diff --git "a/19 \345\224\220\345\233\275\344\272\256/JDBC\344\275\234\344\270\232\357\274\232.md" "b/19 \345\224\220\345\233\275\344\272\256/JDBC\344\275\234\344\270\232\357\274\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..b3a55fc6b10d923af7c7016d64e2b50be31e0c03
--- /dev/null
+++ "b/19 \345\224\220\345\233\275\344\272\256/JDBC\344\275\234\344\270\232\357\274\232.md"	
@@ -0,0 +1,170 @@
+### JDBC作业：
+
+1. MySQL中创建一个数据库student_db
+
+2. 库中创建student表
+
+3. 表中数据如下
+
+4. | 编号 | 姓名 | 性别 |
+   | ---- | ---- | ---- |
+   | 1    | 张三 | 男   |
+   | 2    | 李四 | 女   |
+   | 3    | 王五 | 男   |
+
+5. 编写java 4个类，分别实现以下功能
+
+   1. 查询功能，查询student中所有数据
+
+   2. 添加功能
+
+   3. 修改功能
+
+   4. 删除功能
+
+      ```java
+      import java.sql.*;
+      
+      public class Select {
+          public static void main(String[] args) {
+              try {
+                  Class.forName("com.mysql.jdbc.Driver");
+                  Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/student_db?useSSL=false", "root", "root");
+                  String sql = "select * from student";
+                  Statement st = conn.createStatement();
+                  ResultSet rs = st.executeQuery(sql);
+                  while (rs.next()){
+                      int stuNo = rs.getInt("stuNo");
+                      String stuName = rs.getString("stuName");
+                      String stuSex = rs.getString("stuSex");
+                      System.out.println(stuNo +" "+ "姓名：" + stuName +" "+ "性别：" + stuSex);
+                  }
+                  rs.close();
+                  st.close();
+                  conn.close();
+              } catch (ClassNotFoundException e) {
+                  throw new RuntimeException(e);
+              } catch (SQLException e) {
+                  throw new RuntimeException(e);
+              }
+          }
+      }
+      
+      ```
+
+      ```java
+      import java.sql.*;
+      
+      public class Add {
+          public static void main(String[] args) {
+              try {
+                  Class.forName("com.mysql.jdbc.Driver");
+                  Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/student_db?useSSL=false&useUnicode=true&characterEncoding=utf8", "root", "root");
+                  String sql = "insert into student values (4,'刘高科','男'),(5,'程阳','男')";
+                  Statement st = conn.createStatement();
+                  int i = st.executeUpdate(sql);
+                  if (i >0){
+                      System.out.println("添加成功"+i+"行");
+                  }else {
+                      System.out.println("添加失败");
+                      System.out.println("添加失败"+i+"行");
+                  }
+                  st.close();
+                  conn.close();
+              } catch (ClassNotFoundException e) {
+                  throw new RuntimeException(e);
+              } catch (SQLException e) {
+                  throw new RuntimeException(e);
+              }
+          }
+      }
+      
+      ```
+
+      ```java
+      import java.sql.Connection;
+      import java.sql.DriverManager;
+      import java.sql.SQLException;
+      import java.sql.Statement;
+      
+      public class Update {
+          public static void main(String[] args) {
+              try {
+                  Class.forName("com.mysql.jdbc.Driver");
+                  Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/student_db?useSSL=false&useUnicode=true&characterEncoding=utf8", "root", "root");
+                  String sql = "update student set stuName='宋宏杨' where stuNo=3";
+                  Statement st = conn.createStatement();
+                  int i = st.executeUpdate(sql);
+                  if (i >0){
+                      System.out.println("添加成功"+i+"行");
+                  }else {
+                      System.out.println("添加失败");
+                      System.out.println("添加失败"+i+"行");
+                  }
+                  st.close();
+                  conn.close();
+              } catch (ClassNotFoundException e) {
+                  throw new RuntimeException(e);
+              } catch (SQLException e) {
+                  throw new RuntimeException(e);
+              }
+          }
+      }
+      
+      ```
+
+      ```java
+      import java.sql.Connection;
+      import java.sql.DriverManager;
+      import java.sql.SQLException;
+      import java.sql.Statement;
+      
+      public class Delete {
+          public static void main(String[] args) {
+              try {
+                  Class.forName("com.mysql.jdbc.Driver");
+                  Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/student_db?useSSL=false&useUnicode=true&characterEncoding=utf8", "root", "root");
+                  String sql = "delete from student where stuNo=4";
+                  Statement st = conn.createStatement();
+                  int i = st.executeUpdate(sql);
+                  if (i >0){
+                      System.out.println("成功删除"+i+"行");
+                  }else {
+                      System.out.println("删除失败");
+                      System.out.println("删除失败"+i+"行");
+                  }
+                  st.close();
+                  conn.close();
+              } catch (ClassNotFoundException e) {
+                  throw new RuntimeException(e);
+              } catch (SQLException e) {
+                  throw new RuntimeException(e);
+              }
+          }
+      }
+      
+      ```
+
+      ```mysql
+      create database Ok;
+      create database student_db charset utf8;
+      use student_db;
+      create table student(
+        stuNo int,
+        stuName varchar(20),
+        stuSex varchar(20)
+      );
+      insert into student values
+                              (1,'张三','男'),
+                              (2,'李四','女'),
+                              (3,'王五','男');
+      
+      
+      ```
+      
+      
+
+6. 扩展题【预习题】
+
+   1. 能否实现一个类中，用四个方法来实现上面4个类的功能
+   2. 能否实现将查询的结果，封装成java对象
\ No newline at end of file