java结合opcua遍历搜有节点代码
时间: 2023-07-09 18:36:29 浏览: 83
以下是Java结合OPC UA进行遍历搜有节点的基本代码示例:
```java
import java.util.List;
import java.util.concurrent.CompletableFuture;
import org.eclipse.milo.opcua.sdk.client.OpcUaClient;
import org.eclipse.milo.opcua.sdk.client.api.UaNode;
import org.eclipse.milo.opcua.sdk.client.nodes.UaObjectNode;
import org.eclipse.milo.opcua.sdk.client.nodes.UaVariableNode;
import org.eclipse.milo.opcua.stack.core.Identifiers;
import org.eclipse.milo.opcua.stack.core.UaException;
import org.eclipse.milo.opcua.stack.core.types.builtin.DataValue;
import org.eclipse.milo.opcua.stack.core.types.builtin.NodeId;
import org.eclipse.milo.opcua.stack.core.types.builtin.QualifiedName;
public class OpcUaNodeBrowser {
public static void main(String[] args) throws Exception {
// 连接OPC UA服务器
OpcUaClient client = connectToOPCUAServer();
// 遍历并打印所有节点信息
browseNodes(client, Identifiers.RootFolder);
}
private static OpcUaClient connectToOPCUAServer() throws Exception {
// 创建OPC UA客户端实例
OpcUaClient client = OpcUaClient.create("opc.tcp://localhost:12686/example");
// 异步连接
CompletableFuture<OpcUaClient> future = client.connect();
future.thenAccept(c -> System.out.println("Connected to OPC UA server: " + c.getEndpoint().getEndpointUrl()));
// 等待连接完成
future.get();
return client;
}
private static void browseNodes(OpcUaClient client, NodeId nodeId) throws UaException {
// 获取指定节点的子节点
List<UaNode> children = client.getAddressSpace().getChildren(nodeId).get();
for (UaNode child : children) {
// 打印节点信息
System.out.println(getNodeInfo(child));
if (child instanceof UaObjectNode || child instanceof UaVariableNode) {
// 遍历子节点
browseNodes(client, child.getNodeId());
}
}
}
private static String getNodeInfo(UaNode node) throws UaException {
NodeId nodeId = node.getNodeId();
QualifiedName browseName = node.getBrowseName();
DataValue value = node.readValue();
String info = "Node ID: " + nodeId + ", Browse Name: " + browseName;
if (node instanceof UaVariableNode && value != null && !value.isNull()) {
info += ", Value: " + value.getValue().getValue();
}
return info;
}
}
```
这个示例连接到本地OPC UA服务器,遍历所有节点,并打印节点的ID,浏览名称和值(如果是变量节点)。你可以根据自己的需求进行修改。
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![whl](https://img-home.csdnimg.cn/images/20210720083646.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![whl](https://img-home.csdnimg.cn/images/20210720083646.png)