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开发环境:win10+Xmapp+PHPstorm
企业信息(企业编号,企业名称,用户名,密码,企业地址,邮箱)
用户信息(个人用户编号,用户名,密码,姓名,邮箱)
新闻信息(新闻编号,新闻标题,新闻内容,新闻图片,新闻来源,发布时间,点击次数)
招聘信息(招聘信息编号,企业用户编号,企业名称,企业类型,邮箱,电话,地址,邮政编码,工作职位,招聘人数,工作城市,工作描述,发布时间,点击次数)
个人简历信息(求职信息编号,个人用户编号,用户名,姓名,邮箱,电话,地址,邮政编码,教育程度,特长,工作类型,工作职位,工作城市,期望工资,自我介绍,发布时间,点击次数)
在线申请表(提交简历编号,个人用户编号,企业编号,姓名,企业名称,招聘单位,应聘职位)
用PHP和Xampp建立自己的服务器端,并且实现建立自己的数据库和基本表
结果如下图所示:
现在主流的DBMS一般都采用的是索引法和HASH法。其中最常用的是索引法,所以我在经常需要搜索的列和主关键字上建立了唯一的索引。
并且添加外键:
主要源码如下:
发布职位.php:
<html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>企业登录</title> <link rel="shortcut icon" href="../img/20181229051952188_easyicon_net_16.ico"> <link rel="stylesheet" href="../css/发布职位.css"> <script type="text/javascript" src="../js/jquery.js"></script> <script src="../js/发布职位.js" type="text/javascript" charset="utf-8"></script> <script src="../js/enterprise_register.js" type="text/javascript" charset="urf-8"></script> </head> <body> <div class="all"> <div class="content"> <div class="top"> <div class="first pull-left active"> 账号登陆 </div> <div class="second pull-right"> 短信快捷登陆 </div> </div> <div class="mid"> <div class="account"> <div class="ac"> <form action="account_login.php" method="post"> <div class="move pull-left clear-fix"> <img src="../img/icon-id card.png" alt="" width="20" height="20"> </div> <input class="pull-left clear-fix" name="username" type="text" placeholder="用户名"><br> <div class="move pull-left clear-fix"> <img src="../img/icon-pen.png" alt="" width="20" height="20"> </div> <input class="pull-left clear-fix" name="password" type="password" placeholder="密码"><br> <div class="move pull-left clear-fix"> <img src="../img/icon-right.png" alt="" width="20" height="20"> </div> <input class="yan pull-left clear-fix" type="text" name="captcha" placeholder="验证码"> <img class="captcha pull-right clear-fix" src="image_captcha.php" alt="" onclick="this.src='image_captcha.php?'+new Date().getTime();" width="200" height="200" ><br> <input class="log" type="submit" value="登录"> <div class="forget"> <a href="retrieve.php">密码遗失了?点这里试试</a><br> <a href="enterprise_register.php">还没有账号?来注册一个</a> </div> </form> </div> </div> <div class="phone"> <div class="ph"> <form action="phone_login.php" method="post"> <div class="move pull-left clear-fix"> <img src="../img/icon-tel.png" alt="" width="20" height="20"> </div> <input id="telephone" name="telephone" type="text" placeholder="手机号"> <div class="move pull-left clear-fix"> <img src="../img/icon-right.png" alt="" width="20" height="20"> </div> <input class="yan pull-left clear-fix" type="text" name="captcha" placeholder="验证码"> <img class="captcha pull-right clear-fix" src="image_captcha.php" alt="" onclick="this.src='image_captcha.php?'+new Date().getTime();" width="200" height="200" ><br> <div class="move pull-left clear-fix"> <img src="../img/icon-mail.png" alt="" width="20" height="20"> </div> <input name="input_message" class="other" type="text" placeholder="请输入短信验证码"> <input name="get_message" class="others" id="getCodeBtn" type="button" value="获取短信验证码" > <input class="log" type="submit" value="登录"> <div class="forget"> <a href="enterprise_register.php">还没有账号?来注册一个</a> </div> </form> </div> </div> </div> </div> </div> </body> </html>
Personal_register.php:
<head> <title>注册</title> <link rel="shortcut icon" href="../img/20181229051952188_easyicon_net_16.ico"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" href="../css/enterprise_register.css"> <script type="text/javascript" src="../js/jquery.js"></script> <script type="text/javascript" src="../js/enterprise_register.js"></script> </head> <body> <div id="all"> <div id="mid"> <form action="personal_register_action.php" method="post"> <span>姓名: </span><input type="text" class="change" name="personal_name"><br> <span>账户名: </span><input class="one" type="text" name="account_name" /><br> <span>密码: </span><input class="change" type="password" name="password" /><br> <span>重复密码: </span><input class="one" type="password" name="repeat" /><br> <span>个人地址: </span><input type="text" name="address" class="one"><br> <span>邮箱: </span><input type="text" name="email" class="change"><br> <span>手机号: </span><input class="change" type="text" name="telephone" id="telephone" /><br> <span>图片验证码:</span><input class="two" type="text" name="captcha" /><br> <img class="captcha pull-right clear-fix" src="image_captcha.php" alt="" onclick="this.src='image_captcha.php?'+new Date().getTime();" width="50" height="50" ><br> <span>手机验证码:</span><input class="two twoo" type="text" name="check_code" /><br> <input type="button" value="获取手机验证码" id="getCodeBtn" /><br> <input type="reset" value="错了重填" class="three" /> <input type="submit" value="立即注册" class="three"/><br> </form> </div> </div> </body> </html>
Enterprise_management.php:
<html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>企业管理</title> <link rel="shortcut icon" href="../img/favicon-2019010107391610.ico"> <link rel="stylesheet" href="../css/enterprise_management.css"> <script type="text/javascript" src="../js/enterprise_management.js"></script> </head> <body> <img id="tou_ming" class="pull-left clear-fix" src="../img/2b163928b263b7e4e4bb9c09ebcbd15f.jpg" alt=""> <table id="big" border="1" cellpadding="100" cellspacing="0"> <tr> <th id="one" class="active">企业资料</th> <td class="other" rowspan="5"> <div id="first"> <form action="enterprise_material.php" method="post"> <?php $servername = "localhost:3306"; $username = "root"; $password = ""; $DB_name = "db"; global $conn; $conn = new mysqli($servername, $username, $password, $DB_name); if ($conn->connect_error) { die("连接失败:" . $conn->connect_error . '\n'); } else { // echo "连接成功.\n"; } mysqli_set_charset($conn, 'utf8'); session_start(); $username = $_SESSION['username']; $sql = "select * from enterprise_info where e_username='$username'"; $result = $conn->query($sql); if ($result) { // echo "找到了该用户"; } else { // echo "没有找到该用户".$sql."<br>".$conn->error; // exit("系统出错"); } $row = mysqli_fetch_row($result); $_SESSION['name'] = $row[1]; ?> 企业名称: <?php echo "<input type=\"text\" id=\"name\" name=\"name\" value='$row[1]'>"; ?> <br/> 用户名: <?php echo "<input type=\"text\" id=\"username\" name=\"username\" value='$row[2]' readonly='readonly'>"; ?> <br/> 密码: <?php echo "<input type=\"text\" id=\"password\" name=\"password\" value='$row[3]'>"; ?> <br/> 企业地址: <?php echo "<input type=\"text\" id=\"address\" name=\"address\" value='$row[4]'>"; ?> <br/> 邮箱: <?php echo "<input type=\"text\" id=\"email\" name=\"email\" value='$row[5]'>"; ?> <input type="submit" class="change" value="确认修改"> </form> </div> <div id="second"> <form action="publish_news.php" method="post"> 标题: <?php echo "<input type=\"text\" id=\"title\" name=\"title\">"; ?> 内容: <?php echo "<input type=\"text\" id=\"content\" name=\"content\">"; ?><br> 图片: <?php echo "<input type=\"text\" id=\"picture\" name=\"picture\">"; ?> 来源: <?php echo "<input type=\"text\" id=\"resource\" name=\"resource\">"; ?><br> <input class="change" type="submit" value="确认发布"> </form> </div> <div id="third"> <form action="publish_recruit.php" method="post"> 企业名称: <?php echo "<input type=\"text\" id=\"e_name\" name=\"e_name\">"; ?> 企业类型: <?php echo "<input type=\"text\" id=\"types\" name=\"types\">"; ?> 邮箱: <?php echo "<input type=\"text\" id=\"e_email\" name=\"e_email\">"; ?><br> 电话: <?php echo "<input type=\"text\" id=\"phone\" name=\"phone\">"; ?> 地址: <?php echo "<input type=\"text\" id=\"e_address\" name=\"e_address\">"; ?> 邮政编码: <?php echo "<input type=\"text\" id=\"zip\" name=\"zip\">"; ?><br> 工作职位: <?php echo "<input type=\"text\" id=\"position\" name=\"position\">"; ?> 招聘人数: <?php echo "<input type=\"text\" id=\"count\" name=\"count\">"; ?> 工作城市: <?php echo "<input type=\"text\" id=\"city\" name=\"city\">"; ?><br> 工作描述: <?php echo "<input type=\"text\" id=\"description\" name=\"description\">"; ?> <br> <input class="change" type="submit" value="确认发布"> </form> </div> <div id="fourth"> <input type="button" value="点击查询" onclick="window.location.href='search_employment.php'"> </div> <div id="fifth"> <table cellpadding="100" cellspacing="0" border="1"> <tr id="header"> <td>姓名</td> <td>手机号</td> <td colspan="2"></td> </tr> <?php $e_name = $_SESSION['name']; $sql = "SELECT o_u_id FROM online_apply WHERE o_e_name='$e_name'"; $result = $conn->query($sql); if ($result) { if ($result->num_rows> 0) { $j = $result->num_rows; while ($j > 0) { $row=$result->fetch_row(); $u_id = $row[0]; $sql="SELECT p_u_username,p_u_phone FROM personal_resume WHERE p_u_id='$u_id'"; $res=$conn->query($sql); if($res){ $row=$res->fetch_row(); $u_username=$row[0]; $_SESSION['r_name['.$j.']']=$u_username; $u_phone=$row[1]; echo "<tr>"; echo "<td>$u_username</td>"; echo "<td>$u_phone</td>"; echo "<td><button class='changes'>接受</button></td>"; echo "<td><button class='changes refuse'>拒绝</button></td>"; echo "</tr>"; }else{ echo "系统错误"; } $j--; } }else{ echo "<script>alert('没有求职人员');</script>"; } }else{ echo "failed".$sql."<br>".$conn->error; } ?> </table> </div> </td> </tr> <tr> <th id="two">新闻发布</th> </tr> <tr> <th id="three">招聘信息发布</th> </tr> <tr> <th id="four">应聘人员信息查询</th> </tr> <tr> <th id="five">求职人员管理</th> </tr> </table> <?php $conn->close(); ?> </body> </html>
Personal_management.php:
<html> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>个人管理</title> <link rel="shortcut icon" href="../img/favicon-20190101073916688.ico"> <link rel="stylesheet" href="../css/personal_management.css"> <script type="text/javascript" src="../js/personal_management.js"></script> </head> <body> <img id="tou_ming" class="pull-left clear-fix" src="../img/2b163928b263b7e4e4bb9c09ebcbd15f.jpg" alt=""> <table border="1" cellpadding="100" cellspacing="0"> <tr> <th id="one" class="active">个人资料</th> <td class="other" rowspan="5"> <div id="first"> <form action="personal_material.php" method="post"> <?php $servername = "localhost:3306"; $username = "root"; $password = ""; $DB_name = "db"; global $conn; $conn = new mysqli($servername, $username, $password, $DB_name); if ($conn->connect_error) { die("连接失败:" . $conn->connect_error . '\n'); } else { // echo "连接成功.\n"; } mysqli_set_charset($conn,'utf8'); session_start(); $username=$_SESSION['username']; $sql="select * from user_info where u_username='$username'"; $result=$conn->query($sql); if($result){ // echo "找到了该用户"; }else{ // echo "没有找到该用户".$sql."<br>".$conn->error; // exit("系统出错"); } $row=mysqli_fetch_row($result); ?> 姓名: <?php echo "<input type=\"text\" id=\"name\" name=\"name\" value='$row[1]'>"; ?> <br/> 用户名: <?php echo "<input type=\"text\" id=\"username\" name=\"username\" value='$row[2]' readonly='readonly'>"; ?> <br/> 密码: <?php echo "<input type=\"text\" id=\"password\" name=\"password\" value='$row[3]'>"; ?> <br/> 邮箱: <?php echo "<input type=\"text\" id=\"email\" name=\"email\" value='$row[4]'>"; ?> <input type="submit" class="change" value="确认修改"> </form> </div> <div id="second"> <form action="apply_resume.php" method="post"> <?php $sql="select * from personal_resume where p_u_username='$username'"; $result=$conn->query($sql); if($result->num_rows>0){ echo "<script>alert('欢迎您'.'$username');</script>"; }else{ echo "<script>alert('请完善您的简历');</script>"; } $row=mysqli_fetch_row($result); ?> 用户名: <?php echo "<input type=\"text\" id=\"a_name\" name=\"a_name\" value='$row[2]' readonly='readonly'>"; ?> 性别: <?php echo "<input type=\"text\" id=\"sex\" name=\"sex\" value='$row[3]'>"; ?> 邮箱: <?php echo "<input type=\"text\" id=\"a_email\" name=\"a_email\" value='$row[4]'>"; ?><br> 电话: <?php echo "<input type=\"text\" id=\"phone\" name=\"phone\" value='$row[5]'>"; ?> 地址: <?php echo "<input type=\"text\" id=\"address\" name=\"address\" value='$row[6]'>"; ?> 邮政编码: <?php echo "<input type=\"text\" id=\"zip\" name=\"zip\" value='$row[7]'>"; ?><br> 教育程度: <?php echo "<input type=\"text\" id=\"education\" name=\"education\" value='$row[8]'>"; ?> 特长: <?php echo "<input type=\"text\" id=\"special\" name=\"special\" value='$row[9]'>"; ?> 工作类型: <?php echo "<input type=\"text\" id=\"types\" name=\"types\" value='$row[10]'>"; ?><br> 工作职位: <?php echo "<input type=\"text\" id=\"position\" name=\"position\" value='$row[11]'>"; ?> 工作城市: <?php echo "<input type=\"text\" id=\"city\" name=\"city\" value='$row[12]'>"; ?> 期望工资: <?php echo "<input type=\"text\" id=\"salary\" name=\"salary\" value='$row[13]'>"; ?><br> 自我介绍: <?php echo "<textarea id=\"myself\" name=\"myself\">$row[14]</textarea>"; ?> 发布时间: <?php echo "<input type=\"text\" id=\"time\" name=\"time\" value='$row[15]' readonly='readonly'>"; ?> 点击次数: <?php echo "<input type=\"text\" id=\"num\" name=\"num\" value='$row[16]' readonly='readonly'>"; ?><br> <input class="change" type="submit" value="提交简历"> </form> </div> <div id="third"> <a href="首页.php"><img src="../img/48a6fcdfa1c598f54f2d2eca3287cc78.jpg" alt="" width="100" height="100"><span>点击图片跳转进入新闻界面</span></a> </div> <div id="fourth"> <form action="search_recruit_info.php" method="post"> <input type="text" id="search" name="search" placeholder="请输入企业名称"> <input class="change" type="submit" value="搜索"> </form> </div> <div id="fifth"> <form action="online_apply.php" method="post"> 姓名: <?php echo "<input type=\"text\" id=\"o_u_name\" name=\"o_u_name\" >"; ?><br> 企业名称: <?php echo "<input type=\"text\" id=\"o_e_name\" name=\"o_e_name\">"; ?><br> 招聘职位: <?php echo "<input type=\"text\" id=\"o_e_position\" name=\"o_e_position\">"; ?><br> 应聘职位: <?php echo "<input type=\"text\" id=\"o_u_position\" name=\"o_u_position\">"; ?><br> <input class="change" type="submit" value="提交申请"> </form> </div> </td> </tr> <tr> <th id="two">求职管理</th> </tr> <tr> <th id="three">浏览新闻</th> </tr> <tr> <th id="four">招聘信息查询</th> </tr> <tr> <th id="five">提交简历申请表</th> </tr> </table> <?php $conn->close(); ?> </body> </html>
数据库运行一段时间后,由于记录不断增删改,将会使数据库的物理存储情况变坏,降低数据的存取效率,使数据库性能下降,这时数据库管理员就要对数据库进行重组织或部分重组织(只对频繁增、删的表进行重组织)。关系数据库管理系统一般都提供数据重组织的实用程序,在重组织过程中,按原设计要求重新安排存储位置、回收垃圾、减少指针链等,提高系统性能。
数据库的重组织并不修改原设计的逻辑和物理结构,而数据库的重构造是指部分修改数据库的模式和内模式。
由于数据库应用环境发生变化,增加了新的应用或新的实体,取消了某些应用,有的实体与实体间的联系也发生了变化等,使原有的数据库设计不能满足新的需求,需要调整数据库的模式和内模式。
数据库的重构也是有限的,只能做部分修改。如果应用变化太大,重构也无济于事,说明此数据库应用系统的生命周期已经结束,应该设计新的数据库应用系统了。
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