diff --git "a/12 \346\236\227\344\277\212\344\274\237/0525 \347\254\254\344\270\211\346\254\241\344\275\234\344\270\232.md" "b/12 \346\236\227\344\277\212\344\274\237/0525 \347\254\254\344\270\211\346\254\241\344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..5827ca5fa614f80703381c3f57c59802799efeda
--- /dev/null
+++ "b/12 \346\236\227\344\277\212\344\274\237/0525 \347\254\254\344\270\211\346\254\241\344\275\234\344\270\232.md"	
@@ -0,0 +1,136 @@
+       public class SS extends HttpServlet {
+       @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        System.out.println("这是我数出语句");
+        resp.setContentType("Text/html;charset=utf-8");
+        PrintWriter out = resp.getWriter();
+        out.write("你接受到了一条消息");
+        out.write("<table border=1>");
+        out.write("<tr><th>编号</th><th>姓名</th><th>性别</th></tr>");
+        //查询
+        String sql="select * from studnet";
+        ResultSet qure = Text.qure(sql);
+        try {
+            while (qure.next()){
+                int id = qure.getInt("id");
+                String name = qure.getString("name");
+                String sex = qure.getString("sex");
+                out.write("<tr><td>"+id+"</td>"+"<td>"+name+"</td>"+"<td>"+sex+"</td></tr>");
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+       public class Text {
+        private static final String url="jdbc:mysql:///aaa?useSSL=false&useUnicode=true&characterEncoding=utf8";
+       private static final String username="root";
+       private static final String password="root";
+       static{
+           try {
+               Class.forName("com.mysql.jdbc.Driver");
+           } catch (ClassNotFoundException e) {
+               System.out.println("驱动包异常请检查");
+           }
+       }
+        public static Connection getcon() {
+            Connection con = null;
+            try {
+                con = DriverManager.getConnection(url, username, password);
+            } catch (SQLException e) {
+                System.out.println("连接异常'");
+            }
+            return con;
+        }
+        public static Connection conget(){
+            Connection con = null;
+            try {
+                con = DriverManager.getConnection(url, username, password);
+            } catch (SQLException e) {
+                System.out.println("连接异常");
+            }
+            return con;
+        }
+        public static <Studnt> ResultSet qure(String sql, String...keys) {//查询
+            ResultSet res = null;
+            try {
+                Connection con = conget();
+                PreparedStatement pre = con.prepareStatement(sql);
+                for (int i = 0; i < keys.length; i++) {
+                    pre.setString((i+1),keys[i]);
+                }
+                res = pre.executeQuery();
+            } catch (SQLException e) {
+                throw new RuntimeException(e);
+            }
+            return res;
+        }
+        public static int insert(String sql,String...keys) {//添加
+            int num = 0;
+            PreparedStatement pre = null;
+            try {
+                Connection con = conget();
+                pre = con.prepareStatement(sql);
+                for (int i = 0; i < keys.length; i++) {
+                    pre.setString((i + 1), keys[i]);
+                }
+                num = pre.executeUpdate();
+       } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            try {
+                pre.close();
+                conget().close();
+            } catch (SQLException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        return num;
+    }
+    public static int update(String sql,String...keys) {//修改
+        int num = 0;
+        PreparedStatement pre = null;
+        try {
+            Connection con = conget();
+            pre = con.prepareStatement(sql);
+            for (int i = 0; i < keys.length; i++) {
+                pre.setString((i + 1), keys[i]);
+            }
+            num = pre.executeUpdate();
+            pre.close();
+            conget().close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            try {
+                pre.close();
+                conget().close();
+            } catch (SQLException e) {
+                throw new RuntimeException(e);
+            }
+        }
+        return num;
+    }
+    public static int delete(String sql,String...keys) {//删除
+        int num = 0;
+        PreparedStatement pre = null;
+        try {
+            Connection con = conget();
+            pre = con.prepareStatement(sql);
+            for (int i = 0; i < keys.length; i++) {
+                pre.setString((i + 1), keys[i]);
+            }
+            num = pre.executeUpdate();
+    
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        } finally {
+            try {
+                pre.close();
+                conget().close();
+            } catch (SQLException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    
+        return num;
+    }
+    }