diff --git "a/30 \350\256\270\346\201\251\346\260\221/\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232.md" "b/30 \350\256\270\346\201\251\346\260\221/\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232.md"
new file mode 100644
index 0000000000000000000000000000000000000000..b162a9c1be04afe33fa04139e65153ab0ca25017
--- /dev/null
+++ "b/30 \350\256\270\346\201\251\346\260\221/\347\254\254\345\233\233\346\254\241\344\275\234\344\270\232.md"	
@@ -0,0 +1,68 @@
+```java
+package day525;
+
+import javax.servlet.*;
+import javax.servlet.http.*;
+import javax.servlet.annotation.*;
+import java.io.IOException;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+@WebServlet(name = "httpServlet", value = "/httpServlet")
+public class httpServlet extends HttpServlet {
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        response.setContentType("text/html;charset=utf-8");
+        response.setCharacterEncoding("utf-8");
+        try {
+            String sql = "select * from student";
+            ResultSet rs = DB.query(sql);
+            while (rs.next()) {
+                int id = rs.getInt("id");
+                String name = rs.getString("name");
+                String sex = rs.getString("sex");
+                response.getWriter().write(id + sex + name);
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+        request.setCharacterEncoding("utf-8");
+        String id = request.getParameter("id");
+        String name = request.getParameter("name");
+        String sex = request.getParameter("sex");
+        String sql = "insert into student values(?,?,?)";
+        response.setContentType("text/html;charset=utf-8");
+        try {
+            int i = DB.update(sql, id, name, sex);
+            if (i > 0) {
+                response.getWriter().write("添加成功");
+            } else {
+                response.getWriter().write("添加失败");
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        //删除功能
+
+        id = request.getParameter("id");
+        name = request.getParameter("name");
+        sql = "delete from student where id=?";
+        response.setContentType("text/html;charset=utf-8");
+        int i= 0;
+        try {
+            i = DB.update(sql, id);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        if (i > 0) {
+            response.getWriter().write("删除成功");
+        } else {
+            response.getWriter().write("删除失败");
+        }
+    }
+}
+```
\ No newline at end of file