详细分析mysql协议的query包及解析

git

https://github.com/sea-boat/mysql-protocol

概况

mysql客户端可以用query包向服务端发送一个基于文本查询。

mysql通信报文结构

query包

Payload

1 [03] COM_QUERYstring[EOF] the query the server shall execute

更多详情 ： https://dev.mysql.com/doc/internals/en/com-query.html

query包类

/**
 * 
 * <pre><b>mysql query packet.</b></pre>
 * @author 
 * <pre>seaboat</pre>
 * <pre><b>email: </b>849586227@qq.com</pre>
 * <pre><b>blog: </b>http://www.gxlcms.com/;/pre>
 * @version 1.0
 * @see http://www.gxlcms.com/
 */public class QueryPacket extends MySQLPacket {
 public byte flag; 
 public byte[] message; 
 public void read(byte[] data) {
 MySQLMessage mm = new MySQLMessage(data);
 packetLength = mm.readUB3();
 packetId = mm.read();
 flag = mm.read();
 message = mm.readBytes();
 } public void write(ByteBuffer buffer) { 
 int size = calcPacketSize();
 BufferUtil.writeUB3(buffer, size);
 buffer.put(packetId);
 buffer.put(COM_QUERY);
 buffer.put(message);
 } @Override
 public int calcPacketSize() { 
 int size = 1; 
 if (message != null) {
 size += message.length;
 } 
 return size;
 } 
 @Override
 protected String getPacketInfo() { 
 return "MySQL Query Packet";
 }

}