diff --git "a/13 \345\274\240\345\276\267\345\272\267/20230517 \351\251\261\345\212\250.md" "b/13 \345\274\240\345\276\267\345\272\267/20230517 \351\251\261\345\212\250.md"
new file mode 100644
index 0000000000000000000000000000000000000000..566514b4b953e35f186d4e276d6464e27f982b77
--- /dev/null
+++ "b/13 \345\274\240\345\276\267\345\272\267/20230517 \351\251\261\345\212\250.md"	
@@ -0,0 +1,68 @@
+```java
+import java.sql.*;
+
+public class words {
+    public static void main(String[] args) {
+        try {
+            Statement stmt = register();
+            select(stmt);
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException(e);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+    public static Statement register() throws ClassNotFoundException, SQLException {
+        Class.forName("com.mysql.jdbc.Driver");
+        //2.链接对象
+        String url ="jdbc:mysql://localhost:3306/test";
+        String username ="root";
+        String password ="root";
+        Connection conn = DriverManager.getConnection(url, username, password);
+        Statement stmt = conn.createStatement();
+        return stmt;
+    }
+    public static void select(Statement stmt) throws SQLException {
+        String sql = "select * from student";
+        ResultSet rs = stmt.executeQuery(sql);
+        while (rs.next()) {
+            int id =rs.getInt("id");
+            String name = rs.getString("name");
+            String sex = rs.getString("sex");
+            System.out.println(id+" "+name+" "+sex);
+        }
+    }
+
+    public static void insert(Statement stmt) throws SQLException {
+        String sql="insert into student values (4,'唐','女')";
+        int i = stmt.executeUpdate(sql);
+        if (i>0){
+            System.out.println("成功添加");
+        }else{
+            System.out.println("失败");
+        }
+    }
+
+    public static void update(Statement stmt) throws SQLException {
+        String sql="update student set sex='男' where id=2";
+        int i = stmt.executeUpdate(sql);
+        if (i>0){
+            System.out.println("修改成功");
+        }else {
+            System.out.println("失败");
+        }
+    }
+
+    public static void deletes(Statement stmt) throws SQLException {
+        String sql="deletes from student where id=1 ";
+        int i = stmt.executeUpdate(sql);
+        if (i>0){
+            System.out.println("删除成功");
+        }else {
+            System.out.println("失败");
+        }
+    }
+}
+
+```
+
diff --git "a/13 \345\274\240\345\276\267\345\272\267/20230520 \344\275\234\344\270\232.md" "b/13 \345\274\240\345\276\267\345\272\267/20230520 \344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..6bb3b5537cb725df0c053f00438d2190c8822388
--- /dev/null
+++ "b/13 \345\274\240\345\276\267\345\272\267/20230520 \344\275\234\344\270\232.md"	
@@ -0,0 +1,80 @@
+```
+import java.sql.*;
+
+public class words {
+    public static void main(String[] args) {
+        try {
+            Statement stmt = register();
+            select(stmt);
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException(e);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+        public static Statement register() throws ClassNotFoundException, SQLException {
+        Class.forName("com.mysql.jdbc.Driver");
+        //2.链接对象
+        String url ="jdbc:mysql://localhost:3306/test";
+        String username ="root";
+        String password ="root";
+        Connection conn = DriverManager.getConnection(url, username, password);
+        Statement stmt = conn.createStatement();
+        return stmt;
+    }
+    public class test {
+    private int age;
+    private String name;
+    private String sex;
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getSex() {
+        return sex;
+    }
+
+    public void setSex(String sex) {
+        this.sex = sex;
+    }
+
+    @Override
+    public String toString() {
+        return "test{" +
+                "age=" + age +
+                ", name='" + name + '\'' +
+                ", sex='" + sex + '\'' +
+                '}';
+    }
+
+    public test(int age, String name, String sex) {
+        this.age = age;
+        this.name = name;
+        this.sex = sex;
+    }
+
+    public test() {
+    }
+    class te extends test{
+        @Override
+        public int getAge() {
+            return super.getAge();
+        }
+    }
+}
+
+```
+