后台
<!-- 功能1：实现admin.jsp页面中新闻管理模块----模糊查询的搜索功能（根据标题进行模糊查询） -->
<!--
注意：在没有学习servlet时，模糊查询都是本页面
-->
<div
style="width: 100%; height: 40px; text-align: center; line-height: 40px;">
<form action="admin.jsp" method="post">
<label>新闻标题</label>
<!-- autocomplete 关闭自动提示 -->
<input type="text" name="strName" autocomplete="off" /> <input
type="submit" value="搜索" />
</form>
</div>
<%
//1.运行admin.jsp之后，默认显示所有新闻。
//2.在输入框中输入关键词点击搜索 跳转到本页面
//通过request内置对象获取当前模糊查询表单提交的关键词
//编码设置
request.setCharacterEncoding("utf-8");
String strName = request.getParameter("strName");
//搜索的关键词为中文 获取时会出现乱码 通过String类进行编码和解码（得到我们看得懂的中文）
System.out.println("模糊查询的关键词为:[解决前] " + strName);
//sql语句
String sql = "select * from tb_news";
//第一次运行admin.jsp strName为null 不能调用任何方法
if (null != strName) {
//new String(strName.getBytes("ISO-8859-1"),"utf-8");
//将指定编码的字符串进行解码 通过getBytes("编码") 构造函数new String()编码
strName = new String(strName.getBytes("ISO-8859-1"), "utf-8");
//强调 电脑 有些电脑不需要第82行代码。
//sql语句拼接模糊查询
sql += " where ntitle like '%" + strName + "%'";
}
System.out.println("模糊查询的关键词为:[解决后] " + strName);
System.out.println("模糊查询的关键词为:[sql] " + sql);
%>
实现效果：
前台
代码如下:
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.PreparedStatement"%>
<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.Connection"%>
<%@ 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>新闻首页</title>
<link rel="stylesheet" type="text/css" href="admin/css/main.css" />
</head>
<body>
<div id="header">
<div id="top_login">
<span style="font-size: 14px; cursor: pointer; font-weight: bold;">卓京教育新闻网首页</span>
【<a href="">请注册</a>】
<%
request.setCharacterEncoding("utf-8");
//获取usernmae
String username = request.getParameter("username");
if (null != username) {
out.println("<span>欢迎你回来! " + username + "</span>");
} else {
out.println("【<a href = 'newlogin.jsp'>登录</a>】");
}
%>
<img src="admin/images/friend_logo.gif" alt="Google" id="friend_logo" />
</div>
<div id="nav">
<div id="logo">
<img src="admin/images/logo.jpg" alt="新闻中国" />
</div>
<div id="a_b01">
<img src="admin/images/a_b01.gif" alt="" />
</div>
<!--mainnav end-->
</div>
</div>
<div id="container">
<div class="sidebar">
<h1>
<img src="admin/images/title_1.gif" alt="国内新闻" />
</h1>
<div class="side_list">
<ul>
<li><a href='#'><b> 重庆涉黑富豪黎强夫妇庭审答辩言辞相互矛盾 </b></a></li>
<li><a href='#'><b> 发改委：4万亿投资计划不会挤占民间投资空间 </b></a></li>
<li><a href='#'><b> 河南2个乡镇政绩报告内容完全一致引关注 </b></a></li>
</ul>
</div>
<h1>
<img src="admin/images/title_2.gif" alt="国际新闻" />
</h1>
<div class="side_list">
<ul>
<li><a href='#'><b> 日本首相鸠山首次全面阐述新政府外交政策 </b></a></li>
<li><a href='#'><b> 黎巴嫩以色列再次交火互射炮弹 </b></a></li>
<li><a href='#'><b> 伊朗将于30日前就核燃料供应方案作出答复 </b></a></li>
<li><a href='#'><b> 与基地有关组织宣称对巴格达连环爆炸负责 </b></a></li>
</ul>
</div>
<h1>
<img src="admin/images/title_3.gif" alt="娱乐新闻" />
</h1>
<div class="side_list">
<ul>
<li><a href='#'><b> 施瓦辛格启动影视业回迁计划 推进加州经济复苏 </b></a></li>
<li><a href='#'><b> 《沧海》导演回应观众质疑 自信能超越《亮剑》 </b></a></li>
<li><a href='#'><b> 《海角七号》导演新片开机 吴宇森等出席 </b></a></li>
<li><a href='#'><b> 《四大名捕》敦煌热拍 八主演飙戏火花四溅 </b></a></li>
</ul>
</div>
</div>
<div class="main">
<div class="class_type">
<img src="admin/images/class_type.gif" alt="新闻中心" />
</div>
<div class="content">
<!-- 3.index.jsp用户首页的新闻分类显示（数据绑定） -->
<ul class="class_date">
<li id='class_month'><a href="index.jsp"><b> 全部 </b></a>
<%
//加载驱动
Class.forName("oracle.jdbc.driver.OracleDriver");
//建立连接
String url = "jdbc:oracle:thin:@localhost:1521:orcl";
Connection conn = DriverManager.getConnection(url, "scott", "123");
//sql
String sql = "select * from tb_news_theme";
PreparedStatement ps = conn.prepareStatement(sql);
ResultSet rs = ps.executeQuery();
//sql select count(*) from tb_news_theme
int count = 1;
while (rs.next()) {
count++;
out.println("<a href='index.jsp?username=" + username + "&ntid=" + rs.getInt(1) + "'><b> "
+ rs.getString(2) + " </b></a> ");
//11 就是总记录数
if (count % 11 == 0) {
out.println("<br/>");
}
}
%></li>
</ul>
<!-- 当进入index.jsp页面后，手动点击对应的主题名称 跳转到本页面 获取当前点击的主题名称 -->
<%
username = request.getParameter("username");
String tid = request.getParameter("ntid");
if (null != tid) {//说明点击了主题分类
//根据点击的主题分类进行查询 where 条件
sql = "select * from tb_news where ntid = " + Integer.valueOf(tid);
} else {//第一次进来，没有点击主题分类
sql = "select * from tb_news";//查询所有新闻
}
%>
<!-- 新闻显示 start-->
<ul class="classlist">
<%
//sql
ps = conn.prepareStatement(sql);
rs = ps.executeQuery();
while (rs.next()) {
out.println("<li><a href='newRead.jsp?username=" + username + "&nid=" + rs.getInt(1) + "'> "
+ rs.getString(3) + " </a><span> " + rs.getString(8) + " </span></li>");
}
%>
</ul>
</div>
<div class="picnews">
<ul>
<li><a href="#"><img src="admin/images/Picture1.jpg"
width="249" alt="" /> </a><a href="#">幻想中穿越时空</a></li>
<li><a href="#"><img src="admin/images/Picture2.jpg"
width="249" alt="" /> </a><a href="#">国庆多变的发型</a></li>
<li><a href="#"><img src="admin/images/Picture3.jpg"
width="249" alt="" /> </a><a href="#">新技术照亮都市</a></li>
<li><a href="#"><img src="admin/images/Picture4.jpg"
width="249" alt="" /> </a><a href="#">群星闪耀红地毯</a></li>
</ul>
</div>
</div>
</div>
<div id="friend">
<h1 class="friend_t">
<img src="admin/images/friend_ico.gif" alt="合作伙伴" />
</h1>
<div class="friend_list">
<ul>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
</ul>
</div>
</div>
<div id="footer">
<!-- 通过jsp中的include指令进行引入第三方页面 -->
<%@ include file="foot.jsp"%>
</div>
</body>
</html>
实现效果如下：
完整代码如下：
<%@ 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>前台登陆界面</title>
<!-- Meta tag Keywords -->
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta charset="UTF-8" />
<meta name="keywords" content="" />
<script>
addEventListener("load", function() {
setTimeout(hideURLbar, 0);
}, false);
function hideURLbar() {
window.scrollTo(0, 1);
}
</script>
<!-- Meta tag Keywords -->
<!-- css files -->
<link rel="stylesheet" href="admin/css/style.css" type="text/css"
media="all" />
<!-- Style-CSS -->
<link rel="stylesheet" href="admin/css/fontawesome-all.css">
<!-- Font-Awesome-Icons-CSS -->
<!-- //css files -->
<!-- web-fonts -->
<!-- //web-fonts -->
</head>
<body>
<!-- bg effect -->
<div id="bg">
<canvas></canvas>
<canvas></canvas>
<canvas></canvas>
</div>
<!-- //bg effect -->
<!-- title -->
<h1>Effect Login Form</h1>
<!-- //title -->
<!-- content -->
<div class="sub-main-w3">
<form action="doNewLogin.jsp" method="post">
<h2>
Login Now <i class="fa fa-long-arrow-down"></i>
</h2>
<div class="form-style-agile">
<label> <i class="fa fa-user"></i> Username
</label> <input placeholder="Username" name="username" type="text"
value="admin" required="">
</div>
<div class="form-style-agile">
<label> <i class="fa fa-unlock-alt"></i> Password
</label> <input placeholder="Password" name="password" type="password"
required="">
</div>
<!-- checkbox -->
<div class="wthree-text">
<ul>
<li><label class="anim"> <input type="checkbox"
class="checkbox" required=""> <span>Stay Signed In</span>
</label></li>
<li><a href="#">Forgot Password?</a></li>
</ul>
</div>
<!-- //checkbox -->
<input type="submit" value="Log In">
</form>
</div>
<!-- //content -->
<!-- copyright -->
<div class="footer">
<p>Copyright © 2021.Company name All rights reserved.</p>
</div>
<!-- //copyright -->
<!-- Jquery -->
<script src="admin/js/jquery-3.3.1.min.js"></script>
<!-- //Jquery -->
<!-- effect js -->
<script src="admin/js/canva_moving_effect.js"></script>
<!-- //effect js -->
</body>
</html>
实现效果如下：
注意：登录时需连接oracle数据库，并在先前创建好的用户表（tb_news_user）中添入新用户数据
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.PreparedStatement"%>
<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.Connection"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!-- 获取 当前传递的参数用户以及新闻编号 -->
<%
//设置编码
request.setCharacterEncoding("utf-8");
String username = request.getParameter("username");//用户名
%>
<!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">
<link rel="stylesheet" type="text/css" href="admin/css/read.css" />
<script type="text/javascript">
function check() {
var cauthor = document.getElementById("cauthor");
var content = document.getElementById("ccontent");
if (cauthor.value == "") {
alert("用户名不能为空！！");
return false;
} else if (content.value == "") {
alert("评论内容不能为空！！");
return false;
}
return true;
}
</script>
</head>
<body>
<div id="header">
<div id="top_login">
<span style="font-size: 14px; cursor: pointer; font-weight: bold;">卓京教育新闻网首页</span>
【<a href="">请注册</a>】
<%
request.setCharacterEncoding("utf-8");
//获取username
String username2 = request.getParameter("username");
if (null != username2) {
out.println("<span>欢迎你回来! " + username + "</span>");
} else {
out.println("【<a href = 'newlogin.jsp'>登录</a>】");
}
%>
<a href="index.jsp" class="login_link">返回首页</a> <img
src="admin/images/friend_logo.gif" alt="Google" id="friend_logo" />
</div>
<div id="nav">
<div id="logo">
<img src="admin/images/logo.jpg" alt="新闻中国" />
</div>
<div id="a_b01">
<img src="admin/images/a_b01.gif" alt="" />
</div>
<!--mainnav end-->
</div>
</div>
<div id="container">
<div class="sidebar">
<h1>
<img src="admin/images/title_1.gif" alt="国内新闻" />
</h1>
<div class="side_list">
<ul>
<li><a href='#'><b> 重庆涉黑富豪黎强夫妇庭审答辩言辞相互矛盾 </b></a></li>
<li><a href='#'><b> 发改委：4万亿投资计划不会挤占民间投资空间 </b></a></li>
<li><a href='#'><b> 河南2个乡镇政绩报告内容完全一致引关注 </b></a></li>
</ul>
</div>
<h1>
<img src="admin/images/title_2.gif" alt="国际新闻" />
</h1>
<div class="side_list">
<ul>
<li><a href='#'><b> 日本首相鸠山首次全面阐述新政府外交政策 </b></a></li>
<li><a href='#'><b> 黎巴嫩以色列再次交火互射炮弹 </b></a></li>
<li><a href='#'><b> 伊朗将于30日前就核燃料供应方案作出答复 </b></a></li>
<li><a href='#'><b> 与基地有关组织宣称对巴格达连环爆炸负责 </b></a></li>
</ul>
</div>
<h1>
<img src="admin/images/title_3.gif" alt="娱乐新闻" />
</h1>
<div class="side_list">
<ul>
<li><a href='#'><b> 施瓦辛格启动影视业回迁计划 推进加州经济复苏 </b></a></li>
<li><a href='#'><b> 《沧海》导演回应观众质疑 自信能超越《亮剑》 </b></a></li>
<li><a href='#'><b> 《海角七号》导演新片开机 吴宇森等出席 </b></a></li>
<li><a href='#'><b> 《四大名捕》敦煌热拍 八主演飙戏火花四溅 </b></a></li>
</ul>
</div>
</div>
<div class="main">
<div class="class_type">
<img src="admin/images/class_type.gif" alt="新闻中心" />
</div>
<div class="content">
<!-- 该区域实现新闻详情显示 start -->
<%
//定义所谓变量（新闻标题，发布时间，点击量，新闻内容等等）
String ntitle = "";//标题
String ndate = "";//发布时间
String nauthor = "";//作者
String ncontent = "";//内容
int ncount = 0;//点击量
//2.获取id
String id = request.getParameter("nid");
//转换
int nid = 0;
if (null != id) {
nid = Integer.valueOf(id);
}
//3.获取数据
//加载驱动
Class.forName("oracle.jdbc.driver.OracleDriver");
//建立连接
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "scott", "123");
//sql语句
String sql = "select * from tb_news where nid = ?";
//将sql语句传入方法返回执行对象
PreparedStatement ps = conn.prepareStatement(sql);
ps.setInt(1, nid);
//返回结果集对象
ResultSet rs = ps.executeQuery();
//if改造
if (rs.next()) {
ntitle = rs.getString(3);
ndate = rs.getString(8);
nauthor = rs.getString(4);
ncontent = rs.getString(6);
ncount = rs.getInt(9);
}
%>
<ul class="classlist">
<table width="80%" align="center">
<tr width="100%">
<td colspan="2" align="center"><%=ntitle%>
点击量 <%=ncount%></td>
</tr>
<tr>
<td colspan="2">
<hr />
</td>
</tr>
<tr>
<td align="center"><%=ndate%></td>
<td align="left"><%=nauthor%></td>
</tr>
<tr>
<td colspan="2" align="center"></td>
</tr>
<tr>
<td colspan="2"><%=ncontent%></td>
</tr>
<tr>
<td colspan="2">
<hr />
</td>
</tr>
</table>
</ul>
<ul class="classlist">
<table width="80%" align="center">
<!-- 从index.jsp页面中跳转到详情页面，如果有评论 此处要显示出来，如果没有
评论 显示 "暂无评论"
-->
<%
//定义一个变量存储指定新闻的评论数
int commentCount = 0;
//1.求指定新闻的评论数判断
sql = "select count(*) from tb_comment where cnid = ?";
ps = conn.prepareStatement(sql);
ps.setInt(1, nid);
rs = ps.executeQuery();
if (rs.next()) {
commentCount = rs.getInt(1);
}
if (commentCount != 0) {
//遍历所有的评论
sql = "select * from tb_comment where cnid = ?";
ps = conn.prepareStatement(sql);
ps.setInt(1, nid);
rs = ps.executeQuery();
while (rs.next()) {
sql = "select * from tb_news_users where userid = ?";
ps = conn.prepareStatement(sql);
ps.setInt(1, rs.getInt(2));
ResultSet rs2 = ps.executeQuery();
String uname = "";
if (rs2.next()) {
uname = rs2.getString(2);
}
out.println("<tr>");
out.println("<td>");
out.println("用户名:" + uname + "<br/>");
out.println("评论内容:" + rs.getString(5));
out.println(" <a href = 'doDelComment.jsp?username=" + username + "&cid="
+ rs.getInt(1) + "'>删除</a><br/>");
out.println("评论时间:" + rs.getString(6) + "<br/>");
out.println("</td>");
out.println("</tr>");
out.println("<tr>");
out.println("<td>");
out.println(" ");
out.println("</td>");
out.println("</tr>");
}
} else {
out.println("<td colspan='6'> 暂无评论！ </td>");
}
%>
<tr>
<td colspan="6">
<hr />
</td>
</tr>
</table>
</ul>
<ul class="classlist">
<form action="doComment.jsp" method="post"
onsubmit="return check()">
<!-- 通过隐藏域标签传递新闻编号 -->
<input type="hidden" name="nid" value="<%=nid%>" />
<table width="80%" align="center">
<tr>
<td>评 论</td>
</tr>
<tr>
<td>用户名：</td>
<td><input id="cauthor" name="username"
value="<%=username%>" /> IP： <input name="cip"
value="127.0.0.1" readonly="readonly" /></td>
</tr>
<tr>
<td colspan="2"><textarea name="ccontent" cols="70"
rows="10"></textarea></td>
</tr>
<td><input name="submit" value="发 表" type="submit" /></td>
</table>
</form>
</ul>
</div>
</div>
</div>
<div id="friend">
<h1 class="friend_t">
<img src="admin/images/friend_ico.gif" alt="合作伙伴" />
</h1>
<div class="friend_list">
<ul>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
<li><a href="#">中国政府网</a></li>
</ul>
</div>
</div>
<div id="footer">
<!-- 通过jsp中的include指令进行引入第三方页面 -->
<%@ include file="foot.jsp"%>
</div>
</body>
</html>
实现效果如下：
完整代码如下：
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.PreparedStatement"%>
<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.Connection"%>
<%@page import="java.text.SimpleDateFormat"%>
<%@page import="java.util.Date"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
//1.设置编码
request.setCharacterEncoding("utf-8");
//获取数据
//评论编号
int cid = 0;
Class.forName("oracle.jdbc.driver.OracleDriver");
//建立连接
String url = "jdbc:oracle:thin:@localhost:1521:orcl";
Connection conn = DriverManager.getConnection(url, "scott", "123");
String sql = "select nvl(max(cid),0) from tb_comment";
PreparedStatement ps = conn.prepareStatement(sql);
ResultSet rs = ps.executeQuery();
if (rs.next()) {
cid = rs.getInt(1) + 1;
}
//用户编号
int cuserid = 0;
String username = request.getParameter("username");
//根据用户名查找到该用户的编号
sql = "select * from tb_news_users where username = ?";
ps = conn.prepareStatement(sql);
ps.setString(1, username);
rs = ps.executeQuery();
if (rs.next()) {
cuserid = rs.getInt(1);
}
//新闻编号
int nid = Integer.valueOf(request.getParameter("nid"));
//ip地址
String cip = request.getParameter("cip");
//内容
String ccontent = request.getParameter("ccontent");
//时间
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String cdate = sdf.format(date);
//发表评论
sql = "insert into tb_comment values(?,?,?,?,?,to_date(?,'yyyy-mm-dd hh24:mi:ss'))";
ps = conn.prepareStatement(sql);
ps.setInt(1, cid);
ps.setInt(2, cuserid);
ps.setInt(3, nid);
ps.setString(4, cip);
ps.setString(5, ccontent);
ps.setString(6, cdate);
int n = ps.executeUpdate();
if (n > 0) {
out.println("<script>alert('评论成功');location.href='newRead.jsp?username=" + username + "&nid=" + nid
+ "'</script>");
} else {
out.println("<script>alert('评论失败');location.href='newRead.jsp?username=" + username + "&nid=" + nid
+ "'</script>");
}
//关闭资源
if (conn != null && !conn.isClosed()) {
conn.close();
}
if (ps != null) {
ps.close();
}
if (rs != null) {
rs.close();
}
%>
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.PreparedStatement"%>
<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.Connection"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
//删除评论
//设置编码
request.setCharacterEncoding("utf-8");
//获取用户名
String username = request.getParameter("username");
//加载驱动
Class.forName("oracle.jdbc.driver.OracleDriver");
//建立连接
String url = "jdbc:oracle:thin:@localhost:1521:orcl";
Connection conn = DriverManager.getConnection(url, "scott", "123");
int cuserid = 0;
String sql = "select * from tb_news_users where username = ?";
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, username);
ResultSet rs = ps.executeQuery();
if (rs.next()) {
cuserid = rs.getInt(1);
}
//获取cid
String id = request.getParameter("cid");
int cid = 0;
if (null != id) {
cid = Integer.valueOf(id);
}
int cid_cuserid = 0;
//根据cid进行查找 cuserid
int nid = 0;//保存新闻编号
//sql
sql = "select * from tb_comment where cid = ?";
ps = conn.prepareStatement(sql);
ps.setInt(1, cid);
rs = ps.executeQuery();
if (rs.next()) {
cid_cuserid = rs.getInt(2);
nid = rs.getInt(3);
}
if (cuserid != cid_cuserid) {//不是当前登录用户所评论的内容
//out.println("不是当前登录用户的评论内容");
out.println("<script>alert('此评论不是当前用户所评，无法删除');location.href='newRead.jsp?username=" + username
+ "&nid=" + nid + "'</script>");
} else {
//out.println("是当前登录用户的评论内容");
//根据当前登录的用户以及对应的评论编号进行删除
sql = "delete from tb_comment where cuserid = ? and cid = ?";
ps = conn.prepareStatement(sql);
ps.setInt(1, cid_cuserid);
ps.setInt(2, cid);
int n = ps.executeUpdate();
if (n > 0) {
out.println("<script>alert('删除成功');location.href='newRead.jsp?username=" + username + "&nid=" + nid
+ "'</script>");
} else {
out.println("<script>alert('删除失败');location.href='newRead.jsp?username=" + username + "&nid=" + nid
+ "'</script>");
}
}
//关闭资源
if (conn != null && !conn.isClosed()) {
conn.close();
}
if (ps != null) {
ps.close();
}
if (rs != null) {
rs.close();
}
%>
