java利用snmp4j包来读取snmp协议数据（Manager端）

1 snmp简单介绍

java利用snmp4j包来读取snmp协议数据，很简单的一个流程，就是利用java来读取运行snmp协议的数据，例如服务器、PC机或者路由器等运行了snmp协议的设备。

snmp协议是什么呢？

简单网络管理协议（SNMP），由一组网络管理的标准组成，包含一个 应用层 协议（application layer protocol）、 数据库模型 （database schema）和一组资源对象。该协议能够支持 网络管理系统 ，用以监测连接到网络上的设备是否有任何引起管理上关注的情况。该协议是互联网工程工作小组（IETF，Internet Engineering TaskForce）定义的internet协议簇的一部分。SNMP的目标是管理 互联网 Internet上众多厂家生产的软硬件平台，因此SNMP受Internet标准 网络管理 框架的影响也很大。SNMP已经出到第三个版本的协议，其功能较以前已经大大地加强和改进了。

上面是百度百科上对于snmp的一个定义，其实很简单，就是用来管理网络、查看网络信息的一种协议。

2 在本机上开启snmp协议

那么如何在本机上开启snmp协议呢？

首先，在控制面板中找到“卸载程序”；

在弹出的窗口中单击“打开或关闭Windows功能”；

勾选弹出窗口中的“简单网络管理协议（SNMP）”项后单击“确定”并根据提示完成安装即可。

完成SNMP服务的安装后，右键单击“计算机”选择“管理”

 

在弹出的“计算机管理”窗口中左侧导航栏中找到“服务”，并在右侧找到“SNMPService”项；

鼠标双击“SNMPService”选项，在弹出的窗口中切换到“安全”选项卡中，如下图添加“接受的社区名称”和接收那些主机发出的SNMP数据包。

“接受的社区名称”是自己定义的任意字符都可以，接收那些主机发出的SNMP数据包定义成你的Nagios服务器即可。到这里被监控端的Windows主机的SNMP服务就配置完成了。

其中要注意的地方就是，在开启后，还要到服务里面给snmp协议添加public权限。

3 snmp4j.jar包的下载

包用的是snmp4j.jar，下载地址是：http://www.snmp4j.org

 

4 编码测试

 SnmpData：

 

1. package com.test.snmp;

2.  

3. import java.io.IOException;

4. import java.util.ArrayList;

5. import java.util.List;

6. import java.util.concurrent.CountDownLatch;

7. import java.util.concurrent.TimeUnit;

8.  

9. import org.snmp4j.CommunityTarget;

10. import org.snmp4j.PDU;

11. import org.snmp4j.Snmp;

12. import org.snmp4j.TransportMapping;

13. import org.snmp4j.event.ResponseEvent;

14. import org.snmp4j.event.ResponseListener;

15. import org.snmp4j.mp.SnmpConstants;

16. import org.snmp4j.smi.Address;

17. import org.snmp4j.smi.GenericAddress;

18. import org.snmp4j.smi.Integer32;

19. import org.snmp4j.smi.Null;

20. import org.snmp4j.smi.OID;

21. import org.snmp4j.smi.OctetString;

22. import org.snmp4j.smi.VariableBinding;

23. import org.snmp4j.transport.DefaultUdpTransportMapping;

24.  

25. public class SnmpData {

26.  

27. public static final int DEFAULT_VERSION = SnmpConstants.version2c;

28. public static final String DEFAULT_PROTOCOL = "udp";

29. public static final int DEFAULT_PORT = 161;

30. public static final long DEFAULT_TIMEOUT = 3 * 1000L;

31. public static final int DEFAULT_RETRY = 3;

32.  

33. /**

34. * 创建对象communityTarget，用于返回target

35. *

36. * @param targetAddress

37. * @param community

38. * @param version

39. * @param timeOut

40. * @param retry

41. * @return CommunityTarget

42. */

43. public static CommunityTarget createDefault(String ip, String community) {

44. Address address = GenericAddress.parse(DEFAULT_PROTOCOL + ":" + ip

45. + "/" + DEFAULT_PORT);

46. CommunityTarget target = new CommunityTarget();

47. target.setCommunity(new OctetString(community));

48. target.setAddress(address);

49. target.setVersion(DEFAULT_VERSION);

50. target.setTimeout(DEFAULT_TIMEOUT); // milliseconds

51. target.setRetries(DEFAULT_RETRY);

52. return target;

53. }

54. /*根据OID，获取单条消息*/

55. public static void snmpGet(String ip, String community, String oid) {

56.  

57. CommunityTarget target = createDefault(ip, community);

58. Snmp snmp = null;

59. try {

60. PDU pdu = new PDU();

61. // pdu.add(new VariableBinding(new OID(new int[]

62. // {1,3,6,1,2,1,1,2})));

63. pdu.add(new VariableBinding(new OID(oid)));

64.  

65. DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();

66. snmp = new Snmp(transport);

67. snmp.listen();

68. System.out.println("-------> 发送PDU <-------");

69. pdu.setType(PDU.GET);

70. ResponseEvent respEvent = snmp.send(pdu, target);

71. System.out.println("PeerAddress:" + respEvent.getPeerAddress());

72. PDU response = respEvent.getResponse();

73.  

74. if (response == null) {

75. System.out.println("response is null, request time out");

76. } else {

77.  

78. // Vector vbVect =

79. // response.getVariableBindings();

80. // System.out.println("vb size:" + vbVect.size());

81. // if (vbVect.size() == 0) {

82. // System.out.println("response vb size is 0 ");

83. // } else {

84. // VariableBinding vb = vbVect.firstElement();

85. // System.out.println(vb.getOid() + " = " + vb.getVariable());

86. // }

87.  

88. System.out.println("response pdu size is " + response.size());

89. for (int i = 0; i < response.size(); i++) {

90. VariableBinding vb = response.get(i);

91. System.out.println(vb.getOid() + " = " + vb.getVariable());

92. }

93.  

94. }

95. System.out.println("SNMP GET one OID value finished !");

96. } catch (Exception e) {

97. e.printStackTrace();

98. System.out.println("SNMP Get Exception:" + e);

99. } finally {

100. if (snmp != null) {

101. try {

102. snmp.close();

103. } catch (IOException ex1) {

104. snmp = null;

105. }

106. }

107.  

108. }

109. }

110. /*根据OID列表，一次获取多条OID数据，并且以List形式返回*/

111. public static void snmpGetList(String ip, String community, List oidList)

112. {

113. CommunityTarget target = createDefault(ip, community);

114. Snmp snmp = null;

115. try {

116. PDU pdu = new PDU();

117.  

118. for(String oid:oidList)

119. {

120. pdu.add(new VariableBinding(new OID(oid)));

121. }

122.  

123. DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();

124. snmp = new Snmp(transport);

125. snmp.listen();

126. System.out.println("-------> 发送PDU <-------");

127. pdu.setType(PDU.GET);

128. ResponseEvent respEvent = snmp.send(pdu, target);

129. System.out.println("PeerAddress:" + respEvent.getPeerAddress());

130. PDU response = respEvent.getResponse();

131.  

132. if (response == null) {

133. System.out.println("response is null, request time out");

134. } else {

135.  

136. System.out.println("response pdu size is " + response.size());

137. for (int i = 0; i < response.size(); i++) {

138. VariableBinding vb = response.get(i);

139. System.out.println(vb.getOid() + " = " + vb.getVariable());

140. }

141.  

142. }

143. System.out.println("SNMP GET one OID value finished !");

144. } catch (Exception e) {

145. e.printStackTrace();

146. System.out.println("SNMP Get Exception:" + e);

147. } finally {

148. if (snmp != null) {

149. try {

150. snmp.close();

151. } catch (IOException ex1) {

152. snmp = null;

153. }

154. }

155.  

156. }

157. }

158. /*根据OID列表，采用异步方式一次获取多条OID数据，并且以List形式返回*/

159. public static void snmpAsynGetList(String ip, String community,List oidList)

160. {

161. CommunityTarget target = createDefault(ip, community);

162. Snmp snmp = null;

163. try {

164. PDU pdu = new PDU();

165.  

166. for(String oid:oidList)

167. {

168. pdu.add(new VariableBinding(new OID(oid)));

169. }

170.  

171. DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();

172. snmp = new Snmp(transport);

173. snmp.listen();

174. System.out.println("-------> 发送PDU <-------");

175. pdu.setType(PDU.GET);

176. ResponseEvent respEvent = snmp.send(pdu, target);

177. System.out.println("PeerAddress:" + respEvent.getPeerAddress());

178. PDU response = respEvent.getResponse();

179.  

180. /*异步获取*/

181. final CountDownLatch latch = new CountDownLatch(1);

182. ResponseListener listener = new ResponseListener() {

183. public void onResponse(ResponseEvent event) {

184. ((Snmp) event.getSource()).cancel(event.getRequest(), this);

185. PDU response = event.getResponse();

186. PDU request = event.getRequest();

187. System.out.println("[request]:" + request);

188. if (response == null) {

189. System.out.println("[ERROR]: response is null");

190. } else if (response.getErrorStatus() != 0) {

191. System.out.println("[ERROR]: response status"

192. + response.getErrorStatus() + " Text:"

193. + response.getErrorStatusText());

194. } else {

195. System.out.println("Received response Success!");

196. for (int i = 0; i < response.size(); i++) {

197. VariableBinding vb = response.get(i);

198. System.out.println(vb.getOid() + " = "

199. + vb.getVariable());

200. }

201. System.out.println("SNMP Asyn GetList OID finished. ");

202. latch.countDown();

203. }

204. }

205. };

206.  

207. pdu.setType(PDU.GET);

208. snmp.send(pdu, target, null, listener);

209. System.out.println("asyn send pdu wait for response...");

210.  

211. boolean wait = latch.await(30, TimeUnit.SECONDS);

212. System.out.println("latch.await =:" + wait);

213.  

214. snmp.close();

215.  

216. System.out.println("SNMP GET one OID value finished !");

217. } catch (Exception e) {

218. e.printStackTrace();

219. System.out.println("SNMP Get Exception:" + e);

220. } finally {

221. if (snmp != null) {

222. try {

223. snmp.close();

224. } catch (IOException ex1) {

225. snmp = null;

226. }

227. }

228.  

229. }

230. }

231. /*根据targetOID，获取树形数据*/

232. public static void snmpWalk(String ip, String community, String targetOid)

233. {

234. CommunityTarget target = createDefault(ip, community);

235. TransportMapping transport = null;

236. Snmp snmp = null;

237. try {

238. transport = new DefaultUdpTransportMapping();

239. snmp = new Snmp(transport);

240. transport.listen();

241.  

242. PDU pdu = new PDU();

243. OID targetOID = new OID(targetOid);

244. pdu.add(new VariableBinding(targetOID));

245.  

246. boolean finished = false;

247. System.out.println("----> demo start <----");

248. while (!finished) {

249. VariableBinding vb = null;

250. ResponseEvent respEvent = snmp.getNext(pdu, target);

251.  

252. PDU response = respEvent.getResponse();

253.  

254. if (null == response) {

255. System.out.println("responsePDU == null");

256. finished = true;

257. break;

258. } else {

259. vb = response.get(0);

260. }

261. // check finish

262. finished = checkWalkFinished(targetOID, pdu, vb);

263. if (!finished) {

264. System.out.println("==== walk each vlaue :");

265. System.out.println(vb.getOid() + " = " + vb.getVariable());

266.  

267. // Set up the variable binding for the next entry.

268. pdu.setRequestID(new Integer32(0));

269. pdu.set(0, vb);

270. } else {

271. System.out.println("SNMP walk OID has finished.");

272. snmp.close();

273. }

274. }

275. System.out.println("----> demo end <----");

276. } catch (Exception e) {

277. e.printStackTrace();

278. System.out.println("SNMP walk Exception: " + e);

279. } finally {

280. if (snmp != null) {

281. try {

282. snmp.close();

283. } catch (IOException ex1) {

284. snmp = null;

285. }

286. }

287. }

288. }

289.  

290. private static boolean checkWalkFinished(OID targetOID, PDU pdu,

291. VariableBinding vb) {

292. boolean finished = false;

293. if (pdu.getErrorStatus() != 0) {

294. System.out.println("[true] responsePDU.getErrorStatus() != 0 ");

295. System.out.println(pdu.getErrorStatusText());

296. finished = true;

297. } else if (vb.getOid() == null) {

298. System.out.println("[true] vb.getOid() == null");

299. finished = true;

300. } else if (vb.getOid().size() < targetOID.size()) {

301. System.out.println("[true] vb.getOid().size() < targetOID.size()");

302. finished = true;

303. } else if (targetOID.leftMostCompare(targetOID.size(), vb.getOid()) != 0) {

304. System.out.println("[true] targetOID.leftMostCompare() != 0");

305. finished = true;

306. } else if (Null.isExceptionSyntax(vb.getVariable().getSyntax())) {

307. System.out

308. .println("[true] Null.isExceptionSyntax(vb.getVariable().getSyntax())");

309. finished = true;

310. } else if (vb.getOid().compareTo(targetOID) <= 0) {

311. System.out.println("[true] Variable received is not "

312. + "lexicographic successor of requested " + "one:");

313. System.out.println(vb.toString() + " <= " + targetOID);

314. finished = true;

315. }

316. return finished;

317.  

318. }

319. /*根据targetOID，异步获取树形数据*/

320. public static void snmpAsynWalk(String ip, String community, String oid)

321. {

322. final CommunityTarget target = createDefault(ip, community);

323. Snmp snmp = null;

324. try {

325. System.out.println("----> demo start <----");

326.  

327. DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();

328. snmp = new Snmp(transport);

329. snmp.listen();

330.  

331. final PDU pdu = new PDU();

332. final OID targetOID = new OID(oid);

333. final CountDownLatch latch = new CountDownLatch(1);

334. pdu.add(new VariableBinding(targetOID));

335.  

336. ResponseListener listener = new ResponseListener() {

337. public void onResponse(ResponseEvent event) {

338. ((Snmp) event.getSource()).cancel(event.getRequest(), this);

339.  

340. try {

341. PDU response = event.getResponse();

342. // PDU request = event.getRequest();

343. // System.out.println("[request]:" + request);

344. if (response == null) {

345. System.out.println("[ERROR]: response is null");

346. } else if (response.getErrorStatus() != 0) {

347. System.out.println("[ERROR]: response status"

348. + response.getErrorStatus() + " Text:"

349. + response.getErrorStatusText());

350. } else {

351. System.out

352. .println("Received Walk response value :");

353. VariableBinding vb = response.get(0);

354.  

355. boolean finished = checkWalkFinished(targetOID,

356. pdu, vb);

357. if (!finished) {

358. System.out.println(vb.getOid() + " = "

359. + vb.getVariable());

360. pdu.setRequestID(new Integer32(0));

361. pdu.set(0, vb);

362. ((Snmp) event.getSource()).getNext(pdu, target,

363. null, this);

364. } else {

365. System.out

366. .println("SNMP Asyn walk OID value success !");

367. latch.countDown();

368. }

369. }

370. } catch (Exception e) {

371. e.printStackTrace();

372. latch.countDown();

373. }

374.  

375. }

376. };

377.  

378. snmp.getNext(pdu, target, null, listener);

379. System.out.println("pdu 已发送,等到异步处理结果...");

380.  

381. boolean wait = latch.await(30, TimeUnit.SECONDS);

382. System.out.println("latch.await =:" + wait);

383. snmp.close();

384.  

385. System.out.println("----> demo end <----");

386. } catch (Exception e) {

387. e.printStackTrace();

388. System.out.println("SNMP Asyn Walk Exception:" + e);

389. }

390. }

391. /*根据OID和指定string来设置设备的数据*/

392. public static void setPDU(String ip,String community,String oid,String val) throws IOException

393. {

394. CommunityTarget target = createDefault(ip, community);

395. Snmp snmp = null;

396. PDU pdu = new PDU();

397. pdu.add(new VariableBinding(new OID(oid),new OctetString(val)));

398. pdu.setType(PDU.SET);

399.  

400. DefaultUdpTransportMapping transport = new DefaultUdpTransportMapping();

401. snmp = new Snmp(transport);

402. snmp.listen();

403. System.out.println("-------> 发送PDU <-------");

404. snmp.send(pdu, target);

405. snmp.close();

406. }

407. }

 

SnmpTest：

 

1. package com.test.snmp;

2.  

3. import java.util.ArrayList;

4. import java.util.List;

5. import org.snmp4j.log.ConsoleLogFactory;

6. import org.snmp4j.log.LogAdapter;

7. import org.snmp4j.log.LogFactory;

8. import com.test.snmp.SnmpData;

9.  

10. public class SnmpTest {

11.  

12. /**

13. * @param args

14. */

15. public static void main(String[] args) {

16.  

17. // TODO Auto-generated method stub

18. SnmpTest test = new SnmpTest();

19.  

20. test.testGet();

21.  

22. }

23.  

24. public void testGet()

25. {

26. String ip = "127.0.0.1";

27. String community = "public";

28. String oidval = "1.3.6.1.2.1.1.6.0";

29. SnmpData.snmpGet(ip, community, oidval);

30. }

31.  
32.  

33. public void testGetList(){

34. String ip = "127.0.0.1";

35.      String community = "public";

36.      List oidList=new ArrayList();

37.      oidList.add("1.3.6.1.2.1.1.5.0");

38.      oidList.add("1.3.6.1.2.1.1.7.0");

39.    SnmpData.snmpGetList(ip, community, oidList);

40. }

41.  
42.  

43. public void testGetAsyList()

44. {

45. String ip = "127.0.0.1";

46. String community = "public";

47. List oidList=new ArrayList();

48. oidList.add("1.3.6.1.2.1");

49. oidList.add("1.3.6.1.2.12");

50. SnmpData.snmpAsynGetList(ip, community, oidList);

51. System.out.println("i am first!");

52. }

53.  
54.  

55. public void testWalk()

56. {

57. String ip = "127.0.0.1";

58. String community = "public";

59. String targetOid = "1.3.6.1.2.1.1.5.0";

60. SnmpData.snmpWalk(ip, community, targetOid);

61. }

62.  
63.  

64. public void testAsyWalk()

65. {

66. String ip = "127.0.0.1";

67. String community = "public";

68. // 异步采集数据

69. SnmpData.snmpAsynWalk(ip, community, "1.3.6.1.2.1.25.4.2.1.2");

70. }

71.  
72.  

73. public void testSetPDU() throws Exception

74. {

75. String ip = "127.0.0.1";

76. String community = "public";

77. SnmpData.setPDU(ip, community, "1.3.6.1.2.1.1.6.0","jianghuiwen");

78. }

79.  
80.  

81. public void testVersion()

82. {

83. System.out.println(org.snmp4j.version.VersionInfo.getVersion());

84. }

85. }

文档和源码csdn下载：http://download.csdn.net/detail/davebobo/9509435

ref: http://www.tuicool.com/articles/FF7fEbi

ref: http://blog.chinaunix.net/uid-21857285-id-3340206.html

-------------------------更新--------------------------------------

Trap功能的实现：

下面是两个用于发送和接收Trap报文信息的类:

接收Trap消息类：

 

1. import java.io.IOException;

2. import java.net.UnknownHostException;

3. import java.util.Vector;

4.  

5. import org.snmp4j.CommandResponder;

6. import org.snmp4j.CommandResponderEvent;

7. import org.snmp4j.MessageDispatcherImpl;

8. import org.snmp4j.Snmp;

9. import org.snmp4j.TransportMapping;

10. import org.snmp4j.mp.MPv1;

11. import org.snmp4j.mp.MPv2c;

12. import org.snmp4j.mp.MPv3;

13. import org.snmp4j.security.SecurityModels;

14. import org.snmp4j.security.SecurityProtocols;

15. import org.snmp4j.security.USM;

16. import org.snmp4j.smi.Address;

17. import org.snmp4j.smi.GenericAddress;

18. import org.snmp4j.smi.OctetString;

19. import org.snmp4j.smi.TcpAddress;

20. import org.snmp4j.smi.UdpAddress;

21. import org.snmp4j.smi.VariableBinding;

22. import org.snmp4j.transport.DefaultTcpTransportMapping;

23. import org.snmp4j.transport.DefaultUdpTransportMapping;

24. import org.snmp4j.util.MultiThreadedMessageDispatcher;

25. import org.snmp4j.util.ThreadPool;

26.  

27. /**

28. * 本类用于监听代理进程的Trap信息

29. *

30. * @author zhanjia

31. *

32. */

33. public class MultiThreadedTrapReceiver implements CommandResponder {

34.  

35. private MultiThreadedMessageDispatcher dispatcher;

36. private Snmp snmp = null;

37. private Address listenAddress;

38. private ThreadPool threadPool;

39.  

40. public MultiThreadedTrapReceiver() {

41. // BasicConfigurator.configure();

42. }

43.  

44. private void init() throws UnknownHostException, IOException {

45. threadPool = ThreadPool.create("Trap", 2);

46. dispatcher = new MultiThreadedMessageDispatcher(threadPool,

47. new MessageDispatcherImpl());

48. listenAddress = GenericAddress.parse(System.getProperty(

49. "snmp4j.listenAddress", "udp:192.168.1.23/162")); // 本地IP与监听端口

50. TransportMapping transport;

51. // 对TCP与UDP协议进行处理

52. if (listenAddress instanceof UdpAddress) {

53. transport = new DefaultUdpTransportMapping(

54. (UdpAddress) listenAddress);

55. } else {

56. transport = new DefaultTcpTransportMapping(

57. (TcpAddress) listenAddress);

58. }

59. snmp = new Snmp(dispatcher, transport);

60. snmp.getMessageDispatcher().addMessageProcessingModel(new MPv1());

61. snmp.getMessageDispatcher().addMessageProcessingModel(new MPv2c());

62. snmp.getMessageDispatcher().addMessageProcessingModel(new MPv3());

63. USM usm = new USM(SecurityProtocols.getInstance(), new OctetString(MPv3

64. .createLocalEngineID()), 0);

65. SecurityModels.getInstance().addSecurityModel(usm);

66. snmp.listen();

67. }

68.  
69.  

70. public void run() {

71. try {

72. init();

73. snmp.addCommandResponder(this);

74. System.out.println("开始监听Trap信息!");

75. } catch (Exception ex) {

76. ex.printStackTrace();

77. }

78. }

79.  

80. /**

81. * 实现CommandResponder的processPdu方法, 用于处理传入的请求、PDU等信息

82. * 当接收到trap时，会自动进入这个方法

83. *

84. * @param respEvnt

85. */

86. public void processPdu(CommandResponderEvent respEvnt) {

87. // 解析Response

88. if (respEvnt != null && respEvnt.getPDU() != null) {

89. Vector recVBs = respEvnt.getPDU().getVariableBindings();

90. for (int i = 0; i < recVBs.size(); i++) {

91. VariableBinding recVB = recVBs.elementAt(i);

92. System.out.println(recVB.getOid() + " : " + recVB.getVariable());

93. }

94. }

95. }

96.  

97. public static void main(String[] args) {

98. MultiThreadedTrapReceiver multithreadedtrapreceiver = new MultiThreadedTrapReceiver();

99. multithreadedtrapreceiver.run();

100. }

101.  

102. }

发送Trap消息的类：

 

 

1. import java.io.IOException;

2. import java.util.Vector;

3.  

4. import org.snmp4j.CommunityTarget;

5. import org.snmp4j.PDU;

6. import org.snmp4j.Snmp;

7. import org.snmp4j.TransportMapping;

8. import org.snmp4j.event.ResponseEvent;

9. import org.snmp4j.mp.SnmpConstants;

10. import org.snmp4j.smi.Address;

11. import org.snmp4j.smi.GenericAddress;

12. import org.snmp4j.smi.OID;

13. import org.snmp4j.smi.OctetString;

14. import org.snmp4j.smi.VariableBinding;

15. import org.snmp4j.transport.DefaultUdpTransportMapping;

16.  

17. /**

18. * 本类用于向管理进程发送Trap信息

19. *

20. * @author zhanjia

21. *

22. */

23. public class SnmpUtilSendTrap {

24.  

25. private Snmp snmp = null;

26.  

27. private Address targetAddress = null;

28.  

29. public void initComm() throws IOException {

30.  

31. // 设置管理进程的IP和端口

32. targetAddress = GenericAddress.parse("udp:192.168.1.23/162");

33. TransportMapping transport = new DefaultUdpTransportMapping();

34. snmp = new Snmp(transport);

35. transport.listen();

36.  

37. }

38.  

39. /**

40. * 向管理进程发送Trap报文

41. *

42. * @throws IOException

43. */

44. public void sendPDU() throws IOException {

45.  

46. // 设置 target

47. CommunityTarget target = new CommunityTarget();

48. target.setAddress(targetAddress);

49.  

50. // 通信不成功时的重试次数

51. target.setRetries(2);

52. // 超时时间

53. target.setTimeout(1500);

54. // snmp版本

55. target.setVersion(SnmpConstants.version2c);

56.  

57. // 创建 PDU

58. PDU pdu = new PDU();

59. pdu.add(new VariableBinding(new OID(".1.3.6.1.2.3377.10.1.1.1.1"),

60. new OctetString("SnmpTrap")));

61. pdu.add(new VariableBinding(new OID(".1.3.6.1.2.3377.10.1.1.1.2"),

62. new OctetString("JavaEE")));

63. pdu.setType(PDU.TRAP);

64.  

65. // 向Agent发送PDU，并接收Response

66. ResponseEvent respEvnt = snmp.send(pdu, target);

67.  

68. // 解析Response

69. if (respEvnt != null && respEvnt.getResponse() != null) {

70. Vector recVBs = respEvnt.getResponse()

71. .getVariableBindings();

72. for (int i = 0; i < recVBs.size(); i++) {

73. VariableBinding recVB = recVBs.elementAt(i);

74. System.out.println(recVB.getOid() + " : " + recVB.getVariable());

75. }

76. }

77. }

78.  

79. public static void main(String[] args) {

80. try {

81. SnmpUtilSendTrap util = new SnmpUtilSendTrap();

82. util.initComm();

83. util.sendPDU();

84. } catch (IOException e) {

85. e.printStackTrace();

86. }

87. }

88.  

89. }

 

1、运行MultiThreadedTrapReceiver类，提示“开始监听Trap信息!”并处理监听状态

2、运行SnmpUtilSendTrap类，运行完毕后，将会在“开始监听Trap信息!”后面显示：

1.3.6.1.2.3377.10.1.1.1.1 : SnmpTrap
1.3.6.1.2.3377.10.1.1.1.2 : JavaEE

MultiThreadedTrapReceiver输出面板中显示以上两行即表示测试成功！

说明：

      本例只在本人电脑上测试过，操作系统为Windows

ref:http://www.iteye.com/topic/308836
-----------------------------------------------------更新20160621-------------------------------------------------

接下来问题又来了，我们发的trap消息如果manager掉线我们应该考虑将trap消息保存下来，此时snmp inform就用上场了。详解请看下文：http://blog.csdn.net/davebobo/article/details/51730688