java使用snmp walk和get代码示例

Java语言可以通过SNMP协议来实现网络设备的监控和管理，其中使用snmp walk和get是常见的操作。以下是Java实现SNMP Walk和Get的示例代码：

SNMP Walk示例代码：

import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.UdpAddress;
import org.snmp4j.transport.DefaultUdpTransportMapping;

public class SnmpWalkExample {
    public static void main(String[] args) {
        String ipAddress = "192.168.0.1"; // 设备IP地址
        String port = "161"; // SNMP端口号，默认为161
        String community = "public"; // SNMP共同体名称
        int timeout = 1500; // 超时时间，单位为毫秒
        int retries = 2; // 重试次数

        try {
            TransportMapping transport = new DefaultUdpTransportMapping();
            Snmp snmp = new Snmp(transport);
            transport.listen();

            CommunityTarget target = new CommunityTarget();
            target.setCommunity(new OctetString(community));
            target.setAddress(GenericAddress.parse("udp:" + ipAddress + "/" + port));
            target.setRetries(retries);
            target.setTimeout(timeout);
            target.setVersion(SnmpConstants.version2c);

            PDU pdu = new PDU();
            pdu.add(new VariableBinding(new OID("1.3.6.1"))); // 这里以1.3.6.1为例，可以根据需求修改
            pdu.setType(PDU.GETNEXT);

            boolean finished = false;
            while (!finished) {
                ResponseEvent respEvent = snmp.send(pdu, target);
                PDU response = respEvent.getResponse();

                if (response == null) {
                    System.out.println("Walk结束！");
                    finished = true;
                    break;
                }

                for (int i=0; i<response.size(); i++) {
                    System.out.println(response.get(i).toString());
                    OID nextOID = response.get(i).getOid();
                    if (nextOID == null || !nextOID.startsWith(new OID("1.3.6.1"))) {
                        finished = true;
                        break;
                    }
                    pdu.setRequestID(new Integer32(0));
                    pdu.set(0, new VariableBinding(nextOID));
                }
            }
            snmp.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

SNMP Get示例代码：

import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.UdpAddress;
import org.snmp4j.transport.DefaultUdpTransportMapping;

public class SnmpGetExample {
    public static void main(String[] args) {
        String ipAddress = "192.168.0.1"; // 设备IP地址
        String port = "161"; // SNMP端口号，默认为161
        String community = "public"; // SNMP共同体名称
        int timeout = 1500; // 超时时间，单位为毫秒
        int retries = 2; // 重试次数

        try {
            TransportMapping transport = new DefaultUdpTransportMapping();
            Snmp snmp = new Snmp(transport);
            transport.listen();

            CommunityTarget target = new CommunityTarget();
            target.setCommunity(new OctetString(community));
            target.setAddress(GenericAddress.parse("udp:" + ipAddress + "/" + port));
            target.setRetries(retries);
            target.setTimeout(timeout);
            target.setVersion(SnmpConstants.version2c);

            PDU pdu = new PDU();
            pdu.add(new VariableBinding(new OID("1.3.6.1"))); // 这里以1.3.6.1为例，可以根据需求修改
            pdu.setType(PDU.GET);

            ResponseEvent respEvent = snmp.send(pdu, target);
            PDU response = respEvent.getResponse();

            if (response == null) {
                System.out.println("Get操作失败！");
                return;
            }

            for (int i=0; i<response.size(); i++) {
                System.out.println(response.get(i).toString());
            }

            snmp.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}