JavaWEB（项目分析用户登录发布新闻）
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JavaWEB（项目分析用户登录发布新闻）
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一、驗證碼
? ?（1）為什么需要驗證碼？
? ? ? ? ? ? 隨著網絡的發達，會有些人惡意注冊網站，但是有了驗證碼之后就可以有效防止這一現象，對于網站運營商家來說，少了這些無效的注冊，也更有利于管理，降低網站運營管理的難度。
? ? ? ? ?對于用戶來說，當賬戶出現異常和高風險操作都會觸發驗證碼，驗證碼發到個人手機上，很好的保護了個人信息安全。
?第一步：定義接收驗證碼的容器
//保存驗證碼var code = "";var arr = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','l','m','o','p','q','r','s','k','u','y','w','x','y','z'];第二步 ：封裝驗證的生成方法，利用隨機數的原理，隨機出現四個數
//封裝驗證碼生成function setCode(){//清空上一次保留的驗證碼code = "";//通過Math.random();產生一個隨機數for(var i = 0;i<4;i++){/* 取范圍 乘 數組的長度個數 */var sj = Math.floor(Math.random()*arr.length);//console.log(sj)//console.log(arr[sj]); //根據隨機數獲取數組中的元素code+=arr[sj];}//獲取存儲驗證碼的span標簽$("code_val").innerHTML = code;}第三步：驗證輸入的驗證碼是否匹配
//獲取驗證碼進行匹配$("code").onblur = function(){//獲取輸入項中的驗證碼var inputCode = this.value;//獲取span標簽隨機生成保留的驗證碼var spanCode = $("code_val").innerHTML;if(!inputCode){alert('驗證碼不能為空');return false;}else{//編寫了驗證碼if(inputCode!=spanCode){alert('驗證碼輸入錯誤');this.value = "";//重新生成return false;}}return true;};第四步：重置驗證碼
/* 如果span中存儲的驗證碼不清晰 需要重新修改 */$("code_val").onclick = function(){setCode();}完整登錄的驗證碼以及表單驗證：
<%@ 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></title> <!-- 引入login.css --> <link rel="stylesheet" type="text/css" href="css/login.css"/> <!-- javascript表單驗證 --> <script type="text/javascript">var code = ""; var arr = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','l','m','o','p','q','r','s','k','u','y','w','x','y','z'];function $(id){return document.getElementById(id);}//加載函數window.onload = function(){//用戶名焦點事件$("username").onblur = function(){var usernameValue = this.value;if(!usernameValue){alert('用戶名不能為空')return false;}return true;}//密碼的焦點事件$("password").onblur = function(){var passwordValue = this.value;if(!passwordValue){alert('密碼不能為空')return false;}return true; }//阻止提交myFrom$("myFrom").onsubmit = function(){if(!$("username").onblur() || !$("password").onblur() || !$("code").onblur()){return false;}return true;}//驗證驗證碼$("code").onblur = function(){var inputCode = this.value;var spanCode = $("code_val").innerHTML;if(!inputCode){alert('驗證碼不能為空');return false;}else{if(inputCode!=spanCode){alert('驗證碼輸入錯誤');this.value = "";return false;}}return true;};setCode();//點擊更換驗證碼$("code_val").onclick = function(){setCode();}};//編寫生成驗證碼function setCode(){code = "";for(var i = 0;i<4;i++){var sj = Math.floor(Math.random()*arr.length);code+=arr[sj];}$("code_val").innerHTML = code;}</script></head><body><!-- 登錄大容器 --><div id="login"><!-- 上 --><div id="top"><div id="top_left"><img src="images/login_03.gif" /></div><div id="top_center"></div></div><!-- 中 --><div id="center"><div id="center_left"></div><div id="center_middle"><!-- 表單 --><form id="myFrom" action = "doLogin.jsp" method="post"><div id="user">用 戶<input type="text" name="username" id="username"/></div><div id="pwd">密 碼<input type="password" name="password" id="password"/></div><div id = "yzm">驗證碼 <input type ="text" name = "code" id = "code"/><span id = "code_val">okok</span></div><div id = "mdl">用戶七天免登陸哦~</div><div id="btn"><input type="submit" value="登錄" class="opt_sub" /><input type="reset" value="重置" class="opt_sub" /></div></form> </div><div id="center_right"></div></div><!-- 下 --><div id="down"><div id="down_left"><div id="inf"><span class="inf_text">版本信息</span><span class="copyright">管理信息系統 2008 v2.0</span></div></div><div id="down_center"></div></div></div></body> </html>數據庫的創建
--新聞發布系統的用戶表 create table tb_news_users ( Userid number primary key, Username varchar2(100), Password varchar2(100), Sex varchar2(2), Hobby varchar2(100), Address varchar2(100), Urole number default 1,--0 管理員 1普通用戶 Udate date ） --插入數據 insert into tb_news_users values(1,'lixiaojiu','9939','女','配音','慧木藍星',0,sysdate); insert into tb_news_users values(2,'lixiaoqi','7757','女','唱歌','水語宇星',0,sysdate); commit select * from tb_news_users;--主題表 create table tb_news_theme (Tid number(20) primary key,Tname varchar2(20) ) --插入數據 insert into tb_news_theme values(1,'國內'); insert into tb_news_theme values(2,'國際'); insert into tb_news_theme values(3,'軍事'); insert into tb_news_theme values(4,'體育'); insert into tb_news_theme values(5,'娛樂'); insert into tb_news_theme values(6,'社會'); insert into tb_news_theme values(7,'財經'); insert into tb_news_theme values(8,'房產'); insert into tb_news_theme values(9,'家居'); insert into tb_news_theme values(10,'旅游'); insert into tb_news_theme values(11,'文化'); insert into tb_news_theme values(12,'其他'); commit--新聞表 create table tb_news (nid number(20) primary key,ntid number(20) references tb_news_theme(tid),ntitle varchar2(100),nauthor varchar2(20) ,nsummary varchar2(200),ncontent varchar2(2000),nimage varchar2(100) default 'images\\1.jpg',ndate date,ncount number(10) ) --插入數據 insert into tb_news values (1,2,'阿富汗','一張張','當今局勢1?','阿富汗被美國深深地給控制住了，現在已經自身難保了……',default,sysdate,0); insert into tb_news values (2,4,'男足','全中國','男足再敗','深足教練組：說我們買球是侮辱， 球員:遺憾主場放跑國安 ',default,sysdate,0); insert into tb_news values (3,10,'氣候','甜菜菜','氣候變化該如何','氣候變化導致海平面上升 ',default,sysdate,0); insert into tb_news values (4,12,'霸總的日常','如糯糯','2022熱烈來襲','女主帶球跑1霸總追回99次',default,sysdate,0);commit;select * from tb_news_theme select * from tb_news??登錄界面呈現
<%@ 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></title> <!-- 引入login.css --> <link rel="stylesheet" type="text/css" href="css/login.css"/> <!-- javascript表單驗證 --> <script type="text/javascript">var code = ""; var arr = ['0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','l','m','o','p','q','r','s','k','u','y','w','x','y','z'];function $(id){return document.getElementById(id);}//加載函數window.onload = function(){//用戶名焦點事件$("username").onblur = function(){var usernameValue = this.value;if(!usernameValue){alert('用戶名不能為空')return false;}return true;}//密碼的焦點事件$("password").onblur = function(){var passwordValue = this.value;if(!passwordValue){alert('密碼不能為空')return false;}return true; }//阻止提交myFrom$("myFrom").onsubmit = function(){if(!$("username").onblur() || !$("password").onblur() || !$("code").onblur()){return false;}return true;}//驗證驗證碼$("code").onblur = function(){var inputCode = this.value;var spanCode = $("code_val").innerHTML;if(!inputCode){alert('驗證碼不能為空');return false;}else{if(inputCode!=spanCode){alert('驗證碼輸入錯誤');this.value = "";return false;}}return true;};setCode();//點擊更換驗證碼$("code_val").onclick = function(){setCode();}};//編寫生成驗證碼function setCode(){code = "";for(var i = 0;i<4;i++){var sj = Math.floor(Math.random()*arr.length);code+=arr[sj];}$("code_val").innerHTML = code;}</script></head><body><!-- 登錄大容器 --><div id="login"><!-- 上 --><div id="top"><div id="top_left"><img src="images/login_03.gif" /></div><div id="top_center"></div></div><!-- 中 --><div id="center"><div id="center_left"></div><div id="center_middle"><!-- 表單 --><form id="myFrom" action = "doLogin.jsp" method="post"><div id="user">用 戶<input type="text" name="username" id="username"/></div><div id="pwd">密 碼<input type="password" name="password" id="password"/></div><div id = "yzm">驗證碼 <input type ="text" name = "code" id = "code"/><span id = "code_val">okok</span></div><div id = "mdl">用戶七天免登陸哦~</div><div id="btn"><input type="submit" value="登錄" class="opt_sub" /><input type="reset" value="重置" class="opt_sub" /></div></form> </div><div id="center_right"></div></div><!-- 下 --><div id="down"><div id="down_left"><div id="inf"><span class="inf_text">版本信息</span><span class="copyright">管理信息系統 2008 v2.0</span></div></div><div id="down_center"></div></div></div></body> </html>與數據庫進行驗證
<%@page import="java.sql.DriverManager"%> <%@page import="java.sql.Connection"%> <%@page import="java.sql.PreparedStatement"%> <%@page import="java.sql.ResultSet"%> <%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%//編碼request.setCharacterEncoding("utf-8");//獲取表單提交的值String username = request.getParameter("username");String password = request.getParameter("password");//數據庫String uname = "";String pwd = "";Class.forName("oracle.jdbc.driver.OracleDriver");String url = "jdbc:oracle:thin:@localhost:1521:orcl";Connection conn = DriverManager.getConnection(url, "scott", "123");String sql = "select * from tb_news_users where username = ? and password = ?";PreparedStatement ps = conn.prepareStatement(sql);ps.setString(1,username);ps.setString(2,password);ResultSet rs = ps.executeQuery();if(rs.next()){uname = rs.getString(1);pwd = rs.getString(2);}//驗證if(""!=uname && ""!=pwd){request.getRequestDispatcher("admin.jsp").forward(request, response);}else{response.sendRedirect("login.jsp");}%>??① 增加界面布局
<%@ 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>Insert title here</title> <link rel="stylesheet" type="text/css" href="css/admin.css" /></head><body><div id="header"><div id="welcome">歡迎使用新聞管理系統！</div><div id="nav"><div id="logo"><img src="images/logo.jpg" alt="新聞中國" /></div><div id="a_b01"><img src="images/a_b01.gif" alt="" /></div></div></div><div id="admin_bar"><div id="status">管理員： 登錄     <a href="#">退出</a></div><div id="channel"> </div></div><div id="main"><div id="opt_list"><ul><li><a href="admin.html">管 理 首 頁</a></li><li><a href="admin_addNews.html">新 聞 發 布</a></li><li><a href="admin_themeMaintain.html">主 題 維 護</a></li><li><a style="color: red;" href="#">系統賬號管理</a></li><li><a style="color: red;" href="#">注冊用戶管理</a></li></ul></div><div id="opt_area"><h1 id="opt_type"> 添加新聞： </h1><form action="doAddNews.jsp" method="post"><p><label> 主題 </label><select name="ntid"><option value="1">國內</option><option value="2">國際</option><option value="3">旅游</option><option value="4">娛樂</option><option value="5">體育</option></select></p><p><label> 標題 </label><input name="ntitle" type="text" class="opt_input" /></p><p><label> 作者 </label><input name="nauthor" type="text" class="opt_input" /></p><p><label> 摘要 </label><textarea name="nsummary" cols="40" rows="3"></textarea></p><p><label> 內容 </label><textarea name="ncontent" cols="70" rows="10"></textarea></p><p><label> 上傳圖片 </label><input name="file" type="file" class="opt_input" /></p><input name="action" type="hidden" value="addnews"><input type="submit" value="提交" class="opt_sub" /><input type="reset" value="重置" class="opt_sub" /></form></div></div><div id="site_link"> <a href="#">關于我們</a><span>|</span> <a href="#">Aboue Us</a><span>|</span> <a href="#">聯系我們</a><span>|</span><a href="#">廣告服務</a><span>|</span> <a href="#">供稿服務</a><span>|</span> <a href="#">法律聲明</a><span>|</span> <a href="#">招聘信息</a><span>|</span><a href="#">網站地圖</a><span>|</span> <a href="#">留言反饋</a> </div><div id="footer"><p class="">24小時客戶服務熱線：010-68988888      <a href="#">常見問題解答</a>     新聞熱線：010-627488888<br />文明辦網文明上網舉報電話：010-627488888      舉報郵箱：<a href="#">jubao@jb-aptech.com.cn</a></p><p class="copyright">Copyright © 1999-2009 News China gov, All Right Reserver<br />新聞中國 版權所有</p></div></body> </html>?② 與數據庫進行交互
<%@page import="java.sql.DriverManager"%> <%@page import="java.sql.Connection"%> <%@page import="java.sql.PreparedStatement"%> <%@page import="java.sql.ResultSet"%> <%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%//編碼request.setCharacterEncoding("utf-8");//數據庫int nid = 0;Class.forName("oracle.jdbc.driver.OracleDriver");String url = "jdbc:oracle:thin:@localhost:1521:orcl";Connection conn = DriverManager.getConnection(url, "scott", "123");String sql = "select nvl(max(nid),0) from tb_news";PreparedStatement ps = conn.prepareStatement(sql);ResultSet rs = ps.executeQuery();if(rs.next()){nid = rs.getInt(1)+1;}String tid = request.getParameter("ntid");int ntid = Integer.valueOf(tid);String ntitle = request.getParameter("ntitle");String nauthor = request.getParameter("nauthor");String nsummary = request.getParameter("nsummary");String ncontent = request.getParameter("ncontent");//新增新聞sql = "insert into tb_news(nid,ntid,ntitle,nauthor,nsummary,ncontent,ndate,ncount) values (?,?,?,?,?,?,sysdate,0)";ps = conn.prepareStatement(sql);ps.setInt(1, nid);ps.setInt(2,ntid);ps.setString(3,ntitle);ps.setString(4,nauthor);ps.setString(5,nsummary);ps.setString(6,ncontent);int n = ps.executeUpdate();if(n>0){out.print("<script>alert('發布成功');location.href='admin.jsp'</script>");}else{out.print("<script>alert('發布失敗');location.href='add_news.jsp'</script>");}%>總結
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