diff --git a/netty/service/src/main/java/cn/bunny/service/netty/demo3/ByteCompositeByteBuff.java b/netty/service/src/main/java/cn/bunny/service/netty/demo3/ByteCompositeByteBuff.java
new file mode 100644
index 0000000..81fa17f
--- /dev/null
+++ b/netty/service/src/main/java/cn/bunny/service/netty/demo3/ByteCompositeByteBuff.java
@@ -0,0 +1,24 @@
+package cn.bunny.service.netty.demo3;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufAllocator;
+import io.netty.buffer.CompositeByteBuf;
+
+import static cn.bunny.service.NettyLogUtil.log;
+
+public class ByteCompositeByteBuff {
+
+    public static void main(String[] args) {
+        ByteBuf buf1 = ByteBufAllocator.DEFAULT.buffer();
+        buf1.writeBytes(new byte[]{1, 2, 3, 4, 5});
+
+        ByteBuf buf2 = ByteBufAllocator.DEFAULT.buffer();
+        buf2.writeBytes(new byte[]{6, 7, 8, 9, 10});
+
+        // 将前两个字节拼接在一起
+        CompositeByteBuf buffer = ByteBufAllocator.DEFAULT.compositeBuffer();
+        buffer.addComponents(true, buf1, buf2);
+
+        log(buffer);
+    }
+}