update 电单车协议

2026-04-22 20:15:06 +08:00 · 2024-08-15 11:25:47 +08:00
parent 415f7c4b36
commit a6a799f5f0
3 changed files with 8 additions and 17 deletions
--- a/jsowell-netty/src/main/java/com/jsowell/netty/domain/EBikeMessage.java
+++ b/jsowell-netty/src/main/java/com/jsowell/netty/domain/EBikeMessage.java
@@ -0,0 +1,104 @@
+package com.jsowell.netty.domain;
+
+import com.jsowell.common.YouDianUtils;
+import com.jsowell.common.util.BytesUtil;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.lang3.builder.ToStringBuilder;
+import org.apache.commons.lang3.builder.ToStringStyle;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+
+@Slf4j
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+public class EBikeMessage {
+    private String header; // 包头 (3字节)
+    private int length; // 长度 (2字节)
+    private int physicalId; // 物理ID (4字节)
+    private int messageId; // 消息ID (2字节)
+    private String command; // 命令 (1字节)
+    private byte[] data; // 数据 (n字节)
+    private int checksum; // 校验 (2字节)
+
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this, ToStringStyle.JSON_STYLE)
+                .append("header", header)
+                .append("length", length)
+                .append("physicalId", physicalId)
+                .append("messageId", messageId)
+                .append("command", command)
+                .append("data", data)
+                .append("checksum", checksum)
+                .toString();
+    }
+
+    public static EBikeMessage parseMessage(byte[] messageBytes) {
+        if (messageBytes == null || messageBytes.length < 14 || messageBytes.length > 256) {
+            throw new IllegalArgumentException("Invalid message bytes");
+        }
+
+        EBikeMessage message = new EBikeMessage();
+
+        try {
+            // 读取包头
+            byte[] headerBytes = Arrays.copyOfRange(messageBytes, 0, 3);
+            String header = new String(headerBytes, StandardCharsets.UTF_8);
+            message.setHeader(header);
+
+            // 读取长度
+            byte[] lengthBytes = Arrays.copyOfRange(messageBytes, 3, 5);
+            int length = BytesUtil.bytesToIntLittle(lengthBytes);
+            message.setLength(length);
+
+            // 验证长度
+            if (length != (messageBytes.length - 5)) {
+                throw new IllegalArgumentException("Invalid message length");
+            }
+
+            // 读取物理ID
+            byte[] physicalIdBytes = Arrays.copyOfRange(messageBytes, 5, 9);
+            int physicalId = BytesUtil.bytesToIntLittle(physicalIdBytes);
+            message.setPhysicalId(physicalId);
+
+            // 读取消息ID
+            byte[] messageIdBytes = Arrays.copyOfRange(messageBytes, 9, 11);
+            int messageId = BytesUtil.bytesToIntLittle(messageIdBytes);
+            message.setMessageId(messageId);
+
+            // 读取命令
+            byte commandByte = messageBytes[11];
+            String command = BytesUtil.bcd2StrLittle(new byte[]{commandByte});
+            message.setCommand(command);
+
+            // 读取数据
+            byte[] dataBytes = Arrays.copyOfRange(messageBytes, 12, messageBytes.length - 2);
+            message.setData(dataBytes);
+            String data = BytesUtil.bcd2StrLittle(dataBytes);
+
+            // 读取校验
+            byte[] checksumBytes = Arrays.copyOfRange(messageBytes, messageBytes.length - 2, messageBytes.length);
+            int checksum = BytesUtil.bytesToIntLittle(checksumBytes);
+            message.setChecksum(checksum);
+
+            // 校验码验证
+            if (!YouDianUtils.validateChecksum(messageBytes)) {
+                throw new IllegalArgumentException("Checksum validation failed");
+            }
+
+            log.info("报文:{}, parseMessage:{}", BytesUtil.binary(messageBytes, 16), message.toString());
+            return message;
+        } catch (Exception e) {
+            log.error("Error parsing message", e);
+            throw e;
+        }
+    }
+
+}