记jsp+servlet+jdbc实现的新闻管理系统
1.工具：eclipse+SQLyog
2.介绍：实现的内容就是显示新闻的基本信息，然后一个增删改查和分页的操作。
3.数据库表设计
| 列名 | 中文名称 | 数据类型 | 长度 | 非空 |
| newsId | 文章ID | int | 11 | √ |
| newsTitle | 文章标题 | varchar | 20 | √ |
| newsContent | 文章内容 | text | ||
| newsStatus | 是否审核 | varchar | 10 | |
| newsType | 文章类型 | varchar | 20 | |
| createtime | 创建时间 | varchar | 20 |
5.功能实现:
6.代码:
News.java
package com.entity;
/*
* 新闻表
*/
public class News {
private Integer newsId;
private String newsTitle;
private String newsContent;
private String newsStatus;
private String newsType;
private String createTime;
public Integer getNewsId() {
return newsId;
}
public void setNewsId(Integer newsId) {
this.newsId = newsId;
}
public String getNewsTitle() {
return newsTitle;
}
public void setNewsTitle(String newsTitle) {
this.newsTitle = newsTitle;
}
public String getNewsContent() {
return newsContent;
}
public void setNewsContent(String newsContent) {
this.newsContent = newsContent;
}
public String getNewsStatus() {
return newsStatus;
}
public void setNewsStatus(String newsStatus) {
this.newsStatus = newsStatus;
}
public String getNewsType() {
return newsType;
}
public void setNewsType(String newsType) {
this.newsType = newsType;
}
public String getCreateTime() {
return createTime;
}
public void setCreateTime(String createTime) {
this.createTime = createTime;
}
@Override
public String toString() {
return "News [newsId=" + newsId + ", newsTitle=" + newsTitle + ", newsContent=" + newsContent + ", newsStatus="
+ newsStatus + ", newsType=" + newsType + ", createTime=" + createTime + "]";
}
public News(Integer newsId, String newsTitle, String newsContent, String newsStatus, String newsType,
String createTime) {
this.newsId = newsId;
this.newsTitle = newsTitle;
this.newsContent = newsContent;
this.newsStatus = newsStatus;
this.newsType = newsType;
this.createTime = createTime;
}
public News() {
}
}
index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>新闻主页</title>
</head>
<script type="text/javascript">
location.href="NewsServlet";
</script>
<body>
</body>
</html>
NewsServlet.java
package com.servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.dao.NewsDao;
import com.entity.News;
@WebServlet("/NewsServlet")
public class NewsServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private NewsDao newsDao;
@Override
public void init() throws ServletException {
newsDao = new NewsDao();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=utf-8");
String oprate = request.getParameter("oprate");
// 如果该次请求是添加新闻
if ("addNews".equals(oprate)) {
String newsTitle = request.getParameter("newsTitle");
String newsType = request.getParameter("newsType");
String newsContent = request.getParameter("newsContent");
int row = newsDao.addNews(newsTitle, newsType, newsContent);
response.sendRedirect("NewsServlet");
} else if("delete".equals(oprate)) {
Integer id = Integer.valueOf(request.getParameter("id"));
int row = newsDao.deleteNewsById(id);
response.sendRedirect("NewsServlet");
} else if("allDelete".equals(oprate)) {
String[] deleteId = request.getParameterValues("deleteId");
for (String string : deleteId) {
Integer did = Integer.valueOf(string);
//循环一次删一次
newsDao.deleteNewsById(did);
}
response.sendRedirect("NewsServlet");
} else if("allPass".equals(oprate)) {
String[] deleteId = request.getParameterValues("deleteId");
for (String string : deleteId) {
Integer did = Integer.valueOf(string);
newsDao.passNews(did);
}
response.sendRedirect("NewsServlet");
} else if("edit".equals(oprate)) {
Integer id = Integer.valueOf(request.getParameter("id"));
News news = newsDao.getNews(id);
request.setAttribute("news", news);
request.getRequestDispatcher("edit.jsp").forward(request, response);
} else if("editNews".equals(oprate)) {
Integer id = Integer.valueOf(request.getParameter("id"));
String newsTitle = request.getParameter("newsTitle");
String newsType = request.getParameter("newsType");
String newsContent = request.getParameter("newsContent");
int row = newsDao.updateNews(id, newsTitle, newsType, newsContent);
response.sendRedirect("NewsServlet");
} else {
Integer pageNumber = 1;
String pn = request.getParameter("pageNumber");// 传过来的页码
if (pn != null) {
pageNumber = Integer.valueOf(pn);
}
if (pageNumber <= 1) {
pageNumber = 1;
}
int count = newsDao.getCount();
Integer pageSize = 5;// 每页显示五条
int pageCount = count % pageSize == 0 ? count / pageSize : count / pageSize + 1;
if (pageNumber > pageCount) {
pageNumber = pageCount;
}
// 调用查询新闻集合的方法
List<News> newsList = newsDao.getNewsList(pageNumber, pageSize);
// 添加到request作用域中
request.setAttribute("newsList", newsList);
// 添加当前显示的页码
request.setAttribute("pageNumber", pageNumber);
// 显示最后一页的页码
request.setAttribute("pageCount", pageCount);
// 转发到newList页面
request.getRequestDispatcher("newList.jsp").forward(request, response);
}
}
}
newsDao.java
package com.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import com.entity.News;
public class NewsDao {
/*
* 查询所有新闻集合
*
* @pageNumber 页码
*
* @pageSize 每页显示几条
*/
public List<News> getNewsList(Integer pageNumber, Integer pageSize) {
List<News> newsList = new ArrayList<News>();
Connection connection = null;
Statement statement = null;
ResultSet resultSet = null;
try {
// 1.加载驱动
Class.forName("com.mysql.jdbc.Driver");
// 2.驱动管理器获取数据库连接
connection = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/news?useUnicode=true&characterEncoding=utf-8", "root", "123456");
// System.out.println(connection);
// 3.获取statement，执行sql
statement = connection.createStatement();
// 4.执行sql返回结果集并解析
int startSize = (pageNumber - 1) * pageSize;
resultSet = statement.executeQuery("select * from news limit " + startSize + "," + pageSize);
while (resultSet.next()) {
int newsId = resultSet.getInt("newsId");
String newsTitle = resultSet.getString("newsTitle");
String newsContent = resultSet.getString("newsContent");
String newsStatus = resultSet.getString("newsStatus");
String newsType = resultSet.getString("newsType");
String createTime = resultSet.getString("createTime");
News news = new News(newsId, newsTitle, newsContent, newsStatus, newsType, createTime);
newsList.add(news);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (resultSet != null) {
resultSet.close();
}
if (statement != null) {
statement.close();
}
if (connection != null) {
connection.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return newsList;
}
/*
* 查询新闻总条数的方法
*/
public int getCount() {
int count = 0;
Connection connection = null;
Statement statement = null;
ResultSet resultSet = null;
try {
// 1.加载驱动
Class.forName("com.mysql.jdbc.Driver");
// 2.驱动管理器获取数据库连接
connection = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/news?useUnicode=true&characterEncoding=utf-8", "root", "123456");
// 3.获取statement，执行sql
statement = connection.createStatement();
resultSet = statement.executeQuery("select count(*) from news");
if (resultSet.next()) {
count = resultSet.getInt(1);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (resultSet != null) {
resultSet.close();
}
if (statement != null) {
statement.close();
}
if (connection != null) {
connection.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return count;
}
/**
* 添加新闻的方法
*
* @param newsTitle 新闻标题
* @param newsType 新闻类型
* @param newsContent 新闻正文
* @return
*/
public int addNews(String newsTitle, String newsType, String newsContent) {
int row = 0;
Connection connection = null;
PreparedStatement statement = null;
ResultSet resultSet = null;
try {
// 1.加载驱动
Class.forName("com.mysql.jdbc.Driver");
// 2.驱动管理器获取数据库连接
connection = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/news?useUnicode=true&characterEncoding=utf-8", "root", "123456");
// 3.获取statement，执行sql
String sql = "insert into news(newsTitle,newsContent,newsStatus,newsType,createtime) values(?,?,?,?,?)";
statement = connection.prepareStatement(sql);
statement.setObject(1, newsTitle);
statement.setString(2, newsContent);
statement.setString(3, "未审核");
statement.setString(4, newsType);
statement.setString(5, "2020-02-09");
row = statement.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (resultSet != null) {
resultSet.close();
}
if (statement != null) {
statement.close();
}
if (connection != null) {
connection.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return row;
}
public int deleteNewsById(Integer id) {
int row = 0;
Connection connection = null;
PreparedStatement statement = null;
ResultSet resultSet = null;
try {
// 1.加载驱动
Class.forName("com.mysql.jdbc.Driver");
// 2.驱动管理器获取数据库连接
connection = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/news?useUnicode=true&characterEncoding=utf-8", "root", "123456");
String sql = "delete from news where newsId =?";
statement = connection.prepareStatement(sql);
statement.setObject(1, id);
row = statement.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (resultSet != null) {
resultSet.close();
}
if (statement != null) {
statement.close();
}
if (connection != null) {
connection.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return row;
}
/**
* 审核新闻
*
* @param id
* @return
*/
public int passNews(Integer id) {
int row = 0;
Connection connection = null;
PreparedStatement statement = null;
ResultSet resultSet = null;
try {
// 1.加载驱动
Class.forName("com.mysql.jdbc.Driver");
// 2.驱动管理器获取数据库连接
connection = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/news?useUnicode=true&characterEncoding=utf-8", "root", "123456");
String sql = "update news set newsStatus = '已审核' where newsId = ?";
statement = connection.prepareStatement(sql);
statement.setObject(1, id);
row = statement.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (resultSet != null) {
resultSet.close();
}
if (statement != null) {
statement.close();
}
if (connection != null) {
connection.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return row;
}
/**
* 根据新闻主键查询新闻对象
*
* @param id
* @return
*/
public News getNews(Integer id) {
News news = null;
Connection connection = null;
PreparedStatement statement = null;
ResultSet resultSet = null;
try {
// 1.加载驱动
Class.forName("com.mysql.jdbc.Driver");
// 2.驱动管理器获取数据库连接
connection = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/news?useUnicode=true&characterEncoding=utf-8", "root", "123456");
// System.out.println(connection);
// 3.获取statement，执行sql
String sql = "select * from news where newsId = ?";
statement = connection.prepareStatement(sql);
statement.setInt(1, id);
// 4.执行sql返回结果集并解析
resultSet = statement.executeQuery();
if (resultSet.next()) {
int newsId = resultSet.getInt("newsId");
String newsTitle = resultSet.getString("newsTitle");
String newsContent = resultSet.getString("newsContent");
String newsStatus = resultSet.getString("newsStatus");
String newsType = resultSet.getString("newsType");
String createTime = resultSet.getString("createTime");
news = new News(newsId, newsTitle, newsContent, newsStatus, newsType, createTime);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (resultSet != null) {
resultSet.close();
}
if (statement != null) {
statement.close();
}
if (connection != null) {
connection.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return news;
}
/**
* 修改新闻
* @param id
* @param newsTitle
* @param newsType
* @param newsContent
* @return
*/
public int updateNews(Integer id,String newsTitle,String newsType,String newsContent) {
int row = 0;
Connection connection = null;
PreparedStatement statement = null;
ResultSet resultSet = null;
try {
// 1.加载驱动
Class.forName("com.mysql.jdbc.Driver");
// 2.驱动管理器获取数据库连接
connection = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/news?useUnicode=true&characterEncoding=utf-8", "root", "123456");
String sql = "update news set newsTitle = ?,newsType = ?,newsContent = ?where newsId = ?";
statement = connection.prepareStatement(sql);
statement.setObject(1, newsTitle);
statement.setObject(2, newsType);
statement.setObject(3, newsContent);
statement.setObject(4, id);
row = statement.executeUpdate();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (resultSet != null) {
resultSet.close();
}
if (statement != null) {
statement.close();
}
if (connection != null) {
connection.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
return row;
}
}
newsList.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>新闻列表</title>
<script type="text/javascript">
function quanxuan(qx) {
var deleteId = document.getElementsByName("deleteId");
for (var i = 0; i < deleteId.length; i++) {
deleteId[i].checked = qx.checked;
}
}
function changeForm(){
document.getElementById("oprate").value="allPass";
document.forms[0].submit();
}
</script>
</head>
<body>
<form action="NewsServlet" method="post">
<input type="submit" value="批量删除" />
<input type="button" value="批量审核" onclick="changeForm()"/>
<input type="hidden" name="oprate" id="oprate" value="allDelete"/>
<table width="1000px" cellpadding="0px" border="1px"
style="border: 1px solid gray; border-collapse: collapse">
<tr>
<th><input type="checkbox" name="qx" onclick="quanxuan(this)" /></th>
<th>文章ID</th>
<th>文章标题</th>
<th>所属栏目</th>
<th>创建时间</th>
<th>是否审核</th>
<th>操作</th>
</tr>
<c:forEach items="${newsList}" var="news">
<tr>
<td><input type="checkbox" name="deleteId"
value="${news.newsId }" /></td>
<td>${news.newsId }</td>
<td>${news.newsTitle }</td>
<td>${news.newsType }</td>
<td>${news.createTime }</td>
<td>${news.newsStatus }</td>
<td>
<a href="NewsServlet?oprate=edit&id=${news.newsId }">编辑</a>
| <a
href="NewsServlet?oprate=delete&id=${news.newsId }">删除 |</a> <a
href="addNews.jsp">增加</a></td>
</tr>
</c:forEach>
<tr>
<td colspan="7"><center><a href="NewsServlet?pageNumber=1">首页</a> <a
href="NewsServlet?pageNumber=${pageNumber-1 }">上一页</a> <a
href="NewsServlet?pageNumber=${pageNumber+1 }">下一页</a> <a
href="NewsServlet?pageNumber=${pageCount }">尾页</a></center></td>
</tr>
</table>
</form>
</body>
</html>
addNews.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>添加新闻</title>
<script type="text/javascript" src="kindeditor-4.1.10/kindeditor.js"></script>
<script type="text/javascript">
KindEditor.ready(function(K) {
K.create('#content', {
uploadJson : 'kindeditor-4.1.10/jsp/upload_json.jsp',
fileManagerJson : 'kindeditor-4.1.10/jsp/file_manager_json.jsp',
allowFileManager : true
});
});
</script>
</head>
<body>
<form action="NewsServlet" method="post">
<input type="hidden" name="oprate" value="addNews"/>
<input type="text" name="newsTitle" placeholder="请输入标题"/><br/>
新闻栏目
<select name="newsType">
<option value="JQuery">jQuery</option>
<option value="Java">Java</option>
<option value="MySQL">MySQL</option>
</select><br/>
<textarea id="content" name="newsContent" rows=" 8" cols="70"></textarea><br/>
<input type="submit" value="添加"/>
</form>
</body>
</html>
editNews.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>修改新闻</title>
<script type="text/javascript" src="kindeditor-4.1.10/kindeditor.js"></script>
<script type="text/javascript">
KindEditor.ready(function(K) {
K.create('#content', {
uploadJson : 'kindeditor-4.1.10/jsp/upload_json.jsp',
fileManagerJson : 'kindeditor-4.1.10/jsp/file_manager_json.jsp',
allowFileManager : true
});
});
</script>
</head>
<body>
<form action="NewsServlet" method="post">
<input type="hidden" value="${news.newsId }" name="id"/>
<input type="hidden" name="oprate" value="editNews"/>
<input type="text" name="newsTitle" value="${news.newsTitle }" placeholder="请输入标题"/><br/>
新闻栏目
<select name="newsType">
<option <c:if test="${news.newsType==\"jQuery\" }">selected</c:if> value="JQuery">jQuery</option>
<option <c:if test="${news.newsType==\"Java\" }">selected</c:if> value="Java">Java</option>
<option <c:if test="${news.newsType==\"MySQL\" }">selected</c:if> value="MySQL">MySQL</option>
</select><br/>
<textarea id="content" name="newsContent" rows=" 8" cols="70">${news.newsContent }</textarea><br/>
<input type="submit" value="确定修改"/>
</form>
</body>
</html>