使用snmp4j获取网络打印机的所有oid

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.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;

public class SNMPExample {
    public static void main(String[] args) {
        String ipAddress = "打印机的IP地址";
        String community = "SNMP团体名";

        try {
            // 创建传输映射
            TransportMapping transport = new DefaultUdpTransportMapping();
            transport.listen();

            // 创建SNMP对象
            Snmp snmp = new Snmp(transport);

            // 创建目标地址对象
            Address targetAddress = GenericAddress.parse("udp:" + ipAddress + "/161");
            CommunityTarget target = new CommunityTarget();
            target.setCommunity(new OctetString(community));
            target.setAddress(targetAddress);
            target.setRetries(2);
            target.setTimeout(5000);
            target.setVersion(SnmpConstants.version2c);

            // 创建PDU对象
            PDU pdu = new PDU();
            pdu.setType(PDU.GETNEXT);
            pdu.add(new VariableBinding(new OID("1.3.6.1.2.1")));

            // 发送请求
            ResponseEvent response = snmp.send(pdu, target);

            // 处理响应
            if (response != null && response.getResponse() != null) {
                PDU responsePDU = response.getResponse();
                if (responsePDU.getErrorStatus() == PDU.noError) {
                    for (int i = 0; i < responsePDU.size(); i++) {
                        VariableBinding vb = responsePDU.get(i);
                        System.out.println(vb.getOid() + " = " + vb.getVariable());
                    }
                } else {
                    System.out.println("Error: " + responsePDU.getErrorStatusText());
                }
            } else {
                System.out.println("Error: Timeout occurred.");
            }

            // 关闭SNMP对象
            snmp.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}