diff --git "a/05 \350\260\242\351\223\226\346\265\251/20230607 \350\200\203\345\213\244\347\263\273\347\273\237.md" "b/05 \350\260\242\351\223\226\346\265\251/20230607 \350\200\203\345\213\244\347\263\273\347\273\237.md"
new file mode 100644
index 0000000000000000000000000000000000000000..1ecc1523459efea8a8024e236c75e50799ac6aa2
--- /dev/null
+++ "b/05 \350\260\242\351\223\226\346\265\251/20230607 \350\200\203\345\213\244\347\263\273\347\273\237.md"	
@@ -0,0 +1,306 @@
+~~~ java
+数据库
+create database AttDB charset utf8;
+use AttDB;
+create table Student
+(
+    sid   int primary key auto_increment,
+    sname varchar(20) not null unique
+);
+create table Attence
+(
+    aid int primary key auto_increment,
+    time varchar (20) not null ,
+    type int comment '1:已到；2:迟到；3旷课',
+    sid int,
+    foreign key (sid) references Student(sid)
+);
+insert into Student values
+                        (null,"张三"),
+                        (null,"李四"),
+                        (null,"王五");
+insert into Attence values
+                        (null,'2022-05-20 08:20:00',1,1),
+                        (null,'2022-05-20 08:20:00',2,2),
+                        (null,'2022-05-23 13:40:00',3,3);
+
+
+
+//标准类Attence
+package bean;
+
+public class Attence {
+    int aid;
+    String time;
+    int type;
+    int sid;
+    String sname;
+
+    @Override
+    public String toString() {
+        return "Attence{" +
+                "aid=" + aid +
+                ", time='" + time + '\'' +
+                ", type=" + type +
+                ", sid=" + sid +
+                ", sname='" + sname + '\'' +
+                '}';
+    }
+
+    public int getAid() {
+        return aid;
+    }
+
+    public void setAid(int aid) {
+        this.aid = aid;
+    }
+
+    public String getTime() {
+        return time;
+    }
+
+    public void setTime(String time) {
+        this.time = time;
+    }
+
+    public int getType() {
+        return type;
+    }
+
+    public void setType(int type) {
+        this.type = type;
+    }
+
+    public int getSid() {
+        return sid;
+    }
+
+    public void setSid(int sid) {
+        this.sid = sid;
+    }
+
+    public String getSname() {
+        return sname;
+    }
+
+    public void setSname(String sname) {
+        this.sname = sname;
+    }
+
+    public Attence() {
+    }
+
+    public Attence(int aid, String time, int type, int sid, String sname) {
+        this.aid = aid;
+        this.time = time;
+        this.type = type;
+        this.sid = sid;
+        this.sname = sname;
+    }
+}
+
+//标准类Student
+package bean;
+
+public class Student {
+    int sid;
+    String sname;
+
+    @Override
+    public String toString() {
+        return "Student{" +
+                "sid=" + sid +
+                ", sname='" + sname + '\'' +
+                '}';
+    }
+
+    public int getSid() {
+        return sid;
+    }
+
+    public void setSid(int sid) {
+        this.sid = sid;
+    }
+
+    public String getSname() {
+        return sname;
+    }
+
+    public void setSname(String sname) {
+        this.sname = sname;
+    }
+
+    public Student() {
+    }
+
+    public Student(int sid, String sname) {
+        this.sid = sid;
+        this.sname = sname;
+    }
+}
+
+
+
+//工具类DBUtils
+package utils;
+
+import java.sql.*;
+
+public class DBUtils {
+    //定义数据库地址，用户名，密码，字符集
+        private static final String url = "jdbc:mysql:///AttDB?useSSL=false&useUnicode=true&characterEncoding=utf8";
+        private static final String username = "root";
+        private static final String password = "root";
+
+    //注册驱动
+        static {
+        try {
+            Class.forName("com.mysql.jdbc.Driver");
+        } catch (ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+    }
+    //获取连接对象的方法
+    public static Connection getConn() throws SQLException {
+        Connection conn = DriverManager.getConnection(url, username, password);
+        return conn;
+    }
+
+    //获取通用查询的方法
+    public static ResultSet query(String sql, Object... keys) {
+        //获取连接对象
+        ResultSet rs = null;
+        try {
+            Connection conn = getConn();
+            //获取执行sql语句的对象
+            PreparedStatement pst = conn.prepareStatement(sql);
+            //便利参数，把参数赋值给？号
+            for (int i = 0; i < keys.length; i++) {
+                pst.setObject((i + 1), keys[i]);
+            }
+            //执行sql语句
+            rs = pst.executeQuery();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return rs;
+    }
+
+    //获取通用更新的方法
+    public static int update(String sql, Object... keys) {
+        //获取连接对象
+        int num = 0;
+        try {
+            Connection conn = getConn();
+            //获取执行sql语句的对象
+            PreparedStatement pst = conn.prepareStatement(sql);
+            //便利参数，把参数赋值给？号
+            for (int i = 0; i < keys.length; i++) {
+                pst.setObject((i + 1), keys[i]);
+            }
+            //执行sql语句
+            num = pst.executeUpdate();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return num;
+    }
+}
+
+
+
+//显示考勤列表的servlet
+package servlet;
+
+import bean.Attence;
+import utils.DBUtils;
+
+import javax.servlet.*;
+import javax.servlet.http.*;
+import javax.servlet.annotation.*;
+import java.io.IOException;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+
+@WebServlet("/list")
+public class ListServlet extends HttpServlet {
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        //查询数据库
+        String sql = "select * from attence a inner join student b on a.sid = b.sid;";
+        ResultSet rs = DBUtils.query(sql);
+        //设置一个集合
+        ArrayList<Attence> list = new ArrayList<>();
+        //将结果集封装到集合
+        try {
+            while (rs.next()){
+                int aid = rs.getInt("aid");
+                String time = rs.getString("time");
+                int type = rs.getInt("type");
+                int sid = rs.getInt("sid");
+                String sname = rs.getString("sname");
+                Attence attence = new Attence(aid,time,type,sid,sname);
+                list.add(attence);
+            }
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        //将集合添加到request域中
+        request.setAttribute("list",list);
+        //请求转发给一个jsp
+        request.getRequestDispatcher("/WEB-INF/list.jsp").forward(request,response);
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+    }
+}
+
+
+
+<%--显示考勤列表的jsp--%>
+
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+    <title>考勤列表</title>
+</head>
+<body>
+<a href="">添加</a>
+    <table border="1">
+        <tr>
+            <td>考勤编号</td>
+            <td>学生编号</td>
+            <td>学生姓名</td>
+            <td>出勤时间</td>
+            <td>出勤状况</td>
+        </tr>
+        <c:forEach items="${list}" var="li">
+            <tr>
+                <td>${li.aid}</td>
+                <td>${li.sid}</td>
+                <td>${li.sname}</td>
+                <td>${li.time}</td>
+                <td>
+                    <c:if test="${li.type==1}">
+                        已到
+                    </c:if>
+                    <c:if test="${li.type==2}">
+                        迟到
+                    </c:if>
+                    <c:if test="${li.type==3}">
+                        旷课
+                    </c:if>
+                </td>
+            </tr>
+        </c:forEach>
+    </table>
+
+</body>
+</html>
+~~~
+