diff --git a/s-day11/src/com/inmind/udp02/UdpClientDemo04.java b/s-day11/src/com/inmind/udp02/UdpClientDemo04.java
new file mode 100644
index 0000000..a0a0f85
--- /dev/null
+++ b/s-day11/src/com/inmind/udp02/UdpClientDemo04.java
@@ -0,0 +1,46 @@
+package com.inmind.udp02;
+
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.util.Scanner;
+
+/*
+UDP多发多收
+ */
+public class UdpClientDemo04 {
+    public static void main(String[] args) throws Exception {
+        //1.创建客户端对象
+        DatagramSocket ds = new DatagramSocket();
+        //2.创建数据包发送数据
+        Scanner sc = new Scanner(System.in);
+
+        //3.不停地发，用户输入什么就发送什么
+        while (true) {
+            System.out.println("请输入：");
+            String line = sc.nextLine();//阻塞
+
+            if ("exit".equals(line)) {//这样写避免了空指针异常的可能性
+                break;
+            }
+
+            byte[] bytes = line.getBytes();
+            /*
+        public DatagramPacket(byte buf[], int offset, int length,
+                          InetAddress address, int port)
+          参数一：封装要发出去的数据
+          参数二：发送出去的数据大小（字节个数）
+          参数三：服务端的IP地址（找到服务器主机）
+          参数四：服务端程序的端口号
+         */
+            DatagramPacket dp = new DatagramPacket(
+                    bytes, bytes.length,
+                    InetAddress.getByName("192.168.23.107"), 10023);
+            //4.开始正式发送数据包
+            ds.send(dp);
+        }
+
+
+        System.out.println("程序结束");
+    }
+}
diff --git a/s-day11/src/com/inmind/udp02/UdpServerDemo05.java b/s-day11/src/com/inmind/udp02/UdpServerDemo05.java
new file mode 100644
index 0000000..326002d
--- /dev/null
+++ b/s-day11/src/com/inmind/udp02/UdpServerDemo05.java
@@ -0,0 +1,27 @@
+package com.inmind.udp02;
+
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+
+//启动服务器，不停地获取客户端的信息
+public class UdpServerDemo05 {
+    public static void main(String[] args) throws Exception {
+        System.out.println("服务器启动");
+        //1.创建服务器对象
+        DatagramSocket ds = new DatagramSocket(10023);
+        //2.不停地获取数据包
+        byte[] buffer = new byte[1024 * 64];
+        while (true) {
+            //3.创建出一个数据包，用于接收客户端的数据
+            DatagramPacket dp = new DatagramPacket(buffer, buffer.length);
+            //4.服务器正式接收数据包
+            ds.receive(dp);
+            //5.将字节数据转为字符，并显示对应客户端的信息
+            int length = dp.getLength();//获取数据包中字节数据的长度
+            String result = new String(buffer, 0, length);
+            System.out.println(dp.getPort());//获取数据包的端口
+            System.out.println(dp.getAddress().getHostAddress());//获取数据包的IP地址
+            System.out.println(result);
+        }
+    }
+}