diff --git "a/13 \345\274\240\345\276\267\345\272\267/20230607 \344\275\234\344\270\232.md" "b/13 \345\274\240\345\276\267\345\272\267/20230607 \344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..97a09f122ab9ff19a4c322a2e5be26f0510a6da6
--- /dev/null
+++ "b/13 \345\274\240\345\276\267\345\272\267/20230607 \344\275\234\344\270\232.md"	
@@ -0,0 +1,259 @@
+```
+package bean;
+
+public class Hinfo {
+    private int id; //编号
+    private String lease;//租赁
+    private double rent;//祖金
+    private String contacts;//联系人
+    private String deposit;//押金
+    private int houseid;//房屋
+    private String address;//地址
+
+    public Hinfo(int id, String lease, double rent, String contacts, String deposit, int houseid, String address) {
+        this.id = id;
+        this.lease = lease;
+        this.rent = rent;
+        this.contacts = contacts;
+        this.deposit = deposit;
+        this.houseid = houseid;
+        this.address = address;
+    }
+
+    public Hinfo() {
+    }
+
+
+    @Override
+    public String toString() {
+        return "Hinfo{" +
+                "id=" + id +
+                ", lease='" + lease + '\'' +
+                ", rent=" + rent +
+                ", contacts='" + contacts + '\'' +
+                ", deposit='" + deposit + '\'' +
+                ", houseid=" + houseid +
+                ", address='" + address + '\'' +
+                '}';
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getLease() {
+        return lease;
+    }
+
+    public void setLease(String lease) {
+        this.lease = lease;
+    }
+
+    public double getRent() {
+        return rent;
+    }
+
+    public void setRent(double rent) {
+        this.rent = rent;
+    }
+
+    public String getContacts() {
+        return contacts;
+    }
+
+    public void setContacts(String contacts) {
+        this.contacts = contacts;
+    }
+
+    public String getDeposit() {
+        return deposit;
+    }
+
+    public void setDeposit(String deposit) {
+        this.deposit = deposit;
+    }
+
+    public int getHouseid() {
+        return houseid;
+    }
+
+    public void setHouseid(int houseid) {
+        this.houseid = houseid;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(String address) {
+        this.address = address;
+    }
+}
+package bean;
+
+public class Htype {
+    private int id;
+    private String type;
+
+    public Htype(int id, String type) {
+        this.id = id;
+        this.type = type;
+    }
+
+    public Htype() {
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    @Override
+    public String toString() {
+        return "Htype{" +
+                "id=" + id +
+                ", type='" + type + '\'' +
+                '}';
+    }
+}
+package servlet;
+
+import utils.DBUtil;
+
+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 list extends HttpServlet {
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        String sql="select * from house_info i,house_type t where i.id=t.id";
+        ResultSet rs = DBUtil.query(sql);
+        ArrayList<Object> list = new ArrayList<>();
+        while (rs.next()){
+
+                int id =rs.getInt(1);
+                String mode =rs.getNString(2);
+                int rent =rs.getInt(3);
+                String contacts =rs.getNString(4);
+                String deposit =rs.getNString(5);
+                int house =rs.getInt(6);
+                int add =rs.getInt(7);
+                int tid =rs.getInt(8);
+                String type =rs.getNString(9);
+                Object info = new Object(id, mode, rent, contacts, deposit, house, add, tid, type);
+                list.add(info);
+        }
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+    }
+}
+package utils;
+
+import java.sql.*;
+
+public class DBUtil {
+//    1.定义主机 用户名 密码
+    static String url="jdbc:mysql///test?characterEncoding=utf8";
+    static String user="root";
+    static String pwd="root";
+//    2.获取连接对象
+    static {
+    try {
+        Class.forName("com.mysql.jdbc.Driver");
+    } catch (ClassNotFoundException e) {
+        throw new RuntimeException(e);
+    }
+}
+//    3.获取连接对象
+    public static Connection getConn() throws SQLException {
+        Connection conn = DriverManager.getConnection(url, user, pwd);
+        return conn;
+    }
+//    4.通用查询
+    public static ResultSet query(String sql, Object...keys) {
+        //拿连接
+        ResultSet rs;
+        try {
+            Connection conn = getConn();
+            //执行sql
+            PreparedStatement pst = conn.prepareStatement(sql);
+            //遍历keys
+            for (int i = 0; i < keys.length; i++) {
+                pst.setObject((i + 1), keys[i]);
+
+            }
+            rs = pst.executeQuery();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return rs;
+    }
+
+}
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+<%--
+  Created by IntelliJ IDEA.
+  User: Administrator
+  Date: 2023-06-07
+  Time: 11:08
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+    <title>Title</title>
+</head>
+<body>
+<a href="/list"><button>添加</button></a>
+<table>
+    <tr>
+        <th>编号</th>
+        <th>租赁方式</th>
+        <th>租金</th>
+        <th>联系人</th>
+        <th>押金方式</th>
+        <th>房屋类型</th>
+        <th>详细地址</th>
+    </tr>
+    <c:forEach items="${list}" var="h">
+        <tr>
+            <td>${h.id}</td>
+            <td>${h.lease}</td>
+            <td>${h.rent}</td>
+            <td>${h.contacts}</td>
+            <td>${h.deposit}</td>
+            <td>${h.houseid}</td>
+            <td>${h.address}</td>
+        </tr>
+    </c:forEach>
+</table>
+
+</body>
+</html>
+
+```
+