本文主要是介绍java代码配置连接OPCUA，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
pom依赖如下
<dependency><groupId>org.eclipse.milo</groupId><artifactId>sdk-client</artifactId><version>0.6.9</version>
</dependency><dependency><groupId>org.eclipse.milo</groupId><artifactId>sdk-server</artifactId><version>0.6.9</version>
</dependency><dependency><groupId>org.bouncycastle</groupId><artifactId>bcprov-jdk15on</artifactId><version>1.70</version>
</dependency>
业务代码
package com.opcua.opcuatest.serve;import org.eclipse.milo.opcua.sdk.client.OpcUaClient;
import org.eclipse.milo.opcua.sdk.client.api.identity.UsernameProvider;
import org.eclipse.milo.opcua.stack.core.AttributeId;
import org.eclipse.milo.opcua.stack.core.security.SecurityPolicy;
import org.eclipse.milo.opcua.stack.core.types.builtin.*;
import org.eclipse.milo.opcua.stack.core.types.builtin.unsigned.UInteger;
import org.eclipse.milo.opcua.stack.core.types.enumerated.MonitoringMode;
import org.eclipse.milo.opcua.stack.core.types.enumerated.TimestampsToReturn;
import org.eclipse.milo.opcua.stack.core.types.structured.MonitoredItemCreateRequest;
import org.eclipse.milo.opcua.stack.core.types.structured.MonitoringParameters;
import org.eclipse.milo.opcua.stack.core.types.structured.ReadValueId;import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;/*** <p>** </p>** @author wsh* @date 2023/4/27 21:35*/
public class OpcUaTest {//opc ua服务端地址private final static String endPointUrl = "opc.tcp://127.0.0.1:49320";public static void main(String[] args) {try {//创建OPC UA客户端OpcUaClient opcUaClient = createClient();//开启连接opcUaClient.connect().get();// 订阅消息subscribe(opcUaClient);// 写入
// writeValue(opcUaClient);// 读取
// readValue(opcUaClient);// 关闭连接opcUaClient.disconnect().get();} catch (Exception e) {throw new RuntimeException(e);}}/*** 创建OPC UA客户端** @return* @throws Exception*/private static OpcUaClient createClient() throws Exception {Path securityTempDir = Paths.get(System.getProperty("java.io.tmpdir"), "security");Files.createDirectories(securityTempDir);if (!Files.exists(securityTempDir)) {throw new Exception("unable to create security dir: " + securityTempDir);}return OpcUaClient.create(endPointUrl,endpoints ->endpoints.stream().filter(e -> e.getSecurityPolicyUri().equals(SecurityPolicy.None.getUri())).findFirst(),configBuilder ->configBuilder.setApplicationName(LocalizedText.english("")) // huazh-01.setApplicationUri("") // ns=2:s=huazh-01.device1.data-huazh//访问方式 new AnonymousProvider().setIdentityProvider(new UsernameProvider("ua", "12345678901112")).setRequestTimeout(UInteger.valueOf(5000)).build());}private static void subscribe(OpcUaClient client) throws Exception {//创建发布间隔1000ms的订阅对象client.getSubscriptionManager().createSubscription(1000.0).thenAccept(t -> {//节点ns=2;s=test.device2.test2NodeId nodeId = new NodeId(2, "test.device2.test2");ReadValueId readValueId = new ReadValueId(nodeId, AttributeId.Value.uid(), null, null);//创建监控的参数MonitoringParameters parameters = new MonitoringParameters(UInteger.valueOf(1), 1000.0, null, UInteger.valueOf(10), true);//创建监控项请求//该请求最后用于创建订阅。MonitoredItemCreateRequest request = new MonitoredItemCreateRequest(readValueId, MonitoringMode.Reporting, parameters);List<MonitoredItemCreateRequest> requests = new ArrayList<>();requests.add(request);//创建监控项，并且注册变量值改变时候的回调函数。t.createMonitoredItems(TimestampsToReturn.Both,requests,(item, id) -> item.setValueConsumer((it, val) -> {System.out.println("=====订阅nodeid====== :" + it.getReadValueId().getNodeId());System.out.println("=====订阅value===== :" + val.getValue().getValue());}));}).get();//持续订阅Thread.sleep(Long.MAX_VALUE);}public static void readValue(OpcUaClient client) {try {NodeId nodeId = new NodeId(2, "test.device.name");DataValue value = client.readValue(0.0, TimestampsToReturn.Both, nodeId).get();System.out.println("=====读取ua1====：" + value.getValue().getValue());} catch (Exception e) {e.printStackTrace();}}public static void writeValue(OpcUaClient client) {try {//创建变量节点 test.device2.test2NodeId nodeId = new NodeId(2, "test.device2.test2");//uda3 booleanShort value = 11;//创建Variant对象和DataValue对象Variant v = new Variant(value);DataValue dataValue = new DataValue(v, null, null);StatusCode statusCode = client.writeValue(nodeId, dataValue).get();System.out.println(statusCode);System.out.println("=====写入ua1====：" + statusCode.isGood());} catch (Exception e) {e.printStackTrace();}}
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