java将读取到的西门子PLC中标签的二进制数组，根据标签数据类型，偏移长度解析其真实的值。

/**
 * 从字节数组解析值
 * @param data 字节数组
 * @param dataType 数据类型
 * @param bitOffset 位偏移
 */
public Object parseValue(byte[] data, String dataType, int bitOffset) {
    if (data == null || data.length == 0) return null;

    switch (dataType.toUpperCase()) {
        case "BOOL":
            // 从指定字节的指定位提取布尔值
            int byteIndex = bitOffset / 8;
            int bitIndex = bitOffset % 8;
            if (byteIndex < data.length) {
                return (data[byteIndex] & (1 << bitIndex)) != 0;
            }
            return null;
        case "BYTE":
            return data[0] & 0xFF;
        case "INT":
            // 西门子PLC使用大端序
            return (short) ((data[0] << 8) | (data[1] & 0xFF));
        case "WORD":
            return ((data[0] & 0xFF) << 8) | (data[1] & 0xFF);
        case "DINT":
            return (data[0] << 24) | ((data[1] & 0xFF) << 16) |
                    ((data[2] & 0xFF) << 8) | (data[3] & 0xFF);
        case "DWORD":
            return ((long) (data[0] & 0xFF) << 24) | ((data[1] & 0xFF) << 16) |
                    ((data[2] & 0xFF) << 8) | (data[3] & 0xFF);
        case "REAL":
        case "FLOAT":
            int intBits = (data[0] << 24) | ((data[1] & 0xFF) << 16) |
                    ((data[2] & 0xFF) << 8) | (data[3] & 0xFF);
            return Float.intBitsToFloat(intBits);
        case "LREAL":
        case "DOUBLE":
            long longBits = ((long) data[0] << 56) | ((long) (data[1] & 0xFF) << 48) |
                    ((long) (data[2] & 0xFF) << 40) | ((long) (data[3] & 0xFF) << 32) |
                    ((long) (data[4] & 0xFF) << 24) | ((data[5] & 0xFF) << 16) |
                    ((data[6] & 0xFF) << 8) | (data[7] & 0xFF);
            return Double.longBitsToDouble(longBits);
        default:
            // 默认作为字节数组返回
            return bytesToHex(data);
    }
}
/**
 * 字节数组转16进制字符串
 */
private String bytesToHex(byte[] bytes) {
    StringBuilder sb = new StringBuilder();
    for (byte b : bytes) {
        sb.append(String.format("%02X", b));
    }
    return sb.toString();
}