null;

    }

    @Override

    publicAdmin findById(Integer id) {

        // TODO Auto-generated method stub

        return null;

    }

    @Override

    publicList findNowPageInfo(intnowpage, int pagesize,

            String sortName, String sortOrder) {

        // TODO Auto-generated method stub

        return null;

    }

    @Override

    publicInteger getCountPage(intpagesize) {

        // TODO Auto-generated method stub

        return null;

    }

    @Override

    publicboolean deletes(Object[] ids) {

        // TODO Auto-generated method stub

        return false;

    }

    @Override

    publicAdmin 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 = newAdmin();

               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

    publicAdmin 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 = newAdmin();

               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>

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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

     */

    booleaninsert(T entity);

    /**

     * 根据实体删除数据

     */

    booleandelete(T entity);

    /**

     * 根据ID删除数据

     */

    booleandeleteById(PK id);

    /**

     * 修改数据

     */

    booleanupdate(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(intnowpage, int pagesize,String sortName,String sortOrder);

    /**

     * 返回总页数

     */

    Integer getCountPage(intpagesize);

    /**

     * 批量删除

     */

    booleandeletes(Object ids[]);

}

packageservice;

import bean.Admin;

public interface AdminService extendsBaseService {

    Admin checkLogin(String name,String pass);

    Admin checkLogin(String name);

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

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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 implementsAdminService {

    AdminDao adminDao =new AdminDaoImpl();

    @Override

    publicboolean insert(Admin entity) {

        return adminDao.insert(entity);

    }

    @Override

    publicboolean delete(Admin entity) {

        return false;

    }

    @Override

    publicboolean deleteById(Integer id) {

        return false;

    }

    @Override

    publicboolean update(Admin entity) {

        return false;

    }

    @Override

    publicList findAll() {

        return null;

    }

    @Override

    publicAdmin findById(Integer id) {

        return null;

    }

    @Override

    publicList findNowPageInfo(intnowpage, int pagesize,

            String sortName, String sortOrder) {

        return null;

    }

    @Override

    publicInteger getCountPage(intpagesize) {

        return null;

    }

    @Override

    publicboolean deletes(Object[] ids) {

        return false;

    }

    @Override

    publicAdmin checkLogin(String name, String pass) {

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

        return entity;

    }

    @Override

    publicAdmin checkLogin(String name) {

        Admin entity = adminDao.checkLogin(name);

        return entity;

    }

}</admin></admin>

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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 extendsHttpServlet {

    privateAdminService adminService = newAdminServiceImpl();

    // 规定时间常量,为一天

    privatefinal int EXPIRES =  60 * 60 * 24;

    publicvoid 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);

        }

    }

    privatevoid adminLogin(HttpServletRequest request,

            HttpServletResponse response) throwsServletException, 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 = newCookie("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);

        }

    }

    publicvoid doPost(HttpServletRequest request, HttpServletResponse response)

            throws ServletException, IOException {

        this.doGet(request, response);

    }

    //加密的操作方法

    publicString 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 = newBASE64Encoder();

            // 返回加密后的数据

            return encoder.encode(result);

        } catch (NoSuchAlgorithmException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return "";

    };

}

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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 implementsFilter {

    privateFilterConfig filterConfig;

    @Override

    publicvoid destroy() {

        // TODO Auto-generated method stub

    }

    @Override

    publicvoid doFilter(ServletRequest req, ServletResponse res,

            FilterChain chain) throwsIOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) req;

        HttpServletResponse response = (HttpServletResponse) res;

        // 编码的设置

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

        chain.doFilter(request, response);

    }

    @Override

    publicvoid init(FilterConfig filterConfig)throws ServletException {

        // TODO Auto-generated method stub

        this.filterConfig=filterConfig;

    }

}

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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 implementsFilter {

    @Override

    publicvoid destroy() {

        // TODO Auto-generated method stub

    }

    @Override

    publicvoid doFilter(ServletRequest req, ServletResponse res,

            FilterChain chain) throwsIOException, 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 = newAdminServiceImpl();

            // 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

    publicvoid init(FilterConfig arg0)throws ServletException {

        // TODO Auto-generated method stub

    }

    // 加密的操作函数

    publicString 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 = newBASE64Encoder();

            // 返回加密后的数据

            return encoder.encode(result);

        } catch (NoSuchAlgorithmException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return "";

    };

}

?

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web的配置,主要配置的是servlet和filter的配置

<?xml version="1.0"encoding="UTF-8"?>

<?XML:NAMESPACE PREFIX = [default] http://java.sun.com/xml/ns/javaee NS = "http://java.sun.com/xml/ns/javaee" /><web-app id="WebApp_ID" xmlns="http://java.sun.com/xml/ns/javaee" version="3.0" xsi:schemaLocation="http://java.sun.com/xml/ns/javaeehttp://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

    <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>

        <!-- 设置传入的参数是UTF-8-->

        <init-param>

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

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

        </init-param>

    </filter>

    <!-- 设置所有的请求操作都进行这个过滤的操作 -->

    <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>

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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 content="no-cache"http-equiv="pragma">

    <meta content="no-cache"http-equiv="cache-control">

    <meta content="0"http-equiv="expires">   

    <meta content="keyword1,keyword2,keyword3"http-equiv="keywords">

    <meta content="This is my page"http-equiv="description">

    <!--

    <link rel="stylesheet"type="text/css" href="styles.css">

    -->

 

 

 

   登录操作

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要登陆的表单界面

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

<%@includefile="/common/tag.jsp"%>

<%@includefile="/common/jquery.jsp"%>

<html>

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

<meta content="no-cache"http-equiv="pragma">

<meta content="no-cache"http-equiv="cache-control">

<meta content="0"http-equiv="expires">

<meta content="keyword1,keyword2,keyword3"http-equiv="keywords">

<meta content="This is my page"http-equiv="description">

<!--

    <link rel="stylesheet"type="text/css" href="styles.css">

    -->

    <div>

        <!-- 登录错误时的提示操作 -->

        <b>${requestScope.msg}</b>

        <!-- ${pageContext.request.contextPath}代表当前项目路径下的操作 -->

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

            <table border="1">

               <tbody><tr>

                   <td>用户名:</td>

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

               </tr>

               <tr>

                   <td>密码:</td>

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

               </tr>

               <tr>

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

                   <td>下次记住密码</td>

               </tr>

               <tr>

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

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

               </tr>

               <tr>

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

               </tr>

            </tbody></table>

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

        </form>

    </div>

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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 content="no-cache"http-equiv="pragma">

<meta content="no-cache"http-equiv="cache-control">

<meta content="0"http-equiv="expires">

<meta content="keyword1,keyword2,keyword3"http-equiv="keywords">

<meta content="This is my page"http-equiv="description">

<!--

    <link rel="stylesheet"type="text/css" href="styles.css">

    -->

<!-- 从session域中取出已经存入的用户对象 -->

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