java自定义通讯协议.doc

* 定义自动升级客户端与服务端的通讯协议 package com.rochoc.autoupdate; public class AUPD /* */* * 无意义操作 */ public static final String NONE = NONE ; /* */* * 发送客户端版本信息 */ public static final String SEND_CLIENT_VERSION = SENDCVER; /* */* * 接收客户端版本信息 */ public static final String RECEIVED_CLIENT_VERSION = RECDCVER; /* */* * 发送文件全路径 */ public static final String SEND_FILE_ABSOULT = SENDFILE; /* */* * 接收文件全路径 */ public static final String RECEIVED_FILE_ABSOULT = RECDFILE; /* */* * 开始文件传输 */ public static final String START_TRANSMIT = STARTTSM; /* */* * 结束文件传输 */ public static final String TERMINATE_TRANSMIT = TERMTSMT; /* */* * 更新失败 */ public static final String UPDATED_FAILURE = UPDEFAIL; /* */* * 更新成功 */ public static final String UPDATED_SUCCESSFUL = UPDESUCC; /* */* * 无需更新 */ public static final String NOTNEED_UPDATED = NNEEDUPD; /* */* * 已经准备好接收更新文件 */ public static final String READY_TO_UPDATE = READYTUP; /* */* * 结束链接 */ public static final String BYE = BYEBYEOK; /* */* * 数据区OFFSET */ public static final int DATA_OFFSET = 5; /* */* * 文件数据块大小 */ public static final int DATA_SIZE = 1024; /* */* * 发送缓冲区大小 */ public static final int BUFFER_SIZE = DATA_SIZE + 1 + 4; / 0位是标志位，区分数据和命令 + 4位长度 /* */* * 数据段标识 */ public static final int MARK_DATA_SECT = 0; /* */* * 命令段标识 */ public static final int CMD_DATA_SECT =