snmp4j SnmpGetExample

最新推荐文章于 2025-06-17 12:00:00 发布

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此博客展示了使用Java实现SNMP GET操作的示例代码。通过引入相关的SNMP4J库，设置目标地址、OID等参数，创建PDU对象并发送请求，最后处理代理的响应，包括判断是否有错误及输出结果。

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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.Integer32;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.UdpAddress;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;

public class SnmpGetExample {
private static String tempval;
private static String ipAddress = "127.0.0.1";

private static String port = "161";

// OID of MIB RFC 1213; Scalar Object = .iso.org.dod.internet.mgmt.mib-2.system.sysDescr.0
private static String oidValue = ".1.3.6.1.2.1.1.1.0"; // ends with 0 for scalar object

private static int snmpVersion = SnmpConstants.version1;

private static String community = "public";

public static void main(String[] args) throws Exception {
System.out.println("SNMP GET Demo");

// Create TransportMapping and Listen
TransportMapping transport = new DefaultUdpTransportMapping();
transport.listen();

// Create Target Address object
CommunityTarget comtarget = new CommunityTarget();
comtarget.setCommunity(new OctetString(community));
comtarget.setVersion(snmpVersion);
comtarget.setAddress(new UdpAddress(ipAddress + "/" + port));
comtarget.setRetries(2);
comtarget.setTimeout(1000);

// Create the PDU object
PDU pdu = new PDU();
pdu.add(new VariableBinding(new OID(oidValue)));
pdu.setType(PDU.GET);
pdu.setRequestID(new Integer32(1));

// Create Snmp object for sending data to Agent
Snmp snmp = new Snmp(transport);

System.out.println("Sending Request to Agent...");
ResponseEvent response = snmp.get(pdu, comtarget);

// Process Agent Response
if (response != null) {
System.out.println("Got Response from Agent");
PDU responsePDU = response.getResponse();

if (responsePDU != null) {
int errorStatus = responsePDU.getErrorStatus();
int errorIndex = responsePDU.getErrorIndex();
String errorStatusText = responsePDU.getErrorStatusText();

if (errorStatus == PDU.noError) {
//System.out.println("Snmp Get Response = " + responsePDU.getVariableBindings());
System.out.println("response pdu size is " + responsePDU.size());
for (int i = 0; i < responsePDU.size(); i++) {
VariableBinding vb = responsePDU.get(i);
//System.out.println(vb.getOid() + " = " + vb.getVariable());
tempval = vb.toValueString();
System.out.println(tempval);
}

} else {
System.out.println("Error: Request Failed");
System.out.println("Error Status = " + errorStatus);
System.out.println("Error Index = " + errorIndex);
System.out.println("Error Status Text = " + errorStatusText);
}
} else {
System.out.println("Error: Response PDU is null");
}
} else {
System.out.println("Error: Agent Timeout... ");
}
snmp.close();
}
}