SNMP4J 中文乱码问题解决

因为项目原因，用到了snmp trap，使用UDP 162端口来接收SNMP报警信息。
在显示中文和日期时会出现乱码，具体原因网上写的比较多，我就不做解释了。
从网上找了一部分代码，总有点问题，然后修修改改中文能显示了，但是遇到日期仍然有问题，然后又找了一部分代码，将其整合，终于解决了，先粘一下代码，后面如果改动了再作更新。

// 处理SNMP事件

    public void processPdu(CommandResponderEvent event) {
		System.out.println("processPdu");

		String version = null;
		String community = null;
		if (event.getPDU().getType() == PDU.V1TRAP) {
			version = "v1";
			community = new String(event.getSecurityName());
		} else if (event.getPDU().getType() == PDU.TRAP) {
			if (event.getSecurityModel() == 2) {
				version = "v2";
				community = new String(event.getSecurityName());
			} else {
				version = "v3";
			}
		}

		PDU pdu = event.getPDU();

		String output = "SNMP：[IP = " + event.getPeerAddress() + "]";
		// System.out.println(output);

		if (event != null && event.getPDU() != null) {
			Vector<VariableBinding> recVBs = (Vector<VariableBinding>) pdu.getVariableBindings();
			for (int i = 0; i < recVBs.size(); i++) {
				VariableBinding recVB = recVBs.elementAt(i);

				String des = OID.get(recVB.getOid().toString()) + " : " + getChinese(recVB.getVariable().toString());
				// System.out.println(des);
				output += "\n" + des;

				// }
			}
		}

		System.out.println(output);


	}

// octetString 转 二进制

private static int[] octetStringToBytes(String value_ipar) {
	// ---------------------------
	// Split string into its parts
	// ---------------------------
	String[] bytes;
	bytes = value_ipar.split("[^0-9A-Fa-f]");

	// -----------------
	// Initialize result
	// -----------------
	int[] result;
	result = new int[bytes.length];

	// -------------
	// Convert bytes
	// -------------
	int counter;
	for (counter = 0; counter < bytes.length; counter++)
		result[counter] = Integer.parseInt(bytes[counter], 16);

	// ----
	// Done
	// ----
	return (result);

}

// octetString 转 Date

private static Date octetStringToDate(String value_ipar) throws Exception {
	// ---------------------------
	// Convert into array of bytes
	// ---------------------------
	int[] bytes;
	bytes = octetStringToBytes(value_ipar);

	// -----------------------
	// Maybe nothing specified
	// -----------------------
	if (bytes[0] == 0)
		return (null);

	// ------------------
	// Extract parameters
	// ------------------
	int year;
	int month;
	int day;
	int hour;
	int minute;
	int second;
	int deci_sec = 0;
	int offset = 0;
	year = (bytes[0] * 256) + bytes[1];
	month = bytes[2];
	day = bytes[3];
	hour = bytes[4];
	minute = bytes[5];
	second = bytes[6];
	if (bytes.length >= 8)
		deci_sec = bytes[7];
	if (bytes.length >= 10) {
		offset = bytes[9] * 60;
		if (bytes.length >= 11)
			offset += bytes[10];
		if (bytes[8] == '-')
			offset = -offset;
		offset *= 60 * 1000;
	}

	// ------------------------------------
	// Get current DST and time zone offset
	// ------------------------------------
	Calendar calendar;
	int my_dst;
	int my_zone;
	calendar = Calendar.getInstance();
	my_dst = calendar.get(Calendar.DST_OFFSET);
	my_zone = calendar.get(Calendar.ZONE_OFFSET);

	// ----------------------------------
	// Compose result
	// Month to be converted into 0-based
	// ----------------------------------
	calendar.clear();
	calendar.set(Calendar.YEAR, year);
	calendar.set(Calendar.MONTH, month - 1);
	calendar.set(Calendar.DAY_OF_MONTH, day);
	calendar.set(Calendar.HOUR_OF_DAY, hour);
	calendar.set(Calendar.MINUTE, minute);
	calendar.set(Calendar.SECOND, second);
	calendar.set(Calendar.MILLISECOND, deci_sec * 100);

	// ---------
	// Reset DST
	// ---------
	calendar.add(Calendar.MILLISECOND, my_dst);

	// -----------------------------------------------------------------------------------
	// If the offset is set, we have to convert the time using the offset of
	// our time zone
	// -----------------------------------------------------------------------------------
	if (offset != 0) {
		int delta;
		delta = my_zone - offset;
		calendar.add(Calendar.MILLISECOND, delta);
	}

	// -------------
	// Return result
	// -------------
	return (calendar.getTime());

}

// octetString 转 中文

private static String getChinese(String variable) {
	String result = variable;

	if (!variable.contains(":")) {
		return result;
	}

	if (variable.length() == 23 || variable.length() == 32) {
		try {
			return format.format(octetStringToDate(variable));
		} catch (Exception e) {
		}
	}

	if (result.equals(variable)) {
		try {

			String[] temps = variable.split(":");
			byte[] bs = new byte[temps.length];
			for (int i = 0; i < temps.length; i++)
				bs[i] = (byte) Integer.parseInt(temps[i], 16);
			result = new String(bs, "utf-8");
		} catch (Exception ex) {

		}
	}
	return result;

}

参考网址：
http://www.cnblogs.com/yuanfy008/p/8046189.html
https://blog.csdn.net/appletreesujie/article/details/50752065
https://forum.huawei.com/enterprise/zh/thread-429027.html
http://www.mibdepot.com/cgi-bin/getmib3.cgi?win=mib_a&i=1&n=MSEA-MIB&r=johnsoncontrols&f=msea.mi2&v=v2&t=tree