java snmpv3_snmpv3 java实现

可以使用Java中的SNMP4J库来实现SNMPv3协议。SNMP4J是一个免费的Java库，提供了SNMPv1、SNMPv2c和SNMPv3的实现。以下是一个简单的示例代码，用于使用SNMPv3获取远程设备的系统描述信息：

import org.snmp4j.CommunityTarget;
import org.snmp4j.Snmp;
import org.snmp4j.TransportMapping;
import org.snmp4j.UserTarget;
import org.snmp4j.mp.SnmpConstants;
import org.snmp4j.security.AuthMD5;
import org.snmp4j.security.AuthSHA;
import org.snmp4j.security.Priv3DES;
import org.snmp4j.security.PrivAES128;
import org.snmp4j.security.PrivAES192;
import org.snmp4j.security.PrivAES256;
import org.snmp4j.security.SecurityLevel;
import org.snmp4j.security.SecurityModels;
import org.snmp4j.security.SecurityProtocols;
import org.snmp4j.security.USM;
import org.snmp4j.smi.Address;
import org.snmp4j.smi.GenericAddress;
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;
import org.snmp4j.util.DefaultPDUFactory;
import org.snmp4j.util.TreeUtils;
import org.snmp4j.util.TreeEvent;
import org.snmp4j.util.TreeListener;

public class SNMPv3Example {

    public static void main(String[] args) throws Exception {
        String host = "192.168.0.1";
        String user = "username";
        String authPass = "authPassword";
        String privPass = "privPassword";
        int port = 161;
        int retries = 2;
        int timeout = 1000;
        String oid = ".1.3.6.1.2.1.1.1.0";

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

        OctetString securityName = new OctetString(user);
        OID authProtocol = AuthMD5.ID;
        OID privProtocol = PrivAES128.ID;
        OctetString authPassphrase = new OctetString(authPass);
        OctetString privPassphrase = new OctetString(privPass);

        USM usm = new USM(SecurityProtocols.getInstance().addDefaultProtocols(),
                new OctetString(MPv3.createLocalEngineID()), 0);
        SecurityModels.getInstance().addSecurityModel(usm);

        snmp.getUSM().addUser(securityName, new AuthSHA(authPassphrase),
                new PrivAES128(privPassphrase),
                new OctetString(MPv3.createLocalEngineID()), SecurityLevel.AUTH_PRIV);

        Address targetAddress = GenericAddress.parse("udp:" + host + "/" + port);
        UserTarget target = new UserTarget();
        target.setAddress(targetAddress);
        target.setRetries(retries);
        target.setTimeout(timeout);
        target.setVersion(SnmpConstants.version3);
        target.setSecurityLevel(SecurityLevel.AUTH_PRIV);
        target.setSecurityName(securityName);

        TreeUtils treeUtils = new TreeUtils(snmp, new DefaultPDUFactory());
        TreeListener listener = new TreeListener() {
            public boolean next(TreeEvent e) {
                VariableBinding[] vbs = e.getVariableBindings();
                if (vbs != null) {
                    for (VariableBinding vb : vbs) {
                        System.out.println(vb.getOid() + " = " + vb.getVariable());
                    }
                }
                return true;
            }
        };
        treeUtils.getSubtree(target, new OID(oid)).addTreeListener(listener);
        treeUtils.getSubtree(target, new OID(oid)).setMaxRepetitions(10);
        treeUtils.getSubtree(target, new OID(oid)).setNonRepeaters(0);
        treeUtils.walk(target, new OID(oid), null, listener);

        snmp.close();
    }
}

以上代码演示了如何使用SNMPv3协议通过Java代码获取远程设备的系统描述信息。需要注意的是，该示例代码中使用了MD5和AES128算法进行身份验证和加密。如果需要使用其他算法，可以根据实际情况进行更改。