java-ee项目结构设计
1.dao:对数据库的访问，实现了增删改查
2.entity:定义了新闻、评论、用户三个实体，并设置对应实体的属性
3.filter：过滤器，设置字符编码都为utf8，防止乱码出现
4.service:业务逻辑处理
5.servlet:处理页面请求
6.utils:工具类
7.c3p0-config.xml：JDBC配置
JavaWeb新闻管理系统（基础版）-腾讯云开发者社区-腾讯云
https://www.cnblogs.com/luomei/p/13124130.htmlJSP显示新闻
Java Jsp+mysql实现新闻发布管理系统（新闻管理、栏目/评论管理、）_jsp项目案例:新闻发布系统—主题管理及首页新闻显示-CSDN博客
NewsaddServlet.java
package comm.ch11_pra.servlet.news;import comm.ch11_pra.entity.News;import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.ArrayList;@WebServlet(name = "newsaddServlet", value = "/newsaddServlet")
public class NewsaddServlet extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doPost(request, response);}@Overrideprotected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html; charset=UTF-8");PrintWriter out = response.getWriter();out.println("财院新闻");Connection connection = null;Statement st = null;ResultSet rs = null;try {Class.forName("com.mysql.jdbc.Driver");connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/ch11?characterEncoding=utf-8","root", "123456");String add_title = request.getParameter("add_title");String add_author=request.getParameter("add_author");String add_content=request.getParameter("add_content");PreparedStatement ps=connection.prepareStatement("insert into news values (null,?,?,?,?)");ps.setString(1,add_title);ps.setString(2,add_author);ps.setString(3,add_content);SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Date date1 = new Date(System.currentTimeMillis());String currentTime = dateFormat.format(date1);ps.setString(4,currentTime);ps.executeUpdate();response.sendRedirect("newsServlet");} catch (Exception e) {throw new RuntimeException(e);}finally {
// try {
// connection.close();
// st.close();
// rs.close();
// } catch (Exception e) {
// throw new RuntimeException(e);
// }}}
}
index.jsp
<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head><title>JSP - Hello World</title>
</head>
<script>function news(){var form = document.getElementById("myForm");form.action = "newsServlet"form.submit();}function notice(){var form = document.getElementById("myForm");form.action = "noticeServlet"form.submit();}function media(){var form = document.getElementById("myForm");form.action = "mediaServlet"form.submit();}function video(){var form = document.getElementById("myForm");form.action = "videoServlet"form.submit();}</script><body>
<form action="" id="myForm"><input type="button" value="新闻" onclick="news()"><input type="button" value="公告" onclick="notice()"><input type="button" value="媒体" onclick="media()"><input type="button" value="视频" onclick="video()">
</form></body>
</html>news.jsp
<%@ page import="comm.ch11_pra.entity.News" %>
<%@ page import="java.util.ArrayList" %><%--Created by IntelliJ IDEA.User: AdministratorDate: 2023/12/23Time: 11:43To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>Title</title>
</head>
<script>function addModelShow(){document.getElementsByName("add_title")[0].value="";document.getElementsByName("add_author")[0].value="";document.getElementsByName("add_content")[0].value="";var addModel=document.getElementById("addModel");addModel.style.display="block";}function addModelClose(){var addModel=document.getElementById("addModel");addModel.style.display="none";}
</script><body>
<%ArrayList<News> news_list = (ArrayList<News>) request.getAttribute("news_list");
%>
<form action="newsServlet">标题：<input type="text" name="search_title">作者：<input type="text" name="search_author">内容：<input type="text" name="search_content"><input type="submit" value="查询">
</form>
<input type="button" value="新增" onclick="addModelShow()">
<table border="1"><tr><th>id</th><th>title</th><th>author</th><th>content</th><th>date</th></tr><%if(news_list!=null){for(News news : news_list){out.print("<tr>");out.print("<td>" + news.getId() + "</td>");out.print("<td>" + news.getTitle() + "</td>");out.print("<td>" + news.getAuthor() + "</td>");out.print("<td>" + news.getContent() + "</td>");out.print("<td>" + news.getDate() + "</td>");out.print("</tr>");}}%>
</table>
<div id="addModel" style="display: none;position: absolute;top: 40%;left: 45%;border: 2px dashed #f00;padding: 10px"><div><span style="margin-left: 70px">新增新闻</span><div style="float: right" onclick="addModelClose()">X</div></div><form action="newsaddServlet">标题：<input type="text" name="add_title"><br>作者：<input type="text" name="add_author"><br>内容：<input type="text" name="add_content"><br><input type="submit" value="确认"></form></div>
</body>
</html>
 方法)
