git
https://github.com/sea-boat/mysql-protocol
概况
ColumnCount包属于服务端返回ResultSet时的其中一部分包。
mysql通信报文结构
| 类型 | 名字 | 描述 |
|---|---|---|
| int | payload长度 | 按照the least significant byte first存储，3个字节的payload和1个字节的序列号组合成报文头 |
| int | 序列号 | |
| string | payload | 报文体，长度即为前面指定的payload长度 |
ColumnCount包
Payload
Protocol::LengthEncodedInteger
更多详情 ： http://dev.mysql.com/doc/internals/en/com-query-response.html#packet-ProtocolText::ResultsetRow
ColumnCount包类
/** * *column count packet.* @author *seaboat*email: 849586227@qq.com*blog: http://www.php.cn/;/pre> * @version 1.0 * @see http://www.php.cn/ */public class ColumnCountPacket extends MySQLPacket { public int columnCount; public void read(byte[] data) { MySQLMessage mm = new MySQLMessage(data); this.packetLength = mm.readUB3(); this.packetId = mm.read(); this.columnCount = (int) mm.readLength(); } @Override public void write(ByteBuffer buffer) { int size = calcPacketSize(); BufferUtil.writeUB3(buffer, size); buffer.put(packetId); BufferUtil.writeLength(buffer, columnCount); } @Override public int calcPacketSize() { int size = BufferUtil.getLength(columnCount); return size; } @Override protected String getPacketInfo() { return "MySQL Column Count Packet"; } }以上就是详细介绍mysql 协议的ColumnCount包及解析的内容，更多相关内容请关注PHP中文网（www.php.cn）！
