第四次作业 JSP显示新闻

其他 2020-06-25 15:34:49 阅读次数: 0

JSP显示新闻

创建数据库

在数据库中创建用户表，并插入数据

创建新闻表并插入数据

 

编写表所对应的实体类

 编写News类

复制代码 
import java.sql.Date;

public class News {
    private int idnews;
    private String title;
    private String content;
    private String author;
    private Date date;
    public int getIdnews() {
        return idnews;
}
    public void setIdnews(int idnews) {
        this.idnews = idnews;
}
    public String getTitle() {
        return title;
}
    public void setTitle(String title) {
        this.title = title;
}
    public String getContent() {
        return content;
}
    public void setContent(String content) {
        this.content = content;
}
    public String getAuthor() {
        return author;
}
    public void setAuthor(String author) {
        this.author = author;
}
    public Date getNewsdate() {
        return date;
}
    public void setNewsdate(Date newsdate) {
        this.date = newsdate;
}

}
复制代码

编写提供查询服务的类

编写查询News的类

复制代码 

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;


//提供News类的数据服务
public class NewsService {

    public void AddNews(){}
    public void DeleteNews(){}
    public void UpdateNews(){}
    public List<News> QueryNews() throws SQLException {
        String sql="Select * from news";
DatabaseOperation operation=new DatabaseOperation();
ResultSet rs= operation.executeQuery(sql);
List<News> lsNews=new ArrayList<News>();
        while (rs.next())
        {
            News news=new News();
news.setIdnews(rs.getInt(1));
news.setTitle(rs.getString(2));
news.setContent(rs.getString(3));
news.setAuthor(rs.getString(4));
news.setNewsdate(rs.getDate(5));
lsNews.add(news);
}
        return lsNews;
}
    public void GetNews(){}

}
复制代码

编写控制信息显示的ShowNewsServlet类

复制代码 
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 java.io.IOException;
import java.sql.SQLException;
import java.util.List;

@WebServlet(name = "ShowNewsListServlet")
public class ShowNewsListServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
NewsService newsService=new NewsService();
        try {
            List<News> lsNews=newsService.QueryNews();
request.setAttribute("lsNews",lsNews);
request.getRequestDispatcher("ShowNewsList.jsp").forward(request,response);
} catch (SQLException e) {
            e.printStackTrace();
}
    }
}
复制代码

显示新闻列表得网页

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>产品管理</title>
<link rel="stylesheet" type="text/css" href="css/Iframe.css" />
<link rel="stylesheet" href="utilLib/bootstrap.min.css" type="text/css" media="screen" />
</head>

<body>
<span class="cp_title">新闻管理</span>
<div class="add_cp">
   <a href="logo.html">+添加新闻</a>
</div>
<div class="table_con">
   <table>
       <tr class="tb_title">
           <td width="10%">ID</td>
            <td width="30%">标题</td>
            <td width="20%">内容</td>
            <td width="15%">作者</td>
            <td width="10%">时间</td>
            <td width="15%">操作</td>
        </tr>
<c:forEach var="n" items="${lsNews}" >
            <tr>
            <td width="10%">${n.idnews}</td>
            <td width="30%">${n.title}</td>
            <td width="20%">${n.content}</td>
            <td width="15%">${n.author}</td>
            <td width="10%">${n.date}</td>
            <td width="15%">
                <a href="editServlet?newid=${n.idnews}" class="bj_btn">编辑</a>
                <a href="viewServlet?newid=${n.idnews}" class="sj_btn">查看</a>
                <a href="deleteServlet?newid=${n.idnews}" class="del_btn">删除</a>
            </td>
            </tr>
</c:forEach>
    </table>
</div>
</body>
</html>
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 代码地址https://gitee.com/ganis/news

创建数据库

在数据库中创建用户表，并插入数据

创建新闻表并插入数据

 

编写表所对应的实体类

 编写News类

复制代码 
import java.sql.Date;

public class News {
    private int idnews;
    private String title;
    private String content;
    private String author;
    private Date date;
    public int getIdnews() {
        return idnews;
}
    public void setIdnews(int idnews) {
        this.idnews = idnews;
}
    public String getTitle() {
        return title;
}
    public void setTitle(String title) {
        this.title = title;
}
    public String getContent() {
        return content;
}
    public void setContent(String content) {
        this.content = content;
}
    public String getAuthor() {
        return author;
}
    public void setAuthor(String author) {
        this.author = author;
}
    public Date getNewsdate() {
        return date;
}
    public void setNewsdate(Date newsdate) {
        this.date = newsdate;
}

}
复制代码

编写提供查询服务的类

编写查询News的类

复制代码 

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;


//提供News类的数据服务
public class NewsService {

    public void AddNews(){}
    public void DeleteNews(){}
    public void UpdateNews(){}
    public List<News> QueryNews() throws SQLException {
        String sql="Select * from news";
DatabaseOperation operation=new DatabaseOperation();
ResultSet rs= operation.executeQuery(sql);
List<News> lsNews=new ArrayList<News>();
        while (rs.next())
        {
            News news=new News();
news.setIdnews(rs.getInt(1));
news.setTitle(rs.getString(2));
news.setContent(rs.getString(3));
news.setAuthor(rs.getString(4));
news.setNewsdate(rs.getDate(5));
lsNews.add(news);
}
        return lsNews;
}
    public void GetNews(){}

}
复制代码

编写控制信息显示的ShowNewsServlet类

复制代码 
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 java.io.IOException;
import java.sql.SQLException;
import java.util.List;

@WebServlet(name = "ShowNewsListServlet")
public class ShowNewsListServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
NewsService newsService=new NewsService();
        try {
            List<News> lsNews=newsService.QueryNews();
request.setAttribute("lsNews",lsNews);
request.getRequestDispatcher("ShowNewsList.jsp").forward(request,response);
} catch (SQLException e) {
            e.printStackTrace();
}
    }
}
复制代码

显示新闻列表得网页

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>产品管理</title>
<link rel="stylesheet" type="text/css" href="css/Iframe.css" />
<link rel="stylesheet" href="utilLib/bootstrap.min.css" type="text/css" media="screen" />
</head>

<body>
<span class="cp_title">新闻管理</span>
<div class="add_cp">
   <a href="logo.html">+添加新闻</a>
</div>
<div class="table_con">
   <table>
       <tr class="tb_title">
           <td width="10%">ID</td>
            <td width="30%">标题</td>
            <td width="20%">内容</td>
            <td width="15%">作者</td>
            <td width="10%">时间</td>
            <td width="15%">操作</td>
        </tr>
<c:forEach var="n" items="${lsNews}" >
            <tr>
            <td width="10%">${n.idnews}</td>
            <td width="30%">${n.title}</td>
            <td width="20%">${n.content}</td>
            <td width="15%">${n.author}</td>
            <td width="10%">${n.date}</td>
            <td width="15%">
                <a href="editServlet?newid=${n.idnews}" class="bj_btn">编辑</a>
                <a href="viewServlet?newid=${n.idnews}" class="sj_btn">查看</a>
                <a href="deleteServlet?newid=${n.idnews}" class="del_btn">删除</a>
            </td>
            </tr>
</c:forEach>
    </table>
</div>
</body>
</html>

 代码地址https://gitee.com/ganis/news

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