snmp4j获取mib信息的实例（测试成功）

使用java采用SNMP协议来获取设备上的MIB信息，测试例子采用的是本机作为测试，并且系统是win7而且启用了SNMP协议。

在win7上开启SNMP协议的教程如链接所示：

http://blog.chinaunix.net/uid-24058189-id-2105677.html

在java中来操作snmp协议的jar包下载地址：

http://www.snmp4j.org

工程结构（红框为最重要的两个文件）：

本例子源码（采用maven框架，不影响例子）：

package mySNMP;

import java.io.IOException;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import org.snmp4j.CommunityTarget;
import org.snmp4j.PDU;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.event.ResponseEvent;
import org.snmp4j.event.ResponseListener;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.GenericAddress;
import org.snmp4j.smi.Integer32;
import org.snmp4j.smi.Null;
import org.snmp4j.smi.OID;
import org.snmp4j.smi.OctetString;
import org.snmp4j.smi.VariableBinding;
import org.snmp4j.transport.DefaultUdpTransportMapping;

/**
 * 演示： GET单个OID值
 *
 * blog http://www.micmiu.com
 *
 * @author Michael
 */
public class SnmpData {

	public static final int DEFAULT_VERSION = SnmpConstants.version2c;
	public static final String DEFAULT_PROTOCOL = "udp";
	public static final int DEFAULT_PORT = 161;
	public static final long DEFAULT_TIMEOUT = 3 * 1000L;
	public static final int DEFAULT_RETRY = 3;

	/**
	 * 创建对象communityTarget
	 *
	 * @param targetAddress
	 * @param community
	 * @param version
	 * @param timeOut
	 * @param retry
	 * @return CommunityTarget
	 */
	public static CommunityTarget createDefault(String ip, String community) {
		Address address = GenericAddress.parse(DEFAULT_PROTOCOL + ":" + ip
				+ "/" + DEFAULT_PORT);
		CommunityTarget target = new CommunityTarget();
		target.setCommunity(new OctetString(community));
		target.setAddress(address);
		target.setVersion(DEFAULT_VERSION);
		target.setTimeout(DEFAULT_TIMEOUT); // milliseconds
		target.setRetries(DEFAULT_RETRY);
		return target;
	}
	/*获取信息*/
	public static void snmpGet(String ip, String community, String oid) {

		CommunityTarget target = createDefault(ip, community);
		Snmp snmp = null;
		try {
			PDU pdu = new PDU();
			// pdu.add(new VariableBinding(new OID(new int[]
			// {1,3,6,1,2,1,1,2})));
			pdu.add(new VariableBinding(new OID(oid)));

			DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();
			snmp = new Snmp(transport);
			snmp.listen();
			System.out.println("-------> 发送PDU <-------");
			pdu.setType(PDU.GET);
			ResponseEvent respEvent = snmp.send(pdu, target);
			System.out.println("PeerAddress:" + respEvent.getPeerAddress());
			PDU response = respEvent.getResponse();

			if (response == null) {
				System.out.println("response is null, request time out");
			} else {

				// Vector vbVect =
				// response.getVariableBindings();
				// System.out.println("vb size:" + vbVect.size());
				// if (vbVect.size() == 0) {
				// System.out.println("response vb size is 0 ");
				// } else {
				// VariableBinding vb = vbVect.firstElement();
				// System.out.println(vb.getOid() + " = " + vb.getVariable());
				// }

				System.out.println("response pdu size is " + response.size());
				for (int i = 0; i < response.size(); i++) {
					VariableBinding vb = response.get(i);
					System.out.println(vb.getOid() + " = " + vb.getVariable());
				}

			}
			System.out.println("SNMP GET one OID value finished !");
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("SNMP Get Exception:" + e);
		} finally {
			if (snmp != null) {
				try {
					snmp.close();
				} catch (IOException ex1) {
					snmp = null;
				}
			}

		}
	}
	/*获取列表信息，一次获取多条信息*/
	public static void snmpGetList(String ip, String community, List oidList)
	{
		CommunityTarget target = createDefault(ip, community);
		Snmp snmp = null;
		try {
			PDU pdu = new PDU();

			for(String oid:oidList)
			{
				pdu.add(new VariableBinding(new OID(oid)));
			}
			
			DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();
			snmp = new Snmp(transport);
			snmp.listen();
			System.out.println("-------> 发送PDU <-------");
			pdu.setType(PDU.GET);
			ResponseEvent respEvent = snmp.send(pdu, target);
			System.out.println("PeerAddress:" + respEvent.getPeerAddress());
			PDU response = respEvent.getResponse();

			if (response == null) {
				System.out.println("response is null, request time out");
			} else {

				System.out.println("response pdu size is " + response.size());
				for (int i = 0; i < response.size(); i++) {
					VariableBinding vb = response.get(i);
					System.out.println(vb.getOid() + " = " + vb.getVariable());
				}

			}
			System.out.println("SNMP GET one OID value finished !");
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("SNMP Get Exception:" + e);
		} finally {
			if (snmp != null) {
				try {
					snmp.close();
				} catch (IOException ex1) {
					snmp = null;
				}
			}

		}
	}
	/*异步获取信息列表*/
	public static void snmpAsynGetList(String ip, String community,List oidList)
	{
		CommunityTarget target = createDefault(ip, community);
		Snmp snmp = null;
		try {
			PDU pdu = new PDU();

			for(String oid:oidList)
			{
				pdu.add(new VariableBinding(new OID(oid)));
			}
			
			DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();
			snmp = new Snmp(transport);
			snmp.listen();
			System.out.println("-------> 发送PDU <-------");
			pdu.setType(PDU.GET);
			ResponseEvent respEvent = snmp.send(pdu, target);
			System.out.println("PeerAddress:" + respEvent.getPeerAddress());
			PDU response = respEvent.getResponse();

			/*异步获取*/
			final CountDownLatch latch = new CountDownLatch(1);
			ResponseListener listener = new ResponseListener() {
				public void onResponse(ResponseEvent event) {
					((Snmp) event.getSource()).cancel(event.getRequest(), this);
					PDU response = event.getResponse();
					PDU request = event.getRequest();
					System.out.println("[request]:" + request);
					if (response == null) {
						System.out.println("[ERROR]: response is null");
					} else if (response.getErrorStatus() != 0) {
						System.out.println("[ERROR]: response status"
								+ response.getErrorStatus() + " Text:"
								+ response.getErrorStatusText());
					} else {
						System.out.println("Received response Success!");
						for (int i = 0; i < response.size(); i++) {
							VariableBinding vb = response.get(i);
							System.out.println(vb.getOid() + " = "
									+ vb.getVariable());
						}
						System.out.println("SNMP Asyn GetList OID finished. ");
						latch.countDown();
					}
				}
			};

			pdu.setType(PDU.GET);
			snmp.send(pdu, target, null, listener);
			System.out.println("asyn send pdu wait for response...");

			boolean wait = latch.await(30, TimeUnit.SECONDS);
			System.out.println("latch.await =:" + wait);

			snmp.close();
			
			System.out.println("SNMP GET one OID value finished !");
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("SNMP Get Exception:" + e);
		} finally {
			if (snmp != null) {
				try {
					snmp.close();
				} catch (IOException ex1) {
					snmp = null;
				}
			}

		}
	}
	/*获取表格*/
	public static void snmpWalk(String ip, String community, String targetOid)
	{
		CommunityTarget target = createDefault(ip, community);
		TransportMapping transport = null;
		Snmp snmp = null;
		try {
			transport = new DefaultUdpTransportMapping();
			snmp = new Snmp(transport);
			transport.listen();

			PDU pdu = new PDU();
			OID targetOID = new OID(targetOid);
			pdu.add(new VariableBinding(targetOID));

			boolean finished = false;
			System.out.println("----> demo start <----");
			while (!finished) {
				VariableBinding vb = null;
				ResponseEvent respEvent = snmp.getNext(pdu, target);

				PDU response = respEvent.getResponse();

				if (null == response) {
					System.out.println("responsePDU == null");
					finished = true;
					break;
				} else {
					vb = response.get(0);
				}
				// check finish
				finished = checkWalkFinished(targetOID, pdu, vb);
				if (!finished) {
					System.out.println("==== walk each vlaue :");
					System.out.println(vb.getOid() + " = " + vb.getVariable());

					// Set up the variable binding for the next entry.
					pdu.setRequestID(new Integer32(0));
					pdu.set(0, vb);
				} else {
					System.out.println("SNMP walk OID has finished.");
					snmp.close();
				}
			}
			System.out.println("----> demo end <----");
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("SNMP walk Exception: " + e);
		} finally {
			if (snmp != null) {
				try {
					snmp.close();
				} catch (IOException ex1) {
					snmp = null;
				}
			}
		}
	}
	
	private static boolean checkWalkFinished(OID targetOID, PDU pdu,
			VariableBinding vb) {
		boolean finished = false;
		if (pdu.getErrorStatus() != 0) {
			System.out.println("[true] responsePDU.getErrorStatus() != 0 ");
			System.out.println(pdu.getErrorStatusText());
			finished = true;
		} else if (vb.getOid() == null) {
			System.out.println("[true] vb.getOid() == null");
			finished = true;
		} else if (vb.getOid().size() < targetOID.size()) {
			System.out.println("[true] vb.getOid().size() < targetOID.size()");
			finished = true;
		} else if (targetOID.leftMostCompare(targetOID.size(), vb.getOid()) != 0) {
			System.out.println("[true] targetOID.leftMostCompare() != 0");
			finished = true;
		} else if (Null.isExceptionSyntax(vb.getVariable().getSyntax())) {
			System.out
					.println("[true] Null.isExceptionSyntax(vb.getVariable().getSyntax())");
			finished = true;
		} else if (vb.getOid().compareTo(targetOID) <= 0) {
			System.out.println("[true] Variable received is not "
					+ "lexicographic successor of requested " + "one:");
			System.out.println(vb.toString() + " <= " + targetOID);
			finished = true;
		}
		return finished;

	}
	/*异步获取表格*/
	public static void snmpAsynWalk(String ip, String community, String oid)
	{
		final CommunityTarget target = createDefault(ip, community);
		Snmp snmp = null;
		try {
			System.out.println("----> demo start <----");

			DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();
			snmp = new Snmp(transport);
			snmp.listen();

			final PDU pdu = new PDU();
			final OID targetOID = new OID(oid);
			final CountDownLatch latch = new CountDownLatch(1);
			pdu.add(new VariableBinding(targetOID));

			ResponseListener listener = new ResponseListener() {
				public void onResponse(ResponseEvent event) {
					((Snmp) event.getSource()).cancel(event.getRequest(), this);

					try {
						PDU response = event.getResponse();
						// PDU request = event.getRequest();
						// System.out.println("[request]:" + request);
						if (response == null) {
							System.out.println("[ERROR]: response is null");
						} else if (response.getErrorStatus() != 0) {
							System.out.println("[ERROR]: response status"
									+ response.getErrorStatus() + " Text:"
									+ response.getErrorStatusText());
						} else {
							System.out
									.println("Received Walk response value :");
							VariableBinding vb = response.get(0);

							boolean finished = checkWalkFinished(targetOID,
									pdu, vb);
							if (!finished) {
								System.out.println(vb.getOid() + " = "
										+ vb.getVariable());
								pdu.setRequestID(new Integer32(0));
								pdu.set(0, vb);
								((Snmp) event.getSource()).getNext(pdu, target,
										null, this);
							} else {
								System.out
										.println("SNMP Asyn walk OID value success !");
								latch.countDown();
							}
						}
					} catch (Exception e) {
						e.printStackTrace();
						latch.countDown();
					}

				}
			};

			snmp.getNext(pdu, target, null, listener);
			System.out.println("pdu 已发送,等到异步处理结果...");

			boolean wait = latch.await(30, TimeUnit.SECONDS);
			System.out.println("latch.await =:" + wait);
			snmp.close();

			System.out.println("----> demo end <----");
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("SNMP Asyn Walk Exception:" + e);
		}
	}
	/*设置信息*/
	public static void setPDU(String ip,String community,String oid) throws IOException
	{
		CommunityTarget target = createDefault(ip, community);
		Snmp snmp = null;
		PDU pdu = new PDU();
		pdu.add(new VariableBinding(new OID(oid),new OctetString("shangrao")));
		pdu.setType(PDU.SET);
		
		DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();
		snmp = new Snmp(transport);
		snmp.listen();
		System.out.println("-------> 发送PDU <-------");
		snmp.send(pdu, target);
		snmp.close();
	}
}

测试例子

/**
 * 
 */
package mySNMP;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.junit.Test;

/**
 * @filename SnmpGet.java
 * @author code by jianghuiwen
 * @mail [email protected]
 *
 * 下午2:21:53
 */
public class TestSnmpGet {
	
	@Test
	public void testGet()
	{
		String ip = "127.0.0.1";
		String community = "public";
		String oidval = "1.3.6.1.2.1.1.6.0";
		SnmpData.snmpGet(ip, community, oidval);
	}

	public void testGetList()
	{
		String ip = "127.0.0.1";
		String community = "public";
		List oidList=new ArrayList();
		oidList.add("1.3.6.1.2.1.1.5.0");
		oidList.add("1.3.6.1.2.1.1.7.0");
		SnmpData.snmpGetList(ip, community, oidList);
	}
	

	public void testGetAsyList()
	{
		String ip = "127.0.0.1";
		String community = "public";
		List oidList=new ArrayList();
		oidList.add("1.3.6.1.2.1.1.5.0");
		oidList.add("1.3.6.1.2.1.1.7.0");
		SnmpData.snmpAsynGetList(ip, community, oidList);
		
		System.out.println("i am first!");
	}
	

	public void testWalk()
	{
		String ip = "127.0.0.1";
		String community = "public";
		String targetOid = "1.3.6.1.2.1.25.4.2.1.2";
		SnmpData.snmpWalk(ip, community, targetOid);
	}
	

	public void testAsyWalk()
	{
		String ip = "127.0.0.1";
		String community = "public";

		// 异步采集数据
		SnmpData.snmpAsynWalk(ip, community, "1.3.6.1.2.1.25.4.2.1.2");
	}
	
	@Test
	public void testSetPDU() throws Exception
	{
		String ip = "127.0.0.1";
		String community = "public";
		
		SnmpData.setPDU(ip, community, "1.3.6.1.2.1.1.6.0");
	}
}

输出结果