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当记录条数过多时会自动出现滚轮,数据不会超出紫框
数据库实时记录:
链接: https://pan.baidu.com/s/1w0czmH9xBfetk7CZ7RNbtQ?pwd=6666 提取码: 6666 复制这段内容后打开百度网盘手机App,操作更方便哦
生日表:t_birthday
需要字段:姓名,年龄,生日日期
首先,要准备好网页要用到的背景图片,在html文件的同一级文件夹下创建 images 文件夹,将所有图片放入其中
开始界面:main.html,需要设计一个查询生日录按钮,再美化一下网页
- <!DOCTYPE html>
- <html>
-
- <head>
- <meta charset="UTF-8">
- <title>小曼波生日录</title>
- <style>
- div{
- border: 10px solid #c68383;
- margin-left: 150px;
- margin-right: 150px;
- padding: 20px;
- }
- img{
- width: 50%;
- }
- input{
- background-image: url("images/log.jpg");
- width: 300px;
- height: 300px;
- font-size: 50px;
- }
- p{
- font-size: 21px;
- }
- h1{
- background-color: #c68383;
- }
- </style>
- </head>
-
- <body>
- <div>
- <img src="images/log.jpg" style="float: left; margin-right: 10px;" />
- <h1>小曼波生日录</h1>
- <p>
- 小曼波老是忘记好朋友的生日,摸摸她的脑袋,帮她回忆回忆吧!
- </p>
- <form action="show.html" method="get">
- <input type="submit" value="点击查询">
- </form>
- </div>
- </body>
-
- </html>
查询结果展示页面:show.html,需要一个新增按钮,需要在每条数据后面添加删除按钮
- <!DOCTYPE html>
- <html>
-
- <head>
- <meta charset="UTF-8">
- <title>生日表查询结果</title>
- <style>
- table {
- width: 75%;
- border-collapse: collapse;
- margin: 0 auto;
- }
-
- th,
- td {
- border: 2px solid black;
- padding: 10px;
- text-align: center;
- background-color: white;
- opacity: 0.8;
- }
- body {
- background-image: url("images/img.png");
- background-size: cover;
- background-repeat: no-repeat;
- margin: 0;
- padding: 0;
- }
- h1{
- width: 50%;
- text-align : center;
- background-color: #e1a8f6;
- opacity: 0.8;
- }
- #content {
- background-color: white;
- border: 10px solid #e1a8f6;
- overflow-y: auto;
- max-height: 320px;
- margin-left: 100px;
- margin-right: 100px;
- opacity: 0.8;
- }
- .add {
- width: 300px;
- text-align : center;
- opacity: 0.8;
- }
- </style>
- <script type="text/javascript">
- function del(name){
- var flag = window.confirm("哦马吉利~曼波~你确认要删除吗");
- if(flag){
- //浏览器发送get请求
- }
- }
- </script>
- </head>
-
- <body>
-
- <div style="display: grid; place-items: center;">
- <h1>想起来了!wow~</h1>
- <button class="add" onclick="window.location.href='add.html'">新增</button>
- <button class="add" onclick="window.location.href='main.html'">返回</button>
- <br>
- </div>
- <div id="content">
- <table>
- <tr>
- <th>姓名</th>
- <th>年龄</th>
- <th>生日日期</th>
- <th>操作</th>
- </tr>
- <!-- 在这里展示查询的结果,目前先暂时写一个测试用例 -->
- <tr>
- <td>曼波</td>
- <td>18</td>
- <td>1-1-1</td>
- <td><a href="javascript:void(0)" onclick="del(this)">删除</a></td>
- </tr>
- <!-- 在这里展示查询的结果,目前先暂时写一个测试用例 -->
- </table>
- </div>
- </body>
-
- </html>
新增页面:add.html,需要输入人物信息,需要一个 post 请求提交按钮
- <!DOCTYPE html>
- <html>
-
- <head>
- <meta charset="UTF-8">
- <title>新增生日信息</title>
- <style>
- body {
- height: 800px;
- background-image: url("images/add.png");
- background-repeat: no-repeat;
- background-position: center ;
-
- display: grid;
- place-items: center;
- }
- div {
- border: 2px solid black;
- background-color: white;
- opacity: 0.7;
- text-align: center;
- font-weight: bold;
- padding: 10px;
- }
- form{
- width: 380px;
- }
- input{
- width: 200px;
- }
- </style>
- </head>
-
- <body>
- <div>
- <p>新增生日信息</p>
- <form action="/birth/add/post" method="post">
- <label for="name">姓名:</label><input type="text" id="name" name="name"><br>
- <label for="age">年龄:</label><input type="number" id="age" name="age"><br>
- <label for="birthday">生日:</label><input type="String" id="birthday" name="birthday">
- <br>
- <hr>
- <input type="submit" value="提交">
- </form>
- <hr>
- <form action="show.html" method="get">
- <input type="submit" value="返回">
- </form>
- </div>
- </body>
-
- </html>
这是我美化网页用到的所有标签以及参数
标签中声明只需以空格隔开
选择id:#
标题居中展示属性:
居中方式一:text-align: center;
居中方式二:margin: 0 auto;
居中方式三: <div style="display: grid; place-items: center;">
横竖都居中:
div {
display: flex;
align-items: center;
justify-content: center;
}不透明度属性:opacity: 0.5;
背景颜色属性:background-color: white;
背景图片属性:background-image: url("img.png");
浮动图片:<img src="images/log.jpg" style="float: left; margin-right: 10px;" />
宽高:width: 300px;
height: 300px;字体大小:font-size: 16px;
加粗字体:font-weight: bold;网页添加背景图片,顶满网页:
body {
background-image: url("images/img.png");
background-size: cover;
background-repeat: no-repeat;
margin: 0;
padding: 0;
}
以图片为基准添加背景图片,并居中
body {
width: 751px;
height: 1024px;
background-image: url("images/add.jpg");
background-repeat: no-repeat;
background-position: center ;
}添加下面的属性后可以让所有内容都填充到 body的中部
display: grid;
place-items: center;滚轮展示内容:
div {
overflow-y: auto;
max-height: 300px;
}
不会部署的可以参考我之前的文章:同时用到,网页,java程序,数据库的web小应用
将所有要用到的图片,以及 html 页面,全部导入 web 目录中,在导入前先在浏览器上运行 html 页面看看功能是否正常,此时除了提交按钮不能点,其他按钮都是可以交互的
将所有 html 文件的后缀名改为.jsp
将 JDBC 连接数据库要用的 jar 包也导入到 WEB-INF 目录下,并 Add As Lib... ,使其能够展开才算成功导入
- import java.sql.*;
-
- public class JDBCutil {
-
- private JDBCutil(){};
-
- //建立连接并得到连接
- public static Connection getConnection() throws SQLException, ClassNotFoundException {
- Class.forName("com.mysql.jdbc.Driver");
- return DriverManager.getConnection("jdbc:mysql://localhost:3306/learnbase","root","1234");
- }
-
- //释放资源
- public static void closeRs(ResultSet rs,PreparedStatement ps,Connection conn){
- if(rs != null) {
- try {
- rs.close();
- } catch (SQLException throwables) {
- throwables.printStackTrace();
- }
- }
- if(ps == null) {
- try {
- ps.close();
- } catch (SQLException throwables) {
- throwables.printStackTrace();
- }
- }
- if(conn == null) {
- try {
- conn.close();
- } catch (SQLException throwables) {
- throwables.printStackTrace();
- }
- }
- }
-
- }
项目准备工作做好后,结构大概是这样的(其中.jsp 文件是将 html 文件改成 jsp 文件夹的)
由于有多个信息,我们可以将所有信息都封装成对象,再将对象装入集合,最后将集合发送到 jsp 中供网页展示
所以,我们首先要创建一个封装类:birthBeen
在 Servlet 包中新建 birthBeen 类
- package Servlet;
-
- public class birthBeen {
- private String name;
- private int age;
- private String birthday;
-
- public birthBeen(String name, int age, String birthday) {
- this.name = name;
- this.age = age;
- this.birthday = birthday;
- }
-
- public String getName() {
- return name;
- }
-
- public void setName(String name) {
- this.name = name;
- }
-
- public int getAge() {
- return age;
- }
-
- public void setAge(int age) {
- this.age = age;
- }
-
- public String getBirthday() {
- return birthday;
- }
-
- public void setBirthday(String birthday) {
- this.birthday = birthday;
- }
- }
这一步完成后,便可以用 JDBC 拿到数据库所有信息,并将所有信息封装后装入集合 dates (可以自己任意命名)
- package Servlet;
-
- 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.Connection;
- import java.sql.PreparedStatement;
- import java.sql.ResultSet;
- import java.sql.SQLException;
- import java.util.ArrayList;
- import java.util.List;
-
- @WebServlet("/getBirth")
- public class getBirth extends HttpServlet {
- @Override
- protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- //从数据库中获取所有人的生日
- Connection conn = null;
- PreparedStatement ps = null;
- ResultSet rs = null;
-
- List<birthBeen> dates = new ArrayList<>();
-
- try {
- conn = JDBCutil.getConnection();
- ps = conn.prepareStatement("select * from t_birthday");
- rs = ps.executeQuery();
-
- while (rs.next()){
- String name = rs.getString("name");
- int age = rs.getInt("age");
- String birthday = rs.getString("birthday");
- //封装成对象并加入集合
- dates.add(new birthBeen(name,age,birthday));
- }
- } catch (SQLException | ClassNotFoundException throwables) {
- throwables.printStackTrace();
- } finally {
- JDBCutil.closeRs(rs,ps, conn);
- }
-
- //将集合放入请求域
- request.setAttribute("dates",dates);
- //转发
- request.getRequestDispatcher("/show.jsp").forward(request,response);//这里写不需要加项目名的路径
- }
- }
这样,我们就将封装好的从数据库查询到的所有记录全部装入集合,并将集合发送到 show.jsp 中了
在Servlet目录下创建 delete 类,用于接收 删除的 get 请求,删除完后将请求重定向到查询的Servlet路径
- package Servlet;
-
- 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.Connection;
- import java.sql.PreparedStatement;
- import java.sql.SQLException;
-
- @WebServlet("/delete")
- public class delete extends HttpServlet {
- @Override
- protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- String name = request.getParameter("name");
- Connection conn = null;
- PreparedStatement ps = null;
- try {
- conn = JDBCutil.getConnection();
- ps = conn.prepareStatement("delete from t_birthday where name = ?");
- ps.setString(1,name);
- ps.executeUpdate();
- } catch (SQLException | ClassNotFoundException throwables) {
- throwables.printStackTrace();
- }finally {
- JDBCutil.closeRs(null,ps,conn);
- }
- //完成更新,重定向到show界面
- String contextPath = request.getContextPath();
- response.sendRedirect(contextPath+"/getBirth");//重定向无需加项目名
- }
- }
在 Servlet 下创建 getPost 类,用于接收浏览器发送的增加记录的 post 请求,在新增完数据后将请求重定向到查询的Servlet路径
- package Servlet;
-
- 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.Connection;
- import java.sql.PreparedStatement;
- import java.sql.SQLException;
-
- @WebServlet("/add/post")
- public class getPost extends HttpServlet {
- @Override
- protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
- Connection conn = null;
- PreparedStatement ps = null;
- request.setCharacterEncoding("UTF-8");
- String name = request.getParameter("name");
- int age = Integer.parseInt(request.getParameter("age"));
- String birthday = request.getParameter("birthday");
- try {
- conn = JDBCutil.getConnection();
- ps = conn.prepareStatement("insert into t_birthday values(?,?,?)");
- //给问号放值,下标从1开始
- ps.setString(1,name);
- ps.setInt(2,age);
- ps.setString(3,birthday);
- ps.executeUpdate();
- } catch (SQLException | ClassNotFoundException throwables) {
- throwables.printStackTrace();
- } finally {
- JDBCutil.closeRs(null,ps,conn);
- }
- //完成更新,重定向到show界面
- String contextPath = request.getContextPath();
- response.sendRedirect(contextPath+"/getBirth");//重定向无需加项目名
- }
- }
需要接收 getBirth 转发过来的集合 dates 并展示到页面
点击删除按钮需要向 /birth/delete 路径发送get请求 并删除记录
- <%@page contentType = "text/html;charset=UTF-8" %>
- <%@page import="java.util.List,Servlet.birthBeen" %>
- <!DOCTYPE html>
- <html>
-
- <head>
- <meta charset="UTF-8">
- <title>生日表查询结果</title>
- <style>
- table {
- width: 75%;
- border-collapse: collapse;
- margin: 0 auto;
- }
-
- th,
- td {
- border: 2px solid black;
- padding: 10px;
- text-align: center;
- background-color: white;
- opacity: 0.8;
- }
- body {
- background-image: url("images/img.png");
- background-size: cover;
- background-repeat: no-repeat;
- margin: 0;
- padding: 0;
- }
- h1{
- width: 50%;
- text-align : center;
- background-color: #e1a8f6;
- opacity: 0.8;
- }
- #content {
- background-color: white;
- border: 10px solid #e1a8f6;
- overflow-y: auto;
- max-height: 320px;
- margin-left: 100px;
- margin-right: 100px;
- opacity: 0.8;
- }
- .add {
- width: 300px;
- text-align : center;
- opacity: 0.8;
- }
- </style>
- <script type="text/javascript">
- function del(name){
- var flag = window.confirm("哦马吉利~曼波~你确认要删除吗");
- if(flag){
- document.location.href = "/birth/delete?name=" + name;//浏览器发送get请求
- }
- }
- </script>
- </head>
-
- <body>
-
- <div style="display: grid; place-items: center;">
- <h1>想起来了!wow~</h1>
- <button class="add" onclick="window.location.href='add.jsp'">新增</button>
- <button class="add" onclick="window.location.href='main.jsp'">返回</button>
- <br>
- </div>
- <div id="content">
- <table>
- <tr>
- <th>姓名</th>
- <th>年龄</th>
- <th>生日日期</th>
- <th>操作</th>
- </tr>
- <!-- 展示查询的结果 -->
- <%--拿到查询结果集--%>
- <%
- List<birthBeen> dates = (List<birthBeen>)request.getAttribute("dates");//注意这里返回的是 Object 类,需要强转为我们要用的类
- //记得要最在上面导入包
- for(birthBeen bb : dates){
- String name = bb.getName();
- int age = bb.getAge();
- String birthday = bb.getBirthday();
- %>
- <tr>
- <td><%=name%></td>
- <td><%=age%></td>
- <td><%=birthday%></td>
- <%-- 通过传入姓名参数给函数del发送get请求--%>
- <td><a href="javascript:void(0)" onclick="del('<%=name%>')">删除</a></td>
- </tr>
- <%
- }
- %>
- <!-- 展示查询的结果 -->
- </table>
- </div>
-
- </body>
-
- </html>
main 界面几乎没有大的改动,将按钮跳转的路径改一下即可
- <%@page contentType = "text/html;charset=UTF-8" %>
- <!DOCTYPE html>
- <html>
-
- <head>
- <meta charset="UTF-8">
- <title>小曼波生日录</title>
- <style>
- div{
- border: 10px solid #c68383;
- margin-left: 150px;
- margin-right: 150px;
- padding: 10px;
- }
- img{
- width: 50%;
- }
- input{
- background-image: url("images/log.jpg");
- width: 300px;
- height: 300px;
- font-size: 50px;
- }
- p{
- font-size: 21px;
- }
- h1{
- background-color: #c68383;
- }
- </style>
- </head>
-
- <body>
- <div>
- <img src="images/log.jpg" style="float: left; margin-right: 10px;" />
- <h1>小曼波生日录</h1>
- <p>
- 小曼波老是忘记好朋友的生日,摸摸她的脑袋,帮她回忆回忆吧!
- </p>
- <%--这里的地址需要带项目名--%>
- <form action="/birth/getBirth" method="get">
- <input type="submit" value="点击查询">
- </form>
- </div>
- </body>
-
- </html>
add 界面也是主要修改请求路径
- <%@page contentType = "text/html;charset=UTF-8" %>
- <!DOCTYPE html>
- <html>
-
- <head>
- <meta charset="UTF-8">
- <title>新增生日信息</title>
- <style>
- body {
- height: 800px;
- background-image: url("images/add.png");
- background-repeat: no-repeat;
- background-position: center ;
-
- display: grid;
- place-items: center;
- }
- div {
- border: 2px solid black;
- background-color: white;
- opacity: 0.7;
- text-align: center;
- font-weight: bold;
- padding: 10px;
- }
- form{
- width: 380px;
- }
- input{
- width: 200px;
- }
- </style>
- </head>
-
- <body>
- <div>
- <p>新增生日信息</p>
- <%-- 这里要加项目名--%>
- <form action="/birth/add/post" method="post">
- <label for="name">姓名:</label><input type="text" id="name" name="name"><br>
- <label for="age">年龄:</label><input type="number" id="age" name="age"><br>
- <label for="birthday">生日:</label><input type="String" id="birthday" name="birthday">
- <br>
- <hr>
- <input type="submit" value="提交">
- </form>
- <hr>
- <form action="/birth/getBirth" method="get">
- <input type="submit" value="返回">
- </form>
- </div>
- </body>
-
- </html>
点击运行按钮,输入网址即可运行
还在等什么,快上手试试吧!
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