diff --git a/pom.xml b/pom.xml
index b172fed..5e1b286 100644
--- a/pom.xml
+++ b/pom.xml
@@ -35,6 +35,12 @@
5.8.27
+
+ io.netty
+ netty-all
+ 4.1.72.Final
+
+
junit
junit
diff --git a/src/main/java/com/zhangmeng/service/DataPack.java b/src/main/java/com/zhangmeng/service/DataPack.java
new file mode 100644
index 0000000..6b51be2
--- /dev/null
+++ b/src/main/java/com/zhangmeng/service/DataPack.java
@@ -0,0 +1,18 @@
+package com.zhangmeng.service;
+
+/**
+ * 封包数据和拆包数据
+ * 直接面向TCP连接中的数据流,为传输数据添加头部信息，用于处理TCP粘包问题。
+ *
+ * @author zm
+ * @date 2025/2/22 17:33
+ * @version: 1.0
+ */
+public interface DataPack {
+ public int GetHeadLen(); //获取包头长度方法
+
+ public byte[] Pack(Message msg); //封包方法
+
+ public Message Unpack(byte[] data); //拆包方法
+
+}
diff --git a/src/main/java/com/zhangmeng/service/Message.java b/src/main/java/com/zhangmeng/service/Message.java
new file mode 100644
index 0000000..e0f550c
--- /dev/null
+++ b/src/main/java/com/zhangmeng/service/Message.java
@@ -0,0 +1,24 @@
+package com.zhangmeng.service;
+
+/**
+ * 将请求的一个消息封装到message中，定义抽象层接口
+ *
+ * @author zm
+ * @date 2025/2/22 17:26
+ * @version: 1.0
+ */
+public interface Message {
+
+ public int GetDataLen(); //获取消息数据段长度
+
+ public int GetMsgId(); //获取消息ID
+
+ public byte[] GetData(); //获取消息内容
+
+ public void SetMsgId(int msgId); //设计消息ID
+
+ public void SetData(byte[] bytes); //设计消息内容
+
+ public void SetDataLen(int length); //设置消息数据段长度
+
+}
diff --git a/src/main/java/com/zhangmeng/service/impl/DataPackImpl.java b/src/main/java/com/zhangmeng/service/impl/DataPackImpl.java
new file mode 100644
index 0000000..de8d6de
--- /dev/null
+++ b/src/main/java/com/zhangmeng/service/impl/DataPackImpl.java
@@ -0,0 +1,44 @@
+package com.zhangmeng.service.impl;
+
+import com.zhangmeng.service.DataPack;
+import com.zhangmeng.service.Message;
+
+
+import java.nio.ByteBuffer;
+
+/**
+ * @author zm
+ * @date 2025/2/22 17:36
+ * @version: 1.0
+ */
+public class DataPackImpl implements DataPack {
+
+ @Override
+ public int GetHeadLen() {
+ return 8;
+ }
+
+ @Override
+ public byte[] Pack(Message msg) {
+
+ ByteBuffer byteBuffer = ByteBuffer.allocate(16);
+
+ //写dataLen
+ byteBuffer.putInt(msg.GetDataLen());
+
+ //写msgID
+ byteBuffer.putInt(msg.GetMsgId());
+
+ //写data
+ byteBuffer.put(msg.GetData());
+
+
+ byte[] data = byteBuffer.array();
+ return data;
+ }
+
+ @Override
+ public Message Unpack(byte[] data) {
+ return null;
+ }
+}
diff --git a/src/main/java/com/zhangmeng/service/impl/MessageImpl.java b/src/main/java/com/zhangmeng/service/impl/MessageImpl.java
new file mode 100644
index 0000000..1524af5
--- /dev/null
+++ b/src/main/java/com/zhangmeng/service/impl/MessageImpl.java
@@ -0,0 +1,45 @@
+package com.zhangmeng.service.impl;
+
+import com.zhangmeng.service.Message;
+
+/**
+ * @author zm
+ * @date 2025/2/22 17:31
+ * @version: 1.0
+ */
+public class MessageImpl implements Message {
+
+ private int Id; //消息的ID
+ private int DataLen; //消息的长度
+ private byte[] Data;//消息的内容
+
+ @Override
+ public int GetDataLen() {
+ return this.DataLen;
+ }
+
+ @Override
+ public int GetMsgId() {
+ return this.Id;
+ }
+
+ @Override
+ public byte[] GetData() {
+ return this.Data;
+ }
+
+ @Override
+ public void SetMsgId(int msgId) {
+ this.Id = msgId;
+ }
+
+ @Override
+ public void SetData(byte[] bytes) {
+ this.Data = bytes;
+ }
+
+ @Override
+ public void SetDataLen(int length) {
+ this.DataLen = length;
+ }
+}
diff --git a/src/main/java/com/zhangmeng/utils/ByteBufferUtil.java b/src/main/java/com/zhangmeng/utils/ByteBufferUtil.java
new file mode 100644
index 0000000..c1dc222
--- /dev/null
+++ b/src/main/java/com/zhangmeng/utils/ByteBufferUtil.java
@@ -0,0 +1,185 @@
+package com.zhangmeng.utils;
+
+
+import io.netty.util.internal.StringUtil;
+
+import java.nio.ByteBuffer;
+
+import static io.netty.util.internal.MathUtil.isOutOfBounds;
+import static io.netty.util.internal.StringUtil.NEWLINE;
+
+
+/**
+ * @author zm
+ * @date 2025/2/22 17:44
+ * @version: 1.0
+ */
+public class ByteBufferUtil {
+ private static final char[] BYTE2CHAR = new char[256];
+ private static final char[] HEXDUMP_TABLE = new char[256 * 4];
+ private static final String[] HEXPADDING = new String[16];
+ private static final String[] HEXDUMP_ROWPREFIXES = new String[65536 >>> 4];
+ private static final String[] BYTE2HEX = new String[256];
+ private static final String[] BYTEPADDING = new String[16];
+
+ static {
+ final char[] DIGITS = "0123456789abcdef".toCharArray();
+ for (int i = 0; i < 256; i++) {
+ HEXDUMP_TABLE[i << 1] = DIGITS[i >>> 4 & 0x0F];
+ HEXDUMP_TABLE[(i << 1) + 1] = DIGITS[i & 0x0F];
+ }
+
+ int i;
+
+ // Generate the lookup table for hex dump paddings
+ for (i = 0; i < HEXPADDING.length; i++) {
+ int padding = HEXPADDING.length - i;
+ StringBuilder buf = new StringBuilder(padding * 3);
+ for (int j = 0; j < padding; j++) {
+ buf.append(" ");
+ }
+ HEXPADDING[i] = buf.toString();
+ }
+
+ // Generate the lookup table for the start-offset header in each row (up to 64KiB).
+ for (i = 0; i < HEXDUMP_ROWPREFIXES.length; i++) {
+ StringBuilder buf = new StringBuilder(12);
+ buf.append(NEWLINE);
+ buf.append(Long.toHexString(i << 4 & 0xFFFFFFFFL | 0x100000000L));
+ buf.setCharAt(buf.length() - 9, '|');
+ buf.append('|');
+ HEXDUMP_ROWPREFIXES[i] = buf.toString();
+ }
+
+ // Generate the lookup table for byte-to-hex-dump conversion
+ for (i = 0; i < BYTE2HEX.length; i++) {
+ BYTE2HEX[i] = ' ' + StringUtil.byteToHexStringPadded(i);
+ }
+
+ // Generate the lookup table for byte dump paddings
+ for (i = 0; i < BYTEPADDING.length; i++) {
+ int padding = BYTEPADDING.length - i;
+ StringBuilder buf = new StringBuilder(padding);
+ for (int j = 0; j < padding; j++) {
+ buf.append(' ');
+ }
+ BYTEPADDING[i] = buf.toString();
+ }
+
+ // Generate the lookup table for byte-to-char conversion
+ for (i = 0; i < BYTE2CHAR.length; i++) {
+ if (i <= 0x1f || i >= 0x7f) {
+ BYTE2CHAR[i] = '.';
+ } else {
+ BYTE2CHAR[i] = (char) i;
+ }
+ }
+ }
+
+ /**
+ * 打印所有内容
+ * @param buffer
+ */
+ public static void debugAll(ByteBuffer buffer) {
+ int oldlimit = buffer.limit();
+ buffer.limit(buffer.capacity());
+ StringBuilder origin = new StringBuilder(256);
+ appendPrettyHexDump(origin, buffer, 0, buffer.capacity());
+ System.out.println("+--------+-------------------- all ------------------------+----------------+");
+ System.out.printf("position: [%d], limit: [%d]\n", buffer.position(), oldlimit);
+ System.out.println(origin);
+ buffer.limit(oldlimit);
+ }
+
+ /**
+ * 打印可读取内容
+ * @param buffer
+ */
+ public static void debugRead(ByteBuffer buffer) {
+ StringBuilder builder = new StringBuilder(256);
+ appendPrettyHexDump(builder, buffer, buffer.position(), buffer.limit() - buffer.position());
+ System.out.println("+--------+-------------------- read -----------------------+----------------+");
+ System.out.printf("position: [%d], limit: [%d]\n", buffer.position(), buffer.limit());
+ System.out.println(builder);
+ }
+
+ private static void appendPrettyHexDump(StringBuilder dump, ByteBuffer buf, int offset, int length) {
+ if (isOutOfBounds(offset, length, buf.capacity())) {
+ throw new IndexOutOfBoundsException(
+ "expected: " + "0 <= offset(" + offset + ") <= offset + length(" + length
+ + ") <= " + "buf.capacity(" + buf.capacity() + ')');
+ }
+ if (length == 0) {
+ return;
+ }
+ dump.append(
+ " +-------------------------------------------------+" +
+ NEWLINE + " | 0 1 2 3 4 5 6 7 8 9 a b c d e f |" +
+ NEWLINE + "+--------+-------------------------------------------------+----------------+");
+
+ final int startIndex = offset;
+ final int fullRows = length >>> 4;
+ final int remainder = length & 0xF;
+
+ // Dump the rows which have 16 bytes.
+ for (int row = 0; row < fullRows; row++) {
+ int rowStartIndex = (row << 4) + startIndex;
+
+ // Per-row prefix.
+ appendHexDumpRowPrefix(dump, row, rowStartIndex);
+
+ // Hex dump
+ int rowEndIndex = rowStartIndex + 16;
+ for (int j = rowStartIndex; j < rowEndIndex; j++) {
+ dump.append(BYTE2HEX[getUnsignedByte(buf, j)]);
+ }
+ dump.append(" |");
+
+ // ASCII dump
+ for (int j = rowStartIndex; j < rowEndIndex; j++) {
+ dump.append(BYTE2CHAR[getUnsignedByte(buf, j)]);
+ }
+ dump.append('|');
+ }
+
+ // Dump the last row which has less than 16 bytes.
+ if (remainder != 0) {
+ int rowStartIndex = (fullRows << 4) + startIndex;
+ appendHexDumpRowPrefix(dump, fullRows, rowStartIndex);
+
+ // Hex dump
+ int rowEndIndex = rowStartIndex + remainder;
+ for (int j = rowStartIndex; j < rowEndIndex; j++) {
+ dump.append(BYTE2HEX[getUnsignedByte(buf, j)]);
+ }
+ dump.append(HEXPADDING[remainder]);
+ dump.append(" |");
+
+ // Ascii dump
+ for (int j = rowStartIndex; j < rowEndIndex; j++) {
+ dump.append(BYTE2CHAR[getUnsignedByte(buf, j)]);
+ }
+ dump.append(BYTEPADDING[remainder]);
+ dump.append('|');
+ }
+
+ dump.append(NEWLINE +
+ "+--------+-------------------------------------------------+----------------+");
+ }
+
+ private static void appendHexDumpRowPrefix(StringBuilder dump, int row, int rowStartIndex) {
+ if (row < HEXDUMP_ROWPREFIXES.length) {
+ dump.append(HEXDUMP_ROWPREFIXES[row]);
+ } else {
+ dump.append(NEWLINE);
+ dump.append(Long.toHexString(rowStartIndex & 0xFFFFFFFFL | 0x100000000L));
+ dump.setCharAt(dump.length() - 9, '|');
+ dump.append('|');
+ }
+ }
+
+ public static short getUnsignedByte(ByteBuffer buffer, int index) {
+ return (short) (buffer.get(index) & 0xFF);
+ }
+}
+