diff --git "a/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Demo1.java" "b/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Demo1.java"
new file mode 100644
index 0000000000000000000000000000000000000000..6d95d193d3a21e842e426ef4fc96fbca33671e82
--- /dev/null
+++ "b/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Demo1.java"
@@ -0,0 +1,28 @@
+package com.java.minxi.java_20240524.java_2302_苏俊铭_2344310242;
+
+import java.sql.*;
+
+public class Demo1 {
+    public static void demo1() {
+        Connection con = null;
+        Statement stat = null;
+
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+
+            String URL = "jdbc:mysql://localhost:3306/student?" + "serverTimezone=Asia/Shanghai";
+            String username = "root";
+            String password = "123456";
+            con = DriverManager.getConnection(URL, username, password);
+
+            PreparedStatement prep = con.prepareStatement ("SELECT * FROM teacher_info");
+
+            ResultSet rs = prep.executeQuery ();
+            while (rs.next ()) {
+                System.out.println (rs.getString (1) + ", " + rs.getString (2) + ", " + rs.getString (3));
+            }
+        }catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git "a/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Demo2.java" "b/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Demo2.java"
new file mode 100644
index 0000000000000000000000000000000000000000..86fa3e6cf0d3b702d43d34165ea6f146b549d8da
--- /dev/null
+++ "b/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Demo2.java"
@@ -0,0 +1,31 @@
+package com.java.minxi.java_20240524.java_2302_苏俊铭_2344310242;
+
+import java.sql.*;
+
+public class Demo2 {
+    public static void demo2() {
+        Connection con = null;
+        PreparedStatement prep = null;
+
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+
+            String URL = "jdbc:mysql://localhost:3306/student?" + "serverTimezone=Asia/Shanghai";
+            String username = "root";
+            String password = "123456";
+            con = DriverManager.getConnection(URL, username, password);
+
+            String sql = ("SELECT * FROM teacher_info WHERE id = ? AND teacher_age = ?");
+
+            prep = con.prepareStatement(sql);
+            prep.setInt(1,1);
+            prep.setInt(2,35);
+            ResultSet rs = prep.executeQuery ();
+            while (rs.next ()) {
+                System.out.println (rs.getString (1) + ", " + rs.getString (2) + ", " + rs.getString (3));
+            }
+        }catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git "a/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Demo3.java" "b/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Demo3.java"
new file mode 100644
index 0000000000000000000000000000000000000000..a0035a1b79f652a850b49881c488e9afd39d3e24
--- /dev/null
+++ "b/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Demo3.java"
@@ -0,0 +1,42 @@
+package com.java.minxi.java_20240524.java_2302_苏俊铭_2344310242;
+
+import com.alibaba.druid.pool.DruidDataSource;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+public class Demo3 {
+    private static final String DB_URL = "jdbc:mysql://localhost:3306/student?" + "serverTimezone=Asia/Shanghai";
+    private static final String USER = "root";
+    private static final String PASSWORD = "123456";
+
+
+
+    public static void demo3() {
+        try {
+            DruidDataSource dataSource = new DruidDataSource();
+            dataSource.setUrl ("jdbc:mysql://localhost:3306/student?" + "serverTimezone=Asia/Shanghai");
+            dataSource.setUsername ("root");
+            dataSource.setPassword ("123456");
+            dataSource.setInitialSize(5);
+            dataSource.setMaxActive(20);
+            dataSource.setMinIdle(5);dataSource.init ();
+
+            Connection conn = dataSource.getConnection ();
+            String sql = "update teacher_info set teacher_name = ? where id = ?";
+            PreparedStatement pstmt = conn.prepareStatement (sql);
+
+            pstmt.setString (1, "小严");
+            pstmt.setInt (2, 3);
+
+            int updatedRows = pstmt.executeUpdate ();
+            if (updatedRows > 0) {
+                System.out.println ("执行成功");
+            }
+        } catch (Exception e) {
+            e.printStackTrace ();
+        }
+    }
+}
diff --git "a/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Main.java" "b/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Main.java"
new file mode 100644
index 0000000000000000000000000000000000000000..8607bc10525fd02ffb2750e14f0d44772a427e4d
--- /dev/null
+++ "b/work/com/java/minxi/java_20240524/java_2302_\350\213\217\344\277\212\351\223\255_2344310242/Main.java"
@@ -0,0 +1,15 @@
+package com.java.minxi.java_20240524.java_2302_苏俊铭_2344310242;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.Statement;
+
+public class Main {
+    public static void main(String[] args) {
+        Demo1.demo1();
+        System.out.println("---------------");
+        Demo2.demo2();
+        System.out.println("---------------");
+        Demo3.demo3();
+    }
+}