diff --git "a/work/com/java/minxi/java_20240418/java_2302_\351\231\210\351\233\205\345\256\276_2344310213/Main.java" "b/work/com/java/minxi/java_20240418/java_2302_\351\231\210\351\233\205\345\256\276_2344310213/Main.java"
index 103a422f6fd07e7bb4aa8bae35e0c0eb3e2ecf2d..e8d0c8fdf8826f7d488a8a864b2dfc06d2a69573 100644
--- "a/work/com/java/minxi/java_20240418/java_2302_\351\231\210\351\233\205\345\256\276_2344310213/Main.java"
+++ "b/work/com/java/minxi/java_20240418/java_2302_\351\231\210\351\233\205\345\256\276_2344310213/Main.java"
@@ -23,8 +23,6 @@ public class Main {
         student3.sex = "女";
         student3.sleeping();
 
-        System.out.println("对象1"+student1);
-        System.out.println("对象2"+student2);
-        System.out.println("对象3"+student3);
+
     }
 }
diff --git "a/work/com/java/minxi/java_20240524/java_2302_\351\231\210\351\233\205\345\256\276_2344310213/Main.java" "b/work/com/java/minxi/java_20240524/java_2302_\351\231\210\351\233\205\345\256\276_2344310213/Main.java"
new file mode 100644
index 0000000000000000000000000000000000000000..bad5cba636879f37dd0facc5e8c61e4bc7992d31
--- /dev/null
+++ "b/work/com/java/minxi/java_20240524/java_2302_\351\231\210\351\233\205\345\256\276_2344310213/Main.java"
@@ -0,0 +1,105 @@
+package com.java.minxi.java_20240524.java_2302_陈雅宾_2344310213;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Main {
+    public static void main(String[] args) {
+        bdDemo();
+        bdDemo2();
+        bdDemo3();
+    }
+
+    public static void bdDemo(){
+        Connection connection = null;
+        Statement statement = 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";
+            connection = DriverManager.getConnection(URL,username,password);
+            // 查询所有用户的信息;
+
+            // 查询id为1，且年龄为35岁的用户信息；
+            // 把id为3的用户名称修改为小严；
+            String sql3 = "update teacher_info set teacher_name = '小严' where id = 3";
+            statement = connection.createStatement();
+            int rs = statement.executeUpdate(sql3);
+            if (rs > 0){
+                System.out.println("执行成功");
+            }else {
+                System.out.println("执行失败");
+            }
+        }catch (Exception e){
+            e.printStackTrace();
+        }finally {
+            try {
+                statement.close();
+                connection.close();
+            }catch (Exception e){
+                e.printStackTrace();
+            }
+        }
+    }
+    public static void bdDemo2() {
+        Connection connection = null;
+        Statement statement1 = 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";
+            connection = DriverManager.getConnection(URL,username,password);
+            // 查询所有用户的信息;
+            String sql = "select id,teacher_name,teacher_age from teacher_info";
+            statement1 = connection.createStatement();
+            ResultSet resultSet = statement1.executeQuery(sql);
+            while (resultSet.next()){
+                int id = resultSet.getInt("id");
+                String name = resultSet.getString("teacher_name");
+                String age = resultSet.getString("teacher_age");
+                System.out.println(id);
+                System.out.println(name);
+                System.out.println(age);
+            }
+            resultSet.close();
+            statement1.close();
+            connection.close();
+        }catch (Exception e){
+            e.printStackTrace();
+        }
+    }
+    public static void bdDemo3() {
+        Connection connection = null;
+        Statement statement2 = 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";
+            connection = DriverManager.getConnection(URL,username,password);
+            // 查询所有用户的信息;
+            String sql = "select id,teacher_name,teacher_age from teacher_info where id = 1 and teacher_age = 35";
+            statement2 = connection.createStatement();
+            ResultSet resultSet = statement2.executeQuery(sql);
+            while (resultSet.next()){
+                int id = resultSet.getInt("id");
+                String name = resultSet.getString("teacher_name");
+                String age = resultSet.getString("teacher_age");
+                System.out.println(id);
+                System.out.println(name);
+                System.out.println(age);
+            }
+            resultSet.close();
+            statement2.close();
+            connection.close();
+        }catch (Exception e){
+            e.printStackTrace();
+        }
+    }
+}