java 自動登陸代碼

javaBean的代碼    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的基礎接口類    package dao;    import java.util.List;    public interface BaseDao<T, PK> {      /**       * 插入數據       */      boolean insert(T entity);         /**       * 根據實體刪除數據       */      boolean delete(T entity);         /**       * 根據ID刪除數據       */      boolean deleteById(PK id);         /**       * 修改數據       */      boolean update(T entity);         /**       * 查詢全部數據       */      List<T> findAll();         /**       * 根據ID查詢數據       */      T findById(PK id);         /**       * 根據當前頁查詢數據       */      List<T> findNowPageInfo( int nowpage, int pagesize,String sortName,String sortOrder);         /**       * 返回總頁數       */      Integer getCountPage( int pagesize);         /**       * 批量刪除       */         boolean deletes(Object ids[]);    }

 

對admin操做的接口類,繼承自basedao    package dao;    import bean.Admin;    public interface AdminDao extends BaseDao {      Admin checkLogin(String name,String pass);      Admin checkLogin(String name);        }

dao操做實體的實現類    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;      }    }

 

服務器接口類,用來將操做數據庫的方法與記錄歷史的方法或其餘的方法分離開,做用是加強代碼的可讀性以及條理性,    package service;    import java.util.List;    public interface BaseService<T, PK> {      /**       * 插入數據       */      boolean insert(T entity);         /**       * 根據實體刪除數據       */      boolean delete(T entity);         /**       * 根據ID刪除數據       */      boolean deleteById(PK id);         /**       * 修改數據       */      boolean update(T entity);         /**       * 查詢全部數據       */      List<T> findAll();         /**       * 根據ID查詢數據       */      T findById(PK id);         /**       * 根據當前頁查詢數據       */      List<T> findNowPageInfo( int nowpage, int pagesize,String sortName,String sortOrder);         /**       * 返回總頁數       */      Integer getCountPage( int pagesize);         /**       * 批量刪除       */         boolean deletes(Object ids[]);    }    package service;    import bean.Admin;    public interface AdminService extends BaseService {      Admin checkLogin(String name,String pass);      Admin checkLogin(String name); }

實現服務器接口方法的實現類    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;      }    }

用來將頁面傳入的信息進行分析處理的服務器類, 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();         // 規定時間常量,爲一天      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 {                     //獲取表單提交的數據          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);             //根據獲取的數據向數據庫發送數據請求,          Admin entity = adminService.checkLogin(name, pass);             //判斷查詢結果          if (entity != null ) {              //判斷用戶是否進行記錄密碼和自動登錄的操做              if ( "mark" .equals(mark)) {                  // 獲取當前的時間並加上要保存的時間長度                  long time = System.currentTimeMillis()                          + (EXPIRES * Integer.valueOf(day)* 1000 );                     // 聲明cookie                  Cookie autoCookie = null ;                  // 獲取全部的cookie的數組                  Cookie cookies[] = request.getCookies();                  // 遍歷判斷                  for (Cookie cookie : cookies) {                      // 判斷是否已經存在cookie記錄                      if ( "autoLogin" .equals(cookie.getName())) {                          // 存在即直接賦值                          autoCookie = cookie;                          // 並改變內容                          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.                           * 當存入的數據是中文時,cookie會出現亂碼現象 須要進行編碼的轉換                           */                          autoCookie = new Cookie( "autoLogin" , URLEncoder.encode(                                  cookieValue, "UTF-8" ));                      }                  }                  // 設置cookie的最長的存活時間                  autoCookie.setMaxAge(EXPIRES * Integer.valueOf(day));                  response.addCookie(autoCookie);              }              // 將admin存入到session              request.getSession().setAttribute( "admin" , entity);              // 設置成功後就登錄操做              request.getRequestDispatcher( "./sc.jsp" ).forward(request, response);          } else {                             request.setAttribute( "msg" , "用戶名或密碼錯誤請重試" );              request.getRequestDispatcher( "./login.jsp" ).forward(request,                      response);          }      }         public void doPost(HttpServletRequest request, HttpServletResponse response)              throws ServletException, IOException {          this .doGet(request, response);      }         //加密的操做方法      public String md5Value(String value) {          try {              // 獲取md5加密的對象              MessageDigest digest = MessageDigest.getInstance( "md5" );              // 將傳入的數據裝換爲byte字節,在用digest進行轉換(加密)成新的字節數組,              byte result[] = digest.digest(value.getBytes());              //須要的jdk版本myeclipse2013中自帶的com.sun.java.jdk.win32.x86_64_1.6.0.u43              //jdk1.7.0_25沒有相關的包              BASE64Encoder encoder = new BASE64Encoder();              // 返回加密後的數據              return encoder.encode(result);          } catch (NoSuchAlgorithmException e) {              // TODO Auto-generated catch block              e.printStackTrace();          }          return "" ;      };    }

 

過濾器類,用來設置請求的編碼 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;          // 編碼的設置          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;      }    }

自動登陸的過濾類,用來控制用戶的自動的登陸操做的相關    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 {          // 強制造型爲子類型          HttpServletRequest request = (HttpServletRequest) req;          HttpServletResponse response = (HttpServletResponse) res;          // 1.首先判斷session          Object object = request.getSession().getAttribute( "admin" );             if (object != null ) {              request.getRequestDispatcher( "./sc.jsp" ).forward(request, response);              return ;          }             // 2.判斷cookie中是否存在用戶的記錄          Cookie autoCookie = null ;          // 獲取全部的cookie進行遍歷判斷          Cookie cookies[] = request.getCookies();          if (cookies != null ) {              for (Cookie cookie : cookies) {                  // 判斷是否已經存貯用戶記錄                  if ( "autoLogin" .equals(cookie.getName())) {                      autoCookie = cookie;                  }              }                 // 判斷是否存在用戶自動登陸記錄              if (autoCookie == null ) {                  chain.doFilter(request, response);                  return ;              }                 // 3.判斷cookie的值              // 獲取cookie值              String value = autoCookie.getValue();              // 拆分              String temps[] = value.split( ":" );                 // 判斷長度是不是自定義的長度              if (temps.length != 3 ) {                  chain.doFilter(request, response);                  return ;              }              // 獲取拆分後的數據              String name = temps[ 0 ];                             String time = temps[ 1 ];                             String service_md5Value = temps[ 2 ];                 // 4.根據時間判斷是否失效              if (Long.valueOf(time) <= System.currentTimeMillis()) {                  chain.doFilter(request, response);                  return ;              }                 // 5.根據用戶名查詢數據              AdminService adminService = new AdminServiceImpl();              // 向數據庫發送數據請求              Admin entity = adminService.checkLogin(name);              if (entity == null ) {                  chain.doFilter(request, response);                  return ;              }                 // 6.拼接字符串在進行二次判斷,              String md5Temp = entity.getPass() + ":" + entity.getName() + ":"                      + time + "donghongyujava" ;              if (!(md5Value(md5Temp).equals(service_md5Value))) {                  chain.doFilter(request, response);                  return ;              }                 // 7.若是以上的判斷都經過,那麼就發送成功的轉跳鏈接              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         }         // 加密的操做函數      public String md5Value(String value) {          try {              // 獲取md5加密的對象              MessageDigest digest = MessageDigest.getInstance( "md5" );              // 將傳入的數據裝換爲byte字節,在用digest進行轉換(加密)成新的字節數組,              byte result[] = digest.digest(value.getBytes());              BASE64Encoder encoder = new BASE64Encoder();              // 返回加密後的數據              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 <?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/javaee http://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 >          <!-- 設置傳入的參數是UTF- 8 -->          <init-param>              <param-name>encoding</param-name>              <param-value>UTF- 8 </param-value>          </init-param>      </filter>         <!-- 設置全部的請求操做都進行這個過濾的操做 -->      <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>

 

用來跳轉的jsp代碼 <%@ page language= "java" import = "java.util.*" pageEncoding= "UTF-8" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+ "://" +request.getServerName()+ ":" +request.getServerPort()+path+ "/" ; %>       <HTML>    <HEAD>      <BASE href= "<%=basePath%>" >                           <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" >      -->                       登陸操做

 

要登錄的表單界面 <%@ page language= "java" import = "java.util.*" pageEncoding= "UTF-8" %>    <% @include file= "/common/tag.jsp" %> <% @include file= "/common/jquery.jsp" %>          <html> <HEAD>       <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>          <!-- 登陸錯誤時的提示操做 -->          <B>${requestScope.msg}</B>          <!-- ${pageContext.request.contextPath}表明當前項目路徑下的操做 -->          <FORM method=post action=${pageContext.request.contextPath}/AdminOPer. do >              <TABLE border= 1 ><TBODY><TR><TD>用戶名:</TD><TD><INPUT type=text name=name></TD></TR><TR><TD>密碼:</TD><TD><INPUT type=text name=pass></TD></TR><TR><TD align=right><INPUT value=mark type=checkbox name=mark></TD><TD>下次記住密碼</TD></TR><TR><TD colSpan= 2 ><INPUT value= 1 type=radio name=day>一天                          <INPUT value= 3 type=radio name=day>三天 <INPUT value= 7 CHECKED type=radio name=day>一週</TD></TR><TR><TD colSpan= 2 align=middle><INPUT id=submit value=登陸 type=submit><INPUT id=reset value=重置 type=reset></TD></TR></TBODY></TABLE>              <INPUT value=adminLogin type=hidden name=oper>          </FORM>      </DIV>

 

成功登陸後的界面jsp代碼    <%@ page language= "java" import = "java.util.*" pageEncoding= "UTF-8" %> <%      String path = request.getContextPath();      String basePath = request.getScheme() + "://"              + request.getServerName() + ":" + request.getServerPort()              + path + "/" ; %>       <HTML> <HEAD> <BASE href= "<%=basePath%>" >          <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" >      -->             <!-- 從session域中取出已經存入的用戶對象 -->      歡迎  <B>${sessionScope.admin.name}</B>進入