diff --git "a/17 \345\221\250\345\257\214/JDBC\344\275\234\344\270\232\357\274\232.md" "b/17 \345\221\250\345\257\214/JDBC\344\275\234\344\270\232\357\274\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..ecc53ccfa800592ec6dee7f9848175bc98bdd9a5
--- /dev/null
+++ "b/17 \345\221\250\345\257\214/JDBC\344\275\234\344\270\232\357\274\232.md"	
@@ -0,0 +1,201 @@
+### JDBC作业：
+
+1. MySQL中创建一个数据库student_db
+
+   ~~~ sql
+   CREATE database student_db charset utf8;
+   use student_db;
+   ~~~
+
+   
+
+2. 库中创建student表
+
+   ~~~ sql
+   CREATE TABLE student(
+   id int,
+   name varchar(20),
+   sex char
+   );
+   ~~~
+
+   
+
+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   |
+
+   ~~~ sql
+   INSERT into student VALUES(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
+
+      ~~~ JAVA
+      import java.sql.*;
+      
+      public class Select {
+          public static void main(String[] args) {
+              Connection conn=null;
+              Statement sta=null;
+              ResultSet res=null;
+              try {
+                  Class.forName("com.mysql.jdbc.Driver");
+                  String url="jdbc:mysql://localhost:3306/student_db?useSSL=false";
+                  String username="root";
+                  String password="root";
+                   conn = DriverManager.getConnection(url, username, password);
+                  String sql="select * from student";
+                   sta = conn.createStatement();
+                   res = sta.executeQuery(sql);
+                  while (res.next()){
+                      int id = res.getInt("id");
+                      String name=res.getString("name");
+                      String sex=res.getString("sex");
+                      System.out.println(id+"-"+name+"-"+sex);
+                  }
+      
+              } catch (ClassNotFoundException e) {
+                  System.out.println("驱动错误");
+                  e.printStackTrace();
+              } catch (SQLException e) {
+                  System.out.println("语法错误");
+                  e.printStackTrace();
+              }
+              try {
+                  if (res!=null){
+                  res.close();}
+                  if (sta!=null){
+                  sta.close();}
+                  if(conn!=null){
+                  conn.close();}
+              } catch (Exception e) {
+                  System.out.println("释放异常");
+              }
+      
+          }
+      }
+      ~~~
+
+   2. 添加功能
+
+      ~~~ java
+      import java.sql.*;
+      
+      public class insert {
+          public static void main(String[] args) {
+      
+      
+              try {
+                  Class.forName("com.mysql.jdbc.Driver");
+                  String url="jdbc:mysql://localhost:3306/student_db?useSSL=false&useUnicode=true&characterEncoding=utf8";
+                  String username="root";
+                  String password="root";
+                  Connection conn = DriverManager.getConnection(url, username, password);
+                  String sql="insert into student values(4,'赵六','男')";
+                  Statement sta = conn.createStatement();
+                  int i = sta.executeUpdate(sql);
+                  if (i>0){
+                      System.out.println("添加成功");
+                  }else {
+                      System.out.println("添加失败");
+                  }
+      
+              } catch (ClassNotFoundException e) {
+                  System.out.println("驱动错误");
+              } catch (SQLException e) {
+                  System.out.println("语法错误");
+              }
+      
+      
+          }
+      }
+      
+      ~~~
+      
+   3. 修改功能
+   
+      ~~~ 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");
+                  String url="jdbc:mysql://localhost:3306/student_db?useSSL=false&useUnicode=true&characterEncoding=utf8";
+                  String username="root";
+                  String password="root";
+                  Connection conn = DriverManager.getConnection(url, username, password);
+                  String sql="update student set name='小民' where id=4";
+                  Statement sta = conn.createStatement();
+                  int i = sta.executeUpdate(sql);
+                  if (i>0){
+                      System.out.println("修改成功");
+                  }else {
+                      System.out.println("修改失败");
+                  }
+      
+              } catch (ClassNotFoundException e) {
+                  System.out.println("驱动错误");
+              } catch (SQLException e) {
+                  System.out.println("语法错误");
+              }
+          }
+      }
+      
+      ~~~
+      
+      
+      
+   4. 删除功能
+   
+      ~~~ 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");
+                  String url="jdbc:mysql://localhost:3306/student_db?useSSL=false&useUnicode=true&characterEncoding=utf8";
+                  String username="root";
+                  String password="root";
+                  Connection conn = DriverManager.getConnection(url, username, password);
+                  String sql="delete from student where name='小民'";
+                  Statement sta = conn.createStatement();
+                  int i = sta.executeUpdate(sql);
+                  if (i>0){
+                      System.out.println("删除成功");
+                  }else {
+                      System.out.println("删除失败");
+                  }
+      
+              } catch (ClassNotFoundException e) {
+                  System.out.println("驱动错误");
+              } catch (SQLException e) {
+                  System.out.println("语法错误");
+              }
+          }
+      }
+      
+      ~~~
+      
+      
+   
+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