java网络编程，UDP，发送16进制报文。

package com.energyfuture.utils; import com.energyfuture.protocol.ReqUpImageCodec_85H; import com.energyfuture.protocol.ReqUpImageCodec_86H; import org.apache.commons.lang.StringUtils; import sun.misc.BASE64Decoder; import java.sql.Timestamp; import java.util.*; public class AssemblyCommand { public static String getCommand00H() { return UpdParam.Command00H; } /** * 根据设备编码，组装终端号码 * * @param deviceCode 设备编码 * @return String */ public static String getCommand(String deviceCode) { String idEnd = ""; String idStart = ""; if (!StringUtils.isEmpty(deviceCode) && !"null".equals(deviceCode)) { idEnd = deviceCode.substring(deviceCode.length() - 4, deviceCode.length()); idStart = deviceCode.substring(0, 2); } String id = idStart + idEnd; System.out.println("终端号码：" + id); System.out.println("16进制终端号码：" + HexConvert.convertStringToHex(id)); return HexConvert.convertStringToHex(id); } /** * 根据拍照时间 通道号 预置位号 包数高位 包数低位 ，组装84数据域。 * * @param dServerTime 服务器日期 * @param channelNo 通道号 * @param presetPosition 预置位号 * @param imageStr 图片信息（Base64字符串） * @return String */ public static String getCommand_84_DataDomain(String dServerTime, String channelNo, String presetPosition, String imageStr) { String dataDomain = ""; //构建日期 if (!StringUtils.isEmpty(dServerTime) && !"null".equals(dServerTime)) { Date time = Timestamp.valueOf(dServerTime); dataDomain = HexConvert.getCommandDate(time); } else { Date time = new Date(); dataDomain = HexConvert.getCommandDate(time); } //构建 通道号 int channelID = UpdParam.COMMAND_84_CHANNELNUMBER; if (!StringUtils.isEmpty(channelNo) && !"null".equals(channelNo)) { channelID = Integer.parseInt(channelNo); } System.out.println("通道号：" + channelID); dataDomain += HexConvert.getCommandDate(channelID); //构建预置位号 int presetPositionID = UpdParam.COMMAND_84_PRESETPOSITIONNUMBER; if (!StringUtils.isEmpty(presetPosition) && !"null".equals(presetPosition)) { presetPositionID = Integer.parseInt(presetPosition); } System.out.println("预置位号：" + channelID); dataDomain += HexConvert.getCommandDate(presetPositionID); //构建包数 if (!StringUtils.isEmpty(imageStr) && !"null".equals(imageStr)) { BASE64Decoder decoder = new BASE64Decoder(); try { byte[] byteAll = decoder.decodeBuffer(imageStr); Object[] obj = HexConvert.splitAry(byteAll, UpdParam.BYTESUMMAX); //包数高位 包数低位 不够4位，前面补0 String packetNumber = HexConvert.demical2Hex(obj.length); int lengthStr = 4 - packetNumber.length(); String zeroStr = ""; for (int k = 0; k < lengthStr; k++) { zeroStr += "0"; } zeroStr += packetNumber; dataDomain += zeroStr; System.out.println("拆包每包字节数：" + UpdParam.BYTESUMMAX); System.out.println("拆包总包数：" + obj.length); } catch (Exception e) { System.err.println(e); } } else { //如果图片里面没有值，高低位给0000 dataDomain += "0000"; } System.out.println("16进制数据域：" + dataDomain); return dataDomain; } /** * 根据 通道号 预置位号 包数高位 包数低位 ,整个图片数据，组装85数据域。 * * @param channelID 通道号 * @param presetPosition 预置位号 * @param imageStr 图片信息（Base64字符串） * @return List<Map<String, Object>> * 图片拆包的数据（单个包的图片资源16进制imageNumber， * 数据域16进制dataField， * 数据长度commandDataSizeStr， * 图片字节数长度commandImageStrLength） 都是跟包号commandSubpackage相互对应 */ public static List<Map<String, Object>> getCommand_85_DataDomain(int channelID, int presetPosition, String imageStr) { List<Map<String, Object>> lists = new ArrayList<Map<String, Object>>(); String dataDomain = ""; //构建通道号 System.out.println("通道号：" + channelID); dataDomain += HexConvert.getCommandDate(channelID); //构建预置位号 System.out.println("预置位号：" + presetPosition); dataDomain += HexConvert.getCommandDate(presetPosition); //构建包号高 if (!StringUtils.isEmpty(imageStr) && !"null".equals(imageStr)) { BASE64Decoder decoder = new BASE64Decoder(); try { byte[] byteAll = decoder.decodeBuffer(imageStr); Object[] subAryList = HexConvert.splitAry(byteAll, UpdParam.BYTESUMMAX); System.out.println("分解子包个数：" + subAryList.length); for (int i = 0; i < subAryList.length; i++) { String dataDomainItem = ""; Map item = new HashMap<Object, Object>(); //图像数据 和对应的包号 int packageID = i + 1; //分解图片数据 String imStr = HexConvert.BinaryToHexString((byte[])subAryList[i]); item.put("imageNumber", imStr); //子包包号高位 子包包号低位 String commandSubpackageStr = HexConvert.demical2Hex(packageID); int lengthStrss = 4 - commandSubpackageStr.length(); String commandSubpackage = ""; for (int k = 0; k < lengthStrss; k++) { commandSubpackage += "0"; } commandSubpackage += commandSubpackageStr; item.put("commandSubpackage", commandSubpackage); System.out.println(packageID + "" + "子包包号高位 子包包号低位:" + commandSubpackage); dataDomainItem += commandSubpackage; //图像数据字节总数 String commandImageStrLength = HexConvert.getCommandDate(((byte[])subAryList[i]).length); int lengthStr = 4 - commandImageStrLength.length(); String zeroStr = ""; for (int k = 0; k < lengthStr; k++) { zeroStr += "0"; } zeroStr += commandImageStrLength; System.out.println((byte[])subAryList[i] + "图像数据字节数:" + zeroStr); item.put("commandImageStrLength", zeroStr); //数据域16进制编码 String dataField = dataDomain + dataDomainItem+imStr; item.put("dataField", dataField); System.out.println("数据域16进制编码:" + dataField); //数据长度 int commandDataSize = 4 + ((byte[])subAryList[i]).length; String commandDataSizeStr = HexConvert.getCommandDate(commandDataSize); int commandDataSizeStrlengthStr = 4 - commandDataSizeStr.length(); String zeroStrs = ""; for (int k = 0; k < commandDataSizeStr